"Koobface" infects users . Unlike some worms, Koobface requires some effort on the part of the user in order for it to . First, it delivers a with a link from the account of an infected user. The potential victim must then click on the link, download a file (usually disguised as an update to Adobe Flash Player), and then run the file. If they do so, Koobface can infect the computer and use it to send more messages.

Koobface has infected an estimated , and it because it sends messages to "friends" of infected Facebook users, usually with tantalizing, legitimate-sounding subject lines such as "Spring Break Bikini Mud-Jello Wrestling Youtube Video LOL!!!"

Year: 2012

Predicted outcome: End of the world; end of