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Serpent Ransomware (.srpx)

  • Distribution Method : Unknown
 
  • MD5 : 297291c54c14c195ec0fc204aba5a4f5
 
  • Major Detection Name : Ransom.Serpent (Malwarebytes), Ransom_HADESLOCK.FGW (Trend Micro)
 
  • Encrypted File Pattern : .srpx
 
  • Malicious File Creation Location :
     - C:\Users\%UserName%\AppData\Local\Temp\exdatpus.dat
     - C:\Users\%UserName%\AppData\Local\Temp\exdatpus.vbs
     - C:\Users\%UserName%\AppData\Local\Temp\cpy.vbs
     - C:\Users\%UserName%\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\exdatpus.vbs
 
  • Payment Instruction File : README_TO_RESTORE_FILES_<3 Digit Random>.html / README_TO_RESTORE_FILES_<3 Digit Random>.txt
 
  • Major Characteristics :
     - HadesLocker / WildFire Locker Ransomware series
     - Block processes execution (msftesql.exe, oracle.exe, sqlagent.exe, sqlbrowser.exe, sqlservr.exe, sqlwriter.exe etc.)
     - Disable system restore (WMIC.exe shadowcopy delete /nointeractive)
     - Interrupt file recovery using "C:\Windows\System32\cipher.exe" /W:<Drive Letter>

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