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Trojan.Encoder.38112

Added to the Dr.Web virus database: 2023-10-12

Virus description added:

Technical Information

To ensure autorun and distribution
Modifies the following registry keys
  • [HKCU\Software\Classes\.crypted\shell\Open\command] '' = 'explorer.exe HOWTORECOVER.html'
Creates the following files on removable media
  • <Drive name for removable media>:\howtorecover.html
  • <Drive name for removable media>:\000814251_video_01.avi
Modifies file system
Creates the following files
  • <Full path to file>.log
  • %APPDATA%\thunderbird\howtorecover.html
  • %APPDATA%\thunderbird\crash reports\howtorecover.html
  • %APPDATA%\telegram desktop\howtorecover.html
  • %APPDATA%\microsoft\protect\s-1-5-21-3150914307-1777937420-491476919-1000\howtorecover.html
  • %APPDATA%\microsoft\protect\howtorecover.html
  • %APPDATA%\microsoft\crypto\rsa\s-1-5-21-3150914307-1777937420-491476919-1000\howtorecover.html
  • %LOCALAPPDATA%low\sun\java\jre1.8.0_45_x64\howtorecover.html
  • %LOCALAPPDATA%low\sun\java\deployment\howtorecover.html
  • %LOCALAPPDATA%low\oracle\java\au\howtorecover.html
  • %LOCALAPPDATA%\microsoft\feeds cache\bbs9hw0e\howtorecover.html
  • %LOCALAPPDATA%\thunderbird\profiles\chdgbv82.default-release\startupcache\howtorecover.html
  • %LOCALAPPDATA%\thunderbird\profiles\chdgbv82.default-release\howtorecover.html
  • %LOCALAPPDATA%\microsoft\windows sidebar\howtorecover.html
  • %LOCALAPPDATA%\microsoft\windows media\12.0\howtorecover.html
  • %LOCALAPPDATA%\microsoft\windows mail\stationery\howtorecover.html
  • %LOCALAPPDATA%\microsoft\windows mail\backup\new\howtorecover.html
  • %LOCALAPPDATA%\microsoft\windows mail\howtorecover.html
  • %LOCALAPPDATA%\microsoft\media player\sync playlists\en-us\0000b025\howtorecover.html
  • %LOCALAPPDATA%\microsoft\media player\howtorecover.html
  • %LOCALAPPDATA%\microsoft\feeds cache\xwtafhng\howtorecover.html
  • %LOCALAPPDATA%\thunderbird\profiles\chdgbv82.default-release\cache2\entries\howtorecover.html
  • %LOCALAPPDATA%\microsoft\feeds cache\howtorecover.html
  • %APPDATA%\thunderbird\profiles\chdgbv82.default-release\howtorecover.html
  • %HOMEPATH%\favorites\howtorecover.html
  • %HOMEPATH%\saved games\howtorecover.html
  • %HOMEPATH%\pictures\howtorecover.html
  • %HOMEPATH%\howtorecover.html
  • %HOMEPATH%\music\howtorecover.html
  • %HOMEPATH%\links\howtorecover.html
  • %HOMEPATH%\favorites\windows live\howtorecover.html
  • %HOMEPATH%\favorites\msn websites\howtorecover.html
  • %HOMEPATH%\favorites\microsoft websites\howtorecover.html
  • %HOMEPATH%\favorites\links for united states\howtorecover.html
  • %APPDATA%\thunderbird\profiles\chdgbv82.default-release\datareporting\archived\2023-09\howtorecover.html
  • %APPDATA%\thunderbird\profiles\chdgbv82.default-release\crashes\howtorecover.html
  • %HOMEPATH%\downloads\howtorecover.html
  • %HOMEPATH%\documents\howtorecover.html
  • %HOMEPATH%\desktop\howtorecover.html
  • %HOMEPATH%\contacts\howtorecover.html
  • %APPDATA%\thunderbird\profiles\hmz1jddi.default\howtorecover.html
  • %APPDATA%\thunderbird\profiles\chdgbv82.default-release\storage\permanent\chrome\idb\howtorecover.html
  • %APPDATA%\thunderbird\profiles\chdgbv82.default-release\storage\permanent\chrome\howtorecover.html
  • %APPDATA%\thunderbird\profiles\chdgbv82.default-release\saved-telemetry-pings\howtorecover.html
  • %APPDATA%\thunderbird\profiles\chdgbv82.default-release\datareporting\howtorecover.html
  • %HOMEPATH%\favorites\links\howtorecover.html
  • %LOCALAPPDATA%\microsoft\feeds cache\6fwa5ftw\howtorecover.html
  • %LOCALAPPDATA%\microsoft\feeds cache\15ivkcr3\howtorecover.html
  • %LOCALAPPDATA%\microsoft\feeds\{5588acfd-6436-411b-a5ce-666ae6a92d3d}~\webslices~\howtorecover.html
  • C:\msocache\all users\{90140000-0115-0409-1000-0000000ff1ce}-c\howtorecover.html
  • C:\msocache\all users\{90140000-0115-0409-1000-0000000ff1ce}-c\1033\howtorecover.html
  • C:\msocache\all users\{90140000-00ba-0409-1000-0000000ff1ce}-c\howtorecover.html
  • C:\msocache\all users\{90140000-00a1-0409-1000-0000000ff1ce}-c\howtorecover.html
  • C:\msocache\all users\{90140000-0044-0409-1000-0000000ff1ce}-c\howtorecover.html
  • C:\msocache\all users\{90140000-0043-0409-1000-0000000ff1ce}-c\howtorecover.html
  • C:\msocache\all users\{90140000-002c-0409-1000-0000000ff1ce}-c\howtorecover.html
  • C:\msocache\all users\{90140000-002c-0409-1000-0000000ff1ce}-c\proof.fr\howtorecover.html
  • C:\msocache\all users\{90140000-0117-0409-1000-0000000ff1ce}-c\howtorecover.html
  • C:\msocache\all users\{90140000-002c-0409-1000-0000000ff1ce}-c\proof.es\howtorecover.html
  • C:\msocache\all users\{90140000-001b-0409-1000-0000000ff1ce}-c\howtorecover.html
  • C:\msocache\all users\{90140000-001a-0409-1000-0000000ff1ce}-c\howtorecover.html
  • C:\msocache\all users\{90140000-0019-0409-1000-0000000ff1ce}-c\howtorecover.html
  • C:\msocache\all users\{90140000-0018-0409-1000-0000000ff1ce}-c\howtorecover.html
  • C:\msocache\all users\{90140000-0016-0409-1000-0000000ff1ce}-c\howtorecover.html
  • C:\msocache\all users\{90140000-0011-0000-1000-0000000ff1ce}-c\howtorecover.html
  • D:\howtorecover.html
  • C:\kms\howtorecover.html
  • <Current directory>\howtorecover.html
  • C:\msocache\all users\{90140000-002c-0409-1000-0000000ff1ce}-c\proof.en\howtorecover.html
  • C:\howtorecover.html
  • C:\msocache\all users\{90140000-0117-0409-1000-0000000ff1ce}-c\access.en-us\howtorecover.html
  • %ProgramFiles%\howtorecover.html
  • %LOCALAPPDATA%\microsoft\feeds\microsoft feeds~\howtorecover.html
  • C:\users\public\music\sample music\howtorecover.html
  • %LOCALAPPDATA%\microsoft\feeds\howtorecover.html
  • %LOCALAPPDATA%\microsoft\feeds\feeds for united states~\howtorecover.html
  • %LOCALAPPDATA%\howtorecover.html
  • C:\users\public\videos\sample videos\howtorecover.html
  • C:\users\public\videos\howtorecover.html
  • C:\users\public\recorded tv\sample media\howtorecover.html
  • C:\users\public\recorded tv\howtorecover.html
  • C:\users\public\pictures\sample pictures\howtorecover.html
  • C:\users\public\pictures\howtorecover.html
  • C:\users\public\music\howtorecover.html
  • %ProgramFiles%\microsoft sql server compact edition\v3.5\howtorecover.html
  • C:\users\public\libraries\howtorecover.html
  • C:\users\public\downloads\howtorecover.html
  • C:\users\public\documents\howtorecover.html
  • C:\users\public\howtorecover.html
  • C:\users\public\desktop\howtorecover.html
  • C:\users\howtorecover.html
  • C:\users\default\howtorecover.html
  • C:\recovery\4cc8e8a4-51d2-11ee-b826-9a90d4dcffb5\howtorecover.html
  • %ProgramFiles(x86)%\howtorecover.html
  • %HOMEPATH%\searches\howtorecover.html
  • %HOMEPATH%\videos\howtorecover.html
Moves the following files
  • from %APPDATA%\microsoft\crypto\rsa\s-1-5-21-3150914307-1777937420-491476919-1000\f58155b4b1d5a524ca0261c3ee99fb50_d99ef00b-ccd3-4f1d-9980-90ac453b0b47 to %APPDATA%\microsoft\crypto\rsa\s-1-5-21-3150914307-1777937420-491476919-1000\f58155b4b1d5a524ca0261c3ee99fb50_d99ef00b-ccd3-4f1d-9980-90ac453b0b47.crypted
  • from %APPDATA%\thunderbird\profiles\chdgbv82.default-release\history.sqlite to %APPDATA%\thunderbird\profiles\chdgbv82.default-release\history.sqlite.crypted
  • from %APPDATA%\thunderbird\profiles\chdgbv82.default-release\openpgp.sqlite to %APPDATA%\thunderbird\profiles\chdgbv82.default-release\openpgp.sqlite.crypted
  • from %APPDATA%\thunderbird\profiles\chdgbv82.default-release\permissions.sqlite to %APPDATA%\thunderbird\profiles\chdgbv82.default-release\permissions.sqlite.crypted
  • from %APPDATA%\thunderbird\profiles\chdgbv82.default-release\pkcs11.txt to %APPDATA%\thunderbird\profiles\chdgbv82.default-release\pkcs11.txt.crypted
  • from %APPDATA%\thunderbird\profiles\chdgbv82.default-release\places.sqlite to %APPDATA%\thunderbird\profiles\chdgbv82.default-release\places.sqlite.crypted
  • from %APPDATA%\thunderbird\profiles\chdgbv82.default-release\prefs.js to %APPDATA%\thunderbird\profiles\chdgbv82.default-release\prefs.js.crypted
  • from %APPDATA%\thunderbird\profiles\chdgbv82.default-release\saved-telemetry-pings\199a0618-6d48-4205-858d-6b9a8ba9e913 to %APPDATA%\thunderbird\profiles\chdgbv82.default-release\saved-telemetry-pings\199a0618-6d48-4205-858d-6b9a8ba9e913.crypted
  • from %APPDATA%\thunderbird\profiles\chdgbv82.default-release\formhistory.sqlite to %APPDATA%\thunderbird\profiles\chdgbv82.default-release\formhistory.sqlite.crypted
  • from %APPDATA%\thunderbird\profiles\chdgbv82.default-release\global-messages-db.sqlite to %APPDATA%\thunderbird\profiles\chdgbv82.default-release\global-messages-db.sqlite.crypted
  • from %APPDATA%\thunderbird\profiles\chdgbv82.default-release\saved-telemetry-pings\22a456d0-5d02-445b-9603-4fe4b9e5c45c to %APPDATA%\thunderbird\profiles\chdgbv82.default-release\saved-telemetry-pings\22a456d0-5d02-445b-9603-4fe4b9e5c45c.crypted
  • from %APPDATA%\thunderbird\profiles\chdgbv82.default-release\sessioncheckpoints.json to %APPDATA%\thunderbird\profiles\chdgbv82.default-release\sessioncheckpoints.json.crypted
  • from %APPDATA%\thunderbird\profiles\chdgbv82.default-release\storage\permanent\chrome\.metadata-v2 to %APPDATA%\thunderbird\profiles\chdgbv82.default-release\storage\permanent\chrome\.metadata-v2.crypted
  • from %APPDATA%\thunderbird\profiles\chdgbv82.default-release\storage\permanent\chrome\idb\3870112724rsegmnoittet-es.sqlite to %APPDATA%\thunderbird\profiles\chdgbv82.default-release\storage\permanent\chrome\idb\3870112724rsegmnoittet-es.sqlite.crypted
  • from %APPDATA%\thunderbird\profiles\chdgbv82.default-release\storage.sqlite to %APPDATA%\thunderbird\profiles\chdgbv82.default-release\storage.sqlite.crypted
  • from %APPDATA%\thunderbird\profiles\chdgbv82.default-release\times.json to %APPDATA%\thunderbird\profiles\chdgbv82.default-release\times.json.crypted
  • from %APPDATA%\thunderbird\profiles\chdgbv82.default-release\webappsstore.sqlite to %APPDATA%\thunderbird\profiles\chdgbv82.default-release\webappsstore.sqlite.crypted
  • from %APPDATA%\thunderbird\profiles\chdgbv82.default-release\xulstore.json to %APPDATA%\thunderbird\profiles\chdgbv82.default-release\xulstore.json.crypted
  • from %APPDATA%\thunderbird\profiles\chdgbv82.default-release\saved-telemetry-pings\d8154144-ac52-40e8-b685-b640783b2c0d to %APPDATA%\thunderbird\profiles\chdgbv82.default-release\saved-telemetry-pings\d8154144-ac52-40e8-b685-b640783b2c0d.crypted
  • from %APPDATA%\thunderbird\profiles\chdgbv82.default-release\search.json.mozlz4 to %APPDATA%\thunderbird\profiles\chdgbv82.default-release\search.json.mozlz4.crypted
  • from %APPDATA%\thunderbird\profiles\chdgbv82.default-release\favicons.sqlite to %APPDATA%\thunderbird\profiles\chdgbv82.default-release\favicons.sqlite.crypted
  • from %APPDATA%\thunderbird\profiles\chdgbv82.default-release\extensions.json to %APPDATA%\thunderbird\profiles\chdgbv82.default-release\extensions.json.crypted
  • from %APPDATA%\thunderbird\profiles\chdgbv82.default-release\extension-preferences.json to %APPDATA%\thunderbird\profiles\chdgbv82.default-release\extension-preferences.json.crypted
  • from %APPDATA%\microsoft\protect\s-1-5-21-3150914307-1777937420-491476919-1000\51da22b7-9513-4885-adb9-cd2e72f47f0a to %APPDATA%\microsoft\protect\s-1-5-21-3150914307-1777937420-491476919-1000\51da22b7-9513-4885-adb9-cd2e72f47f0a.crypted
  • from %APPDATA%\microsoft\protect\s-1-5-21-3150914307-1777937420-491476919-1000\preferred to %APPDATA%\microsoft\protect\s-1-5-21-3150914307-1777937420-491476919-1000\preferred.crypted
  • from %APPDATA%\thunderbird\crash reports\installtime20210406220621 to %APPDATA%\thunderbird\crash reports\installtime20210406220621.crypted
  • from %APPDATA%\thunderbird\installs.ini to %APPDATA%\thunderbird\installs.ini.crypted
  • from %APPDATA%\thunderbird\profiles\chdgbv82.default-release\abook.sqlite to %APPDATA%\thunderbird\profiles\chdgbv82.default-release\abook.sqlite.crypted
  • from %APPDATA%\thunderbird\profiles\chdgbv82.default-release\addons.json to %APPDATA%\thunderbird\profiles\chdgbv82.default-release\addons.json.crypted
  • from %APPDATA%\thunderbird\profiles\chdgbv82.default-release\addonstartup.json.lz4 to %APPDATA%\thunderbird\profiles\chdgbv82.default-release\addonstartup.json.lz4.crypted
  • from %APPDATA%\thunderbird\profiles\chdgbv82.default-release\blist.sqlite to %APPDATA%\thunderbird\profiles\chdgbv82.default-release\blist.sqlite.crypted
  • from %APPDATA%\microsoft\protect\credhist to %APPDATA%\microsoft\protect\credhist.crypted
  • from %APPDATA%\thunderbird\profiles\chdgbv82.default-release\compatibility.ini to %APPDATA%\thunderbird\profiles\chdgbv82.default-release\compatibility.ini.crypted
  • from %APPDATA%\thunderbird\profiles\chdgbv82.default-release\crashes\store.json.mozlz4 to %APPDATA%\thunderbird\profiles\chdgbv82.default-release\crashes\store.json.mozlz4.crypted
  • from %APPDATA%\thunderbird\profiles\chdgbv82.default-release\datareporting\archived\2023-09\1694565729880.22a456d0-5d02-445b-9603-4fe4b9e5c45c.new-profile.jsonlz4 to %APPDATA%\thunderbird\profiles\chdgbv82.default-release\datareporting\archived\2023-09\1694565729880.22a456d0-5d02-445b-9603-4fe4b9e5c45c.new-profile.jsonlz4.crypted
  • from %APPDATA%\thunderbird\profiles\chdgbv82.default-release\datareporting\archived\2023-09\1694565729925.d8154144-ac52-40e8-b685-b640783b2c0d.main.jsonlz4 to %APPDATA%\thunderbird\profiles\chdgbv82.default-release\datareporting\archived\2023-09\1694565729925.d8154144-ac52-40e8-b685-b640783b2c0d.main.jsonlz4.crypted
  • from %APPDATA%\thunderbird\profiles\chdgbv82.default-release\datareporting\archived\2023-09\1694565729926.199a0618-6d48-4205-858d-6b9a8ba9e913.first-shutdown.jsonlz4 to %APPDATA%\thunderbird\profiles\chdgbv82.default-release\datareporting\archived\2023-09\1694565729926.199a0618-6d48-4205-858d-6b9a8ba9e913.first-shutdown.jsonlz4.crypted
  • from %APPDATA%\thunderbird\profiles\chdgbv82.default-release\datareporting\session-state.json to %APPDATA%\thunderbird\profiles\chdgbv82.default-release\datareporting\session-state.json.crypted
  • from %APPDATA%\thunderbird\profiles\chdgbv82.default-release\datareporting\state.json to %APPDATA%\thunderbird\profiles\chdgbv82.default-release\datareporting\state.json.crypted
  • from %APPDATA%\thunderbird\profiles\chdgbv82.default-release\directorytree.json to %APPDATA%\thunderbird\profiles\chdgbv82.default-release\directorytree.json.crypted
  • from %APPDATA%\thunderbird\profiles\chdgbv82.default-release\enigmail.sqlite to %APPDATA%\thunderbird\profiles\chdgbv82.default-release\enigmail.sqlite.crypted
  • from %APPDATA%\thunderbird\profiles\chdgbv82.default-release\cookies.sqlite to %APPDATA%\thunderbird\profiles\chdgbv82.default-release\cookies.sqlite.crypted
  • from %APPDATA%\thunderbird\profiles\hmz1jddi.default\times.json to %APPDATA%\thunderbird\profiles\hmz1jddi.default\times.json.crypted
  • from %APPDATA%\thunderbird\profiles.ini to %APPDATA%\thunderbird\profiles.ini.crypted
Modifies the following files
  • C:\kms\kms_vl_all_aio_debug.log.crypted
  • C:\msocache\all users\{90140000-0044-0409-1000-0000000ff1ce}-c\infopathmui.xml.crypted
  • C:\msocache\all users\{90140000-0043-0409-1000-0000000ff1ce}-c\setup.xml.crypted
  • C:\msocache\all users\{90140000-0043-0409-1000-0000000ff1ce}-c\owow32lr.cab.crypted
  • C:\msocache\all users\{90140000-0043-0409-1000-0000000ff1ce}-c\office32mui.xml.crypted
  • C:\msocache\all users\{90140000-002c-0409-1000-0000000ff1ce}-c\setup.xml.crypted
  • C:\msocache\all users\{90140000-002c-0409-1000-0000000ff1ce}-c\proofing.xml.crypted
  • C:\msocache\all users\{90140000-002c-0409-1000-0000000ff1ce}-c\proof.fr\proof.xml.crypted
  • C:\msocache\all users\{90140000-002c-0409-1000-0000000ff1ce}-c\proof.es\proof.xml.crypted
  • C:\msocache\all users\{90140000-002c-0409-1000-0000000ff1ce}-c\proof.en\proof.xml.crypted
  • C:\msocache\all users\{90140000-001b-0409-1000-0000000ff1ce}-c\wordmui.xml.crypted
  • C:\msocache\all users\{90140000-001b-0409-1000-0000000ff1ce}-c\setup.xml.crypted
  • C:\msocache\all users\{90140000-0011-0000-1000-0000000ff1ce}-c\propsww.cab.crypted
  • C:\msocache\all users\{90140000-001a-0409-1000-0000000ff1ce}-c\setup.xml.crypted
  • C:\msocache\all users\{90140000-001a-0409-1000-0000000ff1ce}-c\outlookmui.xml.crypted
  • C:\msocache\all users\{90140000-0019-0409-1000-0000000ff1ce}-c\setup.xml.crypted
  • C:\msocache\all users\{90140000-0019-0409-1000-0000000ff1ce}-c\publr.cab.crypted
  • C:\msocache\all users\{90140000-0019-0409-1000-0000000ff1ce}-c\publishermui.xml.crypted
  • C:\msocache\all users\{90140000-0018-0409-1000-0000000ff1ce}-c\setup.xml.crypted
  • C:\msocache\all users\{90140000-0018-0409-1000-0000000ff1ce}-c\powerpointmui.xml.crypted
  • C:\msocache\all users\{90140000-0016-0409-1000-0000000ff1ce}-c\setup.xml.crypted
  • C:\msocache\all users\{90140000-0016-0409-1000-0000000ff1ce}-c\excelmui.xml.crypted
  • C:\msocache\all users\{90140000-0011-0000-1000-0000000ff1ce}-c\setup.xml.crypted
  • C:\msocache\all users\{90140000-0011-0000-1000-0000000ff1ce}-c\proplusww.xml.crypted
  • C:\msocache\all users\{90140000-0011-0000-1000-0000000ff1ce}-c\pkeyconfig-office.xrm-ms.crypted
  • C:\msocache\all users\{90140000-0011-0000-1000-0000000ff1ce}-c\owow32ww.cab.crypted
  • C:\msocache\all users\{90140000-0011-0000-1000-0000000ff1ce}-c\office32ww.xml.crypted
  • <Drive name for removable media>:\000814251_video_01.avi.crypted
  • C:\msocache\all users\{90140000-0044-0409-1000-0000000ff1ce}-c\setup.xml.crypted
  • C:\msocache\all users\{90140000-00a1-0409-1000-0000000ff1ce}-c\onenotemui.xml.crypted
Modifies multiple files.
Substitutes the following files
  • C:\Users\Default\NTUSER.DAT
  • C:\Users\Default\NTUSER.DAT.LOG
  • C:\Users\Default\NTUSER.DAT.LOG1
Changes user data files extensions (Trojan.Encoder).

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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Download by serial number

Use Dr.Web Anti-virus for macOS to run a full scan of your Mac.

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

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Download by serial number

  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.

Find out more about Dr.Web for Android