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CrySis Ransomware (.id-<Random>.[dcr@airmail.cc].combo)

  • Distribution Method : Remote access through Remote Desktop Protocol(RDP) or Terminal Services
 
  • MD5 : 846c17499d0b05d4b352aa36c979e349
 
  • Major Detection Name : a variant of Win32/Filecoder.Crysis.P (ESET), Ransom:Win32/Wadhrama (Microsoft)
 
  • Encrypted File Pattern : .id-<Random>.[dcr@airmail.cc].combo
 
  • 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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