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Check out our video library AppCheck defending against newest ransomware, automatic recovery and real-time backup.
- Distribution Method : Unknown
- MD5 : 4b5b80bd7f236a5f5099d8e241766821
- Major Detection Name : Trojan.Ransom.Stop (ALYac), a variant of Win32/Kryptik.GZJE (ESET)
- Encrypted File Pattern : .merl
- 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>\updatewin.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\bowsakkdestx.txt
- C:\Users\%UserName%\AppData\Local\script.ps1
- C:\Users\%UserName%\AppData\Roaming\Z12215595
- C:\Users\%UserName%\AppData\Roaming\Z12215595\<Random>.exe
- C:\Windows\System32\drivers\etc\hosts
- C:\Windows\System32\Tasks\Time Trigger Task
- Payment Instruction File : _readme.txt
- Major Characteristics :
- Create a fake "Windows Update" message
- Modifies Windows Host file (C:\Windows\System32\drivers\etc\hosts) to block security web sites.
- Disable and Blocks Task Manager (DisableTaskmgr)
- Disable Windows Defender (Set-MpPreference -DisableRealtimeMonitoring $true, "C:\Program Files\Windows Defender\mpcmdrun.exe" -removedefinitions -all)
- Reruns by adding "Time Trigger Task" in Task Scheduler to run "%LocalAppData%\<Random>-<Random>-<Random>-<Random>-<Random>\<Random>.exe --Task" for every 5 minutes.
- Generates additional AZORult malware (Info stealer)