Remove Contraviro (Uninstall Guide)

Posted by Grinler on June 20, 2009 @ 10:47 AM · Views: 14,920

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What this programs does:

Contraviro is a rogue anti-spyware program from the same family as Unvirex. Contraviro uses aggressive and false certifications in order to promote their product as well as exaggerated and false scan results to convince you that your computer has a security risk. When installed, Contraviro will be configured to start automatically when you log into Windows. Once running, it will scan your computer and list hundreds of supposed security risks on your computer. These risks, though, are legitimate Microsoft programs and should not be deleted as it would cause Windows to not operate properly. If you attempt to remove these supposed infections with Contraviro it will then prompt you to purchase the program.

Contraviro screen shot
For more screen shots of this infection click on the image above.
There are a total of 4 images you can view.

Contraviro will also install a special networking DLL called a a Layered Service Provider, or LSP, on to your computer. These types of programs are used to monitor network traffic that flows through your computer in order to detect certain information and then act upon it. For example, an anti-malware program may use an LSP to listen for known sites that would infect your computer and then block access to it when it detects you are trying to connect to it. The problem with an LSP, though, is that if you delete the file improperly it will cause your computer to no longer have any network connectivity. Therefore when removing Contraviro it is important that you remove it properly, such as using this guide, rather than just manually deleting the associated files. With this said, if you are infected with the Contraviro rogue anti-spyware program then please use the removal guide below to remove it for free.

Threat Classification:

• Information on Rogue Programs & Scareware

Advanced information:

View Contraviro files.
View Contraviro Registry Information.

Entries for this program found in the Add or Remove Programs control panel:

Contraviro

Tools Needed for this fix:

• Malwarebytes' Anti-Malware

Symptoms that may be in a HijackThis Log:

O2 - BHO: StatusBarPane - {CCB5551D-8594-4999-85F9-1E3EABCB95AC} - C:\Program Files\Contraviro\IEAddon.dll
O4 - HKLM\..\Run: [Contraviro] C:\Program Files\Contraviro\Contraviro.exe
O10 - Unknown file in Winsock LSP: c:\program files\contraviro\siglsp.dll
O10 - Unknown file in Winsock LSP: c:\program files\contraviro\siglsp.dll

Guide Updates:

06/20/09 - Initial guide creation.

Automated Removal Instructions for Contraviro 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. Download Malwarebytes' Anti-Malware, or MBAM, from the following location and save it to your desktop:
   
   Malwarebytes' Anti-Malware Download Link
   
   


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 both the Update Malwarebytes' Anti-Malware and Launch Malwarebytes' Anti-Malware checked. Then click on the Finish button.
   
   
6. 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.
   
   
   
   
   
   
   
7. 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 Contraviro related files.
   
   
8. 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.
   
   
   
   
   
   
   
9. When the scan is finished a message box will appear as shown in the image below.
   
   
   
   
   
   
   You should click on the OK button to close the message box and continue with the Contraviro removal process.
   
   
10. You will now be back at the main Scanner screen. At this point you should click on the Show Results button.
    
    
11. 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.
    
    
    
    
    
    
    
    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.
    
    
12. 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.
    
    
13. You can now exit the MBAM program.
    

Your computer should now be free of the Contraviro 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

Associated Contraviro Files:

c:\Program Files\Contraviro
c:\Program Files\Contraviro\Contraviro.exe
c:\Program Files\Contraviro\daily.cvd
c:\Program Files\Contraviro\Drvfltip.sys
c:\Program Files\Contraviro\hjengine.dll
c:\Program Files\Contraviro\IEAddon.dll
c:\Program Files\Contraviro\main.cvd
c:\Program Files\Contraviro\MFC71.dll
c:\Program Files\Contraviro\MFC71ENU.DLL
c:\Program Files\Contraviro\msvcp71.dll
c:\Program Files\Contraviro\msvcr71.dll
c:\Program Files\Contraviro\pthreadVC2.dll
c:\Program Files\Contraviro\shellext.dll
c:\Program Files\Contraviro\siglsp.dll
c:\Program Files\Contraviro\uninstall.exe
c:\Documents and Settings\All Users\Start Menu\Programs\Contraviro
c:\Documents and Settings\All Users\Desktop\Contraviro.lnk
c:\Documents and Settings\All Users\Start Menu\Programs\Contraviro.lnk
c:\Documents and Settings\All Users\Start Menu\Programs\Contraviro\Contraviro.lnk
c:\Documents and Settings\All Users\Start Menu\Programs\Contraviro\How to Register Contraviro.lnk
c:\Documents and Settings\All Users\Start Menu\Programs\Contraviro\Register Contraviro.lnk
%UserProfile%\Application Data\Microsoft\Internet Explorer\Quick Launch\Contraviro.lnk

Associated Contraviro Windows Registry Information:

HKEY_CLASSES_ROOT\*\shellex\ContextMenuHandlers\antivirus_contextscan
HKEY_CLASSES_ROOT\AppID\{C0E56AC2-9F72-436E-B6E7-AEC28AF9E4EB}
HKEY_CLASSES_ROOT\AppID\IEAddon.DLL
HKEY_CLASSES_ROOT\CLSID\{08EEC6AD-7486-487F-89B7-5A3716DDAE14}
HKEY_CLASSES_ROOT\CLSID\{CCB5551D-8594-4999-85F9-1E3EABCB95AC}
HKEY_CLASSES_ROOT\Drive\shellex\ContextMenuHandlers\antivirus_contextscan
HKEY_CLASSES_ROOT\Drives\shellex\ContextMenuHandlers\antivirus_contextscan
HKEY_CLASSES_ROOT\Folder\shellex\ContextMenuHandlers\antivirus_contextscan
HKEY_CLASSES_ROOT\Interface\{5B184B9D-B7BD-4FEA-8D1F-5E27182206A5}
HKEY_CLASSES_ROOT\TypeLib\{3ED0E410-5C8E-47B6-A75D-D10B886E903C}
HKEY_LOCAL_MACHINE\SOFTWARE\Contraviro
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\Browser Helper Objects\{CCB5551D-8594-4999-85F9-1E3EABCB95AC}
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\Contraviro
HKEY_CURRENT_USER\Software\Microsoft\Windows NT\CurrentVersion\Winlogon "Shell"
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\User Agent\Post Platform "Contraviro"
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run "Contraviro"