Published Aug 29, 2012|Updated Jan 10, 2018


Alert level: Severe Detected with Windows Defender Antivirus

Also detected as: FBI virus (other) FBI moneypak (other) Lockscreen (other)

Windows Defender Antivirus detects and removes this threat. 

This family of ransomware can lock your PC and show you a full-screen message, commonly called a "lock screen".

It pretends to be from the FBI or a national police force and tries to scare you into paying a fine to unlock your PC.

These threats can be installed on your PC when you visit a hacked webpage. We have also seen them installed by other malware.

Our ransomware FAQ page has more information on this type of threat.


The trend towards increasingly sophisticated malware behavior, highlighted by the use of exploits and other attack vectors, makes older platforms so much more susceptible to ransomware attacks. From June to November 2017, Windows 7 devices were 3.4 times more likely to encounter ransomware compared to Windows 10 devices.


Read our latest report: A worthy upgrade: Next-gen security on Windows 10 proves resilient against ransomware outbreaks in 2017.