Two Malicious Ad-Ons Made It Onto Firefox

A bit of an embarrassment for Mozilla Firefox – and it comes at a a bad time too, right when they’re loosing their dominance in the browser world as Chrome catches up.

Mozilla has been known as a very safe browser as compared to its old enemy, Internet Explorer. In fact, many people used it for just that reason. So the last thing Mozilla needed was reports of Malware in two ad-ons which were available for download from their website.

“Two add-ons in the experimental section of addons.mozilla.org were found to be containing malware,” Mozilla said on its security blog. “These were not originally detected with the anti-malware scanning tools that we have been using. We have since increased the number of scanning tools, and will be taking additional steps to minimize the risk of further incidents.

It is thought that well in excess of 4,000 downloads of the ad-ons have taken place since they were first released in September. So are you one of the thousands of people who inadvertently infected their own machines? Well if you downloaded Sothink 4.0 and all versions of Master Filer then there’s a good chance you are. These installed Win32.LdPinch.gen and Win32.Bitfrose.32.Bitfrose Trojan respectively. So if you have downloaded these, I suggest running a scan of your system ASAP.