Thank-you very much for your help!
Do you know what “\x65\x76\x61\x6C\x28” is and how I can remove it so my files don’t appear to be malicious?
Here’s an example (please not file is very long, hence the ellipsis):
<?php
echo ‘walex’;
preg_replace(“\x2F\x2E\x2A\x2F\x65”,”\x65\x76\x61\x6C\x28\x67\x7A\x69\x6E\x66\x6C\x61\x74\x65\x28\x62\x61\x73\x65\x36\x34\x5F\x64\x65 …