Facebook again attacked by Virus

There is a bad news for all the facebook users because Facebook is again attacked by a virus dubbed "Koobface" that uses the social network's messaging system to infect PCs, then tries to gather sensitive information such as credit card numbers.As all we know that few days ago facebook is also attacked by some unidentified virus and now this is the second time when facebook is attacked.This virus "koobface" works by sending notes to friends of someone whose PC has been infected.McAfee has not yet identified the perpetrators behind Koobface, who are improving the malicious software behind the virus in a bid to outsmart security at Facebook and MySpace.