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Win32.HLLW.Autoruner.54572
Added to the Dr.Web virus database:
2011-07-19
Virus description added:
2011-07-19
Technical Information
To ensure autorun and distribution:
Modifies the following registry keys:
[<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'Explorer' = '%WINDIR%\Regedot.exe'
[<HKLM>\SOFTWARE\Microsoft\Windows\CurrentVersion\Run] 'Firewall' = '%WINDIR%\Regedot.exe'
Creates the following files on removable media:
<Drive name for removable media>:\setup.exe
<Drive name for removable media>:\autorun.inf
<Drive name for removable media>:\Mis Imagenes.exe
<Drive name for removable media>:\Nueva Carpeta (2).exe
Malicious functions:
To bypass firewall, removes or modifies the following registry keys:
[<HKLM>\SYSTEM\ControlSet001\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile\AuthorizedApplications\List] '%WINDIR%\Regedot.exe' = '%WINDIR%\Regedot.exe:*:Enabled:Messenger'
Creates and executes the following:
%WINDIR%\downloaded2.exe (downloaded from the Internet)
%WINDIR%\downloaded1.exe (downloaded from the Internet)
%WINDIR%\Regedot.exe
Executes the following:
<SYSTEM32>\netsh.exe firewall add allowedprogram "%WINDIR%\Regedot.exe" Messenger ENABLE ALL
%WINDIR%\explorer.exe
Modifies file system :
Creates the following files:
C:\Nueva Carpeta (2).exe
C:\Mis Imagenes.exe
C:\autorun.inf
C:\setup.exe
%WINDIR%\downloaded2.exe
%WINDIR%\Regedot.exe
%TEMP%\downmelt.exe
%WINDIR%\downloaded1.exe
%HOMEPATH%\Local Settings\Temporary Internet Files\Content.IE5\69I9OPW5\regedit32a[1].exe
Sets the 'hidden' attribute to the following files:
<Drive name for removable media>:\setup.exe
<Drive name for removable media>:\autorun.inf
C:\setup.exe
C:\autorun.inf
Deletes itself.
Network activity:
Connects to:
'www.fr###ebtown.com':80
'localhost':1036
TCP:
HTTP GET requests:
www.fr###ebtown.com/shockwavdownload/regedit32a.exe
UDP:
DNS ASK www.fr###ebtown.com
Miscellaneous:
Searches for the following windows:
ClassName: 'Indicator' WindowName: ''
ClassName: '' WindowName: ''
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