A friend on Facebook
suggests that you watch an amazing or funny or sexy video. The link may
seem innocuous enough. But with a few simple clicks, you could end up
infecting your PC with the Koobface worm.
Koobface, whose name is an anagram for its preferred social network, is a
malicious program that has plagued Facebook for more than two years,
ensnaring hundreds of thousands of people and keeping the site’s
security team on the defense.