"The name given to a computer worm that uses Facebook's
messaging system to infect PCs in an attempt to gather sensitive
information such as credit card numbers.
"Koobface propagates by sending notes to Facebook friends of
someone whose PC has been infected. The messages, with subject
headers like, "You look just awesome in this new movie," direct
recipients to a Web site where they are asked to download what it
claims is an update of Adobe Systems Inc's Flash player.
"If they download the software, users end up with an infected
computer, which then takes users to contaminated sites when they
try to use search engines from Google, Yahoo, MSN and Live.com,
"The Koobface virus also attacks users of the MySpace social
networking site. Variants of the worm include
Net-Worm.Win32.Koobface.a. and Net-Worm.Win32.Koobface.b. "