How to uninstall Ultra Clear or other mining malware?

Also Known As: Cryptomining malware
Type: Mac Virus
Distribution: Low
Damage level: Severe

How to remove Bitcoin miner from Mac?

What is Bitcoin cryptocurrency-mining malware?

There are many fake applications that mimic the look and/or functionality of legitimate apps and, once installed, perform malicious actions (e.g., generate advertisements, collect sensitive data). In this example a fake app called Ultra Clear mimics cryptocurrency wallet manager but, in reality, it uses user's computer hardware to mine cryptocurrency.

Ultra Clear Bitcoin Miner

Cryptocurrency mining is a computationally intensive task that uses computer's processor, graphics card, and/or other hardware. Therefore, cryptocurrency-mining malware like Ultra Clear uses infected computers to perform this task. This particular app mines Bitcoin. Typically, cryptocurrency mining significantly affects computer performance which could result in system crashes, hardware overheat, and other issues. Also, mining process causes increased power consumption. Therefore, users of computers that are infected with cryptomining malware like Ultra Clear receive higher electricity bills. Simply said, cyber criminals who successfully trick users into installing cryptocurrency miners are the only ones who benefit from it. If some miner is installed on the operating system and it was not installed intentionally, then it should be removed as soon as possible.

Threat Summary:
Name Cryptomining malware
Threat Type Cryptomining malware
Detection Names (UltraClear-Qt.dmg) Avast (MacOS:BitCoinMiner-BT [PUP]), BitDefender (Gen:Variant.Application.MAC.Miner.6), Emsisoft (Gen:Variant.Application.MAC.Miner.6 (B)), Kaspersky (Not-a-virus:HEUR:RiskTool.OSX.Miner.l), Full List (VirusTotal)
Detection Names (Ultra Clear) Avast (MacOS:BitCoinMiner-BT [PUP]), BitDefender (Gen:Variant.Application.MAC.Miner.6), ESET-NOD32 (A Variant Of OSX/CoinMiner.AU Potentially Unwanted), Kaspersky (Not-a-virus:HEUR:RiskTool.OSX.Miner.l), Full List (VirusTotal)
Symptoms High CPU, GPU (or other hardware) usage, unexpected shutdowns, system crashes
Distribution methods Shady websites, infected email attachments, malicious online advertisements, social engineering, software 'cracks'.
Damage Hardware overheat, system crashes, slow computer performance, higher electricity bills
Malware Removal (Mac)

To eliminate possible malware infections, scan your Mac with legitimate antivirus software. Our security researchers recommend using Combo Cleaner.
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Bird Miner and LoudMiner are a couple examples of other cryptomining malware. All of them are used for the same purpose - to mine cryptocurrency using computer resources. The only main difference between miners is what cryptocurrency they are designed to mine. As mentioned in the previous paragraph, a given example (the app called Ultra Clear) mines Bitcoin.

How did malware install on my computer?

Usually cyber criminals distribute malware via certain Trojans, malspam emails, fake software updating tools, software 'cracking' tools and questionable file and/or software download sources. Trojan is a type of malware that can be used to proliferate other malware by designing it to cause chain infections. Once a certain Trojan is installed on the operating system, then it causes installation of additional malware. When cyber criminals proliferate malware through spam campaigns, they send emails that contains malicious attachments (or website links designed to download malicious files). In such cases malicious software gets installed when recipients open a malicious attachment (or a file downloaded through a link). Typically, cyber criminals attach files such as Microsoft Office documents, archive files (like ZIP, RAR), executable files (like .exe), PDF documents, and JavaScript files.

Fake software updating tools usually are designed to distribute malware either by exploiting bugs, flaws of installed software that is out of date, or simply installing it instead of updates, fixes. Software 'cracking'/unofficial activation tools supposed to illegally bypass activation of licensed software. Nevertheless, it is common that they install some malicious one instead. Unofficial websites, free file hosting, freeware download websites, third party downloaders, Peer-to-Peer networks (e.g., torrent clients, eMule) are examples of download sources that can be used to distribute malware by tricking users into downloading and opening malicious files. Typically, those files are disguised as regular, legitimate.

How to avoid installation of malware?

Attachments (or web links) in irrelevant emails that are received from unknown, suspicious addresses should not be opened. Programs (and files) should not be downloaded through third party downloaders, Peer-to-Peer networks, from unofficial sites, and so on. It is advisable to use only official, trustworthy websites and direct download links for that. Already installed software should be activated and updated (when that is necessary) by using tools that are provided by its official developers and not some third party, unofficial tools. The aforementioned tools tend to be designed to distribute malware, also, it is not legal to use them for activation of licensed software, or use pirated software. The operating system should be scanned for malware and other threats regularly, it is advisable to scan it with a reputable antivirus or anti-spyware software. If your computer is already infected with malware, we recommend running a scan with Combo Cleaner Antivirus for macOS to automatically eliminate them.

Installer for the Ultra Clear cryptomining malware:

bitcoin miner malware ultra clear malicious installer

Ultra Clear graphical user interface:

bitcoin miner malware ultra clear app

Instant automatic Mac malware removal: Manual threat removal might be a lengthy and complicated process that requires advanced computer skills. Combo Cleaner is a professional automatic malware removal tool that is recommended to get rid of Mac malware. Download it by clicking the button below:
▼ DOWNLOAD Combo Cleaner for Mac By downloading any software listed on this website you agree to our Privacy Policy and Terms of Use. To use full-featured product, you have to purchase a license for Combo Cleaner. Limited three days free trial available.

Quick menu:

Video showing how to remove adware, browser hijackers from a Mac computer:

Potentially unwanted applications removal:

Remove potentially unwanted applications from your "Applications" folder:

mac browser hijacker removal from applications folder

Click the Finder icon. In the Finder window, select "Applications". In the applications folder, look for "MPlayerX", "NicePlayer", or other suspicious applications and drag them to the Trash. After removing the potentially unwanted application(s) that cause online ads, scan your Mac for any remaining unwanted components.

Remove cryptomining malware related files and folders:

Finder go to folder command

Click the Finder icon, from the menu bar. Choose Go, and click Go to Folder...

step1Check for adware-generated files in the /Library/LaunchAgents folder:

removing adware from launch agents folder step 1

In the Go to Folder... bar, type: /Library/LaunchAgents

removing adware from launch agents folder step 2
In the “LaunchAgents” folder, look for any recently-added suspicious files and move them to the Trash. Examples of files generated by adware - “installmac.AppRemoval.plist”, “myppes.download.plist”, “mykotlerino.ltvbit.plist”, “kuklorest.update.plist”, etc. Adware commonly installs several files with the same string.

step2Check for adware generated files in the /Library/Application Support folder:

removing adware from application support folder step 1

In the Go to Folder... bar, type: /Library/Application Support

removing adware from application support folder step 2
In the “Application Support” folder, look for any recently-added suspicious folders. For example, “MplayerX” or “NicePlayer”, and move these folders to the Trash.

step3Check for adware-generated files in the ~/Library/LaunchAgents folder:

removing adware from ~launch agents folder step 1


In the Go to Folder bar, type: ~/Library/LaunchAgents

removing adware from ~launch agents folder step 2

In the “LaunchAgents” folder, look for any recently-added suspicious files and move them to the Trash. Examples of files generated by adware - “installmac.AppRemoval.plist”, “myppes.download.plist”, “mykotlerino.ltvbit.plist”, “kuklorest.update.plist”, etc. Adware commonly installs several files with the same string.

step4Check for adware-generated files in the /Library/LaunchDaemons folder:

removing adware from launch daemons folder step 1
In the Go to Folder... bar, type: /Library/LaunchDaemons

removing adware from launch daemons folder step 2
In the “LaunchDaemons” folder, look for recently-added suspicious files. For example “com.aoudad.net-preferences.plist”, “com.myppes.net-preferences.plist”, "com.kuklorest.net-preferences.plist”, “com.avickUpd.plist”, etc., and move them to the Trash.

step 5 Scan your Mac with Combo Cleaner:

If you have followed all the steps in the correct order you Mac should be clean of infections. To be sure your system is not infected run a scan with Combo Cleaner Antivirus. Download it HERE. After downloading the file double click combocleaner.dmg installer, in the opened window drag and drop Combo Cleaner icon on top of the Applications icon. Now open your launchpad and click on the Combo Cleaner icon. Wait until Combo Cleaner updates it's virus definition database and click "Start Combo Scan" button.

scan-with-combo-cleaner-1

Combo Cleaner will scan your Mac for malware infections. If the antivirus scan displays "no threats found" - this means that you can continue with the removal guide, otherwise it's recommended to remove any found infections before continuing.

scan-with-combo-cleaner-2

After removing files and folders generated by the adware, continue to remove rogue extensions from your Internet browsers.

Cryptomining malware removal from Internet browsers:

safari browser iconRemove malicious extensions from Safari:

Remove cryptomining malware related Safari extensions:

safari browser preferences

Open Safari browser, from the menu bar, select "Safari" and click "Preferences...".

safari extensions window

In the preferences window, select "Extensions" and look for any recently-installed suspicious extensions. When located, click the "Uninstall" button next to it/them. Note that you can safely uninstall all extensions from your Safari browser - none are crucial for normal browser operation.

  • If you continue to have problems with browser redirects and unwanted advertisements - Reset Safari.

firefox browser iconRemove malicious plug-ins from Mozilla Firefox:

Remove cryptomining malware related Mozilla Firefox add-ons:

accessing mozilla firefox add-ons

Open your Mozilla Firefox browser. At the top right corner of the screen, click the "Open Menu" (three horizontal lines) button. From the opened menu, choose "Add-ons".

removing malicious add-ons from mozilla firefox

Choose the "Extensions" tab and look for any recently-installed suspicious add-ons. When located, click the "Remove" button next to it/them. Note that you can safely uninstall all extensions from your Mozilla Firefox browser - none are crucial for normal browser operation.

  • If you continue to have problems with browser redirects and unwanted advertisements - Reset Mozilla Firefox.

chrome-browser-iconRemove malicious extensions from Google Chrome:

Remove cryptomining malware related Google Chrome add-ons:

removing malicious google chrome extensions step 1

Open Google Chrome and click the "Chrome menu" (three horizontal lines) button located in the top-right corner of the browser window. From the drop-down menu, choose "More Tools" and select "Extensions".

removing malicious Google Chrome extensions step 2

In the "Extensions" window, look for any recently-installed suspicious add-ons. When located, click the "Trash" button next to it/them. Note that you can safely uninstall all extensions from your Google Chrome browser - none are crucial for normal browser operation.

  • If you continue to have problems with browser redirects and unwanted advertisements - Reset Google Chrome.

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About the author:

Tomas Meskauskas

Tomas Meskauskas - expert security researcher, professional malware analyst.

I am passionate about computer security and technology. I have an experience of over 10 years working in various companies related to computer technical issue solving and Internet security. I have been working as an author and editor for pcrisk.com since 2010. Follow me on Twitter and LinkedIn to stay informed about the latest online security threats. Contact Tomas Meskauskas.

PCrisk security portal is brought by a company RCS LT. Joined forces of security researchers help educate computer users about the latest online security threats. More information about the company RCS LT.

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Malware activity

Global malware activity level today:

Medium threat activity

Increased attack rate of infections detected within the last 24 hours.

QR Code
Cryptomining malware QR code
A QR code (Quick Response Code) is a machine-readable code which stores URLs and other information. This code can be read using a camera on a smartphone or a tablet. Scan this QR code to have an easy access removal guide of Cryptomining malware on your mobile device.
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