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Trojan.Encoder.38313
Added to the Dr.Web virus database:
2023-12-07
Virus description added:
2024-03-29
Technical Information
To ensure autorun and distribution
Creates the following files on removable media
<Drive name for removable media>:\data breach warning.txt
<Drive name for removable media>:\iso27k_isms_implementation_and_certification_process_overview_v2.pptx
<Drive name for removable media>:\stoc13_ml_quoc_le.pptx
<Drive name for removable media>:\waterresourcesag.pptx
<Drive name for removable media>:\hypothyroidism_slides.pptx
<Drive name for removable media>:\asaprojectcompetition.pptx
Malicious functions
To complicate detection of its presence in the operating system,
deletes volume shadow copies.
Terminates or attempts to terminate
the following user processes:
Modifies file system
Creates the following files
C:\data breach warning.txt
C:\users\public\recorded tv\data breach warning.txt
C:\users\public\recorded tv\sample media\data breach warning.txt
C:\users\public\videos\sample videos\data breach warning.txt
%HOMEPATH%\data breach warning.txt
C:\users\public\pictures\sample pictures\data breach warning.txt
%HOMEPATH%\application data\data breach warning.txt
%HOMEPATH%\contacts\data breach warning.txt
%HOMEPATH%\cookies\data breach warning.txt
%HOMEPATH%\desktop\data breach warning.txt
%HOMEPATH%\documents\data breach warning.txt
%HOMEPATH%\documents\my music\data breach warning.txt
%HOMEPATH%\documents\my pictures\data breach warning.txt
%HOMEPATH%\documents\my videos\data breach warning.txt
%HOMEPATH%\downloads\data breach warning.txt
%HOMEPATH%\favorites\links for united states\data breach warning.txt
D:\data breach warning.txt
%HOMEPATH%\favorites\links\data breach warning.txt
%HOMEPATH%\favorites\microsoft websites\data breach warning.txt
%HOMEPATH%\favorites\msn websites\data breach warning.txt
%HOMEPATH%\favorites\windows live\data breach warning.txt
%HOMEPATH%\links\data breach warning.txt
%HOMEPATH%\local settings\data breach warning.txt
%HOMEPATH%\nethood\data breach warning.txt
%HOMEPATH%\printhood\data breach warning.txt
%HOMEPATH%\recent\data breach warning.txt
%HOMEPATH%\saved games\data breach warning.txt
%HOMEPATH%\searches\data breach warning.txt
%HOMEPATH%\sendto\data breach warning.txt
%HOMEPATH%\start menu\data breach warning.txt
%HOMEPATH%\templates\data breach warning.txt
C:\users\public\libraries\data breach warning.txt
%HOMEPATH%\favorites\data breach warning.txt
C:\users\public\music\sample music\data breach warning.txt
C:\users\default\documents\my videos\data breach warning.txt
C:\kms\data breach warning.txt
<Current directory>\data breach warning.txt
C:\documents and settings\data breach warning.txt
C:\recovery\data breach warning.txt
C:\recovery\fc7d0508-3f8d-11ed-bf82-c9aa0b5639b5\data breach warning.txt
C:\users\default\data breach warning.txt
C:\users\default\desktop\data breach warning.txt
C:\users\default\cookies\data breach warning.txt
C:\users\default\application data\data breach warning.txt
C:\users\default\documents\data breach warning.txt
C:\users\default\documents\my music\data breach warning.txt
C:\users\default\documents\my pictures\data breach warning.txt
C:\users\default\downloads\data breach warning.txt
C:\users\default\favorites\data breach warning.txt
C:\users\default\links\data breach warning.txt
C:\users\public\downloads\data breach warning.txt
C:\users\default\local settings\data breach warning.txt
C:\users\default\nethood\data breach warning.txt
C:\users\default\printhood\data breach warning.txt
C:\users\default\recent\data breach warning.txt
C:\users\default\saved games\data breach warning.txt
C:\users\default\sendto\data breach warning.txt
C:\users\public\data breach warning.txt
C:\users\public\desktop\data breach warning.txt
C:\users\default\start menu\data breach warning.txt
C:\users\public\documents\data breach warning.txt
C:\users\public\documents\my music\data breach warning.txt
C:\users\public\documents\my pictures\data breach warning.txt
C:\users\default\templates\data breach warning.txt
C:\users\public\documents\my videos\data breach warning.txt
C:\users\public\favorites\data breach warning.txt
m:\data breach warning.txt
Modifies the following files
C:\kms\kms_vl_all_aio.cmd.rawld
%HOMEPATH%\favorites\links for united states\gobiernousa.gov.url.rawld
%HOMEPATH%\favorites\links for united states\usa.gov.url.rawld
%HOMEPATH%\favorites\links\web slice gallery.url.rawld
%HOMEPATH%\desktop\telegram.lnk.rawld
%HOMEPATH%\desktop\google chrome.lnk.rawld
%HOMEPATH%\desktop\contoso.cer.rawld
%HOMEPATH%\desktop\advice_process.htm.rawld
%HOMEPATH%\contacts\user.contact.rawld
C:\users\public\videos\sample videos\wildlife.wmv.rawld
C:\users\public\recorded tv\sample media\win7_scenic-demoshort_raw.wtv.rawld
C:\users\public\music\sample music\sleep away.mp3.rawld
C:\users\public\desktop\mozilla thunderbird.lnk.rawld
C:\users\public\music\sample music\maid with the flaxen hair.mp3.rawld
C:\users\public\desktop\firefox.lnk.rawld
C:\users\public\desktop\steam.lnk.rawld
C:\users\public\desktop\opera.lnk.rawld
C:\users\public\music\sample music\kalimba.mp3.rawld
C:\users\public\libraries\recordedtv.library-ms.rawld
C:\users\public\desktop\acrobat reader dc.lnk.rawld
C:\users\default\ntuser.dat{016888bd-6c6f-11de-8d1d-001e0bcde3ec}.tmcontainer00000000000000000002.regtrans-ms.rawld
C:\users\default\ntuser.dat{016888bd-6c6f-11de-8d1d-001e0bcde3ec}.tmcontainer00000000000000000001.regtrans-ms.rawld
C:\users\default\ntuser.dat{016888bd-6c6f-11de-8d1d-001e0bcde3ec}.tm.blf.rawld
C:\users\default\ntuser.dat.log2.rawld
C:\users\default\ntuser.dat.log1.rawld
C:\recovery\fc7d0508-3f8d-11ed-bf82-c9aa0b5639b5\winre.wim.rawld
C:\recovery\fc7d0508-3f8d-11ed-bf82-c9aa0b5639b5\boot.sdi.rawld
C:\kms\kms_vl_all_aio_debug.log.rawld
%HOMEPATH%\favorites\msn websites\msn entertainment.url.rawld
%HOMEPATH%\favorites\microsoft websites\ie add-on site.url.rawld
Modifies multiple files.
Changes user data files extensions (Trojan.Encoder).
Miscellaneous
Creates and executes the following
'<SYSTEM32>\cmd.exe' /c vssadmin.exe delete shadows /all /quiet' (with hidden window)
Executes the following
'<SYSTEM32>\cmd.exe' /c vssadmin.exe delete shadows /all /quiet
'<SYSTEM32>\cmd.exe' /c shutdown -r -f -t 00
'<SYSTEM32>\shutdown.exe' -r -f -t 00
'<SYSTEM32>\logonui.exe' /flags:0x1
Curing recommendations
Windows
macOS
Linux
Android
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 .
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.
Use Dr.Web Anti-virus for macOS to run a full scan of your Mac.
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.
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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