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Trojan.AVKill.4790

Added to the Dr.Web virus database: 2014-09-04

Virus description added:

Technical Information

To ensure autorun and distribution:
Modifies the following registry keys:
  • [<HKLM>\SOFTWARE\Clients\StartMenuInternet\IEXPLORE.EXE\shell\open\command] '' = '"<LS_APPDATA>\hlg.exe" -a "%PROGRAM_FILES%\Internet Explorer\iexplore.exe"'
  • [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'ctfmon.exe' = '<SYSTEM32>\ctfmon.exe'
Malicious functions:
To bypass firewall, removes or modifies the following registry keys:
  • [<HKLM>\SYSTEM\ControlSet001\Services\SharedAccess\Parameters\FirewallPolicy\DomainProfile] 'EnableFirewall' = '00000000'
  • [<HKLM>\SYSTEM\ControlSet001\Services\SharedAccess\Parameters\FirewallPolicy\DomainProfile] 'DoNotAllowExceptions' = '00000000'
  • [<HKLM>\SYSTEM\ControlSet001\Services\SharedAccess\Parameters\FirewallPolicy\DomainProfile] 'DisableNotifications' = '00000001'
  • [<HKLM>\SYSTEM\ControlSet001\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile] 'EnableFirewall' = '00000000'
  • [<HKLM>\SYSTEM\ControlSet001\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile] 'DoNotAllowExceptions' = '00000000'
  • [<HKLM>\SYSTEM\ControlSet001\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile] 'DisableNotifications' = '00000001'
To complicate detection of its presence in the operating system,
blocks the following features:
  • Windows Security Center
Creates and executes the following:
  • '<LS_APPDATA>\hlg.exe' -gav <Full path to virus>
Terminates or attempts to terminate
the following user processes:
  • safari.exe
  • opera.exe
  • chrome.exe
  • iexplore.exe
  • firefox.exe
Modifies file system :
Creates the following files:
  • %TEMP%\34w07hk3g8k4t83186884do78185iighsu2d4ncra5hyy8
  • %HOMEPATH%\Templates\34w07hk3g8k4t83186884do78185iighsu2d4ncra5hyy8
  • %ALLUSERSPROFILE%\Application Data\34w07hk3g8k4t83186884do78185iighsu2d4ncra5hyy8
  • <LS_APPDATA>\hlg.exe
  • <LS_APPDATA>\34w07hk3g8k4t83186884do78185iighsu2d4ncra5hyy8
Deletes itself.
Network activity:
Connects to:
  • 'va###agol.com':80
  • 'pu####gulerewy.com':80
  • 'de###yzedap.com':80
  • 'xo###yfudux.com':80
  • 'ti####dububy.com':80
  • 'ty###opojax.com':80
  • 'jo###yhyt.com':80
  • 'xi###ozenaj.com':80
  • 'bu###ywytyg.com':80
  • 'vi####qimysu.com':80
  • 'zy###ubyv.com':80
UDP:
  • DNS ASK qu###ulyr.com
  • DNS ASK ko####vymuzi.com
  • DNS ASK la####pihune.com
  • DNS ASK go####cobeqevi.com
  • DNS ASK da###ytagyc.com
  • DNS ASK se###onypar.com
  • DNS ASK po###aluj.com
  • DNS ASK ti####hisoxur.com
  • DNS ASK my####lymucy.com
  • DNS ASK vu###upuhaz.com
  • DNS ASK ry###akub.com
  • DNS ASK vo###ehimal.com
  • DNS ASK he####cawezawe.com
  • DNS ASK microsoft.com
  • DNS ASK wy####sunupi.com
  • DNS ASK me####xosomov.com
  • DNS ASK xi####sahysese.com
  • DNS ASK xo####sutecyd.com
  • DNS ASK pu####gulerewy.com
  • DNS ASK ty###opojax.com
  • DNS ASK de###yzedap.com
  • DNS ASK va###agol.com
  • DNS ASK vi####qimysu.com
  • DNS ASK jo###yhyt.com
  • DNS ASK xi###ozenaj.com
  • DNS ASK zy###ubyv.com
  • DNS ASK bu###ywytyg.com
  • DNS ASK ni###evydor.com
  • DNS ASK ji###ylexut.com
  • DNS ASK wy####bijahiw.com
  • DNS ASK pi####pomike.com
  • DNS ASK su###ygifi.com
  • DNS ASK xo###yfudux.com
  • DNS ASK ti####dububy.com
  • DNS ASK ju###eqej.com
  • DNS ASK la####piweso.com
Miscellaneous:
Searches for the following windows:
  • ClassName: 'Shell_TrayWnd' WindowName: ''
  • ClassName: 'msascui_class' 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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Use Dr.Web Anti-virus for macOS to run a full scan of your Mac.

After booting up, run a full scan of all disk partitions with Dr.Web Anti-virus for Linux.

Download Dr.Web

Download by serial number

  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.

Find out more about Dr.Web for Android