W32/GenKryptik.BQOS!tr.ransom

Analysis

W32/GenKryptik.BQOS!tr.ransom is a generic detection for a Ransomware GandCrab trojan. Since this is a generic detection, this malware may have varying behaviour.
Below are some of its observed characteristics/behaviours:

• This malware may drop any of the following file(s):
  
  • %AppData%\microsoft\[Random].exe : This file is detected as W32/GenKryptik.BQOS!tr.ransom.
  • crab-decrypt.txt : This file will serve as ransom notes.
  • gdcb-decrypt.txt : This file will serve as ransom notes.


• This malware may connect to any of the following remote sites(s):
  
  • dns{Removed}.soprodns.ru
  • dns{Removed}.soprodns.ru
  • 6{Removed}.171.248.178
  • ns{Removed}.virmach.ru
  • ns{Removed}.virmach.ru


• Affected files of this Ransomware will use the filenaming format [OriginalFileName].[Ext].gdcb or [OriginalFileName].[Ext].crab .


• This malware may apply any of the following registry modification(s):
  
  • HKEY_CURRENT_USER\Software\Microsoft\Windows\Currentversion\Runonce
    
    [Random] = %AppData%\microsoft\[Random].exe
    Entries made by executable programs are deleted after being processed.
    

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.