This article aims to show you how you can remove the JS/CoinMiner malware completely from your computer and how you can protect your computer against future infections as well.
A new JavaScript miner malware has appeared, infecting computers via websites that have it embedded on it, detected as JS/CoinMiner. The malware utilizes the CPU and GPU of your computer in order to mine for cryptocurrencies, like Monero and BitCoin at your expense. If you have come across the JS/CoinMiner threat, we recommend you to immediately scan you computer for other malware as well and remove any viruses, that may be redirecting you to websites causing JS/CoinMiner infections.
Threat Summary
| Name | JS/CoinMiner |
| Type | JavaScript Miner Malware |
| Short Description | When this malware infects your computer, it may begin to use your central processor and video card’s resources in order to mine for the cryptocurrencies BitCoin or Monero. |
| Symptoms | No symptoms besides your CPU and GPU becoming overheated, as this malware tries to stay undetectable for longer periods of time. |
| Distribution Method | Via compromised websites or sites that embedded it. |
| Detection Tool |
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User Experience | Join Our Forum to Discuss JS/CoinMiner. |
How Did I Get JS/CoinMiner Malware on My PC
The JS/CoinMiner cyber-threat is spread via more than one method. It is a JavaScript type of attack which means that it is a piece of code, utilized to download the malware on your computer via such script and automatically execute it. Such JavaScript code is usually embedded on suspicious and malicious websites, like torrent sites or other unconfirmed websites that aim to make profit at your CPU and GPU’s expense. Such sites have so far confirmed to come in the hundreds, including ThePirateBay, the world’s largest torrent tracker. So bottom line is, if you want to stay protected from JS/CoinMiner, you should install an advanced anti-malware software which unlike traditional protection programs uses a protection shield that is in real time against low-level threats, like JS/CoinMiner and can stop them before they have infected your PC.
JS/CoinMiner – More Information
Once your computer has been infected with JS/CoinMiner, the virus may drop an executable file somewhere on your computer. This file may be located in the following malicious Windows folders:
- %AppData%
- %Local%
- %LocalLow%
- %Roaming%
- %Temp%
After the malicious file is dropped on your computer, the malware may also begin to execute various different types of commands to run the file automatically as an administrator. The malicious executable of JS/CoinMiner may also become fileless after it has been ran once on your PC and mine while you are online. The primary symptom of noticing this malware Is if your CPU or GPU usage(or both) is highly elevated without you using anything actively on your computer system.
Furthermore, since JS/CoinMiner is the type of malware that is intrusive, it may also obtain information about your computer, such as:
- Any BitCoin wallets installed on it.
- Passwords and registration accounts.
- System information.
- Network information.
- Take screenshots.
- Log keystrokes.
Although this is not confirmed, the malware may have embedded in it’s script, instructions that may help it to self-update and remain hidden for longer periods of time on your computer system.
Remove JS/CoinMiner Malware from Your Computer
Similar to Coinhive JS miner , this infection should be isolated before actually removing it, since it may be more complicated than it seems. Since having to manually look for the threat may take time, we have created simple instructions down below which show you in few simple steps how to isolate the JS/CoinMiner
Malware and remove it automatically from your computer. Malware researchers and cyber-sec experts often advise to perform a scan with an advanced anti-malware software to discover other malware, besides JS/CoinMiner on your computer and remove all malicious objects effectively as well as protect your PC against future malware as well.
Ventsislav Krastev
Ventsislav is a cybersecurity expert at SensorsTechForum since 2015. He has been researching, covering, helping victims with the latest malware infections plus testing and reviewing software and the newest tech developments. Having graduated Marketing as well, Ventsislav also has passion for learning new shifts and innovations in cybersecurity that become game changers. After studying Value Chain Management, Network Administration and Computer Administration of System Applications, he found his true calling within the cybersecrurity industry and is a strong believer in the education of every user towards online safety and security.
Follow Me:
- Guide 1: How to Remove JS/CoinMiner from Windows.
- Guide 2: Get rid of JS/CoinMiner from Mac OS X.
- Guide 3: Remove JS/CoinMiner from Google Chrome.
- Guide 4: Erase JS/CoinMiner from Mozilla Firefox.
- Guide 5: Uninstall JS/CoinMiner from Microsoft Edge.
- Guide 6: Remove JS/CoinMiner from Safari.
- Guide 7: Eliminate JS/CoinMiner from Internet Explorer.
Windows Mac OS X Google Chrome Mozilla Firefox Microsoft Edge Safari Internet Explorer
How to Remove JS/CoinMiner from Windows.
Step 1: Boot Your PC In Safe Mode to isolate and remove JS/CoinMiner
Step 2: Uninstall JS/CoinMiner and related software from Windows
Here is a method in few easy steps that should be able to uninstall most programs. No matter if you are using Windows 10, 8, 7, Vista or XP, those steps will get the job done. Dragging the program or its folder to the recycle bin can be a very bad decision. If you do that, bits and pieces of the program are left behind, and that can lead to unstable work of your PC, errors with the file type associations and other unpleasant activities. The proper way to get a program off your computer is to Uninstall it. To do that:
Follow the instructions above and you will successfully uninstall most programs.
Step 3: Clean any registries, created by JS/CoinMiner on your computer.
The usually targeted registries of Windows machines are the following:
- HKEY_LOCAL_MACHINE\Software\Microsoft\Windows\CurrentVersion\Run
- HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Run
- HKEY_LOCAL_MACHINE\Software\Microsoft\Windows\CurrentVersion\RunOnce
- HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\RunOnce
You can access them by opening the Windows registry editor and deleting any values, created by JS/CoinMiner there. This can happen by following the steps underneath:
Tip: To find a virus-created value, you can right-click on it and click "Modify" to see which file it is set to run. If this is the virus file location, remove the value.
Before starting "Step 4", please boot back into Normal mode, in case you are currently in Safe Mode.
This will enable you to install and use SpyHunter 5 successfully.
Windows Mac OS X Google Chrome Mozilla Firefox Microsoft Edge Safari Internet Explorer
Get rid of JS/CoinMiner from Mac OS X.
Step 1: Uninstall JS/CoinMiner and remove related files and objects
1. Hit the ⇧+⌘+U keys to open Utilities. Another way is to click on “Go” and then click “Utilities”, like the image below shows:
- Go to Finder.
- In the search bar type the name of the app that you want to remove.
- Above the search bar change the two drop down menus to “System Files” and “Are Included” so that you can see all of the files associated with the application you want to remove. Bear in mind that some of the files may not be related to the app so be very careful which files you delete.
- If all of the files are related, hold the ⌘+A buttons to select them and then drive them to “Trash”.
In case you cannot remove JS/CoinMiner via Step 1 above:
In case you cannot find the virus files and objects in your Applications or other places we have shown above, you can manually look for them in the Libraries of your Mac. But before doing this, please read the disclaimer below:
You can repeat the same procedure with the following other Library directories:
→ ~/Library/LaunchAgents
/Library/LaunchDaemons
Tip: ~ is there on purpose, because it leads to more LaunchAgents.
Step 2: Scan for and remove JS/CoinMiner files from your Mac
When you are facing problems on your Mac as a result of unwanted scripts and programs such as JS/CoinMiner, the recommended way of eliminating the threat is by using an anti-malware program. SpyHunter for Mac offers advanced security features along with other modules that will improve your Mac’s security and protect it in the future.
Windows Mac OS X Google Chrome Mozilla Firefox Microsoft Edge Safari Internet Explorer
Remove JS/CoinMiner from Google Chrome.
Step 1: Start Google Chrome and open the drop menu
Step 2: Move the cursor over "Tools" and then from the extended menu choose "Extensions"
Step 3: From the opened "Extensions" menu locate the unwanted extension and click on its "Remove" button.
Step 4: After the extension is removed, restart Google Chrome by closing it from the red "X" button at the top right corner and start it again.
Windows Mac OS X Google Chrome Mozilla Firefox Microsoft Edge Safari Internet Explorer
Erase JS/CoinMiner from Mozilla Firefox.
Step 1: Start Mozilla Firefox. Open the menu window
Step 2: Select the "Add-ons" icon from the menu.
Step 3: Select the unwanted extension and click "Remove"
Step 4: After the extension is removed, restart Mozilla Firefox by closing it from the red "X" button at the top right corner and start it again.
Windows Mac OS X Google Chrome Mozilla Firefox Microsoft Edge Safari Internet Explorer
Uninstall JS/CoinMiner from Microsoft Edge.
Step 1: Start Edge browser.
Step 2: Open the drop menu by clicking on the icon at the top right corner.
Step 3: From the drop menu select "Extensions".
Step 4: Choose the suspected malicious extension you want to remove and then click on the gear icon.
Step 5: Remove the malicious extension by scrolling down and then clicking on Uninstall.
Windows Mac OS X Google Chrome Mozilla Firefox Microsoft Edge Safari Internet Explorer
Remove JS/CoinMiner from Safari.
Step 1: Start the Safari app.
Step 2: After hovering your mouse cursor to the top of the screen, click on the Safari text to open its drop down menu.
Step 3: From the menu, click on "Preferences".
Step 4: After that, select the 'Extensions' Tab.
Step 5: Click once on the extension you want to remove.
Step 6: Click 'Uninstall'.
A pop-up window will appear asking for confirmation to uninstall the extension. Select 'Uninstall' again, and the JS/CoinMiner will be removed.
Windows Mac OS X Google Chrome Mozilla Firefox Microsoft Edge Safari Internet Explorer
Eliminate JS/CoinMiner from Internet Explorer.
Step 1: Start Internet Explorer.
Step 2: Click on the gear icon labeled 'Tools' to open the drop menu and select 'Manage Add-ons'
Step 3: In the 'Manage Add-ons' window.
Step 4: Select the extension you want to remove and then click 'Disable'. A pop-up window will appear to inform you that you are about to disable the selected extension, and some more add-ons might be disabled as well. Leave all the boxes checked, and click 'Disable'.
Step 5: After the unwanted extension has been removed, restart Internet Explorer by closing it from the red 'X' button located at the top right corner and start it again.
