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Xorist Ransomware (.ViPer)

  • Distribution Method : Unknown
 
  • MD5 : ab1cb52428dfe846a0ded82065a32d15
 
  • Major Detection Name : Trojan/Win32.Xorist.R25524 (AhnLab V3), Trojan-Ransom.Win32.Xorist.ln (Kaspersky)
 
  • Encrypted File Pattern : .ViPer
 
  • Malicious File Creation Location :
     - C:\Users\%UserName%\AppData\Local\Temp\w8BCSEUk15mVa16.exe
     - C:\Users\%UserName%\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\HOW TO DECRYPT FILES.txt
 
  • Payment Instruction File : HOW TO DECRYPT FILES.txt
 
  • Major Characteristics :
     - Offline Encryption
     - Boom / Xorist-Frozen Ransomware series
     - Changes desktop background (C:\Users\%UserName%\AppData\Local\Temp\<Random>.bmp)

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