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Trojan.Hosts.51906
Added to the Dr.Web virus database:
2024-05-22
Virus description added:
2024-05-24
Technical Information
To ensure autorun and distribution
Modifies the following registry keys
[HKLM\SOFTWARE\Classes\NCH.PicoPDF.pdf\shell\open\command] '' = '"%ProgramFiles(x86)%\NCH Software\PicoPDF\picopdf.exe" "%L"'
[HKLM\SOFTWARE\Classes\Applications\picopdf.exe\shell\open\command] '' = '"%ProgramFiles(x86)%\NCH Software\PicoPDF\picopdf.exe" "%L"'
[HKCU\Software\Classes\cdofile\shell\open\command] '' = '"%ProgramFiles(x86)%\NCH Software\PicoPDF\picopdf.exe" -extfind Crescendo "%L"'
[HKCU\Software\Classes\dfxfile\shell\open\command] '' = '"%ProgramFiles(x86)%\NCH Software\PicoPDF\picopdf.exe" -extfind DeskFX "%L"'
[HKCU\Software\Classes\deprojfile\shell\open\command] '' = '"%ProgramFiles(x86)%\NCH Software\PicoPDF\picopdf.exe" -extfind Disketch "%L"'
[HKCU\Software\Classes\drpfile\shell\open\command] '' = '"%ProgramFiles(x86)%\NCH Software\PicoPDF\picopdf.exe" -extfind DrawPad "%L"'
[HKCU\Software\Classes\ddpfile\shell\open\command] '' = '"%ProgramFiles(x86)%\NCH Software\PicoPDF\picopdf.exe" -extfind DreamPlan "%L"'
[HKCU\Software\Classes\apjfile\shell\open\command] '' = '"%ProgramFiles(x86)%\NCH Software\PicoPDF\picopdf.exe" -extfind ExpressAnimate "%L"'
[HKCU\Software\Classes\nppfile\shell\open\command] '' = '"%ProgramFiles(x86)%\NCH Software\PicoPDF\picopdf.exe" -extfind ExpressPoints "%L"'
[HKCU\Software\Classes\mpdpfile\shell\open\command] '' = '"%ProgramFiles(x86)%\NCH Software\PicoPDF\picopdf.exe" -extfind MixPad "%L"'
[HKCU\Software\Classes\dctfile\shell\open\command] '' = '"%ProgramFiles(x86)%\NCH Software\PicoPDF\picopdf.exe" -extfind Scribe "%L"'
[HKCU\Software\Classes\dssfile\shell\open\command] '' = '"%ProgramFiles(x86)%\NCH Software\PicoPDF\picopdf.exe" -extfind Scribe "%L"'
[HKCU\Software\Classes\ds2file\shell\open\command] '' = '"%ProgramFiles(x86)%\NCH Software\PicoPDF\picopdf.exe" -extfind Scribe "%L"'
[HKCU\Software\Classes\vpjfile\shell\open\command] '' = '"%ProgramFiles(x86)%\NCH Software\PicoPDF\picopdf.exe" -extfind VideoPad "%L"'
[HKCU\Software\Classes\spjfile\shell\open\command] '' = '"%ProgramFiles(x86)%\NCH Software\PicoPDF\picopdf.exe" -extfind PhotoStage "%L"'
Creates or modifies the following files
<SYSTEM32>\tasks\nch software\picopdfsevendays
Modifies file system
Creates the following files
%TEMP%\aut738a.tmp
%ALLUSERSPROFILE%\microsoft\windows\start menu\programs\nch software suite\invoice software.lnk
%ALLUSERSPROFILE%\microsoft\windows\start menu\programs\nch software suite\video file converter.lnk
%ALLUSERSPROFILE%\microsoft\windows\start menu\programs\nch software suite\slideshow software.lnk
%ALLUSERSPROFILE%\microsoft\windows\start menu\programs\nch software suite\multitrack recording software.lnk
%ALLUSERSPROFILE%\microsoft\windows\start menu\programs\nch software suite\accounting software.lnk
%ALLUSERSPROFILE%\microsoft\windows\start menu\programs\nch software suite\transcription software.lnk
%ALLUSERSPROFILE%\microsoft\windows\start menu\programs\nch software suite\express burn cd, dvd or blu-ray.lnk
%ALLUSERSPROFILE%\microsoft\windows\start menu\programs\nch software suite\photo editing software.lnk
%ALLUSERSPROFILE%\microsoft\windows\start menu\programs\nch software suite\house design software.lnk
%ALLUSERSPROFILE%\microsoft\windows\start menu\programs\nch software suite\doxillion document converter.lnk
%ALLUSERSPROFILE%\microsoft\windows\start menu\programs\nch software suite\zip program.lnk
%ALLUSERSPROFILE%\microsoft\windows\start menu\programs\nch software suite\text expander software.lnk
%ALLUSERSPROFILE%\microsoft\windows\start menu\programs\nch software suite\classic ftp software.lnk
%ALLUSERSPROFILE%\microsoft\windows\start menu\programs\nch software suite\image file converter.lnk
%ALLUSERSPROFILE%\microsoft\windows\start menu\programs\nch software suite\diagram and flowchart software.lnk
%ALLUSERSPROFILE%\microsoft\windows\start menu\programs\nch software suite\audio file converter.lnk
%ALLUSERSPROFILE%\microsoft\windows\start menu\programs\nch software suite\video capture software.lnk
%ALLUSERSPROFILE%\microsoft\windows\start menu\programs\nch software suite\audio editing software.lnk
%TEMP%\aut8066.tmp
%TEMP%\softtrack\setup.exe
%TEMP%\n1s\nchsetup.cab
%TEMP%\n1s\nchsetup.exe
%TEMP%\n1s\nchdata.cab
%TEMP%\n1s\nchdata.dat
%TEMP%\softtrack\vidbanner.mp4
%ProgramFiles(x86)%\nch software\picopdf\picopdf.exe
%ProgramFiles(x86)%\nch software\picopdf\shellmenua.msix
%ProgramFiles(x86)%\nch software\picopdf\shellmenub.msix
C:\users\public\desktop\nch suite.lnk
%ALLUSERSPROFILE%\microsoft\windows\start menu\programs\picopdf pdf editor.lnk
C:\users\public\desktop\picopdf pdf editor.lnk
%ALLUSERSPROFILE%\microsoft\windows\start menu\programs\nch software suite\video editing software.lnk
%ProgramFiles(x86)%\nch software\picopdf\shellmenu.dll
%HOMEPATH%\favorites\nch software download site.lnk
%ProgramFiles(x86)%\nch software\picopdf\picopdfsetup_v6.16.exe
Deletes the following files
%TEMP%\aut738a.tmp
%TEMP%\aut8066.tmp
%TEMP%\n1s\nchdata.cab
%TEMP%\n1s\nchsetup.exe
%TEMP%\n1s\nchdata.dat
%TEMP%\n1s\nchsetup.cab
%TEMP%\softtrack\setup.exe
%TEMP%\softtrack\vidbanner.mp4
Modifies the following files
%LOCALAPPDATA%\microsoft\media player\currentdatabase_372.wmdb
Modifies the HOSTS file.
Miscellaneous
Searches for the following windows
ClassName: 'WMPlayerApp' WindowName: ''
ClassName: 'NCHSoftware_InstanceWindow' WindowName: 'PicoPDF'
ClassName: 'NCHSoftware_InstanceChain' WindowName: 'PicoPDF'
ClassName: 'NCHSoftware_InstanceInst' WindowName: 'PicoPDF'
ClassName: 'NCHSoftware_InstanceBoot' WindowName: 'PicoPDF'
ClassName: 'BUTTON' WindowName: ''
Creates and executes the following
'%TEMP%\softtrack\setup.exe' -LQUIET
'%TEMP%\n1s\nchsetup.exe' -installer "%TEMP%\softtrack\setup.exe" -instdata "%TEMP%\n1s\nchdata.dat"
'%ProgramFiles(x86)%\nch software\picopdf\picopdf.exe' -installsched
Curing recommendations
Windows
macOS
Linux
Android
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 .
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.
Use Dr.Web Anti-virus for macOS to run a full scan of your Mac.
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.
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
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