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Stop Ransomware (.yoqs)

  • Distribution Method : Unknown
 
  • MD5 : f285131b0f21611a742c53ae84d24a37
 
  • Major Detection Name : Ransomware/Win.Stop.R469923 (AhnLab V3), Win32:AceCrypter-D [Cryp] (Avast)
 
  • Encrypted File Pattern : .yoqs
 
  • Malicious File Creation Location :
     - C:\SystemID
     - C:\SystemID\PersonalID.txt
     - C:\Users\%UserName%\AppData\Local\<Random>-<Random>-<Random>-<Random>-<Random>
     - C:\Users\%UserName%\AppData\Local\<Random>-<Random>-<Random>-<Random>-<Random>\build2.exe
     - C:\Users\%UserName%\AppData\Local\<Random>-<Random>-<Random>-<Random>-<Random>\<Random>.exe
     - C:\Users\%UserName%\AppData\Local\bowsakkdestx.txt
     - C:\Windows\System32\Tasks\Time Trigger Task
 
  • Payment Instruction File : _readme.txt
 
  • Major Characteristics :
     - Offline Encryption
     - Reruns by adding "Time Trigger Task" in Task Scheduler to run "%LocalAppData%\<Random>-<Random>-<Random>-<Random>-<Random>\<Random>.exe --Task" for every 5 minutes.
     - Generates additional AZORult malware (Info stealer)

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