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Matrix Ransomware (<Original Filename>.<Original Extension> / #_#WhatWrongWithMyFiles#_#.rtf)

  • Distribution Method : Automatic infection using exploit by visiting website
 
  • MD5 : 20dce31e370ec976ddeaa8c79d9278bf
 
  • Major Detection Name : Trojan-Ransom.Win32.Matrix.kb (Kaspersky), Ransom:Win32/Mytreex.A (Microsoft)
 
  • Encrypted File Pattern : <Original Filename>.<Original Extension>
 
  • Malicious File Creation Location :
         - 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 Folder>
         - C:\Users\%UserName%\AppData\Roaming\<Random>\<Random>.cmd
         - C:\Users\%UserName%\AppData\Roaming\<Random>\<Random>.exe
         - C:\Users\%UserName%\AppData\Roaming\<Random>.vbs
 
  • Payment Instruction File : #_#WhatWrongWithMyFiles#_#.rtf / #_#WhatWrongWithMyFiles#_#1.rtf ~ #_#WhatWrongWithMyFiles#_#50.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)
         - Changes desktop background (C:\Users\%UserName%\AppData\Roaming\<Random>.jpg)

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