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Matrix Ransomware (<Original Filename>.<Original Extension> / WhatHappenedWithMyFiles.rtf)

  • Distribution Method : Automatic infection using exploit by visiting website
 
  • MD5 : 75165fcbaa70713b33321bcf6756e9a4
 
  • Major Detection Name : Trojan.Ransom.Matrix (ALYac), Ransom.Kovter (Symantec)
 
  • Encrypted File Pattern : <Original Filename>.<Original Extension>
 
  • Malicious File Creation Location :
     - C:\ProgramData\Microsoft\Windows\Start Menu\Programs\StartUp\<Random>.lnk
     - C:\Users\%UserName%\AppData\Local\Microsoft\<Random>.exe
     - C:\Users\%UserName%\AppData\Local\Temp\<Random>.exe
     - C:\Users\%UserName%\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\<Random>.lnk
     - C:\Users\%UserName%\AppData\Roaming\Microsoft\<Random>.exe
     - C:\Users\%UserName%\AppData\Roaming\<Random Foldername>
     - C:\Users\%UserName%\AppData\Roaming\<Random Foldername>\<Random>.cmd
     - C:\Users\%UserName%\AppData\Roaming\<Random Foldername>\<Random>.exe
     - C:\Users\%UserName%\AppData\Roaming\<Random>.hta
 
  • Payment Instruction File : <Random>.hta / WhatHappenedWithMyFiles.rtf / WhatHappenedWithMyFiles1.rtf ~ WhatHappenedWithMyFiles30.rtf
 
  • Major Characteristics :
     - Offline Encryption
     - Change the default values of the registry entry "HKEY_CLASSES_ROOT\mscfile\shell\open\command" and a ransomware execution using Event Viewer (eventvwr.exe)
     - Disable system restore (vssadmin.exe delete shadows /all /quiet, bcdedit.exe /set {default} recoveryenabled no, bcdedit.exe /set {default} bootstatuspolicy ignoreallfailures)

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