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Win32.HLLW.Autoruner1.13136
Added to the Dr.Web virus database:
2012-03-03
Virus description added:
2012-03-24
Technical Information
To ensure autorun and distribution:
Modifies the following registry keys:
[<HKLM>\SOFTWARE\Microsoft\Windows\CurrentVersion\Run] 'UserFaultCheck' = ''
[<HKLM>\SOFTWARE\Classes\exefile\shell\open\command] '' = '<SYSTEM32>\IMSIT.EXE Letov %1 %*'
Creates the following services:
[<HKLM>\SYSTEM\ControlSet001\Services\NetCtrl] 'Start' = '00000002'
Substitutes the following executable system files:
<SYSTEM32>\dllcache\oemig50.exe with <SYSTEM32>\dllcache\oemig50.exe.new
<SYSTEM32>\dllcache\shvlzm.exe with <SYSTEM32>\dllcache\shvlzm.exe.new
Malicious functions:
To complicate detection of its presence in the operating system,
blocks execution of the following system utilities:
Windows Task Manager (Taskmgr)
Registry Editor (RegEdit)
Creates and executes the following:
Modifies settings of Windows Explorer:
[<HKCU>\Software\Microsoft\Windows\CurrentVersion\Policies\Explorer] 'NoControlPanel' = '00000001'
[<HKCU>\Software\Microsoft\Windows\CurrentVersion\Policies\Explorer] 'NoDesktop' = '00000001'
[<HKCU>\Software\Microsoft\Windows\CurrentVersion\Policies\Explorer] 'NoTrayContextMenu' = '00000001'
[<HKCU>\Software\Microsoft\Windows\CurrentVersion\Policies\Explorer] 'NoFileMenu' = '00000001'
Modifies file system :
Creates the following files:
%PROGRAM_FILES%\Outlook Express\oemig50.exe.new
%PROGRAM_FILES%\MSN Gaming Zone\Windows\shvlzm.exe.new
<SYSTEM32>\dllcache\oemig50.exe.new
<SYSTEM32>\dllcache\shvlzm.exe.new
<SYSTEM32>\IMSIT.EXE
<DRIVERS>\smss.exe
%WINDIR%\pchealth\ERRORREP\UserDumps\smss.exe.20111114-203731-00.hdmp
%WINDIR%\pchealth\ERRORREP\UserDumps\smss.exe.20111114-203731-00.mdmp
Sets the 'hidden' attribute to the following files:
<SYSTEM32>\IMSIT.EXE
<DRIVERS>\smss.exe
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