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Check out our video library AppCheck defending against newest ransomware, automatic recovery and real-time backup.

  • Distribution Method : Unknown
 
  • MD5 : e23b1a5420801506b8e3a4aaada420a1
 
  • Major Detection Name : Trojan-Ransom.Win32.Stop.bl (Kaspersky), Ransom:Win32/Sodinokibi.F (Microsoft)
 
  • Encrypted File Pattern : .gehad
 
  • Malicious File Creation Location :
     - C:\SystemID
     - C:\SystemID\PersonalID.txt
     - C:\Users\%UserName%\AppData\Local\<Random>-<Random>-<Random>-<Random>-<Random>
     - C:\Users\%UserName%\AppData\Local\<Random>-<Random>-<Random>-<Random>-<Random>\5.exe
     - C:\Users\%UserName%\AppData\Local\<Random>-<Random>-<Random>-<Random>-<Random>\updatewin1.exe
     - C:\Users\%UserName%\AppData\Local\<Random>-<Random>-<Random>-<Random>-<Random>\updatewin2.exe
     - C:\Users\%UserName%\AppData\Local\<Random>-<Random>-<Random>-<Random>-<Random>\<Random>.exe
     - C:\Users\%UserName%\AppData\Local\Temp\MpCmdRun.log
     - C:\Users\%UserName%\AppData\Local\script.ps1
     - C:\Windows\System32\drivers\etc\hosts
     - C:\Windows\System32\Tasks\Time Trigger Task
 
  • Payment Instruction File : _readme.txt
 
  • Major Characteristics :
     - Offline Encryption
     - Windows Host 파일(C:\Windows\System32\drivers\etc\hosts) 수정을 통한 보안 관련 사이트 접속 차단
     - 작업 관리자 무력화(DisableTaskmgr)
     - Windows Defender 무력화(Set-MpPreference -DisableRealtimeMonitoring $true, "C:\Program Files\Windows Defender\mpcmdrun.exe" -removedefinitions -all)
     - "Time Trigger Task" 작업 스케줄러 등록값을 통해 5분 단위로 "%LocalAppData%\<Random>-<Random>-<Random>-<Random>-<Random>\<Random>.exe --Task" 랜섬웨어 재실행
     - 정보 탈취형 AZORult 악성코드 추가 설치

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