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CrySis Ransomware (.id-<Random>.[Blammo@cock.li].arrow)

  • Distribution Method : Remote access through Remote Desktop Protocol(RDP) or Terminal Services
 
  • MD5 : 976b7508554b0e944a77716195df1f08
 
  • Major Detection Name : Trojan-Ransom.Win32.Crusis.ceb (Kaspersky), Ransom_Crusis.R039C0WCQ18 (Trend Micro)
 
  • Encrypted File Pattern : .id-<Random>.[Blammo@cock.li].arrow
 
  • 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\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 / Troldesh Ransomware series
     - Use an invalid "DevComponents" Digital Signatures
     - Disable system restore (vssadmin delete shadows /all /quiet)

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