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CrySis Ransomware (.id-<Random>.[Enigma1crypt@aol.com].ETH)

  • Distribution Method : Download the file via a link included in the email message
 
  • MD5 : d35fa59ce558fe08955ce0e807ce07d0
 
  • Major Detection Name : Win32/Filecoder.Crysis.P (ESET), Troj/Ransom-FKA (Sophos)
 
  • Encrypted File Pattern : .id-<Random>.[Enigma1crypt@aol.com].ETH
 
  • Malicious File Creation Location :
     - C:\ProgramData\Microsoft\Windows\Start Menu\Programs\Startup\Info.hta
     - C:\ProgramData\Microsoft\Windows\Start Menu\Programs\StartUp\taskhost.exe
     - C:\Users\%UserName%\AppData\Local\Temp\eset
     - C:\Users\%UserName%\AppData\Local\Temp\eset\bts
     - C:\Users\%UserName%\AppData\Local\Temp\eset\bts.session
     - C:\Users\%UserName%\AppData\Local\Temp\Defender_nt32_enu.exe
     - C:\Users\%UserName%\AppData\Local\Temp\Help.exe
     - C:\Users\%UserName%\AppData\Local\Temp\taskhost.exe
     - C:\Users\%UserName%\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\Info.hta
     - C:\Users\%UserName%\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\taskhost.exe
     - C:\Users\%UserName%\AppData\Roaming\Info.hta
     - C:\Users\%UserName%\AppData\Roaming\taskhost.exe
     - C:\Users\%UserName%\Desktop\FILES ENCRYPTED.txt
     - C:\Users\Public\Desktop\FILES ENCRYPTED.txt
     - C:\Windows\System32\Info.hta
     - C:\Windows\System32\taskhost.exe
     - <Drive Letter>:\FILES ENCRYPTED.txt
 
  • Payment Instruction File : FILES ENCRYPTED.txt / Info.hta
 
  • Major Characteristics :
     - Offline Encryption
     - Dharma / Phobos Ransomware series
     - Disguised as execution of running "ESET AV Remover"
     - Block processes execution (mysqld.exe, mysqld-nt.exe, outlook.exe, postgres.exe, sqlservr.exe etc.)
     - Stop multi services (mssqlserver, sqlserveradhelper, sqlwriter etc.)
     - Disable system restore (vssadmin delete shadows /all /quiet)

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