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Trojan.Siggen18.59862
Added to the Dr.Web virus database:
2022-10-16
Virus description added:
2022-10-18
Technical Information
To ensure autorun and distribution
Modifies the following registry keys
[<HKLM>\Software\Wow6432Node\Microsoft\Windows\CurrentVersion\Run] 'ssms' = '%WINDIR%\ssms.exe'
[<HKLM>\Software\Classes\batfile\shell\Open\command] '' = 'logoff.exe'
[<HKLM>\SOFTWARE\Wow6432Node\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\avid.exe] 'Debugger' = 'cmd.exe /c del /a /f'
[<HKLM>\SOFTWARE\Wow6432Node\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\ansavd.exe] 'Debugger' = 'cmd.exe /c del /a /f'
[<HKLM>\SOFTWARE\Wow6432Node\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\ansavgd.exe] 'Debugger' = 'cmd.exe /c del /a /f'
[<HKLM>\SOFTWARE\Wow6432Node\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\HijackThis.exe] 'Debugger' = 'cmd.exe /c del /a /f'
[<HKLM>\SOFTWARE\Wow6432Node\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\boot.exe] 'Debugger' = 'cmd.exe /c del /a /f'
[<HKLM>\SOFTWARE\Wow6432Node\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\regedit.exe] 'Debugger' = 'rundll32.exe'
[<HKLM>\SOFTWARE\Wow6432Node\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\regedt32.exe] 'Debugger' = 'rundll32.exe'
[<HKLM>\SOFTWARE\Wow6432Node\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\taskmgr.exe] 'Debugger' = 'rundll32.exe'
[<HKLM>\SOFTWARE\Wow6432Node\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\mmc.exe] 'Debugger' = 'rundll32.exe'
[<HKLM>\SOFTWARE\Wow6432Node\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\rstrui.exe] 'Debugger' = 'rundll32.exe'
[<HKLM>\SOFTWARE\Wow6432Node\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\wscript.exe] 'Debugger' = 'rundll32.exe'
[<HKLM>\SOFTWARE\Wow6432Node\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\cscript.exe] 'Debugger' = 'rundll32.exe'
[<HKLM>\SOFTWARE\Wow6432Node\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\tasklist.exe] 'Debugger' = 'rundll32.exe'
Creates or modifies the following files
Creates the following files on removable media
<Drive name for removable media>:\flash_setup.exe
<Drive name for removable media>:\facebook\pencuri login.exe
<Drive name for removable media>:\facebook\password cracker.exe
<Drive name for removable media>:\facebook\autobot setup.exe
<Drive name for removable media>:\facebook\auto invite.exe
<Drive name for removable media>:\facebook\cheaters.exe
Malicious functions
To complicate detection of its presence in the operating system,
forces the system hide from view:
blocks execution of the following system utilities:
Command Prompt (CMD)
Windows Task Manager (Taskmgr)
Registry Editor (RegEdit)
Windows Defender
blocks the following features:
System Restore (SR)
User Account Control (UAC)
Windows Security Center
Executes the following
'%WINDIR%\syswow64\taskkill.exe' /f /im SmΔRTP.exe
'%WINDIR%\syswow64\taskkill.exe' /f /fi "modules eq msvbvm60.dll" /fi "imagename ne ssms.exe" /fi "imagename ne Sab0tagE.exe" /fi "imagename ne explorer.exe" /fi "imagename ne ssms.exe"
'%WINDIR%\syswow64\taskkill.exe' /f /fi "windowtitle eq process*"
'%WINDIR%\syswow64\taskkill.exe' /f /fi "modules eq iscan.dll"
'%WINDIR%\syswow64\taskkill.exe' /f /fi "modules eq rtpsvc.dll"
'%WINDIR%\syswow64\taskkill.exe' /f /fi "modules eq RegistryFX.dll"
'%WINDIR%\syswow64\taskkill.exe' /f /fi "modules eq rtpscan.dll"
Modifies file system
Creates the following files
C:\flash_setup.exe
D:\flash_setup.exe
%WINDIR%\ssms.exe
%WINDIR%\temp\~df9a8c8b00341233b6.tmp
%WINDIR%\syswow64\sab0tage.exe
%WINDIR%\temp\~df107e4a7dbdeaa4aa.tmp
Sets the 'hidden' attribute to the following files
Deletes the following files
%WINDIR%\temp\~df107e4a7dbdeaa4aa.tmp
Modifies the HOSTS file.
Miscellaneous
Searches for the following windows
ClassName: '' WindowName: ''
Creates and executes the following
'%WINDIR%\ssms.exe'
'%WINDIR%\syswow64\sab0tage.exe'
'%WINDIR%\syswow64\cacls.exe' "%WINDIR%" /p everyone:f /e' (with hidden window)
'%WINDIR%\syswow64\cacls.exe' "%WINDIR%" /p everyone:n /e' (with hidden window)
'%WINDIR%\syswow64\schtasks.exe' /create /sc onstart /tn ssms /tr "%WINDIR%\ssms.exe" /ru System' (with hidden window)
'%WINDIR%\syswow64\schtasks.exe' /run /tn ssms' (with hidden window)
'%WINDIR%\ssms.exe' ' (with hidden window)
'%WINDIR%\syswow64\sab0tage.exe' ' (with hidden window)
'%WINDIR%\syswow64\taskkill.exe' /f /im SmΔRTP.exe' (with hidden window)
'%WINDIR%\syswow64\taskkill.exe' /f /fi "modules eq msvbvm60.dll" /fi "imagename ne ssms.exe" /fi "imagename ne Sab0tagE.exe" /fi "imagename ne explorer.exe" /fi "imagename ne ssms.exe"' (with hidden window)
'%WINDIR%\syswow64\taskkill.exe' /f /fi "windowtitle eq process*"' (with hidden window)
'%WINDIR%\syswow64\taskkill.exe' /f /fi "modules eq iscan.dll"' (with hidden window)
'%WINDIR%\syswow64\taskkill.exe' /f /fi "modules eq rtpsvc.dll"' (with hidden window)
'%WINDIR%\syswow64\taskkill.exe' /f /fi "modules eq RegistryFX.dll"' (with hidden window)
'%WINDIR%\syswow64\taskkill.exe' /f /fi "modules eq rtpscan.dll"' (with hidden window)
Executes the following
'%WINDIR%\syswow64\cacls.exe' "%WINDIR%" /p everyone:f /e
'%WINDIR%\syswow64\cacls.exe' "%WINDIR%" /p everyone:n /e
'%WINDIR%\syswow64\schtasks.exe' /create /sc onstart /tn ssms /tr "%WINDIR%\ssms.exe" /ru System
'%WINDIR%\syswow64\schtasks.exe' /run /tn ssms
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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