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Trojan.Encoder.38833
Added to the Dr.Web virus database:
2024-04-22
Virus description added:
2024-04-23
Technical Information
To ensure autorun and distribution
Creates the following files on removable media
<Drive name for removable media>:\how to restore your files.txt
<Drive name for removable media>:\system volume information\how to restore your files.txt
<Drive name for removable media>:\system volume information\wpsettings.dat.babyk
<Drive name for removable media>:\gruenspecht_02172016.pptx
<Drive name for removable media>:\waterresourcesag.pptx
<Drive name for removable media>:\iso27k_isms_implementation_and_certification_process_overview_v2.pptx
<Drive name for removable media>:\middaugh_keynote.pptx
<Drive name for removable media>:\roozenedowebinar.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:
Searches for windows to
detect analytical utilities:
ClassName: 'OLLYDBG', WindowName: ''
ClassName: 'GBDYLLO', WindowName: ''
ClassName: 'pediy06', WindowName: ''
ClassName: 'FilemonClass', WindowName: ''
ClassName: '', WindowName: 'File Monitor - Sysinternals: www.sysinternals.com'
ClassName: 'PROCMON_WINDOW_CLASS', WindowName: ''
ClassName: '', WindowName: 'Process Monitor - Sysinternals: www.sysinternals.com'
ClassName: 'RegmonClass', WindowName: ''
ClassName: '', WindowName: 'Registry Monitor - Sysinternals: www.sysinternals.com'
Modifies file system
Creates the following files
C:\how to restore your files.txt
C:\users\public\music\how to restore your files.txt
%HOMEPATH%\.oracle_jre_usage\how to restore your files.txt
%HOMEPATH%\3d objects\how to restore your files.txt
%HOMEPATH%\application data\how to restore your files.txt
%HOMEPATH%\contacts\how to restore your files.txt
%HOMEPATH%\cookies\how to restore your files.txt
C:\users\public\desktop\how to restore your files.txt
%HOMEPATH%\documents\how to restore your files.txt
%HOMEPATH%\documents\my music\how to restore your files.txt
%HOMEPATH%\desktop\how to restore your files.txt
%HOMEPATH%\documents\my videos\how to restore your files.txt
%HOMEPATH%\documents\my pictures\how to restore your files.txt
%HOMEPATH%\favorites\how to restore your files.txt
C:\users\default\downloads\how to restore your files.txt
%HOMEPATH%\local settings\how to restore your files.txt
%HOMEPATH%\nethood\how to restore your files.txt
%HOMEPATH%\downloads\how to restore your files.txt
%HOMEPATH%\onedrive\how to restore your files.txt
%HOMEPATH%\favorites\links\how to restore your files.txt
%HOMEPATH%\pictures\camera roll\how to restore your files.txt
%HOMEPATH%\recent\how to restore your files.txt
%HOMEPATH%\saved games\how to restore your files.txt
%HOMEPATH%\printhood\how to restore your files.txt
%HOMEPATH%\start menu\how to restore your files.txt
%HOMEPATH%\templates\how to restore your files.txt
%HOMEPATH%\searches\how to restore your files.txt
%HOMEPATH%\sendto\how to restore your files.txt
D:\how to restore your files.txt
C:\users\public\libraries\how to restore your files.txt
%HOMEPATH%\how to restore your files.txt
C:\users\public\downloads\how to restore your files.txt
C:\users\public\documents\how to restore your files.txt
C:\users\public\documents\my videos\how to restore your files.txt
<Current directory>\how to restore your files.txt
C:\kms\how to restore your files.txt
C:\msocache\how to restore your files.txt
C:\perflogs\how to restore your files.txt
C:\recovery\how to restore your files.txt
C:\recovery\windowsre\how to restore your files.txt
C:\users\default\how to restore your files.txt
C:\users\default\cookies\how to restore your files.txt
C:\users\default\application data\how to restore your files.txt
C:\users\default\desktop\how to restore your files.txt
C:\users\default\documents\how to restore your files.txt
C:\users\default\documents\my music\how to restore your files.txt
C:\users\default\documents\my pictures\how to restore your files.txt
m:\how to restore your files.txt
%HOMEPATH%\links\how to restore your files.txt
C:\users\default\documents\my videos\how to restore your files.txt
m:\system volume information\wpsettings.dat
C:\users\default\links\how to restore your files.txt
C:\users\default\local settings\how to restore your files.txt
C:\users\default\nethood\how to restore your files.txt
C:\users\default\printhood\how to restore your files.txt
C:\users\default\recent\how to restore your files.txt
C:\users\default\saved games\how to restore your files.txt
C:\users\default\sendto\how to restore your files.txt
C:\users\default\start menu\how to restore your files.txt
C:\users\default\templates\how to restore your files.txt
C:\users\public\how to restore your files.txt
C:\users\public\accountpictures\how to restore your files.txt
C:\users\public\documents\my pictures\how to restore your files.txt
C:\documents and settings\how to restore your files.txt
C:\users\default\favorites\how to restore your files.txt
m:\bootnxt.babyk
Modifies the following files
C:\kms\kms_vl_all_aio.cmd.babyk
C:\users\public\desktop\firefox.lnk.babyk
%HOMEPATH%\desktop\telegram.lnk.babyk
%HOMEPATH%\desktop\microsoft edge.lnk.babyk
C:\users\public\desktop\acrobat reader dc.lnk.babyk
C:\users\public\desktop\mozilla thunderbird.lnk.babyk
%HOMEPATH%\desktop\210252809.jpeg.babyk
%HOMEPATH%\desktop\210252809.jpg.babyk
%HOMEPATH%\desktop\168.jpeg.babyk
C:\users\public\desktop\opera.lnk.babyk
C:\users\public\desktop\steam.lnk.babyk
C:\users\public\libraries\recordedtv.library-ms.babyk
%HOMEPATH%\desktop\google chrome.lnk.babyk
%HOMEPATH%\.oracle_jre_usage\90737d32e3aba6b.timestamp.babyk
C:\users\default\ntuser.dat{fd9a35db-49fe-11e9-aa2c-248a07783950}.tmcontainer00000000000000000002.regtrans-ms.babyk
C:\users\default\ntuser.dat{2d8c3f0b-3f9b-11ed-9ead-0800278e6e63}.tm.blf.babyk
C:\users\default\ntuser.dat.log2.babyk
C:\users\default\ntuser.dat{fd9a35db-49fe-11e9-aa2c-248a07783950}.tm.blf.babyk
C:\users\default\ntuser.dat{fd9a35db-49fe-11e9-aa2c-248a07783950}.tmcontainer00000000000000000001.regtrans-ms.babyk
C:\users\default\ntuser.dat{2d8c3f0b-3f9b-11ed-9ead-0800278e6e63}.tmcontainer00000000000000000002.regtrans-ms.babyk
C:\users\default\ntuser.dat{2d8c3f0b-3f9b-11ed-9ead-0800278e6e63}.tmcontainer00000000000000000001.regtrans-ms.babyk
C:\users\default\ntuser.dat.log1.babyk
C:\recovery\windowsre\reagent.xml.babyk
C:\recovery\windowsre\boot.sdi.babyk
C:\kms\kms_vl_all_aio_debug.log.babyk
C:\recovery\windowsre\winre.wim.babyk
%HOMEPATH%\links\desktop.lnk.babyk
Modifies multiple files.
Changes user data files extensions (Trojan.Encoder).
Miscellaneous
Searches for the following windows
ClassName: 'OleMainThreadWndClass' WindowName: ''
ClassName: '18467-41' WindowName: ''
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
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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