This directory contains the win32 payload development environment used
for creating the payloads in version 2.2 of the Metasploit Framework.
The 'nasm' executable must be in your path to use the included build tool.
The included 'build' script automatically creates a number of file types
each time it used to compile a payload. These file types are:
- Native ELF executable
- Win32 PE executable
- Generated C source code
- Raw opcodes in ".bin" format
The PE executable templates were developed by 'rix' and used with permission.
To use this script, simply run ./build <name of payload>, where the name
does not include the ".asm" suffix. To build win32_stage_api.asm, the
command line would be "./build win32_stage_api".
The Win32 payloads are somewhat modular, each component includes other
components to create the final payload. The dependency tree for the
reverse connect shell is:
win32_stage_api.asm
win32_stage_boot_winsock_conn.asm
win32_stage_boot_reverse.asm
win32_stage_shell.asm
This allows the different components to be maintained invidually, shared
among multiple payloads, and converted into multi-stage payloads almost
instantly. This release includes the following last-stage payloads:
win32_stage_shell.asm
Executes cmd.exe with in/out redirected to socket, this is used by
the reverse connect and bind stagers.
win32_stage_winexec.asm
This payload simply executes an arbitrary command line, it can be used to
accomplish things such as ftp/download/execute sequences, adding a user
accounts, or just signaling that the exploit was successful.
win32_stage_inlineegg.asm
Writes GetProcAddress/LoadLibaryA address to socket, then reads and execs
the rest of the payload from the socket. This allows us to send InlineEgg
generated payloads as a last stage.
win32_stage_uploadexec.asm
Reads a file size from socket, then opens up a hidden/system local file
(c:\metasploit.exe) and downloads the executable from the socket into this
file. Once the download is complete, it then executes this file with in/out
redirected to the socket. This can be extremely useful when combined with
a self-extracting/executing rootkit or language intepreter (perl.exe).
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