ctrlpan.dll

Windows errors related to ctrlpan.dll
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File description
Troj/StartPg-BG
Aliases
Trojan.Win32.StartPage.bg

Type
Trojan

Detection
A virus identity (IDE) file which provides protection is available now from the Latest virus identities section, and is incorporated into the February 2004 (3.78) release of Sophos Anti-Virus.
At the time of writing, Sophos has received no reports from users affected by this Trojan. However, we have issued this advisory following enquiries to our support department from customers.


Description
Troj/StartPg-BG sets the home page of Internet Explorer to http://aifind.cc/ by modifying the following registry entries:
HKCU\Software\Microsoft\Internet Explorer\Main\Search Bar
HKCU\Software\Microsoft\Internet Explorer\SearchURL

Troj/StartPg-BG also creates a stylesheet that can be used to redirect the user to adult related sites by creating a stylesheet in the folder called HH.HTT and by setting the following registry entries:

HKCU\Software\Microsoft\Internet Explorer\Styles\
Use My Stylesheet\ = 1

HKCU\Software\Microsoft\Internet Explorer\Styles\
User Stylesheet\ =

The stylesheet is detected as Troj/StartPg-BG.

Troj/StartPg-BG also copies itself to the folder as CTRLPAN.DLL and creates the following registry entry to run on system restart:

HKLM\Software\Microsoft\Windows\CurrentVersion\Run\
Control\= rundll32.exe \SYSTEM\CTRLPAN.DLL,Restore ControlPanel


Recovery
Please follow the instructions for removing Trojans.

You should also change your Internet Explorer settings using Tools|Internet options|General to remove any modifications made by the Trojan.

Windows NT/2000/XP/2003

In Windows NT/2000/XP/2003 you will also need to edit the following registry entry. The removal of this entry is optional in Windows 95/98/Me. Please read the warning about editing the registry.

At the taskbar, click Start|Run. Type 'Regedit' and press Return. The registry editor opens.

Before you edit the registry, you should make a backup. On the 'Registry' menu, click 'Export Registry File'. In the 'Export range' panel, click 'All', then save your registry as Backup.

Locate the HKEY_LOCAL_MACHINE entry:

HKLM\Software\Microsoft\Windows\CurrentVersion\Run\
Control\= rundll32.exe \SYSTEM\CTRLPAN.DLL,Restore ControlPanel

and delete it if it exists.

Close the registry editor.

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