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Check out our video library AppCheck defending against newest ransomware, automatic recovery and real-time backup.

  • Distribution Method : Automatic infection using exploit by visiting website
 
  • MD5 : 051ec45dd9fdaf280f54c4d498ae1dbc
 
  • Major Detection Name : a variant of Win32/Kryptik.GAKY (ESET), Trojan.Win32.Ransom.128512.A (ViRobot)
 
  • Encrypted File Pattern : .bciheah
 
  • Malicious File Creation Location :
         - C:\Users\%UserName%\AppData\Local\READ_FOR_DECRYPT.txt
         - C:\Users\%UserName%\AppData\Local\bciheah.exe
         - C:\Users\%UserName%\Desktop\<Random>.exe
         - C:\Windows\System32\Tasks\bciheah
         - C:\Windows\System32\Tasks\<Random>
         - C:\Windows\System32\Tasks\<Random>1
 
  • Payment Instrucition File : READ_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 %LocalAppData%\bciheah.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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