Win32.HLLW.Brutus.4653

Added to the Dr.Web virus database: 2012-09-13

Virus description added: 2012-10-04

To ensure autorun and distribution:

Modifies the following registry keys:

[<HKLM>\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon] 'Shell' = 'Explorer.exe'
[<HKLM>\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon] 'UIHost' = 'logonui.exe'

Malicious functions:

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

[<HKLM>\SYSTEM\ControlSet001\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile\AuthorizedApplications\List] '<Full path to virus>' = '<Full path to virus>:*:Enabled:sys'

Executes the following:

<SYSTEM32>\netsh.exe firewall add allowedprogram <Full path to virus> sys enable
<SYSTEM32>\wscript.exe -b %TEMP%\1.tmp
<SYSTEM32>\reg.exe delete "HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\Browser Helper Objects" /f
<SYSTEM32>\reg.exe delete "HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Run" /f
<SYSTEM32>\reg.exe delete "HKCU\SOFTWARE\Microsoft\Windows\CurrentVersion\Run" /f

Terminates or attempts to terminate

a large number of user processes.

Modifies file system :

Creates the following files:

Deletes the following files:

Miscellaneous:

Searches for the following windows: