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Magniber Ransomware (.ypail)

  • Distribution Method : Automatic infection using exploit by visiting website
  • MD5 : d410ad89fe5e0350e648ac39308fd848
  • Major Detection Name : Trojan/Win32.Magniber.R215116 (AhnLab V3), Trojan.Win32.MyRansom.131072 (ViRobot)
  • Encrypted File Pattern : .ypail
  • Malicious File Creation Location :
         - C:\Users\%UserName%\AppData\Local\READ_FOR_DECRYPT.txt
         - C:\Users\%UserName%\AppData\Local\ypail.exe
         - C:\Users\%UserName%\Desktop\<Random>.exe
         - C:\Windows\System32\Tasks\ypail
         - C:\Windows\System32\Tasks\<Random>
         - C:\Windows\System32\Tasks\<Random>1
  • Payment Instruction File : READ_ME_FOR_DECRYPT.txt
  • Major Characteristics :
         - Offline Encryption
         - Only run on Korean operating system
         - Change the default values of the registry entry "HKEY_CLASSES_ROOT\mscfile\shell\open\command" and disable system restore (wmic shadowcopy delete) using Event Viewer (eventvwr.exe)
         - Auto execute ransomware (pcalua.exe -a C:\Users\%UserName%\AppData\Local\ypail.exe -c <Random>) and payment instrucition file (%LocalAppData%\READ_FOR_DECRYPT.txt) every 15 minutes by adding Task Scheduler entries
         - Auto connect MY DECRYPTOR site (cmd.exe /c start iexplore http://<URL>) every a hour by adding Task Scheduler entries

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