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Scarab Ransomware (.IMRTL)

  • Distribution Method : Unknown
 
  • MD5 : 67c91fe5663713c00849b5f04e9db257
 
  • Major Detection Name : Win32:DangerousSig [Trj] (Avast), Gen:Variant.Ransom.Amnesia.16 (BitDefender)
 
  • Encrypted File Pattern : .IMRTL
 
  • Malicious File Creation Location :
     - C:\Users\%UserName%\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\HOW TO RECOVER ENCRYPTED FILES.TXT
     - C:\Users\%UserName%\AppData\Roaming\wInn39j.exe
     - C:\Users\%UserName%\HOW TO RECOVER ENCRYPTED FILES.TXT
 
  • Payment Instruction File : HOW TO RECOVER ENCRYPTED FILES.TXT
 
  • Major Characteristics :
     - Offline Encryption
     - Amnesia / Scarabey Ransomware series
     - Use a "SELF CORPORATION LTD" Digital Signatures
     - Disable and Blocks Registry Editor (regedit.exe) and Task Manager (Taskmgr.exe)
     - Block processes execution (mysqld.exe, mysqld-nt.exe, mysqld-opt.exe, oracle.exe, sqlwriter.exe, steam.exe etc.)
     - Checks following folder name for encryption: Adobe, Archive, Backup, Firebird, Microsoft, Microsoft SQL Server, Microsoft SQL Server Compact Edition, MSSQL.1, Oracle, Reserv, Restore.
     - Disable system restore (wbadmin DELETE SYSTEMSTATEBACKUP -keepVersions:0, wmic SHADOWCOPY DELETE, vssadmin Delete Shadows /All /Quiet, bcdedit /set {default} recoveryenabled No, bcdedit /set {default} bootstatuspolicy ignoreallfailures)

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