Fyi

Here is a little information to help you fix the problem with viruses on your website.

1. The site was compromised via a security flaw vulnerability.
   
2. And malicous code was added to certain files on your server; this being an invisible iframe with zero width/height, this iframe uses java to facilitate the transfer of the viruses.
   
3. It's nothing to do with the adverts you was running.

To users:

• Scan your PC with Malwarebytes.
  
• Use an ad-blocker for your brower (although ads were not the problem this time they sometimes can be)
  
• Uninstall Java as it is a major security risk unless regularly updated, and even when updated it still presents a major security risk especially with regard to these hidden iframe attacks that are becoming more popular on the web. Not running Java does nothing to your PC but it may stop some features on websites working (unimportant stuff regardless).

FYI: I didn't get infected at all and I visit the clan page daily, I also have no firewall and no protection whatsoever and that is because I use this Harddrive just for CF, I of course do not run Java;) I did however see that the clan page wanted me to run an addon (most likely Java) and it asked because I don't have it installed.