Coinhive removal instructions
What is Coinhive?
Coinhive (also knows as XMR Miner) is a service that allows web developers to inject sites with scripts that employ visitors' computers to mine Monero cryptocurrency. The idea behind Coinhive is legitimate and this service itself is not harmful, however, some web developers who employ this service become greedy and take advantage of the system: cryptocurrency is mined without users' consent and use of system resources is not limited by them. As a result, these people often misuse up to 100% of system resources without permission.
As mentioned, users often visit malicious sites inadvertently - they are redirected by potentially unwanted adware-type programs (PUPs). These programs employ tools to deliver banner, pop-up, and other intrusive ads. A pop-up ad is essentially a new browser window in which a specific website is opened. All displayed ads can potentially lead to sites that use Coinhive. In this way, developers promote malicious websites using intrusive advertising. In addition, adware-type apps are likely to gather information relating to users' Internet browsing activity. Collected data might contain private details that developers later share with third parties (potentially, cyber criminals). Research shows that these people misuse private information to generate revenue - behavior that can lead to serious privacy issues or even identity theft. Therefore, the presence of a data-tracking app on your system might lead to serious privacy issues or even identity theft. Adware-type PUPs must be eliminated immediately.
Most adware-type applications are virtually identical. These programs offer "useful features" just to give the impression of legitimacy and trick users to install. Following infiltration, however, they deliver no real value for regular users. Their only purpose is to generate revenue for the developers, deliver intrusive advertisements, and record sensitive data.
How did potentially unwanted programs install on my computer?
To proliferate adware, developers use the aforementioned intrusive advertising and a deceptive marketing method called "bundling". Intrusive ads can lead to malicious websites and execute scripts that download and install malware/PUPs. "Bundling" is stealth installation of potentially unwanted programs with regular software/apps. Developers hide "bundled" apps within various sections (e.g., "Custom/Advanced" settings) of the download or installation processes. Furthermore, many users click intrusive ads and skip download/installation steps. This behavior often leads to inadvertent installation of potentially unwanted programs. In this way, users often expose their systems to risk of various infections and compromise their privacy.
How to avoid installation of potentially unwanted applications?
The main reasons for computer infections are poor knowledge and careless behavior - the key to safety is caution. Therefore, to prevent system infiltration by PUPs, be very cautious when browsing the Internet and especially when downloading/installing software. Criminals ensure that intrusive ads appear legitimate and, thus, it is extremely difficult to determine if they are genuine. Once clicked, however, they redirect to suspicious sites such as gambling, adult dating, pornography, or those that diminish system performance significantly. If you encounter these redirects, immediately remove all dubious applications and browser plug-ins. Remember also to carefully analyze each window of the download/installation dialogs, opt-out of all additionally-included programs and decline offers to download/install them. We also recommend that you download your apps from official sources only, using direct download links. Third party downloaders/installers are monetized using the "bundling" method and, therefore, these tools should not be used. Having a legitimate anti-virus/anti-spyware suite installed is also paramount.
Usage of computer CPU once a website with Coinhive script is opened:
Example of a website that uses Coinhive script (and doesn't disclose it to their users):
A deceptive free weather widget for websites that mines Monero cryptocurrency (via Conhive) when users visit the site that implemented it:
- What is Coinhive?
- STEP 1. Uninstall deceptive applications using Control Panel.
- STEP 2. Remove adware from Internet Explorer.
- STEP 3. Remove rogue extensions from Google Chrome.
- STEP 4. Remove potentially unwanted plug-ins from Mozilla Firefox.
- STEP 5. Remove rogue extensions from Safari.
- STEP 6. Remove rogue plug-ins from Microsoft Edge.
Removal of potentially unwanted programs:
Windows 7 users:
Click Start (Windows Logo at the bottom left corner of your desktop), choose Control Panel. Locate Programs and click Uninstall a program.
Windows XP users:
Click Start, choose Settings and click Control Panel. Locate and click Add or Remove Programs.
Windows 10 and Windows 8 users:
Right-click in the lower left corner of the screen, in the Quick Access Menu select Control Panel. In the opened window choose Programs and Features.
Mac OSX users:
Click Finder, in the opened screen select Applications. Drag the app from the Applications folder to the Trash (located in your Dock), then right click the Trash icon and select Empty Trash.
In the uninstall programs window, look for any suspicious/recently-installed applications, select these entries and click "Uninstall" or "Remove".
After uninstalling the potentially unwanted program, scan your computer for any remaining unwanted components or possible malware infections. To scan your computer, use recommended malware removal software.
Download recommended remover for
1) Download and install 2) Run system scan 3) Enjoy your clean computer!
Remove rogue extensions from Internet browsers:
Video showing how to remove potentially unwanted browser add-ons:
Remove malicious add-ons from Internet Explorer:
Click the "gear" icon (at the top right corner of Internet Explorer), select "Manage Add-ons". Look for any recently-installed suspicious browser extensions, select these entries and click "Remove".
If you continue to have problems with removal of the coinhive malware, reset your Internet Explorer settings to default.
Windows XP users: Click Start, click Run, in the opened window type inetcpl.cpl In the opened window click the Advanced tab, then click Reset.
Windows Vista and Windows 7 users: Click the Windows logo, in the start search box type inetcpl.cpl and click enter. In the opened window click the Advanced tab, then click Reset.
Windows 8 users: Open Internet Explorer and click the gear icon. Select Internet Options.
In the opened window, select the Advanced tab.
Click the Reset button.
Confirm that you wish to reset Internet Explorer settings to default by clicking the Reset button.
Remove malicious extensions from Google Chrome:
Click the Chrome menu icon (at the top right corner of Google Chrome), select "More tools" and click "Extensions". Locate all recently-installed suspicious browser add-ons, select these entries and click the trash can icon.
If you continue to have problems with removal of the coinhive malware, reset your Google Chrome browser settings. Click the Chrome menu icon (at the top right corner of Google Chrome) and select Settings. Scroll down to the bottom of the screen. Click the Advanced… link.
After scrolling to the bottom of the screen, click the Reset (Restore settings to their original defaults) button.
In the opened window, confirm that you wish to reset Google Chrome settings to default by clicking the Reset button.
Remove malicious plug-ins from Mozilla Firefox:
Click the Firefox menu (at the top right corner of the main window), select "Add-ons". Click "Extensions", in the opened window, remove all recently-installed suspicious browser plug-ins.
Computer users who have problems with coinhive malware removal can reset their Mozilla Firefox settings.
Open Mozilla Firefox, at the top right corner of the main window, click the Firefox menu, in the opened menu, click Help.
Select Troubleshooting Information.
In the opened window, click the Refresh Firefox button.
In the opened window, confirm that you wish to reset Mozilla Firefox settings to default by clicking the Refresh Firefox button.
Remove malicious extensions from Safari:
Make sure your Safari browser is active, click Safari menu, and select Preferences....
In the opened window click Extensions, locate any recently installed suspicious extension, select it and click Uninstall.
Make sure your Safari browser is active and click on Safari menu. From the drop down menu select Clear History and Website Data...
In the opened window select all history and click the Clear History button.
Remove malicious add-ons from Microsoft Edge:
Click the three horizontal dots icon (at the top right corner of Microsoft Edge), select "Extensions". Look for any recently-installed suspicious extensions, right click your mouse on these entries and click "Uninstall".
Click the three horizontal dots icon (at the top right corner of Microsoft Edge), and select Settings.
In the opened tab, click the "Choose what to clear" button.
Click Show more and select everything, and then click the "Clear" button.
- If this didn't help, please follow these alternative instructions explaining how to reset Microsoft Edge browser.
Commonly, adware or potentially unwanted applications infiltrate Internet browsers through free software downloads. Note that the safest source for downloading free software is via developers' websites only. To avoid installation of adware, be very attentive when downloading and installing free software. When installing previously-downloaded free programs, choose the custom or advanced installation options – this step will reveal any potentially unwanted applications listed for installation together with your chosen free program.
If you are experiencing problems while trying to remove coinhive malware from your computer, please ask for assistance in our malware support forum.
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