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Trojan.Encoder.38118

Added to the Dr.Web virus database: 2023-10-13

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>:\archer.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-1-5-21-1238866942-1249195528-555854008-1000\howtorecover.html
  • %APPDATA%\microsoft\protect\howtorecover.html
  • %APPDATA%\microsoft\crypto\rsa\s-1-5-21-1238866942-1249195528-555854008-1000\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\howtorecover.html
  • %LOCALAPPDATA%\thunderbird\profiles\npsdfqy3.default-release\startupcache\howtorecover.html
  • %LOCALAPPDATA%\thunderbird\profiles\npsdfqy3.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\0003b056\howtorecover.html
  • %LOCALAPPDATA%\microsoft\media player\howtorecover.html
  • %LOCALAPPDATA%\microsoft\feeds cache\q2xofo16\howtorecover.html
  • %LOCALAPPDATA%\thunderbird\profiles\npsdfqy3.default-release\cache2\entries\howtorecover.html
  • %LOCALAPPDATA%\microsoft\feeds cache\id3ykpjl\howtorecover.html
  • %APPDATA%\thunderbird\profiles\49zr3fqa.default\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\npsdfqy3.default-release\crashes\howtorecover.html
  • %APPDATA%\thunderbird\profiles\npsdfqy3.default-release\howtorecover.html
  • %HOMEPATH%\downloads\howtorecover.html
  • %HOMEPATH%\documents\howtorecover.html
  • %HOMEPATH%\desktop\howtorecover.html
  • %HOMEPATH%\contacts\howtorecover.html
  • %APPDATA%\thunderbird\profiles\npsdfqy3.default-release\storage\permanent\chrome\idb\howtorecover.html
  • %APPDATA%\thunderbird\profiles\npsdfqy3.default-release\storage\permanent\chrome\howtorecover.html
  • %APPDATA%\thunderbird\profiles\npsdfqy3.default-release\saved-telemetry-pings\howtorecover.html
  • %APPDATA%\thunderbird\profiles\npsdfqy3.default-release\datareporting\howtorecover.html
  • %APPDATA%\thunderbird\profiles\npsdfqy3.default-release\datareporting\archived\2022-09\howtorecover.html
  • %HOMEPATH%\favorites\links\howtorecover.html
  • %LOCALAPPDATA%\microsoft\feeds cache\5uzys9tz\howtorecover.html
  • %LOCALAPPDATA%\microsoft\feeds cache\1zlrvj28\howtorecover.html
  • %LOCALAPPDATA%\microsoft\feeds\{5588acfd-6436-411b-a5ce-666ae6a92d3d}~\webslices~\howtorecover.html
  • C:\msocache\all users\{90140000-0117-0409-1000-0000000ff1ce}-c\access.en-us\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:\howtorecover.html
  • C:\msocache\all users\{90140000-002c-0409-1000-0000000ff1ce}-c\proof.fr\howtorecover.html
  • C:\msocache\all users\{90140000-002c-0409-1000-0000000ff1ce}-c\proof.en\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
  • C:\kms\howtorecover.html
  • D:\howtorecover.html
  • C:\msocache\all users\{90140000-002c-0409-1000-0000000ff1ce}-c\proof.es\howtorecover.html
  • %ProgramFiles%\howtorecover.html
  • C:\msocache\all users\{90140000-0117-0409-1000-0000000ff1ce}-c\howtorecover.html
  • %ProgramFiles%\microsoft sql server compact edition\v3.5\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(x86)%\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\fc7d0508-3f8d-11ed-bf82-c9aa0b5639b5\howtorecover.html
  • <Current directory>\howtorecover.html
  • %HOMEPATH%\searches\howtorecover.html
  • %HOMEPATH%\videos\howtorecover.html
Moves the following files
  • from %APPDATA%\microsoft\crypto\rsa\s-1-5-21-1238866942-1249195528-555854008-1000\f58155b4b1d5a524ca0261c3ee99fb50_d4602615-9d50-4880-be41-678935e93eaa to %APPDATA%\microsoft\crypto\rsa\s-1-5-21-1238866942-1249195528-555854008-1000\f58155b4b1d5a524ca0261c3ee99fb50_d4602615-9d50-4880-be41-678935e93eaa.crypted
  • from %APPDATA%\thunderbird\profiles\npsdfqy3.default-release\favicons.sqlite to %APPDATA%\thunderbird\profiles\npsdfqy3.default-release\favicons.sqlite.crypted
  • from %APPDATA%\thunderbird\profiles\npsdfqy3.default-release\formhistory.sqlite to %APPDATA%\thunderbird\profiles\npsdfqy3.default-release\formhistory.sqlite.crypted
  • from %APPDATA%\thunderbird\profiles\npsdfqy3.default-release\global-messages-db.sqlite to %APPDATA%\thunderbird\profiles\npsdfqy3.default-release\global-messages-db.sqlite.crypted
  • from %APPDATA%\thunderbird\profiles\npsdfqy3.default-release\history.sqlite to %APPDATA%\thunderbird\profiles\npsdfqy3.default-release\history.sqlite.crypted
  • from %APPDATA%\thunderbird\profiles\npsdfqy3.default-release\openpgp.sqlite to %APPDATA%\thunderbird\profiles\npsdfqy3.default-release\openpgp.sqlite.crypted
  • from %APPDATA%\thunderbird\profiles\npsdfqy3.default-release\permissions.sqlite to %APPDATA%\thunderbird\profiles\npsdfqy3.default-release\permissions.sqlite.crypted
  • from %APPDATA%\thunderbird\profiles\npsdfqy3.default-release\pkcs11.txt to %APPDATA%\thunderbird\profiles\npsdfqy3.default-release\pkcs11.txt.crypted
  • from %APPDATA%\thunderbird\profiles\npsdfqy3.default-release\places.sqlite to %APPDATA%\thunderbird\profiles\npsdfqy3.default-release\places.sqlite.crypted
  • from %APPDATA%\thunderbird\profiles\npsdfqy3.default-release\prefs.js to %APPDATA%\thunderbird\profiles\npsdfqy3.default-release\prefs.js.crypted
  • from %APPDATA%\thunderbird\profiles\npsdfqy3.default-release\saved-telemetry-pings\a6077284-6dcc-4781-9fb7-7f9d7b5132bf to %APPDATA%\thunderbird\profiles\npsdfqy3.default-release\saved-telemetry-pings\a6077284-6dcc-4781-9fb7-7f9d7b5132bf.crypted
  • from %APPDATA%\thunderbird\profiles\npsdfqy3.default-release\saved-telemetry-pings\d092fa80-6cc0-49cc-9da4-f67b3d6cdc55 to %APPDATA%\thunderbird\profiles\npsdfqy3.default-release\saved-telemetry-pings\d092fa80-6cc0-49cc-9da4-f67b3d6cdc55.crypted
  • from %APPDATA%\thunderbird\profiles\npsdfqy3.default-release\saved-telemetry-pings\e60182f3-3480-48d0-bc12-b3b897042a6b to %APPDATA%\thunderbird\profiles\npsdfqy3.default-release\saved-telemetry-pings\e60182f3-3480-48d0-bc12-b3b897042a6b.crypted
  • from %APPDATA%\thunderbird\profiles\npsdfqy3.default-release\search.json.mozlz4 to %APPDATA%\thunderbird\profiles\npsdfqy3.default-release\search.json.mozlz4.crypted
  • from %APPDATA%\thunderbird\profiles\npsdfqy3.default-release\sessioncheckpoints.json to %APPDATA%\thunderbird\profiles\npsdfqy3.default-release\sessioncheckpoints.json.crypted
  • from %APPDATA%\thunderbird\profiles\npsdfqy3.default-release\storage\permanent\chrome\.metadata-v2 to %APPDATA%\thunderbird\profiles\npsdfqy3.default-release\storage\permanent\chrome\.metadata-v2.crypted
  • from %APPDATA%\thunderbird\profiles\npsdfqy3.default-release\storage\permanent\chrome\idb\3870112724rsegmnoittet-es.sqlite to %APPDATA%\thunderbird\profiles\npsdfqy3.default-release\storage\permanent\chrome\idb\3870112724rsegmnoittet-es.sqlite.crypted
  • from %APPDATA%\thunderbird\profiles\npsdfqy3.default-release\storage.sqlite to %APPDATA%\thunderbird\profiles\npsdfqy3.default-release\storage.sqlite.crypted
  • from %APPDATA%\thunderbird\profiles\npsdfqy3.default-release\times.json to %APPDATA%\thunderbird\profiles\npsdfqy3.default-release\times.json.crypted
  • from %APPDATA%\thunderbird\profiles\npsdfqy3.default-release\webappsstore.sqlite to %APPDATA%\thunderbird\profiles\npsdfqy3.default-release\webappsstore.sqlite.crypted
  • from %APPDATA%\thunderbird\profiles\npsdfqy3.default-release\extensions.json to %APPDATA%\thunderbird\profiles\npsdfqy3.default-release\extensions.json.crypted
  • from %APPDATA%\thunderbird\profiles\npsdfqy3.default-release\xulstore.json to %APPDATA%\thunderbird\profiles\npsdfqy3.default-release\xulstore.json.crypted
  • from %APPDATA%\thunderbird\profiles\npsdfqy3.default-release\extension-preferences.json to %APPDATA%\thunderbird\profiles\npsdfqy3.default-release\extension-preferences.json.crypted
  • from %APPDATA%\thunderbird\profiles\npsdfqy3.default-release\directorytree.json to %APPDATA%\thunderbird\profiles\npsdfqy3.default-release\directorytree.json.crypted
  • from %APPDATA%\microsoft\protect\credhist to %APPDATA%\microsoft\protect\credhist.crypted
  • from %APPDATA%\microsoft\protect\s-1-5-21-1238866942-1249195528-555854008-1000\71e6321a-7203-4cd6-882b-58bcea299d05 to %APPDATA%\microsoft\protect\s-1-5-21-1238866942-1249195528-555854008-1000\71e6321a-7203-4cd6-882b-58bcea299d05.crypted
  • from %APPDATA%\microsoft\protect\s-1-5-21-1238866942-1249195528-555854008-1000\ec2e5fbc-5cd2-48b5-bd25-b5b2c4d33d98 to %APPDATA%\microsoft\protect\s-1-5-21-1238866942-1249195528-555854008-1000\ec2e5fbc-5cd2-48b5-bd25-b5b2c4d33d98.crypted
  • from %APPDATA%\microsoft\protect\s-1-5-21-1238866942-1249195528-555854008-1000\preferred to %APPDATA%\microsoft\protect\s-1-5-21-1238866942-1249195528-555854008-1000\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\49zr3fqa.default\times.json to %APPDATA%\thunderbird\profiles\49zr3fqa.default\times.json.crypted
  • from %APPDATA%\thunderbird\profiles\npsdfqy3.default-release\abook.sqlite to %APPDATA%\thunderbird\profiles\npsdfqy3.default-release\abook.sqlite.crypted
  • from %APPDATA%\thunderbird\profiles\npsdfqy3.default-release\addons.json to %APPDATA%\thunderbird\profiles\npsdfqy3.default-release\addons.json.crypted
  • from %APPDATA%\thunderbird\profiles\npsdfqy3.default-release\addonstartup.json.lz4 to %APPDATA%\thunderbird\profiles\npsdfqy3.default-release\addonstartup.json.lz4.crypted
  • from %APPDATA%\thunderbird\profiles\npsdfqy3.default-release\blist.sqlite to %APPDATA%\thunderbird\profiles\npsdfqy3.default-release\blist.sqlite.crypted
  • from %APPDATA%\thunderbird\profiles\npsdfqy3.default-release\compatibility.ini to %APPDATA%\thunderbird\profiles\npsdfqy3.default-release\compatibility.ini.crypted
  • from %APPDATA%\thunderbird\profiles\npsdfqy3.default-release\cookies.sqlite to %APPDATA%\thunderbird\profiles\npsdfqy3.default-release\cookies.sqlite.crypted
  • from %APPDATA%\thunderbird\profiles\npsdfqy3.default-release\crashes\store.json.mozlz4 to %APPDATA%\thunderbird\profiles\npsdfqy3.default-release\crashes\store.json.mozlz4.crypted
  • from %APPDATA%\thunderbird\profiles\npsdfqy3.default-release\datareporting\archived\2022-09\1664411763506.e60182f3-3480-48d0-bc12-b3b897042a6b.new-profile.jsonlz4 to %APPDATA%\thunderbird\profiles\npsdfqy3.default-release\datareporting\archived\2022-09\1664411763506.e60182f3-3480-48d0-bc12-b3b897042a6b.new-profile.jsonlz4.crypted
  • from %APPDATA%\thunderbird\profiles\npsdfqy3.default-release\datareporting\archived\2022-09\1664411764034.d092fa80-6cc0-49cc-9da4-f67b3d6cdc55.main.jsonlz4 to %APPDATA%\thunderbird\profiles\npsdfqy3.default-release\datareporting\archived\2022-09\1664411764034.d092fa80-6cc0-49cc-9da4-f67b3d6cdc55.main.jsonlz4.crypted
  • from %APPDATA%\thunderbird\profiles\npsdfqy3.default-release\datareporting\archived\2022-09\1664411764036.a6077284-6dcc-4781-9fb7-7f9d7b5132bf.first-shutdown.jsonlz4 to %APPDATA%\thunderbird\profiles\npsdfqy3.default-release\datareporting\archived\2022-09\1664411764036.a6077284-6dcc-4781-9fb7-7f9d7b5132bf.first-shutdown.jsonlz4.crypted
  • from %APPDATA%\thunderbird\profiles\npsdfqy3.default-release\datareporting\session-state.json to %APPDATA%\thunderbird\profiles\npsdfqy3.default-release\datareporting\session-state.json.crypted
  • from %APPDATA%\thunderbird\profiles\npsdfqy3.default-release\datareporting\state.json to %APPDATA%\thunderbird\profiles\npsdfqy3.default-release\datareporting\state.json.crypted
  • from %APPDATA%\thunderbird\profiles\npsdfqy3.default-release\enigmail.sqlite to %APPDATA%\thunderbird\profiles\npsdfqy3.default-release\enigmail.sqlite.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>:\archer.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.

Download Dr.Web

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