Severity scale:  
  (55/100)

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

removal by Julie Splinters - - | Type: Malware

JS:Miner-c is a dangerous cryptocurrency miner lurking in the cyberspace

The image of JSMiner-C detection
JS:Miner-c is a trojan horse as seen detected by antivirus software

Questions about JSMiner-C

JS:Miner-c is a term which is used by antivirus programs to identify a dangerous Trojan horse virus. This cyber threat possesses a wide range of capabilities, including secretly mining cryptocurrency (Monero, Bitcoin, etc.) on targeted machines, track and record personal and technical information, or even serve as a backdoor to various other malware. Experts categorize this infection similar to Minergate virus as both of them can not only damage computer systems but infiltrate with other cyber threats as well. Thus, it vital to get rid of JS:Miner-c promptly.

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 Extremely high CPU and GPU usage
Distribution Spreads as malicious email attachments, or is disguised as legitimate software on P2P sites
Removal You can get rid of JS:Miner-c and similar cryptocurrency miners with Reimage

If you wonder what is JS:Miner-c, 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 behind JS:Miner-c trojan virus are not going to do that.

Have in mind that JS:Miner-c 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 the following potentially unwanted programs (PUPs) and other dangerous malware:[1]

  • Browser hijackers;
  • Adware-type applications;
  • Ransomware;
  • Trojan horses.

Note that once you enter a 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 JS:Miner-c from your system which is the primary cause why you are redirected to such websites.

JS:Miner-c virus picture
JS:Miner-c is programmed to mine Monero cryptocurrency.

If you ignore JS:Miner-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, alon with increased electricity bills.

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 other issues related to JS:Miner-c virus as well:

  • Continuous freezes;
  • Slowdowns;
  • Sluggish system. 

For all the reasons mentioned above, we strongly suggest you remove JS:Miner-c from both, Mac and Windows operating systems. You can employ a professional security software, like Reimage or Plumbytes Anti-MalwareNorton Internet Security.

Additionally, we would like to warn you that successful JS:Miner-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.

Beware of suspicious emails and dubious sites

One of the most prominent malware distribution methods is malicious attachments or links inside a phishing email. Bad actors often employ bots that are capable of sending thousands of emails to innocent users. Therefore, it is vital to recognize a scam email by the following signs:

  • grammar or/and spelling mistakes present;
  • the author presents himself as a representative of a high profile organization;
  • the “From” address is not genuine (even if it might look so at first glance);
  • attachments (such as .zip, .rar, .pdf, .doc, .html) or cleverly hidden hyperlinks present.

Thus, carefully check the message before proceeding with any actions. Another way to prevent malware would be scanning the attachment before opening it.

Furthermore, 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 (for example, the malicious pop-up might be disguised as fake update). 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.

You can uninstall JS:Miner-c with an antivirus software

If you consider whether JS:Miner-c removal is necessary, we can assure you that this is the only way to protect your computer's well-being. Note that this malware not only deteriorates it performance but it can also infiltrate the system with other potentially dangerous infections. Thus, get rid of it as soon as possible.

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 JS:Miner-c virus. However, feel free to use any other malware removal tool of your choice. 

LosVirus.es[3] team warns that users should remove JS:Miner-c virus manually, at will most likely fail and can damage the compromised system even more.

 

 

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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.
Press mentions on Reimage
Alternate Software
Malwarebytes
We have tested Malwarebytes's efficiency in removing JSMiner-C (2018-08-01)
Malwarebytes
We have tested Malwarebytes's efficiency in removing JSMiner-C (2018-08-01)

To remove JSMiner-C, follow these steps:

Remove JSMiner-C using Safe Mode with Networking

To eliminate JS:Miner-c trojan from your PC safely, enter Safe Mode with Networking:

  • 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 JSMiner-C

    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 JSMiner-C removal.

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

Remove JSMiner-C using System Restore

You can use System Restore to stop the malware:

  • 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 JSMiner-C. 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 JSMiner-C removal is performed successfully.

About the author

Julie Splinters
Julie Splinters - Malware removal specialist

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References

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