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Magniber Ransomware (.hfsgvl)

  • Distribution Method : Automatic infection using exploit by visiting website
  • MD5 : 005332c172792d1598b0b3d9397b5f03
  • Major Detection Name : Trojan/Win32.Magniber.C2258729 (AhnLab V3), a variant of Win32/Kryptik.FYXU (ESET)
  • Encrypted File Pattern : .hfsgvl
  • Malicious File Creation Location :
         - C:\Users\%UserName%\AppData\Local\Temp\hfsgvl.exe
         - C:\Users\%UserName%\AppData\Local\Temp\READ_ME_FOR_DECRYPT.txt
         - C:\Users\%UserName%\Desktop\<Random>.exe
         - C:\Windows\System32\Tasks\hfsgvl
         - C:\Windows\System32\Tasks\<Random>
         - C:\Windows\System32\Tasks\<Random>1
  • Payment Instruction File : READ_ME_FOR_DECRYPT.txt
  • Major Characteristics :
         - Offline Encryption
         - Run only on Korean operating system
         - Disable system restore (wmic shadowcopy delete) using Event Viewer (eventvwr.exe)
         - Auto execute ransomware (pcalua.exe -a %Temp%\hfsgvl.exe) and payment instrucition file (%Temp%\READ_ME_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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