JS/Nemucod.DOH!tr

Analysis

JS/Nemucod.DOH!tr is a generic detection for a type of Javascript trojan that downloads and runs the Gryphon ransomware onto the compromised computer. Since this is a generic detection, files that are detected as JS/Nemucod.DOH!tr may have varying behavior.
Below are examples of some of these behavior:

• It adds the ".crypton" extension to encrypted files.


• It attempts to connect to the following URL:
  
  • hxxp://soun{Removed}.info/admin.php?f=1.dat

Recommended Action

• Make sure that your FortiGate/FortiClient system is using the latest AV database.
• Quarantine/delete files that are detected and replace infected files with clean backup copies.