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Trojan.MulDrop16.45636

Added to the Dr.Web virus database: 2021-04-24

Virus description added:

Technical Information

Malicious functions
Executes the following
  • '%WINDIR%\syswow64\taskkill.exe' /f /im XD.exe
Modifies file system
Creates the following files
  • %TEMP%\adobe temp\adobecert.reg
  • %TEMP%\adobe temp\rewrite.cmd
  • %TEMP%\adobe temp\setacl.exe
  • %TEMP%\adobe temp\cinema 4d.exe
  • %TEMP%\adobe temp\xd.exe
  • %TEMP%\adobe temp\ngl-lib.dll
  • %TEMP%\adobe temp\regrights.bkp
  • unc\gydtxp*\mailslot\net\netlogon
Deletes the following files
  • %TEMP%\adobe temp\adobecert.reg
  • %TEMP%\adobe temp\cinema 4d.exe
  • %TEMP%\adobe temp\ngl-lib.dll
  • %TEMP%\adobe temp\regrights.bkp
  • %TEMP%\adobe temp\rewrite.cmd
  • %TEMP%\adobe temp\setacl.exe
  • %TEMP%\adobe temp\xd.exe
Miscellaneous
Searches for the following windows
  • ClassName: 'RegEdit_RegEdit' WindowName: ''
  • ClassName: '' WindowName: ''
Creates and executes the following
  • '%TEMP%\adobe temp\setacl.exe' -on "%ProgramFiles%\WindowsApps" -ot file -actn list -lst "f:sddl;w:d,s,o" -bckp "%TEMP%\Adobe Temp\regrights.bkp"
  • '%TEMP%\adobe temp\setacl.exe' -on "%ProgramFiles%\WindowsApps" -ot file -actn setowner -ownr "n:gydtxp\user"
  • '%TEMP%\adobe temp\setacl.exe' -on "%ProgramFiles%\WindowsApps" -ot file -actn ace -ace " "n:gydtxp\user;p:full"
  • '%TEMP%\adobe temp\setacl.exe' -on "%ProgramFiles%\WindowsApps" -ot file -actn restore -bckp "%TEMP%\Adobe Temp\regrights.bkp"
  • '%WINDIR%\syswow64\cmd.exe' /c VER | FIND "6.1" && IF NOT ERRORLEVEL 1 (REGEDIT /s "%TEMP%\Adobe Temp\adobecert.reg")' (with hidden window)
  • '%WINDIR%\syswow64\cmd.exe' /c CD /d "%sfxpath:~0,-20%\Adobe 2021" && START Set-up.exe' (with hidden window)
  • '%WINDIR%\syswow64\cmd.exe' /c IF EXIST "%ProgramFiles%\Maxon Cinema 4D R24\Cinema 4D.exe" ( REN "%ProgramFiles%\Maxon Cinema 4D R24\Cinema 4D.exe" "Cinema 4D.yes" && XCOPY /y /r "%TEMP%\Adobe Temp\Cinema 4D.exe" "%Progra...' (with hidden window)
  • '%TEMP%\adobe temp\setacl.exe' -on "%ProgramFiles%\WindowsApps" -ot file -actn list -lst "f:sddl;w:d,s,o" -bckp "%TEMP%\Adobe Temp\regrights.bkp"' (with hidden window)
  • '%TEMP%\adobe temp\setacl.exe' -on "%ProgramFiles%\WindowsApps" -ot file -actn setowner -ownr "n:gydtxp\user"' (with hidden window)
  • '%WINDIR%\syswow64\taskkill.exe' /f /im XD.exe' (with hidden window)
  • '%TEMP%\adobe temp\setacl.exe' -on "%ProgramFiles%\WindowsApps" -ot file -actn ace -ace " "n:gydtxp\user;p:full"' (with hidden window)
  • '%WINDIR%\syswow64\cmd.exe' /c ""%TEMP%\Adobe Temp\rewrite.cmd" "' (with hidden window)
  • '%TEMP%\adobe temp\setacl.exe' -on "%ProgramFiles%\WindowsApps" -ot file -actn restore -bckp "%TEMP%\Adobe Temp\regrights.bkp"' (with hidden window)
Executes the following
  • '%WINDIR%\syswow64\cmd.exe' /c VER | FIND "6.1" && IF NOT ERRORLEVEL 1 (REGEDIT /s "%TEMP%\Adobe Temp\adobecert.reg")
  • '%WINDIR%\syswow64\cmd.exe' /S /D /c" VER "
  • '%WINDIR%\syswow64\find.exe' "6.1"
  • '%WINDIR%\syswow64\regedit.exe' /s "%TEMP%\Adobe Temp\adobecert.reg"
  • '%WINDIR%\syswow64\cmd.exe' /c CD /d "%sfxpath:~0,-20%\Adobe 2021" && START Set-up.exe
  • '%WINDIR%\syswow64\cmd.exe' /c IF EXIST "%ProgramFiles%\Maxon Cinema 4D R24\Cinema 4D.exe" ( REN "%ProgramFiles%\Maxon Cinema 4D R24\Cinema 4D.exe" "Cinema 4D.yes" && XCOPY /y /r "%TEMP%\Adobe Temp\Cinema 4D.exe" "%Progra...
  • '%WINDIR%\syswow64\cmd.exe' /c ""%TEMP%\Adobe Temp\rewrite.cmd" "

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.

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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

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