Welcome Guest (Log In | Create Account)
New Member? Join for free.

Learn how to remove Malware Defender 2009 (Removal Guide)

By on March 22, 2009 @ 03:05 PM | Read 61,074 times.
  • Print this page

Malware Defender 2009 is a program from the same family as System Guard 2009 and Spyware Guard 2009. This rogue is promoted by the Trojan Vundo infection, which displays fake security alerts and pop-ups that state your computer is infected. These pop-ups will then state that you should run an online anti-malware scanner in order to scan your computer for malware. Once you click on this pop-up, you will be brought to a page that displays an advertisement pretending to be an online anti-malware scanner. Once the advertisement is finished, it will state your computer has a variety of malware and then prompt you to download and install Malware Defender 2009 in order to protect your computer. While infected with the Vundo infection, you will constantly be barraged by these types of popups.


Malware Defender 2009 screen shot
Malware Defender 2009 screen shot
For more screen shots of this infection click on the image above.
There are a total of 6 images you can view.


When Malware Defender is installed it will be configured to automatically load when you start your computer. Once started, it will scan your computer and list a variety of malware infections that will not be removed until you purchase the software. These infections, though, are all nonexistent and only being shown to make you think you are infected so that you purchase their software. Bundled with Malware Defender is another Trojan called C:\Windows\System32\wcenter.exe, which will display a fake Windows Security Center window on your desktop. This fake security center is a clone of the legitimate Windows Security Center, except that it tries to promote the Malware Defender 2009 program instead of legitimate programs. Last but not least, due to this program always running in the background, displaying fake alerts, and showing the fake Windows Security Center, your computer may start to become slower than it should be. In order to properly remove this malware, and the Vundo infection, please use the removal guide below to uninstall this program.


Threat Classification:


Advanced information:

View Malware Defender 2009 files.
View Malware Defender 2009 Registry Information.


Entries for this program found in the Uninstall Programs control panel:

Malware Defender 2009


Tools Needed for this fix:


Symptoms that may be in a HijackThis Log:

O4 - HKLM\..\Run: [malwaredef] C:\Program Files\Malware Defender 2009\malwaredef.exe
O4 - HKCU\..\Run: [updater] C:\Documents and Settings\All Users\Application Data\Microsoft\Network\install.exe /u
O21 - SSODL: HardwareDrivers - {8B2C743A-D44A-4A93-8233-ABEE8BF8ED62} - C:\Documents and Settings\All Users\Application Data\Microsoft\Media Index\Drivers\hdddriver.dll
O21 - SSODL: DriversLoad - {3F0691F1-70E6-44A9-938A-1DC356674878} - C:\Documents and Settings\All Users\Application Data\Microsoft\Media Index\Drivers\vifwnhzqoe.dll


Article Updates:

03-15-09 - Initial guide creation.


Automated Removal Instructions for Malware Defender 2009 using Malwarebytes Anti-Malware:

  1. Print out these instructions as we will need to close every window that is open later in the fix.

  2. At this point you should download Malwarebytes Anti-Malware, or MBAM, to scan your computer for any any infections or adware that may be present. Please download Malwarebytes from the following location and save it to your desktop:

    Malwarebytes Anti-Malware Download Link (Download page will open in a new window)

  3. Once downloaded, close all programs and Windows on your computer, including this one.

  4. Double-click on the icon on your desktop named mbam-setup.exe. This will start the installation of MBAM onto your computer.

  5. When the installation begins, keep following the prompts in order to continue with the installation process. Do not make any changes to default settings and when the program has finished installing, make sure you leave Launch Malwarebytes Anti-Malware checked. Then click on the Finish button. If MalwareBytes prompts you to reboot, please do not do so.

  6. MBAM will now start and you will be at the main screen as shown below.

    Malwarebytes Anti-Malware

    Please click on the Scan Now button to start the scan. If there is an update available for Malwarebytes it will automatically download and install it before performing the scan.

  7. MBAM will now start scanning your computer for malware. This process can take quite a while, so we suggest you do something else and periodically check on the status of the scan to see when it is finished.

    Malwarebytes Anti-Malware

  8. When MBAM is finished scanning it will display a screen that displays any malware that it has detected. Please note that the infections found may be different than what is shown in the image below due to the guide being updated for newer versions of MBAM.

    MalwareBytes Scan Results

    You should now click on the Remove Selected button to remove all the listed malware. MBAM will now delete all of the files and registry keys and add them to the programs quarantine. When removing the files, MBAM may require a reboot in order to remove some of them. If it displays a message stating that it needs to reboot, please allow it to do so. Once your computer has rebooted, and you are logged in, please continue with the rest of the steps.

  9. You can now exit the MBAM program.

Your computer should now be free of the MalwareDefender 2009 program. If your current anti-virus solution let this infection through, you may want to consider purchasing the PRO version of Malwarebytes Anti-Malware to protect against these types of threats in the future.

If you are still having problems with your computer after completing these instructions, then please follow the steps outlined in the topic linked below:

Preparation Guide For Use Before Using Malware Removal Tools and Requesting Help


View Associated Malware Defender 2009 Files

c:\Program Files\Malware Defender 2009
c:\Program Files\Malware Defender 2009\conf.cfg
c:\Program Files\Malware Defender 2009\malwaredef.exe
c:\Program Files\Malware Defender 2009\mbase.vdb
c:\Program Files\Malware Defender 2009\quarantine.vdb
c:\Program Files\Malware Defender 2009\queue.vdb
c:\Program Files\Malware Defender 2009\uninstall.exe
c:\Program Files\Malware Defender 2009\vbase.vdb
c:\Program Files\Malware Defender 2009\quarantine
c:\Documents and Settings\All Users\Application Data\Microsoft\Media Index\Drivers
c:\Documents and Settings\All Users\Application Data\Microsoft\win.exe
c:\Documents and Settings\All Users\Application Data\Microsoft\Media Index\svchos.exe
c:\Documents and Settings\All Users\Application Data\Microsoft\Media Index\t.id
c:\Documents and Settings\All Users\Application Data\Microsoft\Media Index\Drivers\c.cgm
c:\Documents and Settings\All Users\Application Data\Microsoft\Media Index\Drivers\hdddriver.dll
c:\Documents and Settings\All Users\Application Data\Microsoft\Media Index\Drivers\vifwnhzqoe.dll
c:\Documents and Settings\All Users\Application Data\Microsoft\Network\install.exe
%UserProfile%\Desktop\Malware Defender 2009.lnk
%UserProfile%\Start Menu\Programs\Malware Defender 2009
%UserProfile%\Start Menu\Programs\Malware Defender 2009\Malware Defender 2009.lnk
%UserProfile%\Start Menu\Programs\Malware Defender 2009\Uninstall.lnk

File Location Notes:

%UserProfile% refers to the current user's profile folder. By default, this is C:\Documents and Settings\<Current User> for Windows 2000/XP, C:\Users\<Current User> for Windows Vista/7/8, and c:\winnt\profiles\<Current User> for Windows NT.

View Associated Malware Defender 2009 Windows Registry Information

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\Malware Defender 2009
HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Run "updater"
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run "malwaredef"
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\ShellServiceObjectDelayLoad "DriversLoad"
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\ShellServiceObjectDelayLoad "HardwareDrivers"


This is a self-help guide. Use at your own risk.

BleepingComputer.com can not be held responsible for problems that may occur by using this information. If you would like help with any of these fixes, you can ask for malware removal assistance in our Virus, Trojan, Spyware, and Malware Removal Logs forum.

If you have any questions about this self-help guide then please post those questions in our Am I infected? What do I do? and someone will help you.

Advertise   |   About Us   |   User Agreement   |   Privacy Policy   |   Sitemap   |   Chat   |   RSS Feeds   |   Contact Us
Tech Support Forums   |   Virus Removal Guides   |   Downloads   |   Tutorials   |   The Computer Glossary   |   Uninstall List   |   Startups   |   The File Database

© 2003-2015 All Rights Reserved Bleeping Computer LLC.
Site Changelog