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JSMiner-C. How to remove? (Uninstall guide)

removal by Julie Splinters - - | Type: Malware

JS:Miner-C is a malicious trojan horse which is used for mining Monero cryptocurrency

The image of JSMiner-C detection

JS:Miner-C virus is a specific term used to describe a malicious program designed to help the hackers mine Monero currency. Similarly to Minergate virus, this malware causes redirects to websites which are programmed to exploit computing power when the page is opened and generate cryptocurrency. Such actions caused by JS Miner-C can not only cause serious problems on your system, but can also infiltrate other dangerous computer threats.

Name JS:Miner-C
Also known as JSMiner-C; JS:Miner-C [Trj]; JS/Miner.C
Type Trojan horse
Main activities Mining of Monero and similar types of cryptocurrency
Symptoms System slow downs, crashes

If you wonder what JS:Miner-C [Trj] orJS:Miner-C is, this is merely a name for the infection used by antivirus systems to warn users. At the moment, you can receive an alert with such name from Avast. The term refers to the crypto-mining malware designed to redirect users to infected websites which are misusing the legitimate script from Coinhive — Monero JavaScript miner. According to Coinhive's Terms of Use, authors of the site MUST warn users about mining. However, it is more than obvious that hackers are not going to do that.

Have in mind that JS:Miner-C malware will never lead you to trustworthy sites. In fact, they cannot only use your computer's power to mine cryptocurrency, but can also infect your system with potentially unwanted programs (PUPs)[1], such as browser hijackers, adware-type applications or even Trojan horses. Therefore, we strongly advise you to get rid of miners to protect your system.

Note that once you appear on the bogus website, it will use excessive amounts of CPU power while the page is open. The temporary way to stop the site from misusing your computer's resources is to close it immediately. However, this will not remove JSMiner-C from your system which is the primary cause why you are redirected to such websites.

If you ignore JSMiner-C Avast detection, there are numerous computer-related issues you may face. High CPU usage forces your computer to work at high temperatures for long periods of time. Likewise, after some time you will first notice a significant decrease in your PC performance.

Also, be aware that mining cryptocurrency usually takes up to 100% of CPU[2] and there are no resources left for performing other vital system processes. As a result, your programs will crash or it will take a lot of time for them to load. Moreover, you might face continues freezes, slowdowns and your system becomes sluggish when JSMiner-C virus is present. 

For all the reasons mentioned above, we strongly suggest you remove JSMiner-C from both, Mac and Windows operating systems. You can employ a professional security software, like Reimage or Malwarebytes Anti Malware. However, those who do not prefer downloading additional programs can use manual elimination guidelines below.

Additionally, we would like to warn you that successful JSMiner-C removal requires you to get rid of all its malicious components. Since this malware has adware-like features, it is vital to delete all suspicious entries from your browsers. Instructions on how to do that are also provided at the end of this article.

Malware can reach your system with free programs

Even though this Monero miner is more dangerous than simple potentially unwanted programs (PUPs), they are distributed similarly — malware is hidden inside the installer of free applications. Such distribution method is often called bundling, when the developers of freeware employ pay-per-install marketing scheme and receive revenue from each user who has downloaded the malware. 

Luckily, there is a way how you can protect your system from the infiltration of various potentially unwanted programs, including the crypto-mining malware. You can detect the additional software in the installer if you choose Advanced or Custom installation mode. It doesn't skip the steps during the procedure, and the malware appears as a pre-selected checkmark, like “Get XXX now.”

It is crucial to un-tick those marks if you want to reject the installation of additional software. However, Monero miner can also be distributed via malware-laden ads which look incredibly genuine. Likewise, you must not only monitor the software installation procedure but also pay close attention when browsing the Internet.

We suggest you stay away from all types of ads you can encounter online. Note that developers aim to make them look genuine and trick credulous people into clicking on them. Unfortunately, most of the times you might either fall into the trap of scammers who are offering fake and expensive products or manually infiltrate malware.

JSMiner-C removal procedure explained

It is essential to understand that crypto-mining malware is a complex and dangerous cyber threat. It can not only secretly enter your system without your consent, but also let other high-risk computer infections in. Therefore, automatic JSMiner-C removal is the best option if you want to protect your PC.

For that, we strongly recommend employing one of the antivirus tools mentioned below. They are designed to help you eliminate various potentially unwanted programs with a few clicks. Thus, this is the easiest way to get rid of JSMiner-C virus. However, feel free to use any other malware removal tool of your choice. 

If you are an experienced computer user, we offer you to remove JSMiner-C with the help of manual elimination guidelines below. Although, LosVirus.es[3] team says that you should be aware that trying to terminate Monero miner manually will take time and patience. 

You can remove JSMiner-C automatically with a help of one of these programs: Reimage, Plumbytes Anti-MalwareWebroot SecureAnywhere AntiVirus, Malwarebytes Anti Malware. We recommend these applications because they can easily delete potentially unwanted programs and viruses with all their files and registry entries that are related to them.

We might be affiliated with any product we recommend on the site. Full disclosure in our Agreement of Use. By Downloading any provided Anti-spyware software to remove JSMiner-C you agree to our privacy policy and agreement of use.
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What to do if failed?
If you failed to remove infection using Reimage, submit a question to our support team and provide as much details as possible.
Reimage is recommended to uninstall JSMiner-C. 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.
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Manual JSMiner-C Removal Guide:

WindowsMac OS XInternet ExplorerMicrosoft EdgeFirefoxGoogle ChromeSafari

Eliminate JSMiner-C from Windows systems

Adware programs have numerous components which help them to redirect users to malicious websites. If you want to remove JSMiner-C and stop it from exploiting your CPU power, follow the guide below. It is designed for Windows OS users.

  1. Click Start Control Panel Programs and Features (if you are Windows XP user, click on Add/Remove Programs). Click 'Start -> Control Panel -> Programs and Features' (if you are 'Windows XP' user, click on 'Add/Remove Programs').
  2. If you are Windows 10 / Windows 8 user, then right-click in the lower left corner of the screen. Once Quick Access Menu shows up, select Control Panel and Uninstall a Program. If you are 'Windows 10 / Windows 8' user, then right-click in the lower left corner of the screen. Once 'Quick Access Menu' shows up, select 'Control Panel' and 'Uninstall a Program'.
  3. Uninstall JSMiner-C and related programs
    Here, look for JSMiner-C or any other recently installed suspicious programs.
  4. Uninstall them and click OK to save these changes. Right click on each of suspicious entries and select 'Uninstall'
WindowsMac OS XInternet ExplorerMicrosoft EdgeFirefoxGoogle ChromeSafari

Delete JSMiner-C from Mac OS X system

  1. If you are using OS X, click Go button at the top left of the screen and select Applications. Cick 'Go' and select 'Applications'
  2. Wait until you see Applications folder and look for JSMiner-C or any other suspicious programs on it. Now right click on every of such entries and select Move to Trash. Click on every malicious entry and select 'Move to Trash'
WindowsMac OS XInternet ExplorerMicrosoft EdgeFirefoxGoogle ChromeSafari

Remove JSMiner-C from Internet Explorer (IE)

It is crucial to eliminate all suspicious entries from Internet Explorer to uninstall JSMiner-C for good.

  1. Remove dangerous add-ons
    Open Internet Explorer, click on the Gear icon (IE menu) on the top right corner of the browser and choose Manage Add-ons. Click on menu icon and select 'Manage add-ons'
  2. You will see a Manage Add-ons window. Here, look for JSMiner-C and other suspicious plugins. Disable these entries by clicking Disable: Right click on each of malicious entries and select 'Disable'
  3. Change your homepage if it was altered by virus:
    Click on the gear icon (menu) on the top right corner of the browser and select Internet Options. Stay in General tab.
  4. Here, remove malicious URL and enter preferable domain name. Click Apply to save changes. Delete malicious URL, enter your desired domain name and click 'Apply' to save changes
  5. Reset Internet Explorer
    Click on the gear icon (menu) again and select Internet options. Go to Advanced tab.
  6. Here, select Reset.
  7. When in the new window, check Delete personal settings and select Reset again to complete JSMiner-C removal. Go to 'Advanced' tab and click on 'Reset' button. Now select 'Delete personal settings' and click on 'Reset' button again
WindowsMac OS XInternet ExplorerMicrosoft EdgeFirefoxGoogle ChromeSafari

Get rid of JSMiner-C from Microsoft Edge

Reset Microsoft Edge settings (Method 1):

  1. Launch Microsoft Edge app and click More (three dots at the top right corner of the screen).
  2. Click Settings to open more options.
  3. Once Settings window shows up, click Choose what to clear button under Clear browsing data option. Go to Settings and select 'Choose what to clear'
  4. Here, select all what you want to remove and click Clear. Select 'Clear' button
  5. Now you should right-click on the Start button (Windows logo). Here, select Task Manager. Open the start menu and select 'Task Manager'
  6. When in Processes tab, search for Microsoft Edge.
  7. Right-click on it and choose Go to details option. If can’t see Go to details option, click More details and repeat previous steps. Right-click 'Microsoft Edge' and select 'Go to details' Select 'More details' if 'Go to details' option fails to show up
  8. When Details tab shows up, find every entry with Microsoft Edge name in it. Right click on each of them and select End Task to end these entries. Find Microsoft Edge entries and select 'End Task'

Resetting Microsoft Edge browser (Method 2):

If Method 1 failed to help you, you need to use an advanced Edge reset method.

  1. Note: you need to backup your data before using this method.
  2. Find this folder on your computer: C:\Users\%username%\AppData\Local\Packages\Microsoft.MicrosoftEdge_8wekyb3d8bbwe.
  3. Select every entry which is saved on it and right click with your mouse. Then Delete option. Go to Microsoft Edge folder on your computer, right-click every entry and click 'Delete'
  4. Click the Start button (Windows logo) and type in window power in Search my stuff line.
  5. Right-click the Windows PowerShell entry and choose Run as administrator. Find Windows PowerShell, right-click it and select 'Run as administrator'
  6. Once Administrator: Windows PowerShell window shows up, paste this command line after PS C:\WINDOWS\system32> and press Enter:
    Get-AppXPackage -AllUsers -Name Microsoft.MicrosoftEdge | Foreach {Add-AppxPackage -DisableDevelopmentMode -Register $($_.InstallLocation)\AppXManifest.xml -Verbose}
    Copy and paste a required command and press 'Enter'

Once these steps are finished, JSMiner-C should be removed from your Microsoft Edge browser.

WindowsMac OS XInternet ExplorerMicrosoft EdgeFirefoxGoogle ChromeSafari

Erase JSMiner-C from Mozilla Firefox (FF)

  1. Remove dangerous extensions
    Open Mozilla Firefox, click on the menu icon (top right corner) and select Add-ons Extensions. Click on menu icon and select 'Add-ons'
  2. Here, select JSMiner-C and other questionable plugins. Click Remove to delete these entries. Select 'Extensions' and look for malicious entries. Click 'Remove' to get rid of each of them
  3. Reset Mozilla Firefox
    Click on the Firefox menu on the top left and click on the question mark. Here, choose Troubleshooting Information. Click on menu icon and then on '?'. Select 'Troubleshooting Information'
  4. Now you will see Reset Firefox to its default state message with Reset Firefox button. Click this button for several times and complete JSMiner-C removal. Click on 'Reset Firefox' button for a couple of times
WindowsMac OS XInternet ExplorerMicrosoft EdgeFirefoxGoogle ChromeSafari

Uninstall JSMiner-C from Google Chrome

You must delete malicious browser extensions to stop JSMiner-C from redirecting you to websites with Coinhive's script on Chrome.

  1. Delete malicious plugins
    Open Google Chrome, click on the menu icon (top right corner) and select Tools Extensions. Click on menu icon. Select 'Tools' and 'Extensions'
  2. Here, select JSMiner-C and other malicious plugins and select trash icon to delete these entries. Look for malicious entries and delete each of them by clicking on the Trash bin icon
  3. Click on menu icon again and choose Settings Manage Search engines under the Search section. When in 'Settings', select 'Manage search engines...'
  4. When in Search Engines..., remove malicious search sites. You should leave only Google or your preferred domain name. Click 'X' to remove malicious URLs
  5. Reset Google Chrome
    Click on menu icon on the top right of your Google Chrome and select Settings.
  6. Scroll down to the end of the page and click on Reset browser settings. When in 'Settings', scroll down to 'Reset browser settings' button and click on it
  7. Click Reset to confirm this action and complete JSMiner-C removal. Click on 'Reset' button to complete your removal
WindowsMac OS XInternet ExplorerMicrosoft EdgeFirefoxGoogle ChromeSafari

Eliminate JSMiner-C from Safari

  1. Remove dangerous extensions
    Open Safari web browser and click on Safari in menu at the top left of the screen. Once you do this, select Preferences. Click on 'Safari' and select 'Preferences'
  2. Here, select Extensions and look for JSMiner-C or other suspicious entries. Click on the Uninstall button to get rid each of them. Go to 'Extensions' and uninstall malicious add-ons
  3. Reset Safari
    Open Safari browser and click on Safari in menu section at the top left of the screen. Here, select Reset Safari.... Click on 'Safari' and select 'Reset Safari...'
  4. Now you will see a detailed dialog window filled with reset options. All of those options are usually checked, but you can specify which of them you want to reset. Click the Reset button to complete JSMiner-C removal process. Select all options and click on 'Reset' button

About the author

Julie Splinters - Malware removal specialist

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