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CPU Miner. How to remove? (Uninstall guide)

removal by Jake Doevan - - | Type: Malware

CPU Miner – a Trojan horse which is used for mining cryptocurrency

Image of CPU Miner virus

CPU Miner is a malicious program that uses lots of computer’s CPU to mine digital currency. Crooks created numerous viruses to mine different cryptocurrency, including Bitcoins, Monero, Ethereoum, etc. The biggest problem is that users are not aware of this activity and experience serious computer-related problems.

CPU Miner malware typically spreads as a trojan horse. Therefore, users can be tricked into downloading it themselves. However, they might spread in software bundles and sneak into the system unnoticed.

What is more, during the past years security experts warned about countless cryptojacking cases when malicious cryptocurrency mining codes where injected into various websites.[1] Therefore, when users visit such sites, CPU Miner virus starts stealing their computer’s resources and making virtual money.

Among the most popular and widespread miners are:

Despite the variety of illegal CPU mining programs, they all behave similarly. Once they get into the system, they launch malicious processes that can be seen in the Windows Task Manager, for instance, minergate.exe, Intelmain.exe or others.

Processes that belong to cryptocurrency miner might use up to 90% of computer’s resources. This activity might lead to a damaged graphics card, computer overheating and increased electrical bill. Due to the high CPU usage, a computer becomes sluggish, programs might not respond or open.

Specialists from dieviren.de[2] warn that high CPU usage is dangerous for the computers. Therefore, if you do not want your device to get physically damaged, you have to remove CPU Miner immediately.

Questions about CPU Miner

We highly recommend using Reimage for CPU Miner removal. Security software can clean trojan horse from the device immediately. Additionally, our suggested tool can fix the damage that miner may have done to the system too.

Cryptocurrency miners use tricky methods to infiltrate devices

Crooks might spread CPU Miner virus as legitimate programs, browser extensions[3] or software updates. Therefore, users can get easily tricked into installing them themselves. For this reason, security experts recommend being careful when downloading free applications.

Before agreeing to install any software, you should:

  1. Check the information about the developer;
  2. Download programs from the official developer’s websites;
  3. Read user reviews about the program;
  4. Read EULA, Privacy policy or similar documents provided by developers.

However, cryptocurrency miners might also infiltrate the system silently. Creators of such malicious programs usually rely on bundling – a deceptive software marketing method which allows adding miner to the freeware or shareware package. Therefore, when a user does not pay attention to this procedure, she or he lets the miner stepping into the system. However, you can avoid that.

First of all, make sure you select Custom or Advanced installation of the freeware to get more knowledge about optional components. After doing so, you should uncheck all pre-checked check marks that may try to inform you about CpuMiner and other suspicious components.

New cryptojacking methods allow stealing CPU without installing any software

Nevertheless, trojan horses are quite effective infiltration strategy; cyber criminals found a more sophisticated method to mine digital coins. Criminals attack popular websites an inject malicious JavaScript code that allows mining cryptocurrency as soon as a visitor enters a compromised website.

Such cryptojacking attacks hit UK, USA and Australian government websites,[4] adult-themed, entertainment and many other sites. While some CPU Miners stop their activity when a user leaves a compromised website, others continue their job[5] by displaying a pop-under window that hides behind the clock on Windows taskbar.

Therefore, if you noticed that your browser became sluggish and your computer became very slow, you should open the Task Manager and attentively look through running processes. Stop all the suspicious entries that are using lots of CPU. If high CPU usage comes back, you should check the system for malicious software.

Identify and remove CPU Miner from your computer

Infiltration of miner might be hard to notice. However, if you are dealing with these problems, you might need to proceed with CPU Miner removal:

  • the general sluggishness of the computer;
  • an increased amount of ads, pop-ups and banners appearing on the browser;
  • browser redirects to tech support scam, fake update or other questionable websites;
  • suspicious processes running in the Task Manager;
  • installation of unknown programs or extensions.

To stop these activities and remove CPU Miner from the computer, you have to use a reputable malware removal program. Install new or update your current antivirus and run a full system scan. All major security vendors are capable of detecting and eliminating cryptocurrency miners.

However, our team highly recommends using either Reimage, Plumbytes Anti-MalwareNorton Internet Security or Malwarebytes. If you have some difficulties with malware removal, please follow the instructions given below. In some cases, trojans might block installation or access to security software to prevent elimination. However, you can still disable the virus.

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What to do if failed?
If you failed to remove virus damage using Reimage, submit a question to our support team and provide as much details as possible.
Reimage is recommended to remove virus damage. Free scanner allows you to check whether your PC is infected or not. If you need to remove malware, you have to purchase the licensed version of Reimage malware removal tool.
More information about this program can be found in Reimage review.

If you decided to select another anti-spyware, uninstall Reimage from your computer.
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Alternate Software
Malwarebytes
Alternate Software
Malwarebytes

To remove CPU Miner, follow these steps:

Remove CPU Miner using Safe Mode with Networking

If CPU Miner virus blocks security program, follow these steps:

  • Step 1: Reboot your computer to Safe Mode with Networking

    Windows 7 / Vista / XP
    1. Click Start Shutdown Restart OK.
    2. When your computer becomes active, start pressing F8 multiple times until you see the Advanced Boot Options window.
    3. Select Safe Mode with Networking from the list Select 'Safe Mode with Networking'

    Windows 10 / Windows 8
    1. Press the Power button at the Windows login screen. Now press and hold Shift, which is on your keyboard, and click Restart..
    2. Now select Troubleshoot Advanced options Startup Settings and finally press Restart.
    3. Once your computer becomes active, select Enable Safe Mode with Networking in Startup Settings window. Select 'Enable Safe Mode with Networking'
  • Step 2: Remove CPU Miner

    Log in to your infected account and start the browser. Download Reimage or other legitimate anti-spyware program. Update it before a full system scan and remove malicious files that belong to your ransomware and complete CPU Miner removal.

If your ransomware is blocking Safe Mode with Networking, try further method.

Remove CPU Miner using System Restore

This method can also help to remove miner from the PC automatically:

  • Step 1: Reboot your computer to Safe Mode with Command Prompt

    Windows 7 / Vista / XP
    1. Click Start Shutdown Restart OK.
    2. When your computer becomes active, start pressing F8 multiple times until you see the Advanced Boot Options window.
    3. Select Command Prompt from the list Select 'Safe Mode with Command Prompt'

    Windows 10 / Windows 8
    1. Press the Power button at the Windows login screen. Now press and hold Shift, which is on your keyboard, and click Restart..
    2. Now select Troubleshoot Advanced options Startup Settings and finally press Restart.
    3. Once your computer becomes active, select Enable Safe Mode with Command Prompt in Startup Settings window. Select 'Enable Safe Mode with Command Prompt'
  • Step 2: Restore your system files and settings
    1. Once the Command Prompt window shows up, enter cd restore and click Enter. Enter 'cd restore' without quotes and press 'Enter'
    2. Now type rstrui.exe and press Enter again.. Enter 'rstrui.exe' without quotes and press 'Enter'
    3. When a new window shows up, click Next and select your restore point that is prior the infiltration of CPU Miner. After doing that, click Next. When 'System Restore' window shows up, select 'Next' Select your restore point and click 'Next'
    4. Now click Yes to start system restore. Click 'Yes' and start system restore
    Once you restore your system to a previous date, download and scan your computer with Reimage and make sure that CPU Miner removal is performed successfully.

About the author

Jake Doevan
Jake Doevan - Computer technology expert

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References

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