"Koobface" is the name of the Trojan worm that's been making its way through the social networking site Facebook lately, but to the site's users, it's been simply known as "the Facebook virus." That name will soon become a misnomer, though, because the worm is now spreading outside of Facebook's walls to attack other social networks like Bebo, MySpace, Friendster, MyYearbook, and Blackplanet.

About Koobface

Once a computer has become infected with the Kooface worm, it spams the friends belonging to the owner of the computer by leaving comments on their profiles. Those comments appear to come from the infected user, saying things like "Are you sure this is your first acting experience?", "is it u there?", "impressive. i'm sure it's you on this video", "How can anyone get so busted by a spy camera?" and "You're the whole show! i'm admired with you." Save for that last one, whose bad English will likely raise a flag that all is not what it seems, the other comments appeal to people's vanity. They wonder: is that really a video of me? and then click through on the link provided.

How To Protect Yourself From Koobface

Besides doing the obvious - running an up-to-date antivirus, security patches, and firewalls - you should be on the look out for the following:

A sample spam message:

The malicious site:

The warning message:

You should also keep an eye on Facebook's security page (http://www.facebook.com/security) which warns of the latest threats.