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Windows Defender Antivirus detects and removes this threat.
Win32/Koobface is 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.