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Buran Ransomware (.{<Random>-<Random>-<Random>-<Random>-<Random>})

  • Distribution Method : Unknown
 
  • MD5 : 9f040ff12f83a945c330cb8751f62cc3
 
  • Encrypted File Pattern : .{<Random>-<Random>-<Random>-<Random>-<Random>}
 
  • Malicious File Creation Location :
     - C:\Users\%UserName%\AppData\Local\Temp\<Random>.buran
     - C:\Users\%UserName%\AppData\Roaming\Microsoft\Windows\lsass.exe
     - C:\Users\%UserName%\Desktop\!!! YOUR FILES ARE ENCRYPTED !!!.TXT
 
  • Payment Instruction File : !!! YOUR FILES ARE ENCRYPTED !!!.TXT
 
  • Major Characteristics :
     - Offline Encryption
     - VegaLocker Ransomware series
     - Disable system restore (bcdedit /set {default} bootstatuspolicy ignoreallfailures, bcdedit /set {default} recoveryenabled no, wbadmin delete catalog -quiet, wbadmin delete systemstatebackup, wbadmin delete systemstatebackup -keepversions:0, wbadmin delete backup, wmic shadowcopy delete, vssadmin delete shadows /all /quiet)
     - Initializing the Terminal Server Client Registry (reg delete "HKEY_CURRENT_USER\Software\Microsoft\Terminal Server Client\Default" /va /f, reg delete "HKEY_CURRENT_USER\Software\Microsoft\Terminal Server Client\Servers" /f, reg add "HKEY_CURRENT_USER\Software\Microsoft\Terminal Server Client\Servers")
     - Deletes event log (wevtutil.exe clear-log Application, wevtutil.exe clear-log Security, wevtutil.exe clear-log System, sc config eventlog start=disabled)

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