Win32.HLLW.Autoruner.53031

Added to the Dr.Web virus database: 2011-06-22

Virus description added: 2011-07-02

To ensure autorun and distribution:

Modifies the following registry keys:

[<HKLM>\SOFTWARE\Microsoft\Windows\CurrentVersion\Run] 'MSWUpdate' = '"%APPDATA%\csrss.exe"'
[<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'MSWUpdate' = '"%APPDATA%\csrss.exe"'
[<HKLM>\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon] 'Shell' = 'Explorer.exe "%APPDATA%\csrss.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] '%APPDATA%\csrss.exe' = '%APPDATA%\csrss.exe:*:Enabled:CityScape'

Creates and executes the following:

Executes the following:

<SYSTEM32>\netsh.exe firewall add allowedprogram "%APPDATA%\csrss.exe" CityScape Enable

Modifies file system :

Creates the following files:

%APPDATA%\csrss.exe
%APPDATA%\hOLUVKyM
%HOMEPATH%\Local Settings\Temporary Internet Files\Content.IE5\69I9OPW5\locate_my_ip[1]

Sets the 'hidden' attribute to the following files:

Deletes the following files:

Network activity:

Connects to:

TCP:

HTTP GET requests:

UDP:

Miscellaneous:

Searches for the following windows: