Microsofthost.exe Virus ⛏️ (Coin Miner Trojan) Removal

Written by Robert Bailey
Microsofthost.exe executable file belongs to a malicious program that can accurately be recognized as a coin miner trojan virus. That malware type utilizes your PC components to mine cryptocurrencies, generally – Monero or DarkCoin1. It makes your system roughly nonfunctional as a result of high CPU use.
GridinSoft Anti-Malware Review

It is better to prevent, than repair and repent!

When we talk about the intrusion of unfamiliar programs into your computer’s work, the proverb “Forewarned is forearmed” describes the situation as accurately as possible. Gridinsoft Anti-Malware is exactly the tool that is always useful to have in your armory: fast, efficient, up-to-date. It is appropriate to use it as an emergency help at the slightest suspicion of infection.
GridinSoft Anti-Malware 6-day trial available.
EULA | Privacy Policy | GridinSoft

@topcybersecuritySubscribe to our Telegram channel to be the first to know about news and our exclusive materials on information security.

What is Microsofthost.exe process?

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

As I have mentioned earlier, Microsofthost.exe is a coin miner virus. The names of the .exe file can be diverse, however, the effects are generally the identical. Since coin miners focus on cryptocurrency mining, they use all available hardware capacity of your PC to conduct this procedure. This virus does not pay attention to the fact that you may want to make use of your computer for other tasks – it will continuously consume over 80% of your CPU power.

Microsofthost.exe Windows Process

Microsofthost.exe – Extremely high CPU/GPU usage

Besides CPU usage, some of the coin miners additionally use GPU power for their operations. In that case, you will probably struggle even to see the mouse cursor moving – GPU is usually used on 100%. It is not as critical as processor for system work, so Microsofthost.exe coin miner viruses do not waste time on trifles and use it all. It often can cause bad results.

Shortly about cryptocurrency mining

Cryptocurrency mining is a term that means the action of calculating the transaction block hash. That is a basic element of anything based on the blockchain technology. Since this action takes a lot of calculations, a very strong desktop is required. Exactly, the video card is better for this purpose, because they have more cores available. Cryptomining farms are usually constructed of tens and hundreds of graphic cards to complete their task efficiently. Such systems are not usable for “normal” purposes, like gaming or browsing the Web. Fraudsters 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

  • Extremely bad performance
  • CPU/GPU cooler fan creates a lot of noise
  • High temperature of the device (for laptops)
  • 80-90% consumption of CPU/GPU resources by an unknown process
  • Microsoft Defender is not working
  • How dangerous is the Microsofthost.exe miner?

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

    First off, Microsofthost.exe malware makes your computer overloaded. It is unable to run your applications anymore, because all CPU power is used by a virus. That malware does not care for your necessities, all it pays attention to is generating income on you. Even if you are patient, and you waited until browser is open, you will likely suffer from extremely sluggish performance. Pages will open for years, any kind of logins will likely take about a minute – just a headache for a person who does a job online.

    Microsofthost.exe Technical Summary.

    File NameMicrosofthost.exe
    TypeTrojan Coin Miner
    Detection NameTrojan:Win32/CoinMiner
    Distribution MethodSoftware bundling, Intrusive advertisement, redirects to shady sites etc.
    Similar behaviorUrr.exe, Nheqagent.exe, Ggshka.exe
    RemovalDownload and install GridinSoft Anti-Malware for automatic Microsofthost.exe removal.

    “Visible” harm is not a single bad thing coin miners do to your personal computer. Microsofthost.exe coin miner also deals damage to your OS. To conduct all malevolent operations successfully, it ruins the protection features of your system. You will likely see your Microsoft Defender disabled – malware halts it to prevent detection. If you open the HOSTS file, you will likely see a lot of new notes – they are brought in by this coin miner to connect your PC to a malicious cryptomining network. All these adjustments shall be reverted to the initial state in the process of PC recovery.

    Hardware effects of coin miner activity

    Besides making your PC slow, performing at peak level for long times may cause damage to your device as well as increase electricity expenses. PC elements are created to easily get along with high load, but they can do so only when they are in a good shape.

    Compact and covered CPU cooling system is hard to broke. Meanwhile, GPUs have big and easy-to-access rotors, which can be easily cracked if affected while spinning, for instance, by the user much before the coin-miner injection. Malfunctioning cooling system, together with the really high load caused by Microsofthost.exe miner can easily lead to graphic card failure3. Video cards are also prone to have fast wearing when utilized for crypto mining. It is likely a bad case when your GPU’s performance plunges 20-30% only after several weeks of being used in such a way.

    How did I get Microsofthost.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 one of the most common malicious programs through “severe” viruses. Adware frequently works as a carrier for Microsofthost.exe malware infiltration: it shows you the banners, which have a link to malware downloading. Sure, this abstract “malware” may belong to any kind – yet another adware, spyware, rogue or backdoor. However, the statistics show that around 30% of all viruses spread with the malicious banners are coin miners – and Microsofthost.exe is just with them.4

    Unwanted banners adware

    The example of malicious banners you can see in the Internet

    An additional way you could get this item on your PC is by downloading it from the unreliable site as a part of a program. People that spread hacked variants of well-known programs (which do not need the license key) have small chances to earn money. Thus, there is a very big temptation to include malware to the final package of the hacked application and get a coin for every setup. Before blaming these individuals for hacking and malware spreading, ask yourself – is it okay to avoid buying the program in this manner? It is more affordable to pay $20-$30 one time than to pay a much bigger figure for antivirus software as well as new parts for your PC.

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

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

    Getting rid of such a virus needs making use of special program. Proper security tool must have high performance at scanning and also be lightweight – in order to create no problems with utilization even on weak systems. Furthermore, it is recommended to have proactive protection in your protection tool – to halt the virus even before it starts. Microsoft Defender lacks these functions for various factors. That’s why I’d recommend you to use a third-party anti-malware program for that reason. GridinSoft Anti-Malware is a great option that fits all of the discussed features.5

    Before the malware removal, it is important to reboot your operating system into Safe Mode with Networking. Since Microsofthost.exe miner takes a lot of CPU capacity, it is needed to stop 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 programs, just like the majority of non-crucial operating system components, are not launched with the system start. That allows you to clean the PC without dealing with high CPU usage of the coin miner.

    Remove Microsofthost.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 Microsofthost.exe Virus ⛏️ Trojan Coin Miner

    Name: Microsofthost.exe

    Description: The Microsofthost.exe is a Trojan Coin Miner that uses the infected computer’s sources to mine electronic money without your authorization. This Microsofthost.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

    Sending
    User Review
    4.4 (5 votes)
    Comments Rating 5 (1 review)

    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 GridinSoft Threat Encyclopedia.
    5. Our review on GridinSoft Anti-Malware.

    Spanish Turkish

    About the author

    Robert Bailey

    Security Engineer. Interested in malware, reverse engineering, white ethical hacking. I like coding, travelling and bikes.

    One Response

    1. nick November 16, 2022

    Leave a Reply

    Sending

    This site uses Akismet to reduce spam. Learn how your comment data is processed.