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Trojan.Encoder.38969

Added to the Dr.Web virus database: 2024-05-28

Virus description added:

Technical Information

To ensure autorun and distribution
Creates the following files on removable media
  • <Drive name for removable media>:\how to restore your files.txt
  • <Drive name for removable media>:\skypesetup.exe
  • <Drive name for removable media>:\tcm851ax32.exe
  • <Drive name for removable media>:\jre-7u75-windows-i586-iftw.exe
  • <Drive name for removable media>:\chromesetup.exe
  • <Drive name for removable media>:\calc.exe
  • <Drive name for removable media>:\winmine.exe
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
Modifies file system
Creates the following files
  • C:\kms\how to restore your files.txt
  • %HOMEPATH%\documents\my videos\how to restore your files.txt
  • %HOMEPATH%\documents\my music\how to restore your files.txt
  • %HOMEPATH%\documents\how to restore your files.txt
  • %HOMEPATH%\desktop\how to restore your files.txt
  • %HOMEPATH%\cookies\how to restore your files.txt
  • %HOMEPATH%\favorites\how to restore your files.txt
  • %HOMEPATH%\contacts\how to restore your files.txt
  • %HOMEPATH%\how to restore your files.txt
  • C:\users\public\videos\sample videos\how to restore your files.txt
  • C:\users\public\recorded tv\sample media\how to restore your files.txt
  • C:\users\public\recorded tv\how to restore your files.txt
  • C:\users\public\pictures\sample pictures\how to restore your files.txt
  • C:\users\public\libraries\how to restore your files.txt
  • %HOMEPATH%\application data\how to restore your files.txt
  • C:\users\default\start menu\how to restore your files.txt
  • %HOMEPATH%\documents\my pictures\how to restore your files.txt
  • %HOMEPATH%\templates\how to restore your files.txt
  • %HOMEPATH%\start menu\how to restore your files.txt
  • %HOMEPATH%\sendto\how to restore your files.txt
  • %HOMEPATH%\searches\how to restore your files.txt
  • %HOMEPATH%\saved games\how to restore your files.txt
  • %HOMEPATH%\recent\how to restore your files.txt
  • C:\users\public\music\sample music\how to restore your files.txt
  • %HOMEPATH%\downloads\how to restore your files.txt
  • %HOMEPATH%\local settings\how to restore your files.txt
  • %HOMEPATH%\links\how to restore your files.txt
  • %HOMEPATH%\favorites\windows live\how to restore your files.txt
  • %HOMEPATH%\favorites\msn websites\how to restore your files.txt
  • %HOMEPATH%\favorites\microsoft websites\how to restore your files.txt
  • %HOMEPATH%\favorites\links for united states\how to restore your files.txt
  • %HOMEPATH%\nethood\how to restore your files.txt
  • %HOMEPATH%\favorites\links\how to restore your files.txt
  • C:\users\public\documents\my videos\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
  • C:\recovery\how to restore your files.txt
  • C:\how to restore your files.txt
  • <Current directory>\how to restore your files.txt
  • C:\documents and settings\how to restore your files.txt
  • C:\perflogs\how to restore your files.txt
  • C:\perflogs\admin\how to restore your files.txt
  • D:\how to restore your files.txt
  • C:\msocache\how to restore your files.txt
  • C:\users\default\documents\my videos\how to restore your files.txt
  • C:\users\default\desktop\how to restore your files.txt
  • C:\users\default\documents\how to restore your files.txt
  • C:\users\default\how to restore your files.txt
  • C:\users\default\documents\my music\how to restore your files.txt
  • C:\users\default\documents\my pictures\how to restore your files.txt
  • C:\recovery\4cc8e8a4-51d2-11ee-b826-9a90d4dcffb5\how to restore your files.txt
  • %HOMEPATH%\printhood\how to restore your files.txt
  • C:\users\default\downloads\how to restore your files.txt
  • C:\users\default\local settings\how to restore your files.txt
  • C:\users\default\links\how to restore your files.txt
  • C:\users\default\sendto\how to restore your files.txt
  • C:\users\public\documents\my pictures\how to restore your files.txt
  • C:\users\public\documents\my music\how to restore your files.txt
  • C:\users\public\documents\how to restore your files.txt
  • C:\users\public\desktop\how to restore your files.txt
  • C:\users\default\favorites\how to restore your files.txt
  • C:\users\public\how to restore your files.txt
  • C:\users\default\application data\how to restore your files.txt
  • C:\users\default\saved games\how to restore your files.txt
  • C:\users\default\recent\how to restore your files.txt
  • C:\users\default\nethood\how to restore your files.txt
  • C:\users\default\cookies\how to restore your files.txt
  • C:\users\default\printhood\how to restore your files.txt
  • C:\users\default\templates\how to restore your files.txt
  • m:\how to restore your files.txt
Modifies the following files
  • C:\kms\kms_vl_all_aio.cmd.17244690
  • %HOMEPATH%\desktop\telegram.lnk.972198aa
  • %HOMEPATH%\desktop\google chrome.lnk.484f7b09
  • %HOMEPATH%\contacts\user.contact.b683b41e
  • C:\users\public\pictures\sample pictures\chrysanthemum.jpg.0a70b81e
  • C:\users\public\videos\sample videos\wildlife.wmv.a3fa782d
  • C:\users\public\recorded tv\sample media\win7_scenic-demoshort_raw.wtv.48c6f955
  • C:\users\public\pictures\sample pictures\tulips.jpg.13a6568d
  • C:\users\public\pictures\sample pictures\jellyfish.jpg.9a4e8a2e
  • C:\users\public\pictures\sample pictures\desert.jpg.7a007501
  • C:\users\public\pictures\sample pictures\penguins.jpg.517e30f0
  • C:\users\public\desktop\firefox.lnk.e7557efa
  • C:\users\public\libraries\recordedtv.library-ms.8634fbb8
  • C:\users\public\music\sample music\sleep away.mp3.216e365c
  • C:\users\public\music\sample music\maid with the flaxen hair.mp3.a92b9e69
  • C:\users\public\music\sample music\kalimba.mp3.247cb78e
  • C:\users\public\desktop\acrobat reader dc.lnk.cfbce9b3
  • C:\users\public\desktop\mozilla thunderbird.lnk.396c9f00
  • C:\users\public\desktop\opera.lnk.db1f58a5
  • C:\users\public\desktop\steam.lnk.6928a034
  • C:\users\default\ntuser.dat{016888bd-6c6f-11de-8d1d-001e0bcde3ec}.tmcontainer00000000000000000002.regtrans-ms.bcef7ca1
  • C:\users\default\ntuser.dat{016888bd-6c6f-11de-8d1d-001e0bcde3ec}.tmcontainer00000000000000000001.regtrans-ms.d367297d
  • C:\users\default\ntuser.dat.log1.fac97ab2
  • C:\users\default\ntuser.dat{016888bd-6c6f-11de-8d1d-001e0bcde3ec}.tm.blf.69a870c5
  • C:\recovery\4cc8e8a4-51d2-11ee-b826-9a90d4dcffb5\winre.wim.b1a4a367
  • C:\users\default\ntuser.dat.log2.2bea21c0
  • C:\recovery\4cc8e8a4-51d2-11ee-b826-9a90d4dcffb5\boot.sdi.e5b06a91
  • C:\kms\kms_vl_all_aio_debug.log.5620853d
  • %HOMEPATH%\favorites\links for united states\usa.gov.url.96bd7c6e
  • %HOMEPATH%\favorites\links\web slice gallery.url.c5f4c19a
Modifies multiple files.
Moves itself
  • from <Full path to file> to <Full path to file>.a2aeaf34
Changes user data files extensions (Trojan.Encoder).
Miscellaneous
Executes the following
  • '<SYSTEM32>\cmd.exe' /c vssadmin.exe delete shadows /all /quiet
  • '<SYSTEM32>\cmd.exe' /c vssadmin.exe delete shadows /all /quiet' (with hidden window)

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