So you think .exe’s and other executable files downloaded from internet may have virus in them? As every kid knows about this, virus writers have become smart and now they spread virus through stuff which we can never imagine having virus/trojans in them.
Free templates, we love them because they cost nothing and make our website/blog look good without paying any money. Free wordpress templates are quite popular downloads and due to this now trojans are spread through these free wordpress templates. Some days back while searhing for free zen cart tremplates I found a site which had some very nice free wordpress templates instead, I was almost pinching myself that how can these be free (they looked like premium templates) and it was not from any warez or any kind of illegal download website either. I downloaded some of them and later on my antivirus software catches them as trojan during full system scan.
Just like most virus are made for Windows OS because its popular, popular CMS are targetted by virus wrtiers. Best will be to stick to reputed sites for templates downloads and design your own if you want a really good design without paying a premium price. Also keep your antivirus definition up to date and do full system scan periodically.