Take a second look though, the link gets directed to a site supposedly hosting a video posted by the same person that was received the Facebook message from. In fact not only was the malicious landing page displaying his name, it had also pulled the photo from his Facebook profile. A very neat little piece of social engineering.
Clicking the Install button redirects to a download site for the file setup.exe which is the new Koobface variant detected as WORM_KOOBFACE.AZ. It is hosted on an IP address in another part of the world, and in the last hour, we’ve seen 300+ different unique IP addresses hosting setup.exe and we’re expecting more. All seen IP addresses hosting the said malicious file are now detected as HTML_KOOBFACE.BA.
Analysis by engineers reveal that WORM_KOOBFACE.AZ propagates through other social networking sites as well. It first searches for cookies created by the following sites:
* facebook.com
* hi5.com
* friendster.com
* myyearbook.com
* myspace.com
* bebo.com
* tagged.com
* netlog.com
* fubar.com
* livejournal.com
More at; http://blog.trendmicro.com/new-variant-of-koobface-worm-spreading-on-facebook/