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Cryakl Ransomware (<Random>-<Random>.fname-<Original Filename>.<Original Extension>.doubleoffset)

  • Distribution Method : Remote access through Remote Desktop Protocol(RDP) or Terminal Services
  • MD5 : 428d5484e385bc862cca92511596f0c9
  • Major Detection Name : Ransom:Win32/Cryakl.A (Microsoft), Trojan.Win32.S.Ransom.185344 (ViRobot)
  • Encrypted File Pattern :<Random>-<Random>.fname-<Original Filename>.<Original Extension>.doubleoffset
  • Malicious File Creation Location : C:\Users\%UserName%\AppData\Local\Temp\<Random>.exe
  • Payment Instruction File : README.txt
  • Major Characteristics :
     - Offline Encryption
     - Neutralizes system recovery by adding to task schedular: VssDataRestore, which executes command vssadmin delete shadows /all /quiet