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Thanos Ransomware (.chaddad)

  • Distribution Method : Unknown
  • MD5 : dedad693898bba0e4964e6c9a749d380
  • Major Detection Name : HEUR:Trojan-Ransom.MSIL.Thanos.gen (Kaspersky), Ransom-Thanos!DEDAD693898B (McAfee)
  • Encrypted File Pattern : .chaddad
  • Malicious File Creation Location :
     - C:\Users\%UserName%\AppData\Local\Temp\<Random>.exe
     - C:\Users\%UserName%\AppData\Local\Temp\RESTORE_FILES_INFO.txt
     - C:\Users\%UserName%\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\reload1.lnk
  • Payment Instruction File : RESTORE_FILES_INFO.hta / RESTORE_FILES_INFO.txt
  • Major Characteristics :
     - Offline Encryption
     - Prometheus Ransomware series
     - Disable and Blocks Task Manager (DisableTaskMgr)
     - Allow Windows firewall rules ("netsh" advfirewall firewall set rule group=\"File and Printer Sharing\" new enable=Yes, "netsh" advfirewall firewall set rule group=\"Network Discovery\" new enable=Yes)
     - Disable Raccine ransomware protection ("taskkill" /F /IM RaccineSettings.exe, "reg" delete "HKCU\SOFTWARE\Microsoft\Windows\CurrentVersion\Run" /V "Raccine Tray" /F, "reg" delete HKCU\Software\Raccine /F, "schtasks" /DELETE /TN "Raccine Rules Updater" /F)
     - Block processes execution (excel.exe, mspub.exe, mydesktopservice.exe, ocautoupds.exe, thunderbird.exe, tmlisten.exe etc.)
     - Disable multi services ("sc.exe" config Dnscache start=auto, "sc.exe" config FDResPub start=auto, "sc.exe" config SQLTELEMETRY start=disabled, "sc.exe" config SQLTELEMETRY$ECWDB2 start=disabled, "sc.exe" config SQLWriter start=disabled, "sc.exe" config SSDPSRV start=auto, "sc.exe" config SstpSvc start=disabled, "sc.exe" config upnphost start=auto)
     - Disable system restore ("powershell.exe" & Get-WmiObject Win32_Shadowcopy | ForEach-Object { $_Delete(); })
     - Empty the trash ("cmd.exe" /c rd /s /q %SYSTEMDRIVE%\\$Recycle.bin)