Windows 2003/XP/2000/NT/ME/98/95

Koobface.W is a worm that spreads by copying itself, without infecting other files.

It uses stealth techniques to avoid being detected by the user:

• It injects itself in running processes.

Koobface.W uses the following propagation or distribution methods:

• Exploiting vulnerabilities with the intervention of the user: exploiting vulnerabilities in file formats or applications. To exploit them successfully it needs the intervention of the user: opening files, viewing malicious web pages, reading emails, etc.
• Peer-to-peer (P2P) file sharing programs: it makes copies of itself with enticing names in shared folders belonging to these programs. Other users of this type of networks then voluntarily download and run the infected files.