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Win32.HLLW.Autoruner.53447
Added to the Dr.Web virus database:
2011-07-06
Virus description added:
2011-07-07
Technical Information
To ensure autorun and distribution:
Modifies the following registry keys:
[<HKLM>\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon] 'Userinit' = '<SYSTEM32>\userinit.exe,<SYSTEM32>\system.exe run'
Creates or modifies the following files:
%HOMEPATH%\Start Menu\Programs\Startup\system32.exe
Creates the following files on removable media:
<Drive name for removable media>:\autorun.inf
<Drive name for removable media>:\SriLanka.exe
Malicious functions:
To complicate detection of its presence in the operating system,
forces the system hide from view:
hidden files
file extensions
Creates and executes the following:
%WINDIR%\Explore.exe run
%PROGRAM_FILES%\WindowsNT.exe run
<SYSTEM32>\system.exe run
%HOMEPATH%\Start Menu\Programs\Startup\system32.exe run
Terminates or attempts to terminate
the following user processes:
Modifies settings of Windows Explorer:
[<HKCU>\Software\Microsoft\Windows\CurrentVersion\Policies\Explorer] 'NoFolderOptions' = '00000000'
[<HKCU>\Software\Microsoft\Windows\CurrentVersion\Policies\Explorer] 'NoFind' = '00000000'
Forces autoplay for removable media.
Modifies file system :
Creates the following files:
%TEMP%\aut13.tmp
%TEMP%\aut12.tmp
%TEMP%\aut15.tmp
%TEMP%\aut14.tmp
%TEMP%\autF.tmp
%TEMP%\autE.tmp
%TEMP%\aut11.tmp
%TEMP%\aut10.tmp
%TEMP%\aut1B.tmp
%TEMP%\aut1A.tmp
%TEMP%\aut1D.tmp
%TEMP%\aut1C.tmp
%TEMP%\aut17.tmp
%TEMP%\aut16.tmp
%TEMP%\aut19.tmp
%TEMP%\aut18.tmp
%TEMP%\autD.tmp
%WINDIR%\autorun.inf
%TEMP%\aut2.tmp
%TEMP%\aut4.tmp
%TEMP%\aut3.tmp
<SYSTEM32>\system.exe
%TEMP%\aut1.tmp
%PROGRAM_FILES%\WindowsNT.exe
%WINDIR%\Explore.exe
%TEMP%\autA.tmp
%TEMP%\aut9.tmp
%TEMP%\autC.tmp
%TEMP%\autB.tmp
%TEMP%\aut6.tmp
%TEMP%\aut5.tmp
%TEMP%\aut8.tmp
%TEMP%\aut7.tmp
Sets the 'hidden' attribute to the following files:
<Drive name for removable media>:\autorun.inf
<Drive name for removable media>:\SriLanka.exe
%WINDIR%\autorun.inf
<SYSTEM32>\system.exe
%HOMEPATH%\Start Menu\Programs\Startup\system32.exe
Deletes the following files:
%TEMP%\aut15.tmp
%TEMP%\aut14.tmp
%TEMP%\aut17.tmp
%TEMP%\aut16.tmp
%TEMP%\aut11.tmp
%TEMP%\aut10.tmp
%TEMP%\aut13.tmp
%TEMP%\aut12.tmp
%TEMP%\aut1B.tmp
%TEMP%\aut1A.tmp
%TEMP%\aut1D.tmp
%TEMP%\aut1C.tmp
<Drive name for removable media>:\SriLanka.exe
%TEMP%\aut18.tmp
%TEMP%\aut19.tmp
<Drive name for removable media>:\autorun.inf
%TEMP%\aut6.tmp
%TEMP%\aut5.tmp
%WINDIR%\autorun.inf
%TEMP%\aut7.tmp
%TEMP%\aut2.tmp
%TEMP%\aut1.tmp
%TEMP%\aut4.tmp
%TEMP%\aut3.tmp
%TEMP%\autD.tmp
%TEMP%\autC.tmp
%TEMP%\autF.tmp
%TEMP%\autE.tmp
%TEMP%\aut9.tmp
%TEMP%\aut8.tmp
%TEMP%\autB.tmp
%TEMP%\autA.tmp
Miscellaneous:
Searches for the following windows:
ClassName: 'Shell_TrayWnd' WindowName: ''
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