Windows Defender detects and removes this threat.

This worm posts messages to your Facebook and Skype friends with links to malicious websites.

It is installed on your PC when you visit a link sent to you in a Facebook or Skype message. It is also downloaded by other malware, such as Trojan:Win32/Napolar.A.

Windows Defender Antivirus detects and removes this threat.

Worm:Win32/Dorpiex.A sends Facebook messages that contain a web link that downloads additional malware onto your computer. It is a worm which spreads to other computers. It does this by infecting removable drives (such as USB drives or portable hard disks) that you have plugged into your computer. If you then plug those drives into another computer, the worm will infect that computer as well.

See our infographic to the right for a depiction of how a worm spreads by removable drives.

We have observed it being dropped and run by Trojan:Win32/Alureon.GC.

Windows Defender detects and removes this threat.

This trojan can download other malware, including Worm:Win32/Dorpiex.B and the bitcoin-miner Trojan:Win32/Vicenor.gen!B.

It can be installed on your PC when you click on a link that is sent to you on social media.

Find out ways that malware can get on your PC.

Windows Defender detects and removes this threat.

This malware family can download and run files on your PC and steal online user names and passwords. They can also use your PC as part of a DDoS attack.

These threats are installed on your PC when you click a link in a suspicious Facebook message.