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

  • Distribution Method : Unknown
  • MD5 : 4cc0b1a3e3a4938a04567bde145c9e1d
  • Major Detection Name : a variant of Win32/Kryptik.GQKH (ESET), Trojan:Win32/Bluteal!rfn (Microsoft)
  • Encrypted File Pattern :<Random>-<Random>.fname-<Original Filename>.<Original Extension>.doubleoffset
  • Malicious File Creation Location :
     - C:\Users\%UserName%\AppData\Local\Temp\<Random>.exe
     - C:\Windows\System32\Tasks\VssDataRestore
  • 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"