Unohostclr.exe Virus ⛏️ (Coin Miner Trojan) Removal

Written by Robert Bailey
Unohostclr.exe executable file belongs to a malicious program that can correctly be identified as a coin miner virus. That malware form uses your PC components to mine cryptocurrencies, primarily – Monero or DarkCoin1. It makes your computer pretty much nonfunctional as a result of high CPU use.
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What is Unohostclr.exe process?

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

As I have pointed out previously, Unohostclr.exe is a coin miner virus. The names of the executive file may be different, however, the consequences are almost always the identical. Since coin miners focus on cryptocurrency mining, they use all available hardware power of your PC to conduct this process. This malware doesn’t pay attention to the fact that you probably want to use your computer for other tasks – it will always use over 80% of your CPU power.

Unohostclr.exe Windows Process

Unohostclr.exe – Really high CPU as well as GPU usage

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

Shortly about cryptocurrency mining

Cryptocurrency mining is a term that means the action of calculating the transaction block hash. That is a integral element of any project based on the blockchain technology. Since this operation takes a lot of calculations, a high-end computer is required. Exactly, the GPU is better for this task, because they have more cores available. Cryptomining farms usually consist of tens and hundreds of GPUs to conduct their activity effectively. Such computer systems are not usable for “general” purposes, like gaming or browsing the Web. Fraudsters who make profit 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 Unohostclr.exe miner?

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

    First, Unohostclr.exe malware makes your system overloaded. It is unable to run your applications anymore, as all processor power is consumed by a malware. That malware does not care for your wants, all it focuses on is generating profits on you. Even if you are patient, and you waited until browser is open, you will likely experience incredibly sluggish performance. Pages can open for years, any sort of logins will take about a minute – just a nightmare for a person who does a job online.

    Unohostclr.exe Technical Summary.

    File NameUnohostclr.exe
    TypeTrojan Coin Miner
    Detection NameTrojan:Win32/CoinMiner
    Distribution MethodSoftware bundling, Intrusive advertisement, redirects to shady sites etc.
    Similar behaviorJg6_6asg.exe, Menu.exe, Twain_32.exe
    RemovalDownload and install GridinSoft Anti-Malware for automatic Unohostclr.exe removal.

    “Visible” harm is not a single bad thing coin miners perform to your PC. Unohostclr.exe coin miner likewise deals damage to your operating system. To conduct all malevolent functions successfully, it ruins the protection mechanisms of your system. You will likely see your Microsoft Defender disabled – malware halts it to avoid recognition. If you open the HOSTS file, you will likely see a ton of new entries – they are brought in by this trojan miner to connect your system to a malicious cryptomining network. All these adjustments are about to be thrown back to the initial state in the process of system recovery.

    Hardware effects of coin miner activity

    Besides making your computer slow, running at peak power for a long period of time may trigger damage to your device and raise electricity bills. PC elements are designed to easily deal with high load, but they can do so only in case when they are in a good shape.

    Tiny and covered CPU cooling system is quite hard to broke. Meanwhile, GPUs have large and easy-to-access fans, which can be easily cracked if touched while running, for example, by the user much before the malware injection. Malfunctioning cooling system, together with the unusually high load caused by Unohostclr.exe virus can easily lead to GPU failure3. GPUs are also tend to have very fast wearing when used for cryptocurrency mining. It is likely an undesirable case when your GPU’s performance decreases on 20-30% only after several weeks of being used in such a way.

    How did I get Unohostclr.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 among “severe” viruses. Adware frequently serves as a carrier for Unohostclr.exe malware infiltration: it demonstrates you the banners, which have a link to malware downloading. Sure, this abstract “malware” can belong to any kind – yet another adware, spyware, rogue or backdoor. However, the statistics say that about 30% of all malware spread through the malicious banners are coin miners – and Unohostclr.exe is just one of them.4

    Unwanted banners adware

    The example of malicious banners you can see in the Internet

    An additional way you could get this thing on your PC is by downloading it from the untrustworthy website as a part of a program. Users that spread hacked versions of well-known programs (which do not need the license key) have small chances to get paid. Therefore, there is a very big temptation to add malware to the final package of the hacked app and get a coin for every setup. Prior to blaming these guys for hacking and malware spreading, ask yourself – is it OK to avoid buying the program in this manner? It is much cheaper to pay $20-$30 at once than to pay a much greater sum for antivirus program and new parts for your desktop.

    How to remove the Unohostclr.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 needs using special tool. Appropriate anti-malware program should have high performance at scanning and be lightweight – in order to create no problems with utilization also on weak PCs. Additionally, it is better to have on-run security in your protection solution – to halt the virus even before it launches. Microsoft Defender lacks these features for various factors. That’s why I’d recommend you to use a third-party anti-malware program for that goal. GridinSoft Anti-Malware is an ideal option that fits all of the specified features.5

    Prior to the malware removal, it is important to reboot your operating system into Safe Mode with Networking. Since Unohostclr.exe miner consumes a lot of CPU power, it is needed 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 computer is in Safe Mode, all third-party apps, along with the majority of non-crucial operating system components, are not launched with the system start. That gives you the ability to clean the system without dealing with high processor usage of the coin miner.

    Remove Unohostclr.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 Unohostclr.exe Virus ⛏️ Trojan Coin Miner

    Name: Unohostclr.exe

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