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MrDec Ransomware (.<Original Extension> [ID]<Random>[ID])

  • Distribution Method : Unknown
 
  • MD5 : f86291e994c2e9cb0bb9650d362ee625
 
  • Major Detection Name : Ransom.MrDec (Malwarebytes), Ransom_MRDEC.A (Trend Micro)
 
  • Encrypted File Pattern : .<Original Extension> [ID]<Random>[ID]
 
  • Malicious File Creation Location :
     - C:\Windows\clerlog.bat
     - C:\Windows\wincmd.exe
     - C:\Decoding help.hta
 
  • Payment Instruction File : Decoding help.hta
 
  • Major Characteristics :
     - Offline Encryption
     - DXXD / LockCrypt Ransomware series
     - Encryption starts after killing all process except listed in whitelist processes
     - Turns off User Access Control (UAC)
     - Disable system restore (vssadmin delete shadows /all)
     - Deletes event log

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