Nothing starts the week off right like a big pot of freshly brewed worm! Yup, it’s that time again folks! Time to run for the hills as the Bofra worm creeps its way on to unsuspecting Internet Explorer users’ computers.

Apparently it has infected popular European Web sites this weekend and then moved on to ’spread the love’ onto PCs like yours! One third party ad company, Falk AG became infected reported The Register Sunday. Man, not even the ads we visit are safe anymore! Thank goodness for Google ads I guess.

Web site visitors who clicked on banner ads on a number of popular European Web sites this weekend could have infected their computers with variants of the Bofra worm, experts warned on Monday. The attacks take advantage of an unpatched buffer overflow flaw in the way Internet Explorer 6 (IE) handles the IFrame tag, and has been confirmed on PCs running Windows XP with Service Pack 1 and Windows 2000, according to a warning posted Sunday on the SANS (SysAdmin, Audit, Network, Security) Institute Web site. Windows XP Service Pack 2 (SP2) is not vulnerable, it said.

The vulnerability allows attackers to gain complete control of a user’s computer.

Also on Sunday, U.K. technology news Web site The Register reported that its third party ad serving company Falk AG became infected with the Bofra/IFrame exploit, forcing the Web site to suspend its ads from Falk.