Windows Defender detects and removes this threat.

This ransomware can stop you from using your PC or accessing your data. It might ask you to pay money to a malicious hacker.

This threat uses an infected Microsoft Office file to download the ransomware onto your PC. It can arrive on your PC as spam email attachment, usually as a Word file (.doc). We have also seen this ransomware being downloaded by TrojanDownloader:JS/Nemucod, TrojanDownloader:JS/Swabfex, TrojanDownloader:JS/Locky, TrojanDownloader:Win32/Locky, through exploit kits, or from spam emails.

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.

This threat is classified as a worm that spreads over the network. A pure network worm propagates without any user interaction, such as, without requiring the user to open any file or take any action. Generally, a network worm spreads by an exploit of vulnerable software. This threat is detected by the Microsoft antivirus engine. Technical details are not currently available.

Windows Defender detects and removes this threat.

This ransomware can stop you from using your PC or accessing your data. It might ask you to pay money to a malicious hacker.

This threat uses an infected Microsoft Office file to download the ransomware onto your PC. It can arrive on your PC as spam email attachment, usually as a Word file (.doc). We have also seen this ransomware being downloaded by TrojanDownloader:JS/Nemucod, TrojanDownloader:JS/Swabfex, TrojanDownloader:JS/Locky, TrojanDownloader:Win32/Locky, through exploit kits, or from spam emails.

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.