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MedusaLocker Ransomware (.locker16)

  • Distribution Method : Unknown
 
  • MD5 : 7905e07d83e158d505a5bf443b332cf0
 
  • Major Detection Name : Generic.Ransom.MedusaLocker.C9F3AC08 (BitDefender), Trojan-Ransom.Win32.Medusa.j (Kaspersky)
 
  • Encrypted File Pattern : .locker16
 
  • Malicious File Creation Location :
     - C:\Users\%UserName%\AppData\Roaming\svchostt.exe
     - C:\Windows\System32\Tasks\svchostt
 
  • Payment Instruction File : INFORMATION.html
 
  • Major Characteristics :
     - Offline Encryption
     - Turns off User Access Control (UAC)
     - Block processes execution (360se.exe, axlbridge.exe, Defwatch.exe, MsDtSrvr.exe, RAgui.exe, sqlservr.exe etc.)
     - Disable system restore (vssadmin.exe Delete Shadows /All /Quiet, bcdedit.exe /set {default} recoveryenabled No, bcdedit.exe /set {default} bootstatuspolicy ignoreallfailures, wbadmin DELETE SYSTEMSTATEBACKUP, wbadmin DELETE SYSTEMSTATEBACKUP -deleteOldest, wmic.exe SHADOWCOPY /nointeractive)
     - Adds svchostt to scheduler to execute "%AppData%\svchostt.exe" Every 15 minutes
     - EFI System Partition (X:\) and Recovery Partition (Y:\) drives are activate.

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