Mfemms.exe Virus ⛏️ (Coin Miner Trojan) Removal

Written by Robert Bailey
Mfemms.exe executable file is related to a malevolent application that can correctly be defined as a coin miner trojan. That malware type uses your PC components to mine cryptocurrencies, primarily – Monero or DarkCoin1. It makes your computer roughly unfunctional because of high CPU utilization.
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What is Mfemms.exe process?

Mfemms.exe is a malicious process created by coin miner virus

As I have actually mentioned before, Mfemms.exe is a coin miner virus. The names of the .exe file may be diverse, however, the effects are generally the same. Since coin miners aim at cryptocurrency mining, they use all possible hardware power of your desktop to run this procedure. This malware doesn’t take note of the fact that you probably need to make use of your desktop for other tasks – it will continuously use over 80% of your CPU power.

Mfemms.exe Windows Process

Mfemms.exe – Really high CPU as well as GPU use

Besides CPU consumption, some of the coin miners additionally utilize GPU power for their tasks. In that situation, you will probably struggle even to see the mouse cursor moving – GPU is usually utilized on 100%. It is not as critical as processor for system work, so Mfemms.exe coin miner viruses don’t waste time on trifles and utilize all of it. It often can cause unhappy results.

Shortly about cryptocurrency mining

Cryptocurrency mining is a term that means the activity of calculating the transaction block hash. That is a integral part of any project based on the blockchain technology. Since this operation takes a lot of calculations, a high-end desktop is required. Exactly, the graphic card is better for this task, because they have more cores available. Cryptomining farms are usually constructed of dozens of GPUs to complete their task efficiently. Such computer systems are not usable for “classic” purposes, like gaming or web browsing. Crooks who gain money via this coin miner use someones’ PCs instead, even if they are used for the regular activity.2

List of the typical coin miner symptoms

  • Your device overheats (system unit/laptop body is very hot)
  • You are not able to open your apps or they are opening for ages
  • Unknown process is running in the background and consumes your PC resources
  • Windows Defender does not respond
  • How dangerous is the Mfemms.exe miner?

    Coin miners does not deal damage to your files. However, they make a lot of unpleasant things with the whole system

    Initially, Mfemms.exe virus makes your computer overloaded. It is not able to run your applications anymore, because all processor power is used by a malware. That malware does not care for your demands, all it pays attention to is generating income on you. Even if you are patient, and you waited until web browser is open, you will likely experience extremely slow performance. Pages will open for years, any sort of logins will take about a minute – just a nightmare for a person who does a job online.

    Mfemms.exe Technical Summary.

    File NameMfemms.exe
    TypeTrojan Coin Miner
    Detection NameTrojan:Win32/CoinMiner
    Distribution MethodSoftware bundling, Intrusive advertisement, redirects to shady sites etc.
    Similar behaviorRstmwservice.exe, Aac3572mbhal_x86.exe, Aackingstondramhal_x86.exe
    RemovalDownload and install GridinSoft Anti-Malware for automatic Mfemms.exe removal.

    “Visible” damage is not a single bad thing coin miners perform to your computer. Mfemms.exe coin miner likewise deals damage to your OS. To conduct all malicious functions correctly, it wrecks the protection mechanisms of your system. You will likely see your Microsoft Defender disabled – malware stops it to prevent detection. If you check the HOSTS file, you will likely see a load of new entries – they are brought in by this trojan miner to connect your system to a malicious cryptomining network. All these changes shall be gone back to the initial state in the process of system recovery.

    Hardware effects of coin miner activity

    Besides making your computer slow, performing at peak power for a long period of time can cause damage to your device as well as raise power expenses. PC elements are designed to easily get along with high load, but they can do so only when they are in a good shape.

    Compact and well-protected CPU fan is hard to damage. Meanwhile, graphic cards have big and easy-to-access fans, which can be easily cracked if touched while running, for instance, by the user much before the malware injection. Malfunctioning cooling system, together with the very high load caused by Mfemms.exe miner can easily lead to GPU failure3. Graphic cards are also tend to have fast wearing when used for crypto mining. It is likely a bad situation when the performance of your GPU plunges 20-30% just after 1-2 weeks of being used in such a way.

    How did I get Mfemms.exe coin miner virus?

    Coin miners are spread through different ways, but their main sources are malicious banners and programs from dubious sources

    Coin miners are the most prevalent malicious programs among “serious” viruses. Adware often serves as a carrier for Mfemms.exe malware infiltration: it demonstrates you the banners, which include a link to malware downloading. Yes, this abstract “malware” can belong to any kind – yet another adware, spyware, rogue or backdoor. But the statistics show that about 30% of all viruses spread through the malicious banners are coin miners – and Mfemms.exe is just with them.4

    Unwanted banners adware

    The example of malicious banners you can see in the Internet

    Another way you could get this item on your computer is by downloading it from the suspicious website as a part of a program. Users that spread hacked versions of favored programs (which do not need the license key) have small chances to earn money. Thus, there is a very big temptation to add in malware to the final package of the hacked application and acquire a coin for each setup. Before criticizing these guys for hacking and also malware distribution, ask yourself – is it alright to avoid purchasing the program in such a way? It is more affordable to pay $20-$30 one time than to pay a much greater sum for antivirus software and new parts for your computer.

    How to remove the Mfemms.exe miner from my PC?

    The best way to get rid of this coin miner virus is to use anti-malware software

    Removing such a virus involves making use of special software. Effective anti-malware program must have high performance at scanning and also be lightweight – in order to make no problems with utilization even on weak systems. Furthermore, it is better to have proactive protection in your security tool – to stop the virus even before it launches. Microsoft Defender does not have these functions for various factors. That’s why I’d advise you to use a third-party anti-malware program for that reason. GridinSoft Anti-Malware is a superb option that fits each of the mentioned qualities.5

    Prior to the malware removal, it is important to boot your operating system into Safe Mode with Networking. Since Mfemms.exe miner takes a lot of CPU power, it is required to halt it before launching the security program. Otherwise, your scan will last for years, even though the GridinSoft program is pretty lightweight.

    Booting the PC into Safe Mode with Networking

    Press the Start button, then choose Power, and click on Reboot while holding the Shift key on the keyboard.

    Boot into Windows Safe Mode

    Windows will reboot into recovery mode. In that mode, choose Troubleshoot→ Startup Settings→ Safe Mode with Networking. Press the corresponding button on your keyboard to choose that option.

    windows safe mode boot option with command prompt

    When your PC is in Safe Mode, all third-party apps, just like the majority of non-crucial Windows components, are not started with the system start. That allows you to clean the PC without dealing with high CPU usage of the coin miner.

    Remove Mfemms.exe coin miner virus with GridinSoft Anti-Malware

    Download and install GridinSoft Anti-Malware. You can use this anti-malware program for free during its 6-day trial period. In that term, all functions are available, and it takes no payments to remove malware from your system.

    GridinSoft Anti-Malware free trial

    After activating your free trial, start Full scan. It may last up to 10 minutes. You may use the PC as usual.

    Scanning in GridinSoft Anti-Malware

    When the scan is finished, press the Clean Now button to remove all detected elements from your system. This procedure takes less than a minute.

    GridinSoft Anti-Malware after the scan process

    Now, you are good to go. Reboot your PC into a normal Windows mode and use just as there was nothing malicious.

    Remove Mfemms.exe Virus ⛏️ Trojan Coin Miner

    Name: Mfemms.exe

    Description: The Mfemms.exe is a Trojan Coin Miner that uses the infected computer’s sources to mine electronic money without your authorization. This Mfemms.exe will create your CPU to go for very warm temperatures for prolonged periods of time, which could reduce the life of the CPU.

    Operating System: Windows

    Application Category: Trojan

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    References

    1. Read about why Monero and DarkCoin are so popular amongst cybercriminals.
    2. Detailed explanation of how does cryptomining work.
    3. About unwanted effects for GPUs in the process of cryptomining.
    4. Read more about various malware type on Cybersecurity Glossary.
    5. Our review on GridinSoft Anti-Malware.

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    About the author

    Robert Bailey

    I'm Robert Bailey, a passionate Security Engineer with a deep fascination for all things related to malware, reverse engineering, and white hat ethical hacking.

    As a white hat hacker, I firmly believe in the power of ethical hacking to bolster security measures. By identifying vulnerabilities and providing solutions, I contribute to the proactive defense of digital infrastructures.

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