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Trojan.Siggen9.35776
Added to the Dr.Web virus database:
2020-04-09
Virus description added:
2020-04-10
Technical Information
To ensure autorun and distribution
Modifies the following registry keys
[<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'klqdn' = '%APPDATA%\frvuavws\vjvvievc.exe�'
Malicious functions
To complicate detection of its presence in the operating system,
blocks execution of the following system utilities:
Executes the following
'%WINDIR%\syswow64\netsh.exe' advfirewall firewall add rule name="blockport 2900" dir=out action=block protocol=TCP remoteport=2900
'%WINDIR%\syswow64\netsh.exe' advfirewall firewall add rule name="blockport 6600" dir=out action=block protocol=TCP remoteport=6600
'%WINDIR%\syswow64\netsh.exe' advfirewall firewall add rule name="blockport 4400" dir=out action=block protocol=TCP remoteport=4400
'%WINDIR%\syswow64\netsh.exe' advfirewall firewall add rule name="blockport 1100" dir=out action=block protocol=TCP remoteport=1100
'%WINDIR%\syswow64\netsh.exe' advfirewall firewall add rule name="blockport 3300" dir=out action=block protocol=TCP remoteport=3300
'%WINDIR%\syswow64\netsh.exe' advfirewall firewall add rule name="blockport 9900" dir=out action=block protocol=TCP remoteport=9900
'%WINDIR%\syswow64\netsh.exe' advfirewall firewall add rule name="blockport 8800" dir=out action=block protocol=TCP remoteport=8800
'%WINDIR%\syswow64\netsh.exe' advfirewall firewall add rule name="blockport 7700" dir=out action=block protocol=TCP remoteport=7700
'%WINDIR%\syswow64\netsh.exe' advfirewall firewall add rule name="blockport 2200" dir=out action=block protocol=TCP remoteport=2200
'%WINDIR%\syswow64\netsh.exe' advfirewall firewall add rule name="blockport 5500" dir=out action=block protocol=TCP remoteport=5500
Injects code into
the following system processes:
%WINDIR%\syswow64\notepad.exe
the following user processes:
Modifies file system
Creates the following files
%APPDATA%\frvuavws\vjvvievc.exe
%TEMP%\dd.te
Miscellaneous
Creates and executes the following
'%APPDATA%\frvuavws\vjvvievc.exe'
'%APPDATA%\frvuavws\vjvvievc.exe' wusaupdate
'<Full path to file>' ' (with hidden window)
'%WINDIR%\syswow64\cmd.exe' /C netsh advfirewall firewall add rule name="blockport 7700" dir=out action=block protocol=TCP remoteport=7700' (with hidden window)
'%WINDIR%\syswow64\cmd.exe' /C netsh advfirewall firewall add rule name="blockport 6600" dir=out action=block protocol=TCP remoteport=6600' (with hidden window)
'%WINDIR%\syswow64\cmd.exe' /C netsh advfirewall firewall add rule name="blockport 5500" dir=out action=block protocol=TCP remoteport=5500' (with hidden window)
'%WINDIR%\syswow64\cmd.exe' /C netsh advfirewall firewall add rule name="blockport 4400" dir=out action=block protocol=TCP remoteport=4400' (with hidden window)
'%WINDIR%\syswow64\cmd.exe' /C netsh advfirewall firewall add rule name="blockport 3300" dir=out action=block protocol=TCP remoteport=3300' (with hidden window)
'%WINDIR%\syswow64\cmd.exe' /C netsh advfirewall firewall add rule name="blockport 2200" dir=out action=block protocol=TCP remoteport=2200' (with hidden window)
'%WINDIR%\syswow64\cmd.exe' /C netsh advfirewall firewall add rule name="blockport 1100" dir=out action=block protocol=TCP remoteport=1100' (with hidden window)
'%WINDIR%\syswow64\cmd.exe' /C Reg add "HKEY_LOCAL_MACHINE\SOFTWARE\Policies\Microsoft\Windows Defender" /v DisableAntiSpyware /t REG_DWORD /d 1 /f' (with hidden window)
'%WINDIR%\syswow64\cmd.exe' /C netsh advfirewall firewall add rule name="blockport 8800" dir=out action=block protocol=TCP remoteport=8800' (with hidden window)
'%WINDIR%\syswow64\cmd.exe' /C sc config wuauserv start= disabled' (with hidden window)
'%WINDIR%\syswow64\cmd.exe' /C sc stop wuauserv' (with hidden window)
'%APPDATA%\frvuavws\vjvvievc.exe' wusaupdate' (with hidden window)
'%WINDIR%\syswow64\notepad.exe' ' (with hidden window)
'%WINDIR%\syswow64\cmd.exe' ' (with hidden window)
'%APPDATA%\frvuavws\vjvvievc.exe' ' (with hidden window)
'%WINDIR%\syswow64\cmd.exe' /C netsh advfirewall firewall add rule name="blockport 2900" dir=out action=block protocol=TCP remoteport=2900' (with hidden window)
'%WINDIR%\syswow64\cmd.exe' /C netsh advfirewall firewall add rule name="blockport 9900" dir=out action=block protocol=TCP remoteport=9900' (with hidden window)
Executes the following
'%WINDIR%\syswow64\cmd.exe'
'%WINDIR%\syswow64\reg.exe' add "HKEY_LOCAL_MACHINE\SOFTWARE\Policies\Microsoft\Windows Defender" /v DisableAntiSpyware /t REG_DWORD /d 1 /f
'%WINDIR%\syswow64\cmd.exe' /C netsh advfirewall firewall add rule name="blockport 9900" dir=out action=block protocol=TCP remoteport=9900
'%WINDIR%\syswow64\cmd.exe' /C netsh advfirewall firewall add rule name="blockport 8800" dir=out action=block protocol=TCP remoteport=8800
'%WINDIR%\syswow64\cmd.exe' /C netsh advfirewall firewall add rule name="blockport 7700" dir=out action=block protocol=TCP remoteport=7700
'%WINDIR%\syswow64\cmd.exe' /C netsh advfirewall firewall add rule name="blockport 6600" dir=out action=block protocol=TCP remoteport=6600
'%WINDIR%\syswow64\cmd.exe' /C netsh advfirewall firewall add rule name="blockport 5500" dir=out action=block protocol=TCP remoteport=5500
'%WINDIR%\syswow64\cmd.exe' /C netsh advfirewall firewall add rule name="blockport 4400" dir=out action=block protocol=TCP remoteport=4400
'%WINDIR%\syswow64\cmd.exe' /C netsh advfirewall firewall add rule name="blockport 3300" dir=out action=block protocol=TCP remoteport=3300
'%WINDIR%\syswow64\cmd.exe' /C netsh advfirewall firewall add rule name="blockport 2200" dir=out action=block protocol=TCP remoteport=2200
'%WINDIR%\syswow64\cmd.exe' /C netsh advfirewall firewall add rule name="blockport 1100" dir=out action=block protocol=TCP remoteport=1100
'%WINDIR%\syswow64\cmd.exe' /C netsh advfirewall firewall add rule name="blockport 2900" dir=out action=block protocol=TCP remoteport=2900
'%WINDIR%\syswow64\cmd.exe' /C Reg add "HKEY_LOCAL_MACHINE\SOFTWARE\Policies\Microsoft\Windows Defender" /v DisableAntiSpyware /t REG_DWORD /d 1 /f
'%WINDIR%\syswow64\cmd.exe' /C sc config wuauserv start= disabled
'%WINDIR%\syswow64\cmd.exe' /C sc stop wuauserv
'%WINDIR%\syswow64\notepad.exe'
'%WINDIR%\syswow64\sc.exe' config wuauserv start= disabled
'%WINDIR%\syswow64\sc.exe' stop wuauserv
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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