Worm:Win32/Koobface.U is a worm that spreads by posting messages, containing a link to the worm, to the pages of other contacts on social network sites such as Facebook. The worm has backdoor functionality that allows limited remote access and control.

Worm:Win32/Koobface.gen!d is generic detection for variants of Win32/Koobface, a multi-component family of malware used to compromise machines and direct them in various ways at the attacker's will. This could include using the affected machine to distribute additional malware, generate 'pay per click' advertising revenue, steal sensitive data, break captchas, and subvert the affected user's online experience. Its components are varied, but include a worm that spreads by utilizing social networking sites such as Facebook and MySpace.

Worm:Win32/Koobface.P is a worm that spreads by posting messages, containing a link to the worm, to the pages of other contacts on social network sites such as Facebook. This variant of Koobface may arrive posing as an installer for the Internet communications application "Skype".

Worm:Win32/Koobface.gen!F is generic detection for variants of Win32/Koobface, a multi-component family of malware used to compromise machines and direct them in various ways at the attacker's will. This could include using the affected machine to distribute additional malware, generate 'pay per click' advertising revenue, steal sensitive data, break captchas, and subvert the affected user's online experience. Its components are varied, but include a worm that spreads by utilizing social networking sites such as Facebook and MySpace.