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Win32.HLLW.Autoruner2.63462
Added to the Dr.Web virus database:
2019-10-01
Virus description added:
2019-10-02
Technical Information
To ensure autorun and distribution
Modifies the following registry keys
[<HKLM>\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Run] 'rrznz68mkaaJ' = '"%APPDATA%\Syscall\Syscall.exe"'
[<HKCU>\Software\Microsoft\Windows NT\CurrentVersion\Windows] 'Load' = '%APPDATA%\Syscall\Syscall.exe'
Creates the following files on removable media
<Drive name for removable media>:\rummy.exe
<Drive name for removable media>:\applicantform_en.doc.lnk
<Drive name for removable media>:\weeklysheet1215.doc.lnk
<Drive name for removable media>:\lisp_success.doc.lnk
<Drive name for removable media>:\pmd.cer.lnk
<Drive name for removable media>:\contoso_1.cer.lnk
<Drive name for removable media>:\testcertificate.cer.lnk
<Drive name for removable media>:\sdksampleprivdeveloper.cer.lnk
<Drive name for removable media>:\contosoroot.cer.lnk
<Drive name for removable media>:\dashborder_192.bmp.lnk
<Drive name for removable media>:\toolbar.bmp.lnk
<Drive name for removable media>:\dashborder_144.bmp.lnk
<Drive name for removable media>:\dashborder_96.bmp.lnk
<Drive name for removable media>:\dashborder_120.bmp.lnk
<Drive name for removable media>:\dialmap.bmp.lnk
<Drive name for removable media>:\000814251_video_01.avi.lnk
<Drive name for removable media>:\split.avi.lnk
<Drive name for removable media>:\correct.avi.lnk
<Drive name for removable media>:\508softwareandos.doc.lnk
<Drive name for removable media>:\february_catalogue__2015.doc.lnk
Malicious functions
Injects code into
the following system processes:
%WINDIR%\microsoft.net\framework\v2.0.50727\cvtres.exe
Modifies file system
Creates the following files
%APPDATA%\syscall\3735.xml
%APPDATA%\imminent\logs\30-09-2019
Sets the 'hidden' attribute to the following files
<Drive name for removable media>:\rummy.exe
Deletes the following files
<Drive name for removable media>:\correct.avi.lnk
<Drive name for removable media>:\applicantform_en.doc.lnk
<Drive name for removable media>:\weeklysheet1215.doc.lnk
<Drive name for removable media>:\lisp_success.doc.lnk
<Drive name for removable media>:\pmd.cer.lnk
<Drive name for removable media>:\contoso_1.cer.lnk
<Drive name for removable media>:\testcertificate.cer.lnk
<Drive name for removable media>:\sdksampleprivdeveloper.cer.lnk
<Drive name for removable media>:\508softwareandos.doc.lnk
<Drive name for removable media>:\contosoroot.cer.lnk
<Drive name for removable media>:\toolbar.bmp.lnk
<Drive name for removable media>:\dashborder_144.bmp.lnk
<Drive name for removable media>:\dashborder_96.bmp.lnk
<Drive name for removable media>:\dashborder_120.bmp.lnk
<Drive name for removable media>:\dialmap.bmp.lnk
<Drive name for removable media>:\000814251_video_01.avi.lnk
<Drive name for removable media>:\split.avi.lnk
<Drive name for removable media>:\dashborder_192.bmp.lnk
<Drive name for removable media>:\february_catalogue__2015.doc.lnk
Moves the following files
from %APPDATA%\syscall\3735.xml to %APPDATA%\syscall\syscall.exe
Substitutes the following files
<Drive name for removable media>:\correct.avi.lnk
<Drive name for removable media>:\applicantform_en.doc.lnk
<Drive name for removable media>:\weeklysheet1215.doc.lnk
<Drive name for removable media>:\lisp_success.doc.lnk
<Drive name for removable media>:\pmd.cer.lnk
<Drive name for removable media>:\contoso_1.cer.lnk
<Drive name for removable media>:\testcertificate.cer.lnk
<Drive name for removable media>:\sdksampleprivdeveloper.cer.lnk
<Drive name for removable media>:\508softwareandos.doc.lnk
<Drive name for removable media>:\contosoroot.cer.lnk
<Drive name for removable media>:\toolbar.bmp.lnk
<Drive name for removable media>:\dashborder_144.bmp.lnk
<Drive name for removable media>:\dashborder_96.bmp.lnk
<Drive name for removable media>:\dashborder_120.bmp.lnk
<Drive name for removable media>:\dialmap.bmp.lnk
<Drive name for removable media>:\000814251_video_01.avi.lnk
<Drive name for removable media>:\split.avi.lnk
<Drive name for removable media>:\dashborder_192.bmp.lnk
<Drive name for removable media>:\february_catalogue__2015.doc.lnk
Network activity
UDP
DNS ASK ca####ilz.ddns.net
Miscellaneous
Creates and executes the following
'%WINDIR%\microsoft.net\framework\v2.0.50727\regasm.exe' ' (with hidden window)
Executes the following
'%WINDIR%\microsoft.net\framework\v2.0.50727\regasm.exe'
'%WINDIR%\microsoft.net\framework\v2.0.50727\cvtres.exe' -%APPDATA%\Syscall\Syscall.exe
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