Remove Pest Detector 4.1 (Uninstall Guide)

Posted by Lawrence Abrams on August 24, 2010 @ 11:04 AM · Views: 19,120

 

What this infection does:

Pest Detector 4.1 is a rogue anti-virus program that is distributed by the Fake Microsoft Security Essentials Alert Trojan. When the fake alert states that you are infected it will prompt you to download one of 5 rogue anti-spyware programs, with Pest Detector 4.1 being one of them. Once Pest Detector 4.1 is installed it will be configured to start automatically when you start Windows. It will start before the Windows Desktop appears and alert you that your computer is infected and that certain files cannot be repaired unless you use the program's heuristic mode, which is only available if you purchase the program. In reality, though, none of the files it states are infections are actually infected. Therefore, do not purchase this program no matter what it displays.

 

Pest Detector 4.1 screen shot
For more screen shots of this infection click on the image above.
There are a total of 1 images you can view.

 

When Pest Detector 4.1 is running it will also terminate computer programs when you attempt to run them. When you attempt to run these programs it will close them and display a message stating that they are infected. The text of this message is:

The application iexplore.exe was launched successfully but it was forced to shut down due to security reasons.
This happened because the application was infected by a malicious program which might pose a threat for the OS.
It is highly recommended to install the necessary heuristic module and perform a full scan of your computer to exterminate malicious programs from it.

This infection alert is fake and is only being shown to scare you into purchasing the software.

Without a doubt, Pest Detector 4.1 was created to trick you into thinking that you are infected. Therefore do not purchase this program, and if you have, please contact your credit card company to dispute the charges. To remove the fake Pest Detector 4.1 please use the removal guide below.

 

Threat Classification:

• Information on Rogue Programs & Scareware

 

Advanced information:

View Pest Detector 4.1 files.
View Pest Detector 4.1 Registry Information.

 

Tools Needed for this fix:

• Malwarebytes' Anti-Malware

 

Guide Updates:

08/24/10 - Initial guide creation.

 

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Automated Removal Instructions for Pest Detector 4.1 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 this is the case, then 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. Before we can do anything we must first end the processes that belong to Pest Detector 4.1 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.
   
   
4. Once it is downloaded, double-click on the iExplore.exe icon in order to automatically attempt to stop any processes associated with Pest Detector 4.1 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 Pest Detector 4.1 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 Pest Detector 4.1 . 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. If you continue having problems running RKill, you can download the other renamed versions of RKill from the rkill download page. All of the 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.
   
   Do not reboot your computer after running RKill as the malware programs will start again.
   
   
5. 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)
   
   


6. Once downloaded, close all programs and Windows on your computer, including this one.
   
   
7. Double-click on the icon on your desktop named mbam-setup.exe. This will start the installation of MBAM onto your computer.
   
   
8. 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.
   
   
9. 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.
   
   
   
   
   
   
   
10. 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 Pest Detector 4.1 related files.
    
    
11. 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.
    
    
    
    
    
    
    
12. 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 Pest Detector 4.1 removal process.
    
    
13. You will now be back at the main Scanner screen. At this point you should click on the Show Results button.
    
    
14. 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.
    
    
15. 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.
    
    
16. You can now exit the MBAM program.
    
    
17. 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 Pest Detector 4.1 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

 

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Associated Pest Detector 4.1 Files:

%UserProfile%\Application Data\PAV\
%UserProfile%\Application Data\antispy.exe

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, and c:\winnt\profiles\<Current User> for Windows NT.

 

Associated Pest Detector 4.1 Windows Registry Information:

HKEY_CURRENT_USER\Software\PAV
HKEY_CURRENT_USER\Software\Microsoft\Windows NT\CurrentVersion\Winlogon "Shell" = "%UserProfile%\Application Data\antispy.exe"