McAfee Avert Labs Blog just announced that the Koobface worm has reached Twitter. Appearantly, users are sent fake tweets with a video link and once they click on that they are prompted to download a video codec. However, instead of downloading a video codec, the malware is downloaded to the hard drive. These variants have been detected as W32/Koobface.worm.gen.e and W32/Koobface.worm.gen.h by McAfee.

What to do if you get a video link? Don’t download anything it prompts you for!