Win32.HLLW.Autoruner1.11718

Added to the Dr.Web virus database: 2012-02-09

Virus description added: 2012-03-01

To ensure autorun and distribution:

Modifies the following registry keys:

[<HKLM>\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon] 'Userinit' = '<SYSTEM32>\userinit.exe,%WINDIR%\csrss.exe'
[<HKLM>\SOFTWARE\Microsoft\Windows\CurrentVersion\Run] 'csrss' = '%WINDIR%\csrss.exe'
[<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'csrss' = '%WINDIR%\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] '%WINDIR%\csrss.exe' = '%WINDIR%\csrss.exe:*:Enabled:csrss'

Creates and executes the following:

Executes the following:

<SYSTEM32>\dumprep.exe 2824 -dm 7 7 %TEMP%\WERef58.dir00\csrss.exe.hdmp 16325836412027380
<SYSTEM32>\dumprep.exe 2824 -dm 7 7 %TEMP%\WERef58.dir00\csrss.exe.mdmp 16325836412027368
<SYSTEM32>\netsh.exe firewall add allowedprogram "%WINDIR%\csrss.exe" csrss Enable

Modifies file system :

Creates the following files:

Sets the 'hidden' attribute to the following files:

Deletes the following files:

Deletes itself.

Network activity:

UDP:

Miscellaneous:

Searches for the following windows: