Have you noticed your friends posting on your wall with something like this: “xxxx, you have to see this!” and it posts a video that says something about a video scandal of President Obama and Hilarry Clinton. Apparently, most of my friends were infected with this and are now spamming the walls of their friends. The application looks fishy and who knows what it will do to your profile so I suggest you don’t click on the link once it appears on your wall. Better if you can block the application itself.

From the Koobface Virus Fan Page its says

    *WARNING* KOOBFACE VIRUS attack at your Facebook wall. Don’t open if someone wrote to your wall about “Barack Obama Hillary Clinton – Sex Scandal”. It will lead you to download the KOOBFACE VIRUS. (please pass)

Confused about Virus, Worm, Trojan? They are all malwares or malicious softwares. Wikipedia says:

    The term “computer virus” is sometimes used as a catch-all phrase to include all types of malware, including true viruses.
    Software is considered malware based on the perceived intent of the creator rather than any particular features. Malware includes computer viruses, worms, trojan horses, spyware, dishonest adware, crimeware, most rootkits, and other malicious and unwanted software.

Be careful..once you received it..delete it!