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Trojan.Encoder.34029

Added to the Dr.Web virus database: 2021-06-16

Virus description added:

Technical Information

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:
  • firefox.exe
  • iexplore.exe
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
  • %APPDATA%\ecdh_pub_k.bin
  • %LOCALAPPDATA%\cef\user data\how to restore your files.txt
  • %LOCALAPPDATA%\cef\user data\widevinecdm\how to restore your files.txt
  • %LOCALAPPDATA%\cef\user data\dictionaries\how to restore your files.txt
  • %LOCALAPPDATA%\applicationhistory\how to restore your files.txt
  • %LOCALAPPDATA%\adobe\how to restore your files.txt
  • %LOCALAPPDATA%\adobe\color\how to restore your files.txt
  • %LOCALAPPDATA%\adobe\color\profiles\how to restore your files.txt
  • %LOCALAPPDATA%\adobe\acrocef\how to restore your files.txt
  • %LOCALAPPDATA%\adobe\acrocef\dc\how to restore your files.txt
  • %LOCALAPPDATA%\adobe\acrocef\dc\acrobat\how to restore your files.txt
  • %LOCALAPPDATA%\adobe\acrocef\dc\acrobat\cookie\how to restore your files.txt
  • %LOCALAPPDATA%\adobe\acrocef\dc\acrobat\cache\how to restore your files.txt
  • %LOCALAPPDATA%\adobe\acrobat\how to restore your files.txt
  • %LOCALAPPDATA%\cef\how to restore your files.txt
  • %LOCALAPPDATA%\adobe\acrobat\dc\how to restore your files.txt
  • %LOCALAPPDATA%\adobe\acrobat\dc\cache\how to restore your files.txt
  • C:\users\public\how to restore your files.txt
  • C:\users\public\videos\how to restore your files.txt
  • C:\users\public\videos\sample videos\how to restore your files.txt
  • C:\users\public\recorded tv\how to restore your files.txt
  • C:\users\public\recorded tv\sample media\how to restore your files.txt
  • C:\users\public\pictures\how to restore your files.txt
  • C:\users\public\pictures\sample pictures\how to restore your files.txt
  • C:\users\public\music\how to restore your files.txt
  • C:\users\public\music\sample music\how to restore your files.txt
  • C:\users\public\libraries\how to restore your files.txt
  • C:\users\public\favorites\how to restore your files.txt
  • C:\users\public\downloads\how to restore your files.txt
  • %LOCALAPPDATA%\adobe\acrobat\dc\toolssearchcacherdr\how to restore your files.txt
  • %LOCALAPPDATA%\microsoft\credentials\how to restore your files.txt
  • %LOCALAPPDATA%\microsoft\dbgclr\7.1\how to restore your files.txt
  • %LOCALAPPDATA%\microsoft\dbgclr\how to restore your files.txt
  • %LOCALAPPDATA%\microsoft\office\how to restore your files.txt
  • %LOCALAPPDATA%\microsoft\office\onetconfig\how to restore your files.txt
  • %LOCALAPPDATA%\microsoft\office\groove\how to restore your files.txt
  • %LOCALAPPDATA%\microsoft\office\groove\user\how to restore your files.txt
  • %LOCALAPPDATA%\microsoft\office\groove\system\how to restore your files.txt
  • %LOCALAPPDATA%\microsoft\office\14.0\how to restore your files.txt
  • %LOCALAPPDATA%\microsoft\msdn\how to restore your files.txt
  • %LOCALAPPDATA%\microsoft\msdn\7.0\how to restore your files.txt
  • %LOCALAPPDATA%\microsoft\media player\how to restore your files.txt
  • %LOCALAPPDATA%\microsoft\media player\transcoded files cache\how to restore your files.txt
  • %LOCALAPPDATA%\microsoft\media player\sync playlists\how to restore your files.txt
  • %LOCALAPPDATA%\microsoft\media player\sync playlists\en-us\how to restore your files.txt
  • %LOCALAPPDATA%\microsoft\media player\sync playlists\en-us\0005fdc0\how to restore your files.txt
  • %LOCALAPPDATA%\microsoft\media player\art cache\how to restore your files.txt
  • %LOCALAPPDATA%\microsoft\media player\art cache\localmls\how to restore your files.txt
  • %LOCALAPPDATA%\microsoft\feeds cache\how to restore your files.txt
  • %LOCALAPPDATA%\microsoft\feeds cache\evw7z7yu\how to restore your files.txt
  • %LOCALAPPDATA%\microsoft\feeds cache\e6k79x6b\how to restore your files.txt
  • %LOCALAPPDATA%\microsoft\feeds cache\dp0qcmsh\how to restore your files.txt
  • %LOCALAPPDATA%\microsoft\feeds cache\3v2zgiw9\how to restore your files.txt
  • %LOCALAPPDATA%\microsoft\feeds\how to restore your files.txt
  • %LOCALAPPDATA%\microsoft\feeds\{5588acfd-6436-411b-a5ce-666ae6a92d3d}~\how to restore your files.txt
  • %LOCALAPPDATA%\microsoft\feeds\{5588acfd-6436-411b-a5ce-666ae6a92d3d}~\webslices~\how to restore your files.txt
  • %LOCALAPPDATA%\microsoft\feeds\microsoft feeds~\how to restore your files.txt
  • %LOCALAPPDATA%\microsoft\feeds\feeds for united states~\how to restore your files.txt
  • %LOCALAPPDATA%\microsoft\event viewer\how to restore your files.txt
  • %LOCALAPPDATA%\microsoft\device metadata\how to restore your files.txt
  • %LOCALAPPDATA%\microsoft\device metadata\dmrccache\how to restore your files.txt
  • %LOCALAPPDATA%\microsoft\device metadata\dmrccache\downloads\how to restore your files.txt
  • C:\users\public\documents\how to restore your files.txt
  • %LOCALAPPDATA%\microsoft\publisher\how to restore your files.txt
  • C:\users\public\desktop\how to restore your files.txt
  • C:\users\default\videos\how to restore your files.txt
  • C:\far2\plugins\ftp\how to restore your files.txt
  • C:\far2\plugins\ftp\lib\how to restore your files.txt
  • C:\far2\plugins\filecase\how to restore your files.txt
  • C:\far2\plugins\farcmds\how to restore your files.txt
  • C:\far2\plugins\emenu\how to restore your files.txt
  • C:\far2\plugins\editcase\how to restore your files.txt
  • C:\far2\plugins\drawline\how to restore your files.txt
  • C:\far2\plugins\compare\how to restore your files.txt
  • C:\far2\plugins\brackets\how to restore your files.txt
  • C:\far2\plugins\autowrap\how to restore your files.txt
  • C:\far2\plugins\arclite\how to restore your files.txt
  • C:\far2\plugins\align\how to restore your files.txt
  • C:\far2\fexcept\how to restore your files.txt
  • C:\far2\plugins\hlfviewer\how to restore your files.txt
  • C:\far2\encyclopedia\how to restore your files.txt
  • C:\far2\documentation\how to restore your files.txt
  • C:\far2\documentation\rus\how to restore your files.txt
  • C:\far2\documentation\eng\how to restore your files.txt
  • C:\far2\addons\how to restore your files.txt
  • C:\far2\addons\xlat\how to restore your files.txt
  • C:\far2\addons\xlat\russian\how to restore your files.txt
  • C:\far2\addons\shell\how to restore your files.txt
  • C:\far2\addons\setup\how to restore your files.txt
  • C:\far2\addons\macros\how to restore your files.txt
  • C:\far2\addons\colors\how to restore your files.txt
  • C:\far2\addons\colors\default_highlighting\how to restore your files.txt
  • C:\far2\addons\colors\custom_highlighting\how to restore your files.txt
  • D:\how to restore your files.txt
  • C:\far2\encyclopedia\tap\how to restore your files.txt
  • C:\far2\plugins\macroview\how to restore your files.txt
  • C:\far2\plugins\network\how to restore your files.txt
  • C:\far2\plugins\proclist\how to restore your files.txt
  • C:\users\default\saved games\how to restore your files.txt
  • C:\users\default\pictures\how to restore your files.txt
  • C:\users\default\music\how to restore your files.txt
  • C:\users\default\links\how to restore your files.txt
  • C:\users\default\favorites\how to restore your files.txt
  • C:\users\default\downloads\how to restore your files.txt
  • C:\users\default\documents\how to restore your files.txt
  • C:\users\default\desktop\how to restore your files.txt
  • C:\users\default\appdata\how to restore your files.txt
  • C:\users\default\appdata\roaming\how to restore your files.txt
  • C:\users\default\appdata\roaming\microsoft\how to restore your files.txt
  • C:\users\default\appdata\roaming\media center programs\how to restore your files.txt
  • C:\users\default\appdata\local\how to restore your files.txt
  • C:\users\default\appdata\local\temp\how to restore your files.txt
  • C:\users\default\appdata\local\microsoft\how to restore your files.txt
  • C:\totalcmd\how to restore your files.txt
  • C:\totalcmd\language\how to restore your files.txt
  • C:\recovery\how to restore your files.txt
  • C:\recovery\1195d5a8-f371-11e4-9c00-dd3082671db2\how to restore your files.txt
  • C:\perflogs\how to restore your files.txt
  • C:\perflogs\admin\how to restore your files.txt
  • C:\msocache\how to restore your files.txt
  • <Current directory>\how to restore your files.txt
  • C:\far2\how to restore your files.txt
  • C:\far2\pluginsdk\how to restore your files.txt
  • C:\far2\pluginsdk\headers.pas\how to restore your files.txt
  • C:\far2\pluginsdk\headers.c\how to restore your files.txt
  • C:\far2\plugins\how to restore your files.txt
  • C:\far2\plugins\tmppanel\how to restore your files.txt
  • C:\users\default\how to restore your files.txt
  • %LOCALAPPDATA%\microsoft\taskschedulerconfig\how to restore your files.txt
Moves the following files
  • from %TEMP%\adobearm.log to %TEMP%\adobearm.log.__nist_k571__
  • from %TEMP%\dd_vcredist_amd64_20151216210341_000_vcruntimeminimum_x64.log to %TEMP%\dd_vcredist_amd64_20151216210341_000_vcruntimeminimum_x64.log.__nist_k571__
  • from %TEMP%\dd_vcredist_amd64_20151216210341.log to %TEMP%\dd_vcredist_amd64_20151216210341.log.__nist_k571__
  • from %TEMP%\dd_setuputility.txt to %TEMP%\dd_setuputility.txt.__nist_k571__
  • from %TEMP%\dd_ndp471-kb4033342-x86-x64-allos-enu_decompression_log.txt to %TEMP%\dd_ndp471-kb4033342-x86-x64-allos-enu_decompression_log.txt.__nist_k571__
  • from %TEMP%\dd_ndp452-kb2901907-x86-x64-allos-enu_decompression_log.txt to %TEMP%\dd_ndp452-kb2901907-x86-x64-allos-enu_decompression_log.txt.__nist_k571__
  • from %TEMP%\cvrf2a3.tmp.cvr to %TEMP%\cvrf2a3.tmp.cvr.__nist_k571__
  • from %TEMP%\cvreaf2.tmp.cvr to %TEMP%\cvreaf2.tmp.cvr.__nist_k571__
  • from %TEMP%\cvrde7f.tmp.cvr to %TEMP%\cvrde7f.tmp.cvr.__nist_k571__
  • from %TEMP%\cvrc867.tmp.cvr to %TEMP%\cvrc867.tmp.cvr.__nist_k571__
  • from %TEMP%\cvrbada.tmp.cvr to %TEMP%\cvrbada.tmp.cvr.__nist_k571__
  • from %TEMP%\cvr6d44.tmp.cvr to %TEMP%\cvr6d44.tmp.cvr.__nist_k571__
  • from %TEMP%\cvr6b9c.tmp.cvr to %TEMP%\cvr6b9c.tmp.cvr.__nist_k571__
  • from %TEMP%\cprogram files (x86)opera29.0.1795.47opera_autoupdate.metrics.lock to %TEMP%\cprogram files (x86)opera29.0.1795.47opera_autoupdate.metrics.lock.__nist_k571__
  • from %TEMP%\cprogram files (x86)opera29.0.1795.47opera_autoupdate.download.lock to %TEMP%\cprogram files (x86)opera29.0.1795.47opera_autoupdate.download.lock.__nist_k571__
  • from %TEMP%\aspnetsetup_00003.log to %TEMP%\aspnetsetup_00003.log.__nist_k571__
  • from %TEMP%\aspnetsetup_00002.log to %TEMP%\aspnetsetup_00002.log.__nist_k571__
  • from %TEMP%\aspnetsetup_00001.log to %TEMP%\aspnetsetup_00001.log.__nist_k571__
  • from %TEMP%\aspnetsetup_00000.log to %TEMP%\aspnetsetup_00000.log.__nist_k571__
  • from %TEMP%\aspnetsetup.log to %TEMP%\aspnetsetup.log.__nist_k571__
  • from %TEMP%\adobe_admlogs\adobe_gde.log to %TEMP%\adobe_admlogs\adobe_gde.log.__nist_k571__
  • from %TEMP%\adobe_admlogs\adobe_adm.log to %TEMP%\adobe_admlogs\adobe_adm.log.__nist_k571__
  • from %TEMP%\adobesfx.log to %TEMP%\adobesfx.log.__nist_k571__
  • from %TEMP%\adobearm_notlocked.log to %TEMP%\adobearm_notlocked.log.__nist_k571__
  • from %TEMP%\dd_vcredist_amd64_20151216210341_001_vcruntimeadditional_x64.log to %TEMP%\dd_vcredist_amd64_20151216210341_001_vcruntimeadditional_x64.log.__nist_k571__
  • from %TEMP%\dd_vcredist_x86_20151216210157.log to %TEMP%\dd_vcredist_x86_20151216210157.log.__nist_k571__
Modifies the following files
Modifies multiple files.
Modifies user data files (Trojan.Encoder).
Changes user data files extensions (Trojan.Encoder).
Miscellaneous
Searches for the following windows
  • 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

Recommandations pour le traitement

  1. 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.
  2. 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.
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Veuillez lancer le scan complet de toutes les partitions du disque à l'aide de Dr.Web Antivirus pour Linux.

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  1. 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.
  2. 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.

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