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Added to the Dr.Web virus database: 2013-04-01

Virus description added:

Technical Information

To ensure autorun and distribution:
Creates the following services:
  • [<HKLM>\SYSTEM\ControlSet001\Services\uvnc_service] 'Start' = '00000002'
Malicious functions:
To bypass firewall, removes or modifies the following registry keys:
  • [<HKLM>\SYSTEM\ControlSet001\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile\AuthorizedApplications\List] '%PROGRAM_FILES%\UltraVNC\winvnc.exe' = '%PROGRAM_FILES%\UltraVNC\winvnc.exe:*:Enabled:winvnc.exe'
Creates and executes the following:
  • %PROGRAM_FILES%\UltraVNC\winvnc.exe -service
  • %PROGRAM_FILES%\UltraVNC\winvnc.exe -service_run
  • %PROGRAM_FILES%\UltraVNC\winvnc.exe -servicehelper
  • %PROGRAM_FILES%\UltraVNC\winvnc.exe -install
  • %WINDIR%\Temp\UltraVNC_1.0.8.2_Setup.exe /verysilent /loadinf=vnc.inf
  • %TEMP%\is-V1GT2.tmp\UltraVNC_1.0.8.2_Setup.tmp /SL5="$100EC,1523807,346112,%WINDIR%\Temp\UltraVNC_1.0.8.2_Setup.exe" /verysilent /loadinf=vnc.inf
  • %TEMP%\is-DC5PH.tmp\check_install.exe silent
Executes the following:
  • <SYSTEM32>\netsh.exe firewall add portopening TCP 5800 vnc5800
  • <SYSTEM32>\netsh.exe firewall add allowedprogram "%PROGRAM_FILES%\UltraVNC\winvnc.exe" "winvnc.exe" ENABLE ALL
  • <SYSTEM32>\net1.exe start WinVNC
  • <SYSTEM32>\netsh.exe firewall add portopening protocol=TCP port=5900 name=UltraVNC interface="local area connection"
  • <SYSTEM32>\net1.exe start "uvnc_service"
  • <SYSTEM32>\netsh.exe firewall add portopening TCP 5900 vnc5900
Modifies file system :
Creates the following files:
  • %PROGRAM_FILES%\UltraVNC\is-VG1MQ.tmp
  • %PROGRAM_FILES%\UltraVNC\is-DGN7H.tmp
  • %PROGRAM_FILES%\UltraVNC\is-4K9BM.tmp
  • %PROGRAM_FILES%\UltraVNC\is-3AUJ5.tmp
  • %PROGRAM_FILES%\UltraVNC\is-C8CMO.tmp
  • %PROGRAM_FILES%\UltraVNC\is-J625K.tmp
  • %PROGRAM_FILES%\UltraVNC\is-4F4VM.tmp
  • %PROGRAM_FILES%\UltraVNC\is-L13EA.tmp
  • %PROGRAM_FILES%\UltraVNC\is-O54UM.tmp
  • %ALLUSERSPROFILE%\Start Menu\Programs\UltraVNC\Edit Settings.lnk
  • %ALLUSERSPROFILE%\Start Menu\Programs\UltraVNC\UltraVNC Server\Stop WinVNC Service.lnk
  • %PROGRAM_FILES%\UltraVNC\unins000.dat
  • %PROGRAM_FILES%\UltraVNC\ultravnc.ini
  • %PROGRAM_FILES%\UltraVNC\rc4.key
  • %ALLUSERSPROFILE%\Start Menu\Programs\UltraVNC\UltraVNC Server\Start WinVNC Service.lnk
  • %PROGRAM_FILES%\UltraVNC\is-OQTE0.tmp
  • %PROGRAM_FILES%\UltraVNC\is-T4JMS.tmp
  • %ALLUSERSPROFILE%\Start Menu\Programs\UltraVNC\UltraVNC Server.lnk
  • %ALLUSERSPROFILE%\Start Menu\Programs\UltraVNC\UltraVNC Server\Remove WinVNC Service.lnk
  • %ALLUSERSPROFILE%\Start Menu\Programs\UltraVNC\UltraVNC Server\Install WinVNC Service.lnk
  • %WINDIR%\Temp\rc4.key
  • %TEMP%\aut4.tmp
  • %TEMP%\aut5.tmp
  • %TEMP%\is-V1GT2.tmp\UltraVNC_1.0.8.2_Setup.tmp
  • %WINDIR%\Temp\ultravnc.ini
  • %WINDIR%\Temp\vnc.inf
  • %WINDIR%\Temp\tsi-logo.JPG
  • %TEMP%\aut1.tmp
  • %TEMP%\aut2.tmp
  • %TEMP%\aut3.tmp
  • %WINDIR%\Temp\UltraVNC_1.0.8.2_Setup.exe
  • %TEMP%\is-DC5PH.tmp\_isetup\_RegDLL.tmp
  • %PROGRAM_FILES%\UltraVNC\is-G7N61.tmp
  • %PROGRAM_FILES%\UltraVNC\is-CLA48.tmp
  • %TEMP%\is-DC5PH.tmp\isxdl.dll
  • %TEMP%\is-DC5PH.tmp\_isetup\_shfoldr.dll
  • %TEMP%\is-DC5PH.tmp\UltraVNC.ico
  • %TEMP%\is-DC5PH.tmp\check_install.exe
Deletes the following files:
  • %TEMP%\is-DC5PH.tmp\_isetup\_shfoldr.dll
  • %TEMP%\is-V1GT2.tmp\UltraVNC_1.0.8.2_Setup.tmp
  • %TEMP%\is-DC5PH.tmp\UltraVNC.ico
  • %TEMP%\is-DC5PH.tmp\_isetup\_RegDLL.tmp
  • %WINDIR%\Temp\vnc.inf
  • %WINDIR%\Temp\UltraVNC_1.0.8.2_Setup.exe
  • %WINDIR%\Temp\tsi-logo.JPG
  • %WINDIR%\Temp\rc4.key
  • %WINDIR%\Temp\ultravnc.ini
  • %TEMP%\aut3.tmp
  • %TEMP%\aut4.tmp
  • %TEMP%\aut1.tmp
  • %TEMP%\aut2.tmp
  • %TEMP%\aut5.tmp
  • %TEMP%\is-DC5PH.tmp\check_install.exe
  • %TEMP%\is-DC5PH.tmp\isxdl.dll
  • %PROGRAM_FILES%\UltraVNC\Whatsnew.txt
  • %PROGRAM_FILES%\UltraVNC\Licence.txt
Moves the following files:
  • from %PROGRAM_FILES%\UltraVNC\is-VG1MQ.tmp to %PROGRAM_FILES%\UltraVNC\MSRC4Plugin.dsm
  • from %PROGRAM_FILES%\UltraVNC\is-SNOGG.tmp to %PROGRAM_FILES%\UltraVNC\Whatsnew.txt
  • from %PROGRAM_FILES%\UltraVNC\is-DGN7H.tmp to %PROGRAM_FILES%\UltraVNC\MSLogonACL.exe
  • from %PROGRAM_FILES%\UltraVNC\is-L13EA.tmp to %PROGRAM_FILES%\UltraVNC\ldapauth.dll
  • from %PROGRAM_FILES%\UltraVNC\is-MSKTA.tmp to %PROGRAM_FILES%\UltraVNC\authSSP.dll
  • from %PROGRAM_FILES%\UltraVNC\is-T4JMS.tmp to %PROGRAM_FILES%\UltraVNC\SecureVNCPluginARC4.dsm
  • from %PROGRAM_FILES%\UltraVNC\is-OQTE0.tmp to %PROGRAM_FILES%\UltraVNC\uvnc_settings.exe
  • from %PROGRAM_FILES%\UltraVNC\is-O54UM.tmp to %PROGRAM_FILES%\UltraVNC\SecureVNCPlugin.dsm
  • from %PROGRAM_FILES%\UltraVNC\is-3AUJ5.tmp to %PROGRAM_FILES%\UltraVNC\Licence.txt
  • from %PROGRAM_FILES%\UltraVNC\is-4K9BM.tmp to %PROGRAM_FILES%\UltraVNC\Readme_dsm.txt
  • from %PROGRAM_FILES%\UltraVNC\is-EJOCI.tmp to %PROGRAM_FILES%\UltraVNC\workgrpdomnt4.dll
  • from %PROGRAM_FILES%\UltraVNC\is-KLTVJ.tmp to %PROGRAM_FILES%\UltraVNC\Licence.txt
  • from %PROGRAM_FILES%\UltraVNC\is-TBSDM.tmp to %PROGRAM_FILES%\UltraVNC\Readme.txt
  • from %PROGRAM_FILES%\UltraVNC\is-G7N61.tmp to %PROGRAM_FILES%\UltraVNC\Whatsnew.txt
  • from %PROGRAM_FILES%\UltraVNC\is-DLMKD.tmp to %PROGRAM_FILES%\UltraVNC\unins000.exe
  • from %PROGRAM_FILES%\UltraVNC\is-LLDLV.tmp to %PROGRAM_FILES%\UltraVNC\check_install.exe
  • from %PROGRAM_FILES%\UltraVNC\is-C8CMO.tmp to %PROGRAM_FILES%\UltraVNC\logging.dll
  • from %PROGRAM_FILES%\UltraVNC\is-4F4VM.tmp to %PROGRAM_FILES%\UltraVNC\authadmin.dll
  • from %PROGRAM_FILES%\UltraVNC\is-J625K.tmp to %PROGRAM_FILES%\UltraVNC\vnchooks.dll
  • from %PROGRAM_FILES%\UltraVNC\is-JQARD.tmp to %PROGRAM_FILES%\UltraVNC\winvnc.exe
  • from %PROGRAM_FILES%\UltraVNC\is-CLA48.tmp to %PROGRAM_FILES%\UltraVNC\logmessages.dll
Network activity:
Connects to:
  • 'localhost':5900
Searches for the following windows:
  • ClassName: 'Shell_TrayWnd' WindowName: ''

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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