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Win32.HLLW.Autoruner.52278
Added to the Dr.Web virus database:
2011-06-23
Virus description added:
2011-06-23
Technical Information
To ensure autorun and distribution:
Modifies the following registry keys:
[<HKLM>\SOFTWARE\Microsoft\Windows\CurrentVersion\Run] 'LSAgent' = '%WINDIR%\lsass.exe'
[<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'Win32' = '%WINDIR%\system.exe'
[<HKLM>\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon] 'Shell' = 'Explorer.exe "%ALLUSERSPROFILE%\application data\Microsoft\KBDriver\kbsys.exe"'
[<HKLM>\SOFTWARE\Microsoft\Windows\CurrentVersion\Run] 'DirLock' = '%ALLUSERSPROFILE%\application data\Lambda\DirLock.exe'
Creates or modifies the following files:
%ALLUSERSPROFILE%\Start Menu\Programs\Startup\Classified.exe
Creates the following services:
[<HKLM>\SYSTEM\ControlSet001\Services\sr] 'Start' = '00000000'
[<HKLM>\SYSTEM\ControlSet001\Services\srservice] 'Start' = '00000002'
Creates the following files on removable media:
<Drive name for removable media>:\autorun.inf
<Drive name for removable media>:\Read1st.exe
<Drive name for removable media>:\Classified.exe
Malicious functions:
To complicate detection of its presence in the operating system,
forces the system hide from view:
hidden files
file extensions
blocks the following features:
Creates and executes the following:
%WINDIR%\lsass.exe
<SYSTEM32>\winnthlp2.exe
%ALLUSERSPROFILE%\Application Data\Lambda\DirLock.exe
<SYSTEM32>\winnthlp1.exe
Executes the following:
%WINDIR%\explorer.exe <Current directory>\<Virus name>
Terminates or attempts to terminate
the following system processes:
<SYSTEM32>\cscript.exe
System
the following user processes:
AVGCTRL.EXE
ClamWin.exe
fsavgui.exe
ashAvast.exe
avgcc.exe
AVGCC32.EXE
Modifies settings of Windows Explorer:
[<HKCU>\Software\Microsoft\Windows\CurrentVersion\Policies\Explorer] 'NoFolderOptions' = '00000001'
Miscellaneous:
Searches for the following windows:
ClassName: 'Indicator' WindowName: ''
ClassName: '' WindowName: ''
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