Miners are hidden programs that use your PC or laptop resources to mine cryptocurrency without your consent. They slow down the system, increase the load on the processor and video card, and reduce the service life of the equipment. We tell you how to detect and eliminate such a threat.
What is a miner virus and why is it dangerous?
Miners penetrate PCs through infected files, pirated software, phishing links or browser scripts. Unlike classic viruses, they do not steal data, but they squeeze the maximum out of the hardware.This leads to overheating of components, increased electricity bills, decreased system performance and premature wear of the video card or processor. Some miners disguise themselves as legitimate processes, which makes them difficult to detect.
Signs of a miner Virus
You can suspect the presence of a miner based on several symptoms:
- The computer starts to “slow down” even when performing simple tasks, such as working with a text editor or browsing the web;
- The fans make noise at maximum speed for no apparent reason, which is often associated with increased load on the processor or video card;
- In the Task Manager, you may notice processes with strange names (for example, xmrig.exe, cgminer.exe) that load the CPU or GPU by 70–100%.
- The Task Manager does not open or closes after a few seconds – this may indicate a blocking by the miner;
- A sharp increase in Internet traffic, although you are not downloading anything;
- Increased temperature of the processor or video card, which can be tracked using programs such as HWMonitor or MSI Afterburner.
How to find miner virus on PC
To detect a miner, start by analyzing processes via Task Manager. Press Ctrl + Shift + Esc, go to the Processes tab, and sort them by CPU or GPU load. Look for suspicious names like miner, cryptonight, or xmr. If a process seems unfamiliar, copy its name and check it via a search engine.
The standard Task Manager sometimes does not display hidden processes. In such cases, use advanced tools:
- rocess Explorer – shows detailed information about each process, including associated files and services;
- AnVir Task Manager – helps track startup and hidden services;
- GPU-Z – monitors the load on the video card, which is especially useful for identifying GPU miners.
Don’t forget to check your browser, as some miners are launched via malicious extensions or tabs. Open your browser settings, go to the “Extensions” section and remove items with obscure names or low ratings.
Also check your active tabs – close those that consume too many resources.
First, disconnect the internet to interrupt the miner’s connection to the server. This can be done through the network settings or by physically disconnecting the cable. Without internet access, the miner will not be able to transmit data or receive new commands, which will make it easier to remove.
End suspicious tasks and processes that are heavily loading your computer. Open the Task Manager, find the suspicious process, right-click on it and select End Task. If the manager is blocked, reboot your PC in safe mode (press F8 when booting) and try again. Safe mode loads only essential services, making it easier to detect the miner.
Check your startup processes. Press Win + R, enter msconfig and open the Startup tab. Disable programs with strange names or suspicious paths. You can also use CCleaner for a more detailed analysis of startup.
Run a full system scan with an antivirus. The following have proven themselves well:
- Malwarebytes – specializes in combating miners and other threats;
- Dr.Web CureIt! is a portable utility for quick checking;
- Kaspersky Virus Removal Tool – effectively removes hidden threats.
If the standard antivirus does not cope, use portable utilities such as AdwCleaner or Zemana AntiMalware . These programs do not require installation and can be launched from a flash drive.
Clean registry sections and unnecessary files. Press Win + R, enter regedit and delete the miner entries in the sections:
- HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run;
- HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Run.
Also check the folders C:\Program Files, C:\Windows\Temp and AppData\Roaming – delete all files related to the miner. If you are not sure about the purpose of the file, check it through the search engine.
Check the processes in the Task Scheduler. Enter taskschd.msc in the Run window and look for tasks with suspicious names (for example, UpdateChecker or ServiceHost). Delete them so that the miner does not activate again.
What to do if the miner is not removed
If the miner is not removed using standard methods, try to “roll back” to an earlier state using a restore point. To do this:
- Press Win + R, type rstrui and press Enter;
- Select a restore point created before the infection symptoms appeared;
- Confirm the recovery and wait for the process to complete.
System Restore rolls back all changes, including installation of malware, but does not affect personal files. If there are no restore points or they do not help, then only a complete reinstallation of Windows with the deletion of personal data will help.
Use an antivirus with a real-time protection feature, such as Kaspersky Standard or Dr.Web Security Space. These programs block suspicious processes before they are launched.Additional protection will be provided by the browser extensions ” No Coin ” and ” MinerBlock “. They prevent cryptomining scripts from running on web pages. Also, monitor the system load: if the computer starts to “slow down” for no reason, check the processes through the “Task Manager” or specialized utilities.
