Win32.HLLW.Autoruner1.24938

Added to the Dr.Web virus database: 2012-08-15

Virus description added: 2012-09-05

To ensure autorun and distribution:

Modifies the following registry keys:

[<HKCU>\Software\Microsoft\Windows\CurrentVersion\Policies\Explorer\Run] 'winlogon' = '%WINDIR%\winlogon.exe'
[<HKLM>\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon] 'Userinit' = '<SYSTEM32>\userinit.exe,%WINDIR%\winlogon.exe'
[<HKLM>\SOFTWARE\Microsoft\Windows\CurrentVersion\policies\Explorer\Run] 'winlogon' = '%WINDIR%\winlogon.exe'
[<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'winlogon' = '%WINDIR%\winlogon.exe'
[<HKLM>\SOFTWARE\Microsoft\Windows\CurrentVersion\Run] 'winlogon' = '%WINDIR%\winlogon.exe'

Creates the following files on removable media:

Malicious functions:

To bypass firewall, removes or modifies the following registry keys:

[<HKLM>\SYSTEM\ControlSet001\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile\AuthorizedApplications\List] '%WINDIR%\winlogon.exe' = '%WINDIR%\winlogon.exe:*:Enabled:winlogon'

Creates and executes the following:

Executes the following:

<SYSTEM32>\netsh.exe firewall add allowedprogram "%WINDIR%\winlogon.exe" winlogon Enable

Modifies file system :

Creates the following files:

Sets the 'hidden' attribute to the following files:

Deletes itself.

Network activity:

Connects to:

UDP:

Miscellaneous:

Searches for the following windows: