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Win32.HLLW.Autohit.12752
Added to the Dr.Web virus database:
2011-06-24
Virus description added:
2011-06-25
Technical Information
To ensure autorun and distribution:
Modifies the following registry keys:
[<HKLM>\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon] 'Shell' = 'Explorer.exe %ALLUSERSPROFILE%\Start Menu\Programs\svchost\svchost.exe'
[<HKLM>\SOFTWARE\Microsoft\Windows\CurrentVersion\Run] '<Virus name>.exe' = '%ALLUSERSPROFILE%\Start Menu\Programs\svchost\svchost.exe'
[<HKLM>\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon] 'Shell' = 'Explorer.exe %HOMEPATH%\svchost\svchost.exe'
[<HKLM>\SOFTWARE\Microsoft\Windows\CurrentVersion\Run] '<Virus name>.exe' = '%HOMEPATH%\svchost\svchost.exe'
[<HKLM>\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon] 'Shell' = 'Explorer.exe %CommonProgramFiles%\svchost\svchost.exe'
[<HKLM>\SOFTWARE\Microsoft\Windows\CurrentVersion\Run] '<Virus name>.exe' = '%CommonProgramFiles%\svchost\svchost.exe'
[<HKLM>\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon] 'Shell' = 'Explorer.exe %ALLUSERSPROFILE%\Application Data\svchost\svchost.exe'
[<HKLM>\SOFTWARE\Microsoft\Windows\CurrentVersion\Run] '<Virus name>.exe' = '%ALLUSERSPROFILE%\Application Data\svchost\svchost.exe'
Malicious functions:
To complicate detection of its presence in the operating system,
blocks execution of the following system utilities:
Registry Editor (RegEdit)
Creates and executes the following:
%CommonProgramFiles%\svchost\svchost.exe
Executes the following:
<SYSTEM32>\net1.exe Stop SharedAccess
<SYSTEM32>\net1.exe stop "Security Center"
<SYSTEM32>\netsh.exe firewall set opmode mode=disable
<SYSTEM32>\net.exe Stop SharedAccess
<SYSTEM32>\net.exe stop "Security Center"
Modifies settings of Windows Internet Explorer:
[<HKCU>\Software\Microsoft\Windows\CurrentVersion\Policies\Attachments] 'SaveZoneInformation' = '00000001'
[<HKCU>\Software\Microsoft\Windows\CurrentVersion\Policies\Associations] 'LowRiskFileTypes' = '.exe;.bat;.com;.cmd;.reg;.vbs;.inf;.msi;.htm;.html;.js;'
[<HKCU>\Software\Microsoft\Internet Explorer\Download] 'CheckExeSignatures' = 'no'
[<HKCU>\Software\Microsoft\Internet Explorer\Download] 'RunInvalidSignatures' = '00000001'
Modifies file system :
Creates the following files:
%HOMEPATH%\svchost\svchost.exe
%ALLUSERSPROFILE%\Start Menu\Programs\svchost\svchost.exe
%TEMP%\eoinvdd
%TEMP%\aut2.tmp
%TEMP%\cwcbekx
%TEMP%\aut1.tmp
%ALLUSERSPROFILE%\Application Data\svchost\svchost.exe
%CommonProgramFiles%\svchost\svchost.exe
Sets the 'hidden' attribute to the following files:
%ALLUSERSPROFILE%\Start Menu\Programs\svchost\svchost.exe
%HOMEPATH%\svchost\svchost.exe
%CommonProgramFiles%\svchost\svchost.exe
%ALLUSERSPROFILE%\Application Data\svchost\svchost.exe
Deletes the following files:
%TEMP%\aut2.tmp
%TEMP%\eoinvdd
%TEMP%\aut1.tmp
%TEMP%\cwcbekx
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