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CrySis Ransomware (.id-<Random>.[paydecryption@qq.com].brrr)

  • Distribution Method : Remote access through Remote Desktop Protocol(RDP) or Terminal Services
 
  • MD5 : 2bde9be34db465ae2a8709aae4f0a9ad
 
  • Major Detection Name : Trojan/Win32.Crysis.C2720563 (AhnLab V3), Trojan.Ransom.Crysis.G (BitDefender)
 
  • Encrypted File Pattern : .id-<Random>.[paydecryption@qq.com].brrr
 
  • Malicious File Creation Location :
     - C:\ProgramData\Microsoft\Windows\Start Menu\Programs\Startup\<Random>.exe
     - C:\ProgramData\Microsoft\Windows\Start Menu\Programs\Startup\Info.hta
     - C:\Users\%UserName%\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\<Random>.exe
     - C:\Users\%UserName%\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\Info.hta
     - C:\Users\%UserName%\AppData\Roaming\<Random>.exe
     - C:\Users\%UserName%\AppData\Roaming\Info.hta
     - C:\Windows\System32\<Random>.exe
     - C:\Windows\System32\Info.hta
 
  • Payment Instruction File : FILES ENCRYPTED.txt / Info.hta
 
  • Major Characteristics :
     - Offline Encryption
     - Dharma Ransomware series
     - Block processes execution (mysqld.exe, mysqld-nt.exe, outlook.exe, postgres.exe, sqlservr.exe etc.)
     - Disable system restore (vssadmin delete shadows /all /quiet)

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