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Trojan.Siggen32.63527
Added to the Dr.Web virus database:
2026-07-08
Virus description added:
2026-07-10
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'
Executes the following
'<SYSTEM32>\netsh.exe' advfirewall set allprofiles state off
Terminates or attempts to terminate
the following system processes:
%WINDIR%\systemapps\microsoft.windows.search_cw5n1h2txyewy\searchapp.exe
Modifies file system
Creates the following files
<Current directory>\cimgui.dll
<Current directory>\imgui.ini
%TEMP%\freefireth.png
%TEMP%\uidbypassdll.dll
Deletes the following system files
Deletes following files that it created itself
%TEMP%\content\3272-3944-powershell.exe-11-30-21-226.dump
%TEMP%\content\3272-3944-powershell.exe-11-30-21-667.dump
%TEMP%\content\3272-3944-powershell.exe-11-30-21-852.dump
%TEMP%\content\3272-3944-powershell.exe-11-30-22-105.dump
%TEMP%\content\3272-3944-powershell.exe-11-30-23-925.dump
%TEMP%\content\3460-1512-powershell.exe-11-29-48-330.dump
%TEMP%\content\3460-1512-powershell.exe-11-29-50-105.dump
%TEMP%\content\3460-1512-powershell.exe-11-29-50-505.dump
%TEMP%\content\3460-1512-powershell.exe-11-29-50-885.dump
%TEMP%\content\3460-1512-powershell.exe-11-29-54-244.dump
Modifies the following files
%LOCALAPPDATA%\packages\microsoft.windows.search_cw5n1h2txyewy\ac\microsoft\cryptneturlcache\metadata\77ec63bda74bd0d0e0426dc8f8008506
%LOCALAPPDATA%\packages\microsoft.windows.search_cw5n1h2txyewy\ac\microsoft\cryptneturlcache\metadata\57c8edb95df3f0ad4ee2dc2b8cfd4157
Network activity
Connects to
'x1.#.lencr.org':80
'ap#.msn.com':443
'localhost':49708
'se####.##dbypass.gtccheats.xyz':443
'x2.#.lencr.org':80
'ye.#.lencr.org':80
'ye#.#.lencr.org':80
TCP
HTTP GET requests
http://ctldl.windowsupdate.com/msdownload/update/v3/static/trustedr/en/disallowedcertstl.cab?56##############
http://ctldl.windowsupdate.com/msdownload/update/v3/static/trustedr/en/disallowedcertstl.cab?0f##############
http://x2.#.lencr.org/
http://ye.#.lencr.org/
http://ye#.#.lencr.org/86.crl
Other
'ra#.####ubusercontent.com':443
'ke##uth.win':443
'pa###bin.com':443
'ap#.msn.com':443
'localhost':49708
'localhost':49709
'se####.##dbypass.gtccheats.xyz':443
UDP
DNS ASK ra#.####ubusercontent.com
DNS ASK ke##uth.win
DNS ASK x1.#.lencr.org
DNS ASK pa###bin.com
DNS ASK ap#.msn.com
DNS ASK se####.##dbypass.gtccheats.xyz
DNS ASK x2.#.lencr.org
DNS ASK ye.#.lencr.org
DNS ASK ye#.#.lencr.org
Miscellaneous
Searches for the following windows
ClassName: '' WindowName: 'DESUS BYPASS'
Executes the following
'<SYSTEM32>\bcdedit.exe' /set disabledynamictick yes
'<SYSTEM32>\bcdedit.exe' /set useplatformtick yes
'<SYSTEM32>\ipconfig.exe' /flushdns
'<SYSTEM32>\netsh.exe' int tcp set global autotuninglevel=normal
'<SYSTEM32>\netsh.exe' int tcp set global chimney=enabled
'<SYSTEM32>\netsh.exe' int tcp set global dca=enabled
'<SYSTEM32>\netsh.exe' int tcp set global netdma=enabled
'<SYSTEM32>\powercfg.exe' /setactive 8c5e7fda-e8bf-4a96-9a85-a6e23a8c635c
'<SYSTEM32>\powercfg.exe' /setacvalueindex scheme_current sub_processor CPMINCORES 100
'<SYSTEM32>\powercfg.exe' /setacvalueindex scheme_current sub_processor CPMAXCORES 100
'<SYSTEM32>\cmd.exe' /c reg add "HKLM\Control\Session Manager\Memory Management" /v "LargeSystemCache" /t REG_DWORD /d 1 /f
'<SYSTEM32>\fsutil.exe' behavior set disablelastaccess 1
'<SYSTEM32>\sc.exe' stop DiagTrack
'<SYSTEM32>\sc.exe' stop WSearch
'<SYSTEM32>\sc.exe' stop SysMain
'<SYSTEM32>\sc.exe' stop Spooler
'<SYSTEM32>\cmd.exe' /c reg add "HKCU\System\GameConfigStore" /v "GameDVR_Enabled" /t REG_DWORD /d 0 /f
'<SYSTEM32>\cmd.exe' /c reg add "HKCU\Software\Microsoft\Windows\CurrentVersion\Themes\Personalize" /v "EnableTransparency" /t REG_DWORD /d 0 /f
'%WINDIR%\systemapps\microsoft.windows.search_cw5n1h2txyewy\searchapp.exe' -ServerName:CortanaUI.AppX8z9r6jm96hw4bsbneegw0kyxx296wr9t.mca
'<SYSTEM32>\reg.exe' add "HKCU\Software\Microsoft\Windows\CurrentVersion\Themes\Personalize" /v "EnableTransparency" /t REG_DWORD /d 0 /f
'<SYSTEM32>\reg.exe' add "HKCU\System\GameConfigStore" /v "GameDVR_Enabled" /t REG_DWORD /d 0 /f
'<SYSTEM32>\reg.exe' add "HKLM\Control\Session Manager\Memory Management" /v "LargeSystemCache" /t REG_DWORD /d 1 /f
'<SYSTEM32>\svchost.exe' -k appmodel -p -s camsvc
'<SYSTEM32>\bcdedit.exe' /set disabledynamictick yes' (with hidden window)
'<SYSTEM32>\bcdedit.exe' /set useplatformtick yes' (with hidden window)
'<SYSTEM32>\ipconfig.exe' /flushdns' (with hidden window)
'<SYSTEM32>\netsh.exe' int tcp set global autotuninglevel=normal' (with hidden window)
'<SYSTEM32>\netsh.exe' int tcp set global chimney=enabled' (with hidden window)
'<SYSTEM32>\netsh.exe' int tcp set global dca=enabled' (with hidden window)
'<SYSTEM32>\netsh.exe' int tcp set global netdma=enabled' (with hidden window)
'<SYSTEM32>\powercfg.exe' /setactive 8c5e7fda-e8bf-4a96-9a85-a6e23a8c635c' (with hidden window)
'<SYSTEM32>\powercfg.exe' /setacvalueindex scheme_current sub_processor CPMINCORES 100' (with hidden window)
'<SYSTEM32>\powercfg.exe' /setacvalueindex scheme_current sub_processor CPMAXCORES 100' (with hidden window)
'<SYSTEM32>\cmd.exe' /c reg add "HKLM\Control\Session Manager\Memory Management" /v "LargeSystemCache" /t REG_DWORD /d 1 /f' (with hidden window)
'<SYSTEM32>\fsutil.exe' behavior set disablelastaccess 1' (with hidden window)
'<SYSTEM32>\sc.exe' stop DiagTrack' (with hidden window)
'<SYSTEM32>\sc.exe' stop WSearch' (with hidden window)
'<SYSTEM32>\sc.exe' stop SysMain' (with hidden window)
'<SYSTEM32>\sc.exe' stop Spooler' (with hidden window)
'<SYSTEM32>\cmd.exe' /c reg add "HKCU\System\GameConfigStore" /v "GameDVR_Enabled" /t REG_DWORD /d 0 /f' (with hidden window)
'<SYSTEM32>\cmd.exe' /c reg add "HKCU\Software\Microsoft\Windows\CurrentVersion\Themes\Personalize" /v "EnableTransparency" /t REG_DWORD /d 0 /f' (with hidden window)
Curing recommendations
Windows
macOS
Linux
Android
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 .
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.
Use Dr.Web Anti-virus for macOS to run a full scan of your Mac.
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.
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.
Find out more about Dr.Web for Android
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