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Trojan.MulDrop23.53548

Added to the Dr.Web virus database: 2023-09-14

Virus description added:

Technical Information

To ensure autorun and distribution
Modifies the following registry keys
  • [HKLM\Software\Wow6432Node\Microsoft\Windows\CurrentVersion\Run] 'NortonOnlineBackupReminder' = '"%ProgramFiles(x86)%\Symantec\Norton Online Backup\Activation\NobuActivation.exe" UNATTENDED'
Modifies file system
Creates the following files
  • %TEMP%\7zsa784.tmp\run.bat
  • %TEMP%\7zsa784.tmp\activationinstaller.msi
  • %ProgramFiles(x86)%\symantec\norton online backup\activation\nobuactivation.exe
  • %ProgramFiles(x86)%\symantec\norton online backup\activation\activationbackground.bmp
  • %ALLUSERSPROFILE%\symantec\norton online backup\nobuactivation.ini
  • %ProgramFiles(x86)%\symantec\norton online backup\activation\normalapp.ico
  • %WINDIR%\installer\{c57bcde1-7cb9-467d-b3ba-7e119916cdc1}\icon.ico
  • %ALLUSERSPROFILE%\microsoft\windows\start menu\programs\norton online backup\norton online backup.lnk
  • %TEMP%\boost_interprocess\ini_file_mutex
Deletes the following files
  • %TEMP%\boost_interprocess\ini_file_mutex
  • %TEMP%\7zsa784.tmp\activationinstaller.msi
  • %TEMP%\7zsa784.tmp\run.bat
Substitutes the following files
  • %TEMP%\boost_interprocess\ini_file_mutex
Miscellaneous
Creates and executes the following
  • '%WINDIR%\installer\msidf99.tmp' %ProgramFiles(x86)%\Symantec\Norton Online Backup\Activation\NOBuActivation.exe SET ProductGuid=C57BCDE1-7CB9-467d-B3BA-7E119916CDC1
  • '%ProgramFiles(x86)%\symantec\norton online backup\activation\nobuactivation.exe' SET lang.1401=20021793
  • '%ProgramFiles(x86)%\symantec\norton online backup\activation\nobuactivation.exe' SET lang.1501=20022007
  • '%ProgramFiles(x86)%\symantec\norton online backup\activation\nobuactivation.exe' SET lang.1901=20021960
  • '%ProgramFiles(x86)%\symantec\norton online backup\activation\nobuactivation.exe' SET lang.0a03=20021811
  • '%ProgramFiles(x86)%\symantec\norton online backup\activation\nobuactivation.exe' SET lang.1d01=20022021
  • '%ProgramFiles(x86)%\symantec\norton online backup\activation\nobuactivation.exe' SET lang.1f01=20022022
  • '%ProgramFiles(x86)%\symantec\norton online backup\activation\nobuactivation.exe' SET DaysToDelayAfterFirstBoot=5
  • '%ProgramFiles(x86)%\symantec\norton online backup\activation\nobuactivation.exe' SET reg.EntitlementType=skubased
  • '%ProgramFiles(x86)%\symantec\norton online backup\activation\nobuactivation.exe' SET LearnMoreURL=
  • '%ProgramFiles(x86)%\symantec\norton online backup\activation\nobuactivation.exe' SET NOBuServer=https://nobu.backup.com
  • '%ProgramFiles(x86)%\symantec\norton online backup\activation\nobuactivation.exe' SET reg.InitialStorage=5
  • '%ProgramFiles(x86)%\symantec\norton online backup\activation\nobuactivation.exe' SET ActivationReminderThreshold=4
  • '%ProgramFiles(x86)%\symantec\norton online backup\activation\nobuactivation.exe' SET CurrentActivationReminderCount=0
  • '%ProgramFiles(x86)%\symantec\norton online backup\activation\nobuactivation.exe' SET DontDisplayActivationCountdown=10
  • '%ProgramFiles(x86)%\symantec\norton online backup\activation\nobuactivation.exe' SET lang.1201=20021977
  • '%ProgramFiles(x86)%\symantec\norton online backup\activation\nobuactivation.exe' SET BootDisplayDelay=300
  • '%ProgramFiles(x86)%\symantec\norton online backup\activation\nobuactivation.exe' SET lang.1101=20022016
  • '%ProgramFiles(x86)%\symantec\norton online backup\activation\nobuactivation.exe' SET lang.0501=20021524
  • '%ProgramFiles(x86)%\symantec\norton online backup\activation\nobuactivation.exe' SET ProductGuid=C57BCDE1-7CB9-467d-B3BA-7E119916CDC1
  • '%ProgramFiles(x86)%\symantec\norton online backup\activation\nobuactivation.exe' SET reg.VendorID=2300
  • '%ProgramFiles(x86)%\symantec\norton online backup\activation\nobuactivation.exe' SET reg.InitialDuration=30
  • '%ProgramFiles(x86)%\symantec\norton online backup\activation\nobuactivation.exe' SET lang.1601=20021580
  • '%ProgramFiles(x86)%\symantec\norton online backup\activation\nobuactivation.exe' SET lang.0402=20021575
  • '%ProgramFiles(x86)%\symantec\norton online backup\activation\nobuactivation.exe' SET lang.0401=20021662
  • '%ProgramFiles(x86)%\symantec\norton online backup\activation\nobuactivation.exe' SET lang.0601=20021560
  • '%ProgramFiles(x86)%\symantec\norton online backup\activation\nobuactivation.exe' SET lang.1602=20021808
  • '%ProgramFiles(x86)%\symantec\norton online backup\activation\nobuactivation.exe' SET lang.1301=20021584
  • '%ProgramFiles(x86)%\symantec\norton online backup\activation\nobuactivation.exe' SET lang.0901=20021531
  • '%ProgramFiles(x86)%\symantec\norton online backup\activation\nobuactivation.exe' SET lang.0b01=20021581
  • '%ProgramFiles(x86)%\symantec\norton online backup\activation\nobuactivation.exe' SET lang.0c01=20022037
  • '%ProgramFiles(x86)%\symantec\norton online backup\activation\nobuactivation.exe' SET lang.0701=20022009
  • '%ProgramFiles(x86)%\symantec\norton online backup\activation\nobuactivation.exe' SET lang.0e01=20021872
  • '%ProgramFiles(x86)%\symantec\norton online backup\activation\nobuactivation.exe' SET lang.1001=20021963
  • '%ProgramFiles(x86)%\symantec\norton online backup\activation\nobuactivation.exe' AUTORUN
Executes the following
  • '%WINDIR%\syswow64\cmd.exe' /c .\run.bat
  • '%WINDIR%\syswow64\msiexec.exe' /qn /package ActivationInstaller.msi

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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