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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

Curing recommendations

  1. 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.
  2. 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.
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After booting up, run a full scan of all disk partitions with Dr.Web Anti-virus for Linux.

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  1. 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.
  2. 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.

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