Santa Claus: The Internet Virus

Users of instant messaging systems MSN, AIM, ICQ, and Yahoo could get smacked with a worm that entices people to click on a link to
Santa Claus.

This gift is one you'll wish you'd never opened. The IM.GiftCom.All worm arriving by those IM systems or over Windows Messenger appears to be a URL linked to a picture of Santa Claus. IMLogic, which discovered the worm, posted that clicking the URL launches an executable file.