How To Remove Deftesrg.exe XMRig CPU Miner (Virus Removal Guide)

The Deftesrg.exe process is part of a Trojan Horse that uses the infected computer’s resources to mine the Monero digital currency without user permission.

The Deftesrg.exe XMRig CPU Miner is commonly bundled with other free programs that you download off of the Internet. Unfortunately, some free downloads do not adequately disclose that other software will also be installed and you may find that you have installed Deftesrg.exe XMRig CPU Miner without your knowledge.

Once this malicious program is installed, the Deftesrg.exe Miner will use more than 70% of your CPU’s power and graphics cards power. What this means, is that when the miners are running you will find that your computer is running slower and games are stuttering or freezing because the Deftesrg.exe Miner is using your computer’s resources to generate revenue for themselves. This will cause your CPU to run at very hot temperatures for extended periods of time, which could shorten the life of the CPU.

When infected with the Deftesrg.exe XMRig CPU Miner Trojan, other common symptoms include:

- Very high CPU and graphics cards usage
- Windows minimize and maximize slowly, and programs run slower.
- Programs don’t launch as quickly.
- General slowness when using the PC.
- Deftesrg.exe will connect to stratum+tcp://xmr-eu1.nanopool.org:14444 pools to mine the digital currency

You should always pay attention when installing software because often, a software installer includes optional installs. Be very careful what you agree to install.
Always opt for the custom installation and deselect anything that is not familiar, especially optional software that you never wanted to download and install in the first place. It goes without saying that you should not install software that you don’t trust.

The below instructions are for Windows users, however we also have an Android guide and a Mac OS guide which should help clean up your device.

How to remove Deftesrg.exe XMRig CPU Miner (Virus Removal Guide)

This malware removal guide may appear overwhelming due to the amount of the steps and numerous programs that are being used. We have only written it this way to provide clear, detailed, and easy to understand instructions that anyone can use to remove malware for free.
Please perform all the steps in the correct order. If you have any questions or doubt at any point, STOP and ask for our assistance.

To remove Deftesrg.exe XMRig CPU Miner Trojan, follow these steps:

STEP 1: Use Malwarebytes to remove Deftesrg.exe CPU Miner Trojan
STEP 2: Use HitmanPro to Scan for Malware and Unwanted Programs
STEP 3: Double-check for malicious programs with Zemana AntiMalware Free
STEP 4: Reset your browser to default settings

STEP 1: Use Malwarebytes to remove Deftesrg.exe CPU Miner Trojan

Malwarebytes is a powerful on-demand scanner which should remove the Deftesrg.exe XMRig CPU Miner from Windows. It is important to note that Malwarebytes will run alongside antivirus software without conflicts.

You can download download Malwarebytes from the below link.
MALWAREBYTES DOWNLOAD LINK (This link open a new page from where you can download “Malwarebytes”)
When Malwarebytes has finished downloading, double-click on the “mb3-setup-consumer” file to install Malwarebytes on your computer.

You may be presented with an User Account Control pop-up asking if you want to allow Malwarebytes to make changes to your device. If this happens, you should click “Yes” to continue with the installation.
When the Malwarebytes installation begins, you will see the Malwarebytes Setup Wizard which will guide you through the installation process.

To install Malwarebytes on your machine, keep following the prompts by clicking the “Next” button.
Once installed, Malwarebytes will automatically start and update the antivirus database. To start a system scan you can click on the “Scan Now” button.
Malwarebytes will now start scanning your computer for malicious programs.
This process can take a few minutes, so we suggest you do something else and periodically check on the status of the scan to see when it is finished.
When the scan has completed, you will be presented with a screen showing the malware infections that Malwarebytes has detected.
To remove the malicious programs that Malwarebytes has found, click on the “Quarantine Selected” button.
Malwarebytes will now quarantine all the malicious files and registry keys that it has found.
To complete the malware removal process, Malwarebytes may ask you to restart your computer.

When the malware removal process is complete, you can close Malwarebytes and continue with the rest of the instructions.

STEP 2: Use HitmanPro to Scan for Malware and Unwanted Programs

HitmanPro can find and remove malware, adware, bots, and other threats that even the best antivirus suite can oftentimes miss. HitmanPro is designed to run alongside your antivirus suite, firewall, and other security tools.

You can download HitmanPro from the below link:
HITMANPRO DOWNLOAD LINK (This link will open a new web page from where you can download “HitmanPro”)
When HitmanPro has finished downloading, double-click on the “hitmanpro” file to install this program on your computer.

You may be presented with an User Account Control pop-up asking if you want to allow HitmanPro to make changes to your device. If this happens, you should click “Yes” to continue with the installation.
When the program starts you will be presented with the start screen as shown below. Now click on the Next button to continue with the scan process.
HitmanPro will now begin to scan your computer for malware.
When it has finished it will display a list of all the malware that the program found as shown in the image below. Click on the “Next” button, to remove malware.
Click on the “Activate free license” button to begin the free 30 days trial, and remove all the malicious files from your computer.

When the process is complete, you can close HitmanPro and continue with the rest of the instructions.

STEP 3: Double-check for malicious programs with Zemana AntiMalware Free

Zemana AntiMalware is a free malware scanner which can detect malicious programs that your antivirus has failed to find.

You can download Zemana AntiMalware Free from the below link:
ZEMANA ANTIMALWARE FREE DOWNLOAD LINK (This link open a new webpage from where you can download “Zemana AntiMalware Free”)
Double-click on the file named “Zemana.AntiMalware.Setup.exe” to start the installation of Zemana AntiMalware.

You may be presented with a User Account Control dialog asking you if you want to run this file. If this happens, you should click “Yes” to continue with the installation.
Click on the “Next” button, to install Zemana AntiMalware on your computer.

When you reach the “Select Additional Tasks” screen, you can opt-out the “Enable Real Time Protection” option, then click on the “Next” button.
When Zemana AntiMalware will start, click on the “Scan” button.
Zemana AntiMalware will now scan computer for malicious files. This process can take up to 10 minutes.
When Zemana AntiMalware has finished it will display a list of all the malware that the program found. Click on the “Next” button, to remove the malicious files from your computer.

Zemana AntiMalware will now start to remove all the malicious programs from your computer. When the process is complete, you may need to restart your computer.

STEP 4: Reset your browser to default settings

If you are still experiencing issues with the Deftesrg.exe XMRig CPU Miner from Internet Explorer, Firefox or Chrome, we will need to reset your browser to its default settings.
This step should be performed only if your issues have not been solved by the previous steps.

Google Chrome

Google Chrome has an option that will reset itself to its default settings. You might need to do this if apps or extensions you installed changed your settings without your knowledge. Your saved bookmarks and passwords won’t be cleared or changed.

On your computer, open Google Chrome.
At the top right, click “More” (represented by the three dots) and then “Settings”
At the bottom, click “Show advanced settings”.
Under the section “Reset settings”, click Reset settings.
In the box that appears, click Reset.

Internet Explorer

You can reset Internet Explorer settings to return them to the state they were in when Internet Explorer was first installed on your PC.

Open Internet Explorer, click on the “gear icon” in the upper right part of your browser, then click again on Internet Options.
In the “Internet Options” dialog box, click on the “Advanced” tab, then click on the “Reset” button.
In the “Reset Internet Explorer settings” section, select the “Delete personal settings” check box, then click on “Reset” button.
When Internet Explorer has completed its task, click on the “Close” button in the confirmation dialogue box. You will now need to close your browser, and then you can open Internet Explorer again.

Mozilla Firefox

If you’re having problems with Firefox, resetting it can help. The reset feature fixes many issues by restoring Firefox to its factory default state while saving your essential information like bookmarks, passwords, web form auto-fill information, browsing history and open tabs.

In the upper-right corner of the Firefox window, click the Firefox menu button, then click on the “Help” button.
From the Help menu, choose Troubleshooting Information.
If you’re unable to access the Help menu, type about:support in your address bar to bring up the Troubleshooting information page.
Click the “Refresh Firefox” button in the upper-right corner of the “Troubleshooting Information” page.
To continue, click on the “Refresh Firefox” button in the new confirmation window that opens.
Firefox will close itself and will revert to its default settings. When it’s done, a window will list the information that was imported. Click on the “Finish“.

Your old Firefox profile will be placed on your desktop in a folder named “Old Firefox Data“. If the reset didn’t fix your problem you can restore some of the information not saved by copying files to the new profile that was created. If you don’t need this folder any longer, you should delete it as it contains sensitive information.

Your computer should now be free of the Deftesrg.exe malware.
If you are still experiencing problems while trying to remove Deftesrg.exe XMRig CPU Miner from your device, please do one of the following:

Run a system scan with Emsisoft Emergency Kit
Ask for help in our Malware Removal Assistance forum.

Here are 10 basic security tips to help you avoid malware and protect your device:

To avoid potential dangers on the internet, it's important to follow these 10 basic safety rules. By doing so, you can protect yourself from many of the unpleasant surprises that can arise when using the web.