A relatively new naughty little worm courtesy of Seedcorn Advertising (IM-Worm.TopInstalls.A) does nothing noticeable upon infection, but if you’ve got ICQ, Yahoo IM, AIM or MSN Messenger, it automatically sends all of your buddies a link to an installer for a full infest of bundled adware/malware from our dear friends at.
Example:
Alex Eckelberry
(Thanks, Patrick Jordan)