When the Koobface worm hit Facebook users last year, the company s security team scrambled to help affected users reset their accounts and avoid new infections. The worm has continued to crop up periodically since then, and so the anti-malware team at Microsoft has been helping the Facebook technicians get a handle on the attack. Since releasing our newest version of MSRT two weeks ago, we ve removed nearly 200,000 times from over 133,677 computers in more than 140 different locales around the world.
Source: https://threatpost.com/microsoft-teams-facebook-halt-koobface-worm-040209/72534/