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Trojan.Encoder.41103

Added to the Dr.Web virus database: 2024-10-06

Virus description added:

Technical Information

To ensure autorun and distribution
Modifies master boot record (MBR).
Malicious functions
To complicate detection of its presence in the operating system,
deletes volume shadow copies.
Reads files which store third party applications passwords
  • %HOMEPATH%\desktop\000814251_video_01.avi
  • %HOMEPATH%\desktop\advice_process.htm
  • %HOMEPATH%\desktop\dashborder_120.bmp
  • %HOMEPATH%\desktop\dashborder_96.bmp
  • %HOMEPATH%\desktop\default.bmp
  • %HOMEPATH%\desktop\file_p_00000000_1371597592.docx
  • %HOMEPATH%\desktop\glidescope_review_rev_010.docx
  • %HOMEPATH%\desktop\holycrosschurchinstructions.docx
  • %HOMEPATH%\desktop\join.avi
  • %HOMEPATH%\desktop\ovp25012015.doc
  • %HOMEPATH%\desktop\pmd.cer
  • %HOMEPATH%\desktop\testcertificate.cer
  • %HOMEPATH%\desktop\toolbar.bmp
  • %HOMEPATH%\desktop\tree_view.htm
Modifies file system
Creates the following files
  • globalroot\device\harddisk0\partition1
  • C:\users\public\documents\my videos\sample videos\desktop.ini
  • C:\users\public\documents\my videos\desktop.ini
  • C:\users\public\documents\my pictures\sample pictures\tulips.jpg
  • C:\users\public\documents\my pictures\sample pictures\penguins.jpg
  • C:\users\public\documents\my pictures\sample pictures\lighthouse.jpg
  • C:\users\public\documents\my pictures\sample pictures\koala.jpg
  • C:\users\public\documents\my pictures\sample pictures\jellyfish.jpg
  • C:\users\public\documents\my pictures\sample pictures\hydrangeas.jpg
  • C:\users\public\documents\my pictures\sample pictures\desktop.ini
  • C:\users\public\documents\my pictures\sample pictures\desert.jpg
  • C:\users\public\documents\my pictures\sample pictures\chrysanthemum.jpg
  • C:\users\public\documents\my pictures\desktop.ini
  • C:\users\public\documents\my music\sample music\sleep away.mp3
  • C:\users\public\documents\my music\sample music\maid with the flaxen hair.mp3
  • C:\users\public\documents\my music\sample music\kalimba.mp3
  • C:\users\public\documents\my music\sample music\desktop.ini
  • C:\users\public\documents\my music\desktop.ini
  • %HOMEPATH%\documents\my videos\desktop.ini
  • %HOMEPATH%\documents\my pictures\desktop.ini
  • %HOMEPATH%\documents\my music\desktop.ini
  • globalroot\device\harddisk1\partition1
  • globalroot\device\harddisk0\partition3
  • globalroot\device\harddisk0\partition2
  • C:\users\public\documents\my videos\sample videos\wildlife.wmv
  • C:\documents and settings\all users\adobe\setup\{ac76ba86-7ad7-1033-7b44-ac0f074e4100}\abcpy.ini
Deletes the following files
  • %WINDIR%\boot\dvd\efi\bcd
  • %WINDIR%\boot\pcat\da-dk\bootmgr.exe.mui
  • %WINDIR%\boot\pcat\cs-cz\bootmgr.exe.mui
  • %WINDIR%\boot\pcat\bootmgr
  • %WINDIR%\boot\fonts\wgl4_boot.ttf
  • %WINDIR%\boot\fonts\kor_boot.ttf
  • %WINDIR%\boot\fonts\jpn_boot.ttf
  • %WINDIR%\boot\fonts\cht_boot.ttf
  • %WINDIR%\boot\fonts\chs_boot.ttf
  • %WINDIR%\boot\efi\ru-ru\bootmgfw.efi.mui
  • %WINDIR%\boot\efi\zh-tw\bootmgr.efi.mui
  • %WINDIR%\boot\efi\zh-hk\bootmgr.efi.mui
  • %WINDIR%\boot\efi\zh-hk\bootmgfw.efi.mui
  • %WINDIR%\boot\efi\zh-cn\bootmgr.efi.mui
  • %WINDIR%\boot\efi\zh-cn\bootmgfw.efi.mui
  • %WINDIR%\boot\efi\tr-tr\bootmgr.efi.mui
  • %WINDIR%\boot\efi\tr-tr\bootmgfw.efi.mui
  • %WINDIR%\boot\efi\sv-se\bootmgr.efi.mui
  • %WINDIR%\boot\efi\sv-se\bootmgfw.efi.mui
  • %WINDIR%\boot\efi\zh-tw\bootmgfw.efi.mui
  • %WINDIR%\boot\efi\ru-ru\bootmgr.efi.mui
  • %WINDIR%\boot\pcat\de-de\bootmgr.exe.mui
  • %WINDIR%\boot\pcat\memtest.exe
  • %WINDIR%\boot\pcat\zh-cn\bootmgr.exe.mui
  • %WINDIR%\boot\pcat\tr-tr\bootmgr.exe.mui
  • %WINDIR%\boot\pcat\sv-se\bootmgr.exe.mui
  • %WINDIR%\boot\pcat\ru-ru\bootmgr.exe.mui
  • %WINDIR%\boot\pcat\pt-pt\bootmgr.exe.mui
  • %WINDIR%\boot\pcat\pt-br\bootmgr.exe.mui
  • %WINDIR%\boot\pcat\pl-pl\bootmgr.exe.mui
  • %WINDIR%\boot\pcat\nl-nl\bootmgr.exe.mui
  • %WINDIR%\boot\pcat\en-us\bootmgr.exe.mui
  • %WINDIR%\boot\pcat\el-gr\bootmgr.exe.mui
  • %WINDIR%\boot\pcat\ko-kr\bootmgr.exe.mui
  • %WINDIR%\boot\pcat\ja-jp\bootmgr.exe.mui
  • %WINDIR%\boot\pcat\it-it\bootmgr.exe.mui
  • %WINDIR%\boot\pcat\hu-hu\bootmgr.exe.mui
  • %WINDIR%\boot\pcat\fr-fr\bootmgr.exe.mui
  • %WINDIR%\boot\pcat\fi-fi\bootmgr.exe.mui
  • %WINDIR%\boot\pcat\es-es\bootmgr.exe.mui
  • %WINDIR%\boot\pcat\en-us\memtest.exe.mui
  • %WINDIR%\boot\pcat\nb-no\bootmgr.exe.mui
  • %WINDIR%\boot\efi\pt-pt\bootmgr.efi.mui
  • %WINDIR%\boot\efi\pt-pt\bootmgfw.efi.mui
  • %WINDIR%\boot\efi\pt-br\bootmgr.efi.mui
  • %WINDIR%\boot\efi\en-us\bootmgfw.efi.mui
  • %WINDIR%\boot\efi\el-gr\bootmgr.efi.mui
  • %WINDIR%\boot\efi\el-gr\bootmgfw.efi.mui
  • %WINDIR%\boot\efi\de-de\bootmgr.efi.mui
  • %WINDIR%\boot\efi\de-de\bootmgfw.efi.mui
  • %WINDIR%\boot\efi\da-dk\bootmgr.efi.mui
  • %WINDIR%\boot\efi\da-dk\bootmgfw.efi.mui
  • %WINDIR%\boot\efi\en-us\memtest.efi.mui
  • %WINDIR%\boot\efi\cs-cz\bootmgr.efi.mui
  • %WINDIR%\boot\efi\bootmgr.efi
  • %WINDIR%\boot\efi\bootmgfw.efi
  • %WINDIR%\boot\dvd\pcat\etfsboot.com
  • %WINDIR%\boot\dvd\pcat\en-us\bootfix.bin
  • %WINDIR%\boot\dvd\pcat\boot.sdi
  • %WINDIR%\boot\dvd\pcat\bcd
  • %WINDIR%\boot\dvd\efi\en-us\efisys.bin
  • %WINDIR%\boot\dvd\efi\boot.sdi
  • %WINDIR%\boot\efi\cs-cz\bootmgfw.efi.mui
  • %WINDIR%\boot\efi\es-es\bootmgfw.efi.mui
  • %WINDIR%\boot\efi\en-us\bootmgr.efi.mui
  • %WINDIR%\boot\efi\es-es\bootmgr.efi.mui
  • %WINDIR%\boot\efi\pt-br\bootmgfw.efi.mui
  • %WINDIR%\boot\efi\ko-kr\bootmgfw.efi.mui
  • %WINDIR%\boot\efi\pl-pl\bootmgr.efi.mui
  • %WINDIR%\boot\efi\pl-pl\bootmgfw.efi.mui
  • %WINDIR%\boot\efi\nl-nl\bootmgr.efi.mui
  • %WINDIR%\boot\efi\nl-nl\bootmgfw.efi.mui
  • %WINDIR%\boot\efi\nb-no\bootmgr.efi.mui
  • %WINDIR%\boot\efi\nb-no\bootmgfw.efi.mui
  • %WINDIR%\boot\efi\memtest.efi
  • %WINDIR%\boot\efi\ko-kr\bootmgr.efi.mui
  • %WINDIR%\boot\efi\ja-jp\bootmgr.efi.mui
  • %WINDIR%\boot\efi\fi-fi\bootmgfw.efi.mui
  • %WINDIR%\boot\efi\ja-jp\bootmgfw.efi.mui
  • %WINDIR%\boot\efi\it-it\bootmgr.efi.mui
  • %WINDIR%\boot\efi\it-it\bootmgfw.efi.mui
  • %WINDIR%\boot\efi\hu-hu\bootmgr.efi.mui
  • %WINDIR%\boot\efi\hu-hu\bootmgfw.efi.mui
  • %WINDIR%\boot\efi\fr-fr\bootmgr.efi.mui
  • %WINDIR%\boot\efi\fr-fr\bootmgfw.efi.mui
  • %WINDIR%\boot\efi\fi-fi\bootmgr.efi.mui
  • %WINDIR%\boot\pcat\zh-hk\bootmgr.exe.mui
  • %WINDIR%\boot\pcat\zh-tw\bootmgr.exe.mui
Moves the following files
  • from %HOMEPATH%\documents\my music\desktop.ini to %HOMEPATH%\documents\my music\desktop.ini.fck
  • from %HOMEPATH%\documents\my pictures\desktop.ini to %HOMEPATH%\documents\my pictures\desktop.ini.fck
  • from %HOMEPATH%\documents\my videos\desktop.ini to %HOMEPATH%\documents\my videos\desktop.ini.fck
  • from C:\users\public\documents\my music\desktop.ini to C:\users\public\documents\my music\desktop.ini.fck
  • from C:\users\public\documents\my music\sample music\desktop.ini to C:\users\public\documents\my music\sample music\desktop.ini.fck
  • from C:\users\public\documents\my music\sample music\kalimba.mp3 to C:\users\public\documents\my music\sample music\kalimba.mp3.fck
  • from C:\users\public\documents\my music\sample music\maid with the flaxen hair.mp3 to C:\users\public\documents\my music\sample music\maid with the flaxen hair.mp3.fck
  • from C:\users\public\documents\my music\sample music\sleep away.mp3 to C:\users\public\documents\my music\sample music\sleep away.mp3.fck
  • from C:\users\public\documents\my pictures\desktop.ini to C:\users\public\documents\my pictures\desktop.ini.fck
  • from C:\users\public\documents\my pictures\sample pictures\desktop.ini to C:\users\public\documents\my pictures\sample pictures\desktop.ini.fck
  • from C:\users\public\documents\my videos\desktop.ini to C:\users\public\documents\my videos\desktop.ini.fck
  • from C:\users\public\documents\my videos\sample videos\desktop.ini to C:\users\public\documents\my videos\sample videos\desktop.ini.fck
  • from C:\documents and settings\all users\adobe\setup\{ac76ba86-7ad7-1033-7b44-ac0f074e4100}\abcpy.ini to C:\documents and settings\all users\adobe\setup\{ac76ba86-7ad7-1033-7b44-ac0f074e4100}\abcpy.ini.fck
Modifies the following files
  • %HOMEPATH%\desktop\000814251_video_01.avi
  • %HOMEPATH%\favorites\msn websites\msn money.url
  • %HOMEPATH%\favorites\msn websites\msn entertainment.url
  • %HOMEPATH%\favorites\msn websites\msn autos.url
  • %HOMEPATH%\favorites\microsoft websites\microsoft store.url
  • %HOMEPATH%\favorites\microsoft websites\microsoft at work.url
  • %HOMEPATH%\favorites\microsoft websites\microsoft at home.url
  • %HOMEPATH%\favorites\microsoft websites\ie site on microsoft.com.url
  • %HOMEPATH%\favorites\microsoft websites\ie add-on site.url
  • %HOMEPATH%\favorites\links for united states\usa.gov.url
  • %HOMEPATH%\favorites\links for united states\gobiernousa.gov.url
  • %HOMEPATH%\favorites\links for united states\desktop.ini
  • %HOMEPATH%\favorites\links\web slice gallery.url
  • %HOMEPATH%\favorites\links\desktop.ini
  • %HOMEPATH%\favorites\desktop.ini
  • %HOMEPATH%\downloads\desktop.ini
  • %HOMEPATH%\documents\desktop.ini
  • %HOMEPATH%\desktop\telegram.lnk
  • %HOMEPATH%\desktop\join.avi
  • %HOMEPATH%\desktop\holycrosschurchinstructions.docx
  • %HOMEPATH%\desktop\google chrome.lnk
  • %HOMEPATH%\desktop\glidescope_review_rev_010.docx
  • %HOMEPATH%\desktop\file_p_00000000_1371597592.docx
  • %HOMEPATH%\desktop\desktop.ini
  • %HOMEPATH%\desktop\default.bmp
  • %HOMEPATH%\desktop\dashborder_96.bmp
  • %HOMEPATH%\desktop\dashborder_120.bmp
  • %HOMEPATH%\desktop\advice_process.htm
  • %HOMEPATH%\favorites\msn websites\msn sports.url
  • %HOMEPATH%\favorites\msn websites\msn.url
Modifies multiple files.
Modifies user data files (Trojan.Encoder).
Changes user data files extensions (Trojan.Encoder).
Miscellaneous
Executes the following
  • '%WINDIR%\syswow64\reagentc.exe' /disable
  • '%WINDIR%\syswow64\powercfg.exe' /HIBERNATE OFF
  • '%WINDIR%\syswow64\wevtutil.exe' cl Application
  • '%WINDIR%\syswow64\wevtutil.exe' cl Security
  • '%WINDIR%\syswow64\wevtutil.exe' cl System
  • '%WINDIR%\syswow64\cscript.exe' <SYSTEM32>\slmgr.vbs /upk
  • '%WINDIR%\syswow64\vssadmin.exe' Delete Shadows /All /Quiet' (with hidden window)
  • '%WINDIR%\syswow64\wbem\wmic.exe' shadowcopy delete /nointeractive' (with hidden window)
  • '%WINDIR%\syswow64\reagentc.exe' /disable' (with hidden window)
  • '%WINDIR%\syswow64\powercfg.exe' /HIBERNATE OFF' (with hidden window)
  • '%WINDIR%\syswow64\wevtutil.exe' cl Application' (with hidden window)
  • '%WINDIR%\syswow64\wevtutil.exe' cl Security' (with hidden window)
  • '%WINDIR%\syswow64\wevtutil.exe' cl System' (with hidden window)
  • '%WINDIR%\syswow64\cscript.exe' <SYSTEM32>\slmgr.vbs /upk' (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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  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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