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Trojan.Encoder.32640

Added to the Dr.Web virus database: 2020-09-25

Virus description added:

Technical Information

To ensure autorun and distribution
Sets the following service settings
  • [<HKLM>\SYSTEM\CurrentControlSet\Services\IKEEXT] 'Start' = '00000002'
Creates the following files on removable media
  • <Drive name for removable media>:\delete.avi.[prisoner1@tuta.io][zu7d0r6maq43veg].void
  • <Drive name for removable media>:\dialmap.bmp.[prisoner1@tuta.io][zu7d0r6maq43veg].void
  • <Drive name for removable media>:\coffee.bmp.[prisoner1@tuta.io][zu7d0r6maq43veg].void
  • <Drive name for removable media>:\dashborder_96.bmp.[prisoner1@tuta.io][zu7d0r6maq43veg].void
  • <Drive name for removable media>:\dial.bmp.[prisoner1@tuta.io][zu7d0r6maq43veg].void
  • <Drive name for removable media>:\contosoroot.cer.[prisoner1@tuta.io][zu7d0r6maq43veg].void
  • <Drive name for removable media>:\contoso.cer.[prisoner1@tuta.io][zu7d0r6maq43veg].void
  • <Drive name for removable media>:\sdkfailsafeemulator.cer.[prisoner1@tuta.io][zu7d0r6maq43veg].void
  • <Drive name for removable media>:\pmd.cer.[prisoner1@tuta.io][zu7d0r6maq43veg].void
  • <Drive name for removable media>:\sdksampleunprivdeveloper.cer.[prisoner1@tuta.io][zu7d0r6maq43veg].void
  • <Drive name for removable media>:\testee.cer.[prisoner1@tuta.io][zu7d0r6maq43veg].void
  • <Drive name for removable media>:\hanni_umami_chapter.doc.[prisoner1@tuta.io][zu7d0r6maq43veg].void
  • <Drive name for removable media>:\adhd_and_obesity.docx.[prisoner1@tuta.io][zu7d0r6maq43veg].void
Malicious functions
Executes the following
  • '%WINDIR%\syswow64\net.exe' stop MSDTC
  • '%WINDIR%\syswow64\net.exe' stop SQLSERVERAGENT
  • '%WINDIR%\syswow64\net.exe' stop MSSQLSERVER
  • '%WINDIR%\syswow64\net.exe' stop vds
  • '%WINDIR%\syswow64\netsh.exe' firewall set opmode mode=disable
  • '%WINDIR%\syswow64\net.exe' stop SQLWriter
  • '%WINDIR%\syswow64\net.exe' stop SQLBrowser
  • '%WINDIR%\syswow64\net.exe' stop MSSQL$CONTOSO1
Injects code into
the following system processes:
  • %WINDIR%\explorer.exe
Modifies file system
Creates the following files
  • %ALLUSERSPROFILE%\idk.txt
  • %ALLUSERSPROFILE%\pubk.txt
  • C:\msocache\all users\{90160000-0011-0000-0000-0000000ff1ce}-c\ose.exe.[prisoner1@tuta.io][zu7d0r6maq43veg].void
  • C:\bootnxt.[prisoner1@tuta.io][zu7d0r6maq43veg].void
  • C:\$recycle.bin\s-1-5-21-1004681136-874170566-1875838749-1001\desktop.ini.[prisoner1@tuta.io][zu7d0r6maq43veg].void
  • D:\install.log.[prisoner1@tuta.io][zu7d0r6maq43veg].void
  • D:\install.log
  • C:\krd2018_data\legal notices\legal_notices.txt.[prisoner1@tuta.io][zu7d0r6maq43veg].void
  • D:\$recycle.bin\s-1-5-21-1004681136-874170566-1875838749-1001\desktop.ini.[prisoner1@tuta.io][zu7d0r6maq43veg].void
  • C:\msocache\all users\{90160000-0011-0000-0000-0000000ff1ce}-c\office64ww.xml.[prisoner1@tuta.io][zu7d0r6maq43veg].void
Modifies user data files (Trojan.Encoder).
Network activity
TCP
HTTP GET requests
  • /ip-provider.php via sf###dev.org
  • http://ctldl.windowsupdate.com/msdownload/update/v3/static/trustedr/en/disallowedcertstl.cab?75##############
HTTP POST requests
  • /1614CEEEC50A9336EBF690886CAA747D6811C45D37086A3FA7B11C9E83926C6C via 94.##0.46.250
  • 'localhost':49693
  • 'localhost':49695
  • 'localhost':49696
  • 'pa###bin.com':443
  • UDP
    • DNS ASK go.microsoft.com
    • DNS ASK share.microsoft.com
    • DNS ASK settings-win.data.microsoft.com
    • DNS ASK sf###dev.org
    • DNS ASK pa###bin.com
    • DNS ASK maps.windows.com
    • 'localhost':55361
    • 'localhost':55355
    Miscellaneous
    Searches for the following windows
    • ClassName: 'OleMainThreadWndClass' WindowName: ''
    Executes the following
    • '%WINDIR%\syswow64\cmd.exe' /c net stop MSDTC
    • '%WINDIR%\syswow64\net1.exe' stop SQLBrowser
    • '%WINDIR%\syswow64\cmd.exe' /c net stop SQLBrowser
    • '%WINDIR%\syswow64\net1.exe' stop SQLWriter
    • '%WINDIR%\syswow64\cmd.exe' /c net stop SQLWriter
    • '%WINDIR%\syswow64\cmd.exe' /c netsh firewall set opmode mode=disable
    • '<SYSTEM32>\devicecensus.exe' UserCxt
    • '%WINDIR%\syswow64\netsh.exe' advfirewall set currentprofile state off
    • '%WINDIR%\syswow64\cmd.exe' /c netsh advfirewall set currentprofile state off
    • '%WINDIR%\syswow64\cmd.exe' /c net stop MSSQL$CONTOSO1
    • '%WINDIR%\syswow64\net1.exe' stop vds
    • '%WINDIR%\syswow64\net1.exe' stop MSSQLSERVER
    • '%WINDIR%\syswow64\cmd.exe' /c net stop MSSQLSERVER
    • '%WINDIR%\syswow64\net1.exe' stop SQLSERVERAGENT
    • '%WINDIR%\syswow64\cmd.exe' /c net stop SQLSERVERAGENT
    • '%WINDIR%\syswow64\cmd.exe' /c wbadmin delete catalog -quiet
    • '%WINDIR%\syswow64\cmd.exe' /c bcdedit /set {default} recoveryenabled no
    • '%WINDIR%\syswow64\cmd.exe' /c bcdedit /set {default} bootstatuspolicy ignoreallfailures
    • '%WINDIR%\syswow64\net1.exe' stop MSDTC
    • '%WINDIR%\syswow64\cmd.exe' /c net stop vds
    • '%WINDIR%\syswow64\net1.exe' stop MSSQL$CONTOSO1

    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.
    Download Dr.Web

    Download by serial number

    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