Most of the time when you click on a Facebook link that a friend has posted, you get something nice. An amusing photo of a man embarrassed by his decisions. A video of Maru jumping into a box. But, if your friend has been infected with the Ramnit worm, youll end up losing something.Security company Seculert had been tracking the Ramnit worm when it discovered that the little beast jumped from committing financial fraud to stealing Facebook login credentials. Discovered in April of 2010, the worm is a multi-component malware that infects Windows executables, Office files, and HTML files. Once infected, it uses those files to steal authentication and transaction signing systems according to Microsoft.

via Worm Infects 45,000 Facebook Users, Then Goes After Their Friends.