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Trojan.Siggen34.19086

Added to the Dr.Web virus database: 2026-09-23

Virus description added:

Technical Information

To ensure autorun and distribution
Modifies the following registry keys
  • [HKLM\SYSTEM\CurrentControlSet\Control\Session Manager] 'BootExecute' = ''
Malicious functions
To complicate detection of its presence in the operating system,
blocks execution of the following system utilities:
  • Windows Defender
blocks the following features:
  • User Account Control (UAC)
Executes the following
  • '%WINDIR%\syswow64\taskkill.exe' /im iexplore.exe /f
  • '%WINDIR%\syswow64\taskkill.exe' /im msedge.exe /f
Modifies file system
Creates the following files
  • %TEMP%\nsuodo.dll
  • <Current directory>\gp.inf
  • %WINDIR%\security\logs\scesrv.log
  • <Current directory>\gp.jfm
  • <Current directory>\gp.sdb
  • %LOCALAPPDATA%\microsoft\edge\user data\browsermetrics\browsermetrics-6ab487e2-b50.pma
  • %LOCALAPPDATA%\microsoft\edge\user data\browsermetrics\browsermetrics-6ab487f1-990.pma
Sets the 'hidden' attribute to the following files
  • %TEMP%\nsuodo.dll
  • <Current directory>\gp.inf
Deletes the following system files
  • %WINDIR%\panther\unattend.xml
Deletes following files that it created itself
  • %LOCALAPPDATA%\microsoft\windows\<INETFILES>\ie\6z5ae6bt\v1[1].xml
  • <Current directory>\gp.inf
Moves the following system files
  • from %WINDIR%\security\database\edb.log to %WINDIR%\security\database\edb00001.log
Modifies the following files
  • %LOCALAPPDATA%\microsoft\edge\user data\last version
  • %LOCALAPPDATA%\microsoft\edge\user data\default\sync data\leveldb\log
  • %LOCALAPPDATA%\microsoft\edge\user data\default\sync data\leveldb\000003.log
  • %LOCALAPPDATA%\microsoft\edge\user data\default\site characteristics database\log
  • %LOCALAPPDATA%\microsoft\tokenbroker\cache\9cd93bc6dcf544bae69531052e64647ec02f2bb4.tbres
Substitutes the following files
  • %LOCALAPPDATA%\Microsoft\Edge\User Data\Default\Platform Notifications\LOG
  • %LOCALAPPDATA%\Microsoft\Edge\User Data\Default\Local Storage\leveldb\LOG
Network activity
Connects to
  • 'co####.edge.skype.com':443
TCP
Other
  • 'co####.edge.skype.com':443
UDP
  • DNS ASK co####.edge.skype.com
Miscellaneous
Searches for the following windows
  • ClassName: 'Chrome_MessageWindow' WindowName: '%LOCALAPPDATA%\Microsoft\Edge\User Data'
  • ClassName: 'MS_AutodialMonitor' WindowName: ''
  • ClassName: 'MS_WebCheckMonitor' WindowName: ''
Executes the following
  • '%ProgramFiles%\internet explorer\iexplore.exe'
  • '<SYSTEM32>\cmd.exe' /c bcdedit /set testsigning off
  • '<SYSTEM32>\bcdedit.exe' /set testsigning off
  • '<SYSTEM32>\cmd.exe' /c bcdedit /set nointegritychecks on
  • '<SYSTEM32>\bcdedit.exe' /set nointegritychecks on
  • '<SYSTEM32>\cmd.exe' /c bcdedit /set hypervisorlaunchtype off
  • '<SYSTEM32>\bcdedit.exe' /set hypervisorlaunchtype off
  • '%WINDIR%\syswow64\cmd.exe' /c secedit /configure /db gp.sdb /cfg gp.inf
  • '%ProgramFiles(x86)%\microsoft\edge\application\89.0.774.68\bho\ie_to_edge_stub.exe' --from-ie-to-edge=3 --ie-frame-hwnd=80046
  • '%WINDIR%\syswow64\secedit.exe' /configure /db gp.sdb /cfg gp.inf
  • '%ProgramFiles(x86)%\microsoft\edge\application\msedge.exe' --from-ie-to-edge=3 --ie-frame-hwnd=80046
  • '%ProgramFiles(x86)%\microsoft\edge\application\msedge.exe' --from-ie-to-edge=3 --ie-frame-hwnd=80046 --flag-switches-begin --flag-switches-end --do-not-de-elevate
  • '%WINDIR%\syswow64\cmd.exe' /c net accounts /maxpwage:UNLIMITED
  • '%WINDIR%\syswow64\net.exe' accounts /maxpwage:UNLIMITED
  • '%WINDIR%\syswow64\net1.exe' accounts /maxpwage:UNLIMITED
  • '%WINDIR%\syswow64\cmd.exe' /c del /f /s /q gp.*
  • '%WINDIR%\syswow64\cmd.exe' /c powercfg /list
  • '%WINDIR%\syswow64\powercfg.exe' /list
  • '%WINDIR%\syswow64\cmd.exe' /c powercfg /DUPLICATESCHEME e9a42b02-d5df-448d-aa00-03f14749eb61
  • '%WINDIR%\syswow64\powercfg.exe' /DUPLICATESCHEME e9a42b02-d5df-448d-aa00-03f14749eb61
  • '<SYSTEM32>\cmd.exe' /c powercfg -h off
  • '<SYSTEM32>\powercfg.exe' -h off
  • '<SYSTEM32>\cmd.exe' /c powercfg /change /standby-timeout-ac 0
  • '<SYSTEM32>\powercfg.exe' /change /standby-timeout-ac 0
  • '<SYSTEM32>\cmd.exe' /c powercfg /change /standby-timeout-dc 0
  • '<SYSTEM32>\powercfg.exe' /change /standby-timeout-dc 0
  • '<SYSTEM32>\cmd.exe' /c powercfg /change /monitor-timeout-ac 0
  • '<SYSTEM32>\powercfg.exe' /change /monitor-timeout-ac 0
  • '<SYSTEM32>\cmd.exe' /c powercfg /change /monitor-timeout-dc 0
  • '<SYSTEM32>\powercfg.exe' /change /monitor-timeout-dc 0
  • '<SYSTEM32>\cmd.exe' /c powercfg /change /disk-timeout-ac 0
  • '<SYSTEM32>\powercfg.exe' /change /disk-timeout-ac 0
  • '<SYSTEM32>\cmd.exe' /c powercfg /change /disk-timeout-dc 0
  • '<SYSTEM32>\powercfg.exe' /change /disk-timeout-dc 0
  • '<SYSTEM32>\cmd.exe' /c powercfg /change /hibernate-timeout-ac 0
  • '<SYSTEM32>\powercfg.exe' /change /hibernate-timeout-ac 0
  • '<SYSTEM32>\cmd.exe' /c powercfg /change /hibernate-timeout-dc 0
  • '<SYSTEM32>\powercfg.exe' /change /hibernate-timeout-dc 0
  • '<SYSTEM32>\cmd.exe' /c powercfg /SETACVALUEINDEX SCHEME_CURRENT 2a737441-1930-4402-8d77-b2bebba308a3 48e6b7a6-50f5-4782-a5d4-53bb8f07e226 0
  • '<SYSTEM32>\powercfg.exe' /SETACVALUEINDEX SCHEME_CURRENT 2a737441-1930-4402-8d77-b2bebba308a3 48e6b7a6-50f5-4782-a5d4-53bb8f07e226 0
  • '<SYSTEM32>\cmd.exe' /c powercfg /SETDCVALUEINDEX SCHEME_CURRENT 2a737441-1930-4402-8d77-b2bebba308a3 48e6b7a6-50f5-4782-a5d4-53bb8f07e226 0
  • '<SYSTEM32>\powercfg.exe' /SETDCVALUEINDEX SCHEME_CURRENT 2a737441-1930-4402-8d77-b2bebba308a3 48e6b7a6-50f5-4782-a5d4-53bb8f07e226 0
  • '<SYSTEM32>\cmd.exe' /c bcdedit /set {current} bootstatuspolicy ignoreallfailures
  • '<SYSTEM32>\bcdedit.exe' /set {current} bootstatuspolicy ignoreallfailures
  • '<SYSTEM32>\cmd.exe' /c bcdedit /set useplatformclock no
  • '<SYSTEM32>\bcdedit.exe' /set useplatformclock no
  • '<SYSTEM32>\cmd.exe' /c bcdedit /set useplatformtick no
  • '<SYSTEM32>\bcdedit.exe' /set useplatformtick no
  • '<SYSTEM32>\cmd.exe' /c bcdedit /set disabledynamictick yes
  • '<SYSTEM32>\bcdedit.exe' /set disabledynamictick yes
  • '<SYSTEM32>\cmd.exe' /c netsh interface teredo set state disable
  • '<SYSTEM32>\netsh.exe' interface teredo set state disable
  • '<SYSTEM32>\cmd.exe' /c netsh interface 6to4 set state disabled
  • '<SYSTEM32>\netsh.exe' interface 6to4 set state disabled
  • '<SYSTEM32>\cmd.exe' /c netsh interface isatap set state disabled
  • '<SYSTEM32>\netsh.exe' interface isatap set state disabled
  • '<SYSTEM32>\cmd.exe' /c netsh int tcp set global ecn=disable
  • '<SYSTEM32>\netsh.exe' int tcp set global ecn=disable
  • '<SYSTEM32>\cmd.exe' /cnetcfg.exe -u ms_pacer
  • '<SYSTEM32>\netcfg.exe' -u ms_pacer
  • '%WINDIR%\syswow64\rundll32.exe' iesetup.dll,IEHardenUser
  • '%WINDIR%\syswow64\rundll32.exe' iesetup.dll,IEHardenAdmin
  • '%WINDIR%\syswow64\rundll32.exe' iesetup.dll,IEHardenMachineNow
  • '%WINDIR%\syswow64\cmd.exe' /c echo >> <DRIVERS>\etc\hosts
  • '%WINDIR%\syswow64\cmd.exe' /c echo 127.0.0.1 ieonline.microsoft.com >> <DRIVERS>\etc\hosts
  • '%WINDIR%\syswow64\cmd.exe' /c del /f /s /q C:\PerfLogs\*.*
  • '%WINDIR%\syswow64\cmd.exe' /c del /f /s /q C:\recycled\*.*
  • '%WINDIR%\syswow64\cmd.exe' /c del /f /s /q %WINDIR%\Temp\*.*
  • '%WINDIR%\syswow64\cmd.exe' /c del /f /s /q %WINDIR%\Tasks\Real*.job
  • '%WINDIR%\syswow64\cmd.exe' /c del /f /s /q %WINDIR%\Prefetch\*.*
  • '%WINDIR%\syswow64\cmd.exe' /c del /f /s /q %WINDIR%\Prefetch\ReadyBoot\*.*
  • '%WINDIR%\syswow64\cmd.exe' /c del /f /s /q <SYSTEM32>\WDI\LogFiles\*.*
  • '%WINDIR%\syswow64\cmd.exe' /c del /f /s /q %WINDIR%\Logs\dosvc\*.*
  • '%ProgramFiles%\internet explorer\iexplore.exe' ' (with hidden window)
  • '<SYSTEM32>\cmd.exe' /c bcdedit /set testsigning off' (with hidden window)
  • '<SYSTEM32>\cmd.exe' /c bcdedit /set nointegritychecks on' (with hidden window)
  • '<SYSTEM32>\cmd.exe' /c bcdedit /set hypervisorlaunchtype off' (with hidden window)
  • '%WINDIR%\syswow64\cmd.exe' /c secedit /configure /db gp.sdb /cfg gp.inf' (with hidden window)
  • '%ProgramFiles(x86)%\microsoft\edge\application\msedge.exe' --from-ie-to-edge=3 --ie-frame-hwnd=80046 --flag-switches-begin --flag-switches-end --do-not-de-elevate' (with hidden window)
  • '%WINDIR%\syswow64\cmd.exe' /c net accounts /maxpwage:UNLIMITED' (with hidden window)
  • '%WINDIR%\syswow64\cmd.exe' /c del /f /s /q gp.*' (with hidden window)
  • '%WINDIR%\syswow64\cmd.exe' /c powercfg /list' (with hidden window)
  • '%WINDIR%\syswow64\cmd.exe' /c powercfg /DUPLICATESCHEME e9a42b02-d5df-448d-aa00-03f14749eb61' (with hidden window)
  • '<SYSTEM32>\cmd.exe' /c powercfg -h off' (with hidden window)
  • '<SYSTEM32>\cmd.exe' /c powercfg /change /standby-timeout-ac 0' (with hidden window)
  • '<SYSTEM32>\cmd.exe' /c powercfg /change /standby-timeout-dc 0' (with hidden window)
  • '<SYSTEM32>\cmd.exe' /c powercfg /change /monitor-timeout-ac 0' (with hidden window)
  • '<SYSTEM32>\cmd.exe' /c powercfg /change /monitor-timeout-dc 0' (with hidden window)
  • '<SYSTEM32>\cmd.exe' /c powercfg /change /disk-timeout-ac 0' (with hidden window)
  • '<SYSTEM32>\cmd.exe' /c powercfg /change /disk-timeout-dc 0' (with hidden window)
  • '<SYSTEM32>\cmd.exe' /c powercfg /change /hibernate-timeout-ac 0' (with hidden window)
  • '<SYSTEM32>\cmd.exe' /c powercfg /change /hibernate-timeout-dc 0' (with hidden window)
  • '<SYSTEM32>\cmd.exe' /c powercfg /SETACVALUEINDEX SCHEME_CURRENT 2a737441-1930-4402-8d77-b2bebba308a3 48e6b7a6-50f5-4782-a5d4-53bb8f07e226 0' (with hidden window)
  • '<SYSTEM32>\cmd.exe' /c powercfg /SETDCVALUEINDEX SCHEME_CURRENT 2a737441-1930-4402-8d77-b2bebba308a3 48e6b7a6-50f5-4782-a5d4-53bb8f07e226 0' (with hidden window)
  • '<SYSTEM32>\cmd.exe' /c bcdedit /set {current} bootstatuspolicy ignoreallfailures' (with hidden window)
  • '<SYSTEM32>\cmd.exe' /c bcdedit /set useplatformclock no' (with hidden window)
  • '<SYSTEM32>\cmd.exe' /c bcdedit /set useplatformtick no' (with hidden window)
  • '<SYSTEM32>\cmd.exe' /c bcdedit /set disabledynamictick yes' (with hidden window)
  • '<SYSTEM32>\cmd.exe' /c netsh interface teredo set state disable' (with hidden window)
  • '<SYSTEM32>\cmd.exe' /c netsh interface 6to4 set state disabled' (with hidden window)
  • '<SYSTEM32>\cmd.exe' /c netsh interface isatap set state disabled' (with hidden window)
  • '<SYSTEM32>\cmd.exe' /c netsh int tcp set global ecn=disable' (with hidden window)
  • '<SYSTEM32>\cmd.exe' /cnetcfg.exe -u ms_pacer' (with hidden window)
  • '%WINDIR%\syswow64\taskkill.exe' /im iexplore.exe /f' (with hidden window)
  • '%WINDIR%\syswow64\taskkill.exe' /im msedge.exe /f' (with hidden window)
  • '%WINDIR%\syswow64\rundll32.exe' iesetup.dll,IEHardenUser' (with hidden window)
  • '%WINDIR%\syswow64\rundll32.exe' iesetup.dll,IEHardenAdmin' (with hidden window)
  • '%WINDIR%\syswow64\rundll32.exe' iesetup.dll,IEHardenMachineNow' (with hidden window)
  • '%WINDIR%\syswow64\cmd.exe' /c del /f /s /q C:\PerfLogs\*.*' (with hidden window)
  • '%WINDIR%\syswow64\cmd.exe' /c del /f /s /q C:\recycled\*.*' (with hidden window)
  • '%WINDIR%\syswow64\cmd.exe' /c del /f /s /q %WINDIR%\Temp\*.*' (with hidden window)
  • '%WINDIR%\syswow64\cmd.exe' /c del /f /s /q %WINDIR%\Tasks\Real*.job' (with hidden window)
  • '%WINDIR%\syswow64\cmd.exe' /c del /f /s /q %WINDIR%\Prefetch\*.*' (with hidden window)
  • '%WINDIR%\syswow64\cmd.exe' /c del /f /s /q %WINDIR%\Prefetch\ReadyBoot\*.*' (with hidden window)
  • '%WINDIR%\syswow64\cmd.exe' /c del /f /s /q <SYSTEM32>\WDI\LogFiles\*.*' (with hidden window)
  • '%WINDIR%\syswow64\cmd.exe' /c del /f /s /q %WINDIR%\Logs\dosvc\*.*' (with hidden window)

Curing recommendations

  1. If the operating system (OS) can be loaded (either normally or in safe mode), download Dr.Web Security Space and run a full scan of your computer and removable media you use. More about Dr.Web Security Space.
  2. If you cannot boot the OS, change the BIOS settings to boot your system from a CD or USB drive. Download the image of the emergency system repair disk Dr.Web® LiveDisk , mount it on a USB drive or burn it to a CD/DVD. After booting up with this media, run a full scan and cure all the detected threats.
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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:
    • Load your smartphone or tablet in the safe mode (depending on the operating system version and specifications of the particular mobile device involved, this procedure can be performed in various ways; seek clarification from the user guide that was shipped with the device, or contact its manufacturer);
    • Once you have activated safe mode, install the Dr.Web for Android onto the infected handheld and run a full scan of the system; follow the steps recommended for neutralizing the threats that have been detected;
    • Switch off your device and turn it on as normal.

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