According to security experts and anti-virus software vendor F-Secure, a new malware attack is currently being spread via Facebook pages. The attacks are propagated by a malicious worm which steals victims Facebook information. Users receive a message from infected friends with links to a YouTube video. If Windows users click on the link to view the video, they are prompted to first download an updated version of Flash.
If the rogue Flash program is installed, the worm scans the newly infected users system for Facebook cookies and, in turn, sends new attack messages to the victims friend list.
Since the YouTube video link appears to originate from a friend, Facebook users are more willing to click on it.