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Trojan.Encoder.38238
Added to the Dr.Web virus database:
2023-11-18
Virus description added:
2024-03-29
Technical Information
To ensure autorun and distribution
Modifies the following registry keys
[HKCU\Software\Microsoft\Windows\CurrentVersion\Run] 'MicroUpdate' = '%HOMEPATH%\Documents\MSDCSC\msdcsc.exe'
[HKLM\Software\Microsoft\Windows NT\CurrentVersion\Winlogon] 'UserInit' = '<SYSTEM32>\userinit.exe,%HOMEPATH%\Documents\MSDCSC\msdcsc.exe'
[HKCU\software\microsoft\windows\currentversion\run] '{4046SVFC-807430-4046ZB-4046ZBMJGX}' = '"%HOMEPATH%\Svchost.exe" ...'
[HKCU\software\microsoft\windows\currentversion\run] '{ALLFG941-195011-HSSMN9-HSSMN94GJ5}' = '"%WINDIR%\Server.exe" ...'
[HKCU\SOFTWARE\Microsoft\Windows\CurrentVersion\Run] 'nvidiaDValueOn' = '%LOCALAPPDATA%\NVIDIA Local Drivers\DriversUpdateProcess_x64.exe'
Creates or modifies the following files
%WINDIR%\taskse.exe
%APPDATA%\microsoft\windows\start menu\programs\startup\{4046svfc-807430-4046zb-4046zbmjgx}.exe
%APPDATA%\microsoft\windows\start menu\programs\startup\{allfg941-195011-hssmn9-hssmn94gj5}.exe
<SYSTEM32>\tasks\system32filemanger
Creates the following files on removable media
<Drive name for removable media>:\1.bat
<Drive name for removable media>:\autorun.inf
Malicious functions
To bypass firewall, removes or modifies the following registry keys
[HKLM\SYSTEM\CurrentControlSet\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile] 'EnableFirewall' = '00000000'
To complicate detection of its presence in the operating system,
forces the system hide from view:
blocks execution of the following system utilities:
Windows Task Manager (Taskmgr)
Registry Editor (RegEdit)
Windows Security Center
blocks the following features:
User Account Control (UAC)
Windows Security Center
adds antivirus exclusion:
'<SYSTEM32>\windowspowershell\v1.0\powershell.exe' -ExecutionPolicy Bypass Add-MpPreference -ExclusionPath '%WINDIR%\Winrar.exe'
'<SYSTEM32>\windowspowershell\v1.0\powershell.exe' -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'Winrar.exe'
'<SYSTEM32>\windowspowershell\v1.0\powershell.exe' -ExecutionPolicy Bypass Add-MpPreference -ExclusionPath '%HOMEPATH%\Winrar'
Executes the following
'%WINDIR%\syswow64\net.exe' stop "Security Center"
'%WINDIR%\syswow64\netsh.exe' firewall set opmode mode=disable
'%WINDIR%\syswow64\net.exe' stop MpsSvc
'%WINDIR%\syswow64\taskkill.exe' /f /t /im FirewallControlPanel.exe
'%WINDIR%\syswow64\netsh.exe' firewall set opmode disable
'%WINDIR%\syswow64\net.exe' stop ACKWIN32
'%WINDIR%\syswow64\net.exe' stop ADVXDWIN
'%WINDIR%\syswow64\net.exe' stop ALERTSVC
'%WINDIR%\syswow64\net.exe' stop ALOGSERV
'%WINDIR%\syswow64\net.exe' stop AMON9X
'%WINDIR%\syswow64\net.exe' stop ANTI-TROJAN
'%WINDIR%\syswow64\net.exe' stop ANTS
Injects code into
the following system processes:
%WINDIR%\microsoft.net\framework\v4.0.30319\regasm.exe
Terminates or attempts to terminate
the following system processes:
%WINDIR%\syswow64\taskkill.exe
%WINDIR%\microsoft.net\framework\v4.0.30319\regasm.exe
Reads files which store third party applications passwords
%HOMEPATH%\desktop\1189.jpeg
%HOMEPATH%\desktop\dialmap.bmp
%HOMEPATH%\desktop\dial.bmp
%HOMEPATH%\desktop\delete.avi
%HOMEPATH%\desktop\default.bmp
%HOMEPATH%\desktop\dashborder_96.bmp
%HOMEPATH%\desktop\dashborder_192.bmp
%HOMEPATH%\desktop\correct.avi
%HOMEPATH%\desktop\archer.avi
%HOMEPATH%\desktop\000814251_video_01.avi
%HOMEPATH%\desktop\uep_form_786_bulletin_1726i602.doc
%HOMEPATH%\desktop\sdszfo.docx
%HOMEPATH%\desktop\region-north-karelia.jpg
%HOMEPATH%\desktop\pushkin.jpg
%HOMEPATH%\desktop\pushkin.jpeg
%HOMEPATH%\desktop\parnas_01.jpg
%HOMEPATH%\desktop\issi2013_template_for_posters.docx
%HOMEPATH%\desktop\glidescope_review_rev_010.docx
%HOMEPATH%\desktop\february_catalogue__2015.doc
%HOMEPATH%\desktop\aoc_saq_d_v3_merchant.docx
%HOMEPATH%\desktop\adhd_and_obesity.docx
%HOMEPATH%\desktop\210252809.jpeg
%HOMEPATH%\desktop\join.avi
%HOMEPATH%\desktop\tileimage.bmp
Modifies file system
Creates the following files
Sets the 'hidden' attribute to the following files
%HOMEPATH%\documents\msdcsc\msdcsc.exe
%APPDATA%\microsoft\windows\start menu\programs\startup\{4046svfc-807430-4046zb-4046zbmjgx}.exe
%WINDIR%\cute.bat
%APPDATA%\microsoft\windows\start menu\programs\startup\{allfg941-195011-hssmn9-hssmn94gj5}.exe
%WINDIR%\server.exe
%LOCALAPPDATA%\nvidia local drivers\driversupdateprocess_x64.exe
Deletes the following files
%WINDIR%\m.vbs
%HOMEPATH%\svchost.exe
%TEMP%\cmd.bat
<Drive name for removable media>:\cveuropeo.doc.wncryt
<Drive name for removable media>:\hanni_umami_chapter.doc.wncryt
Moves the following files
from %HOMEPATH%\desktop\1189.jpeg.wncryt to %HOMEPATH%\desktop\1189.jpeg.wncry
from %HOMEPATH%\desktop\210252809.jpeg.wncryt to %HOMEPATH%\desktop\210252809.jpeg.wncry
from %HOMEPATH%\desktop\adhd_and_obesity.docx.wncryt to %HOMEPATH%\desktop\adhd_and_obesity.docx.wncry
from %HOMEPATH%\desktop\aoc_saq_d_v3_merchant.docx.wncryt to %HOMEPATH%\desktop\aoc_saq_d_v3_merchant.docx.wncry
from %HOMEPATH%\desktop\february_catalogue__2015.doc.wncryt to %HOMEPATH%\desktop\february_catalogue__2015.doc.wncry
from %HOMEPATH%\desktop\glidescope_review_rev_010.docx.wncryt to %HOMEPATH%\desktop\glidescope_review_rev_010.docx.wncry
from %HOMEPATH%\desktop\issi2013_template_for_posters.docx.wncryt to %HOMEPATH%\desktop\issi2013_template_for_posters.docx.wncry
from %HOMEPATH%\desktop\parnas_01.jpg.wncryt to %HOMEPATH%\desktop\parnas_01.jpg.wncry
from %HOMEPATH%\desktop\pushkin.jpeg.wncryt to %HOMEPATH%\desktop\pushkin.jpeg.wncry
from %HOMEPATH%\desktop\pushkin.jpg.wncryt to %HOMEPATH%\desktop\pushkin.jpg.wncry
from %HOMEPATH%\desktop\region-north-karelia.jpg.wncryt to %HOMEPATH%\desktop\region-north-karelia.jpg.wncry
from %HOMEPATH%\desktop\sdszfo.docx.wncryt to %HOMEPATH%\desktop\sdszfo.docx.wncry
from %HOMEPATH%\desktop\uep_form_786_bulletin_1726i602.doc.wncryt to %HOMEPATH%\desktop\uep_form_786_bulletin_1726i602.doc.wncry
Modifies the following files
%HOMEPATH%\desktop\1189.jpeg
%HOMEPATH%\desktop\210252809.jpeg
%HOMEPATH%\desktop\adhd_and_obesity.docx
%HOMEPATH%\desktop\aoc_saq_d_v3_merchant.docx
%HOMEPATH%\desktop\february_catalogue__2015.doc
%HOMEPATH%\desktop\glidescope_review_rev_010.docx
%HOMEPATH%\desktop\issi2013_template_for_posters.docx
%HOMEPATH%\desktop\parnas_01.jpg
%HOMEPATH%\desktop\pushkin.jpeg
%HOMEPATH%\desktop\pushkin.jpg
%HOMEPATH%\desktop\region-north-karelia.jpg
%HOMEPATH%\desktop\sdszfo.docx
%HOMEPATH%\desktop\uep_form_786_bulletin_1726i602.doc
Substitutes the following files
Modifies user data files (Trojan.Encoder).
Changes user data files extensions (Trojan.Encoder).
Network activity
Connects to
'localhost':5552
'localhost':8080
'ch####p.dyndns.org':80
'localhost':1604
'wh#####oe.gl.at.ply.gg':63740
TCP
HTTP GET requests
http://ch####p.dyndns.org/
UDP
DNS ASK ch####p.dyndns.org
DNS ASK wh#####oe.gl.at.ply.gg
'localhost':62660
'localhost':50226
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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