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Remove Antivirus System Pro (Uninstall Guide)

By on June 5, 2009 @ 08:54 AM | Last Updated: November 29, 2009 | Read 664,346 times.
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Antivirus System Pro is a rogue anti-spyware that uses false scan results, fake security alerts, and Internet Explorer hijacking in order to have you purchase this program. It is because of these actions that we classify Antivirus System Pro as a rogue anti-spyware program. When installed, Antivirus System pro will be configured to start automatically when you log into Windows. Once running it will scan your computer and display numerous infections that do not actually exist. Furthermore, it will state it will not remove these infections unless you first purchase the program. This method of stating there are infections, but not removing it until you purchase it, is just another tactic to have you purchase the software.

 

Antivirus System Pro screen shot
Antivirus System Pro screen shot
For more screen shots of this infection click on the image above.
There are a total of 6 images you can view.

 

While running, you will also be constantly barraged with fake security alerts stating that your computer is under attack or that you have viruses on your computer. For example, one alert is labeled Infiltration Alert and it states that your computer is being attacked by an Internet Virus. Another alert prompts you to scan your computer and when you click on it, will automatically launch Antivirus System Pro and then prompt you to purchase it. The text of this alert is:

Windows Security alert
Windows reports that computer is infected. Antivirus software helps to protect your computer against viruses and other security threats. Click here for the scan you computer. Your system might be at risk now.

Last, but not least, Antivirus System Pro will install a Internet Explorer Browser Helper Object that will hijack Internet Explorer so that when you are browsing web sites, instead of going to the page you want, you will be shown a warning message. This warning message will state that the site you are going to is harmful to your computer and that you should purchase Antivirus System Pro to protect yourself.

As you can see, this program utilizes many tactics to make you think you are infected and thus tricking you into purchase the program. Please do not purchase this program as it will not protect your computer in any way. Instead, use the guide below to remove this infection and any related malware for free.

 

Threat Classification:

 

Advanced information:

View Antivirus System Pro files.
View Antivirus System Pro Registry Information.

 

Tools Needed for this fix:

 

Symptoms that may be in a HijackThis Log:

<b>The filenames may be random.</b>

O1 - Hosts: ::1 localhost
O1 - Hosts: 209.44.111.57 security.microsoft.com
O1 - Hosts: 209.44.111.57 inetavirus.com
O1 - Hosts: 209.44.111.57 www.inetavirus.com
O1 - Hosts: 91.212.127.227 osawarepro2009.microsoft.com
O1 - Hosts: 91.212.127.227 osawarepro2009.com
O1 - Hosts: 91.212.127.227 www.osawarepro2009.com
O2 - BHO: BHO - {BAD4551D-9B24-42cb-9BCD-818CA2DA7B63} - C:\WINDOWS\system32\iehelper.dll
O4 - HKCU\..\Run: [system tool] C:\WINDOWS\sysguard.exe
O4 - HKLM\..\Run: [<random characters>] C:\Documents and Settings\<UserProfile>\<random characters>\<4 random chars>sysguard.exe
O4 - HKCU\..\Run: [<random characters>] C:\Documents and Settings\<UserProfile>\<random characters>\<4 random chars>sysguard.exe

 

Guide Updates:

06/05/09 - Initial guide creation.
11/12/09 - Updated to use new removal technique due to new variant.
11/29/09 - Updated removal technique due to new protection system used by Antivirus System Pro

 


Automated Removal Instructions for Antivirus System Pro using Malwarebytes Anti-Malware:

 

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

  2. It is possible that the infection you are trying to remove will not allow you to download files on the infected computer. If you run into this problem when following the steps in this guide you will need to download the files requested in this guide on another computer and then transfer them to the infected computer. You can transfer the files via a CD/DVD, external drive, or USB flash drive.

  3. Reboot your computer into Safe Mode with Networking using the instructions for your version of Windows found in the following tutorial:
    How to start Windows in Safe Mode
    When following the steps in the above tutorial, select Safe Mode with Networking rather than just Safe Mode. When the computer reboots into Safe Mode with Networking make sure you login with the username you normally use. When you are at your Windows desktop, please continue with the rest of the steps.

  4. This infection changes your Windows settings to use a proxy server that will not allow you to browse any pages on the Internet with Internet Explorer or update security software. Regardless of the web browser you use, for these instructions we will first need need to fix this problem so that we can download the utilities we need to remove this infection.

    Please start Internet Explorer, and when the program is open, click on the Tools menu and then select Internet Options as shown in the image below.



    Internet Explorer Tools Menu


  5. You should now be in the Internet Options screen as shown in the image below.



    Internet Options screen



    Now click on the Connections tab as designated by the blue arrow above.

  6. You will now be at the Connections tab as shown by the image below.


    Internet Options connections tab



    Now click on the Lan Settings button as designated by the blue arrow above.

  7. You will now be at the Local Area Network (LAN) settings screen as shown by the image below.



    Proxy Settings screen



    Under the Proxy Server section, please uncheck the checkbox labeled Use a proxy server for your LAN. Then press the OK button to close this screen. Then press the OK button to close the Internet Options screen. Now that you have disabled the proxy server you will be able to browse the web again with Internet Explorer.

  8. Now we must end the processes that belong to Antivirus System Pro so that it does not interfere with the cleaning procedure. To do this, please download RKill to your desktop from the following link.

    RKill Download Link - (Download page will open in a new tab or browser window.)

    When at the download page, click on the Download Now button labeled iExplore.exe download link. When you are prompted where to save it, please save it on your desktop.

    If you are unable to connect to the site to download RKill, please go back and do steps 3-6 again and make sure the infection has not reenabled the proxy settings. You may have to do this quite a few times before you can get RKill downloaded. If you still cannot download the RKill program on the infected computer, you should download it to a clean computer and copy it to the infected one via a USB flash drive or CDROM.

  9. Once it is downloaded, double-click on the iExplore.exe icon in order to automatically attempt to stop any processes associated with Antivirus System Pro and other Rogue programs. Please be patient while the program looks for various malware programs and ends them. When it has finished, the black window will automatically close and you can continue with the next step. If you get a message that RKill is an infection, do not be concerned. This message is just a fake warning given by Antivirus System Pro when it terminates programs that may potentially remove it. If you run into these infections warnings that close RKill, a trick is to leave the warning on the screen and then run RKill again. By not closing the warning, this typically will allow you to bypass the malware trying to protect itself so that RKill can terminate Antivirus System Pro . So, please try running RKill until the malware is no longer running. You will then be able to proceed with the rest of the guide. Do not reboot your computer after running RKill as the malware programs will start again.

    If you continue having problems running RKill, you can download the other renamed versions of RKill from the RKill download page. Both of these files are renamed copies of RKill, which you can try instead. Please note that the download page will open in a new browser window or tab.


  10. Now you should download Malwarebytes Anti-Malware, or MBAM, from the following location and save it to your desktop:

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

    If you are unable to connect to the site to download Malwarebytes', please go back and do steps 3-6 again and make sure the infection has not reenabled the proxy settings.


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

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

  13. 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 both the Update Malwarebytes Anti-Malware and Launch Malwarebytes Anti-Malware checked. Then click on the Finish button. If MalwareBytes' prompts you to reboot, please do not do so.

  14. MBAM will now automatically start and you will see a message stating that you should update the program before performing a scan. As MBAM will automatically update itself after the install, you can press the OK button to close that box and you will now be at the main program as shown below.


    MalwareBytes Anti-Malware Screen

  15. On the Scanner tab, make sure the the Perform full scan option is selected and then click on the Scan button to start scanning your computer for Antivirus System Pro related files.

  16. MBAM will now start scanning your computer for malware. This process can take quite a while, so we suggest you go and do something else and periodically check on the status of the scan. When MBAM is scanning it will look like the image below.


    MalwareBytes Anti-Malware Scanning Screen

  17. When the scan is finished a message box will appear as shown in the image below.


    MalwareBytes Anti-Malware Scan Finished Screen

    You should click on the OK button to close the message box and continue with the Antivirus System Pro removal process.

  18. You will now be back at the main Scanner screen. At this point you should click on the Show Results button.

  19. A screen displaying all the malware that the program found will be shown as seen in the image below. Please note that the infections found may be different than what is shown in the image.


    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.

  20. When MBAM has finished removing the malware, it will open the scan log and display it in Notepad. Review the log as desired, and then close the Notepad window.

  21. You can now exit the MBAM program.

  22. As many rogues and other malware are installed through vulnerabilities found in out-dated and insecure programs, it is strongly suggested that you use Secunia PSI to scan for vulnerable programs on your computer. A tutorial on how to use Secunia PSI to scan for vulnerable programs can be found here:

    How to detect vulnerable and out-dated programs using Secunia Personal Software Inspector

 

Your computer should now be free of the Antivirus System Pro program. You may want to consider purchasing the PRO version of Malwarebytes Anti-Malware to protect against these types of threats in the future, as if you had the real-time protection component, that comes with the paid for version, activated it would not have allowed this infection to install.

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

 


 

Associated Antivirus System Pro Files:

c:\WINDOWS\sysguard.exe
c:\WINDOWS\system32\iehelper.dll
C:\Documents and Settings\<UserProfile>\<random characters>\<4 random chars>sysguard.exe

 

Associated Antivirus System Pro Windows Registry Information:

HKEY_CURRENT_USER\Software\AvScan
HKEY_CLASSES_ROOT\CLSID\{BAD4551D-9B24-42cb-9BCD-818CA2DA7B63}
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\Browser Helper Objects\{BAD4551D-9B24-42cb-9BCD-818CA2DA7B63}
HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Run "system tool"
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run "<random characters>"

 


 

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.


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