News.com: "Having long targeted e-mail with sometimes devastating effects, virus and worm creators are
setting their sights on IM services. Infected files, for example, have been burrowing their way
slowly through Microsoft's MSN Messenger network over the past few months.
Discovered by virus hunters in late June, the so-called Choke worm marked the second attack
aimed at MSN Messenger in as many months. In May, the service was struck by the W32/Hello