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CRBR Encryptor Ransomware (_HOW_TO_DECRYPT_MY_FILES_<Random>_.hta / .txt)

  • Distribution Method : Automatic infection using exploit by visiting website
 
  • MD5 : 23cc4e3bce235ec01c5442b6d27724f1
 
  • Major Detection Name : Win32.Trojan-Ransom.Cerber.4L49N5 (GData), Ransom.Cerber (Norton)
 
  • Encrypted File Pattern : <Random Filename>.<4 Digits Random Extension>
 
  • Malicious File Creation Location :
         - C:\Users\%UserName%\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\<Random>.lnk
         - C:\Users\%UserName%\Desktop\<Random>.exe
         - C:\Windows\SysWOW64\<Random>.exe
 
  • Payment Instruction File : _HOW_TO_DECRYPT_MY_FILES_<Random>_.hta / _HOW_TO_DECRYPT_MY_FILES_<Random>_.txt
 
  • Major Characteristics :
         - Offline Encryption
         - Cerber Ransomware series
         - Target files encrypted starting from offset Offset 0x800
         - Generates payment instrucition files in 13 languages including Korean and English
         - Changes desktop background (C:\Users\%UserName%\AppData\Local\Temp\tmp<Random>.bmp)

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