Hhjk.exe Virus ⛏️ (Coin Miner Trojan) Removal

Written by Robert Bailey
Hhjk.exe executable file belongs to a malevolent application that can correctly be defined as a coin miner virus. That malware type utilizes your hardware to mine cryptocurrencies, generally – Monero or DarkCoin1. It makes your personal computer roughly unfunctional as a result of high CPU use.
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What is Hhjk.exe process?

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

As I have actually pointed out previously, Hhjk.exe is a coin miner virus. The names of the executive file can be diverse, however, the impacts are almost always the same. Because coin miners focus on cryptocurrency mining, they utilize all available hardware power of your personal computer to run this procedure. This virus does not pay attention to the fact that you may want to make use of your desktop for other activities – it will always use over 80% of your processor power.

Hhjk.exe Windows Process

Hhjk.exe – Really high CPU and GPU use

Besides CPU consumption, some of the coin miners also utilize GPU power for their tasks. In that situation, you will probably struggle even to see the mouse arrow moving – GPU is usually used on 100%. It is not as crucial as CPU for system work, so Hhjk.exe coin miner viruses do not waste time on trifles and use all of it. It often may result in bad consequences.

Shortly about cryptocurrency mining

Cryptocurrency mining means the action of calculating the transaction block hash. That is a basic element of any project based on the blockchain technology. Since this action takes a lot of calculations, a strong computer is needed. Exactly, the graphic card is better for this purpose, because they have more cores available. Cryptomining farms usually consist of dozens of GPUs to conduct their activity effectively. Such systems are not usable for “general” purposes, like gaming or web browsing. 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

  • Microsoft Defender is stopped;
  • CPU and GPU is loaded at 80-90% exactly after the system start
  • Cooling fans are running at high speed and create a lot of noise
  • A single process in Task Manager consumes all CPU and GPU power
  • How dangerous is the Hhjk.exe miner?

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

    Initially, Hhjk.exe malware makes your computer overloaded. It is not able to run your applications now, as all processor power is used by a malware. That malware does not care for your needs, 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 suffer from exceptionally sluggish efficiency. Pages will open up for years, any kind of logins will likely take about a minute – just a horror story for a person that works online.

    Hhjk.exe Technical Summary.

    File NameHhjk.exe
    TypeTrojan Coin Miner
    Detection NameTrojan:Win32/CoinMiner
    Distribution MethodSoftware bundling, Intrusive advertisement, redirects to shady sites etc.
    Similar behaviorRaven.qt, Eo.core, Services32.ns
    RemovalDownload and install GridinSoft Anti-Malware for automatic Hhjk.exe removal.

    “Visible” harm is not a single negative thing coin miners perform to your PC. Hhjk.exe coin miner likewise deals damage to your OS. To conduct all malevolent functions 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 check the HOSTS file, you will likely see a number of new notes – they are brought in by this trojan miner to connect your computer to a malicious mining network. All these adjustments shall be gone back to the initial state in the process of PC recovery.

    Hardware effects of coin miner activity

    Besides slowing down your computer, running at peak power for long times may cause damage to your device and increase electricity costs. PC components are designed to easily deal with high load, but they are good with it only when they are in a good shape.

    Compact and covered processor cooling system is quite hard to damage. Meanwhile, graphic cards have large and easy-to-access fans, which can be easily cracked if affected while spinning, for example, by the user much before the malware injection. Malfunctioning cooling system, together with the very high load caused by Hhjk.exe malware can easily lead to graphic processing unit failure3. Video cards are also tend to have very fast wearing when utilized for crypto mining. It is likely a bad situation when the performance of your graphic card decreases on 20-30% only after several weeks of being used in such a way.

    How did I get Hhjk.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 common malicious programs among “major” malware. Adware often acts as a carrier for Hhjk.exe malware injection: it shows you the banners, which contain 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 approximately 30% of all malware spread with the malicious banners are coin miners – and Hhjk.exe is right one of 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 PC is by downloading it from the dubious web page as a part of a program. Users who spread hacked variants of favored programs (which do not need the license key) have small chances to earn money. Thus, there is a very big lure to include malware to the final package of the hacked application and get a coin for every setup. Before criticizing these individuals for hacking and malware distribution, ask yourself – is it okay to avoid buying the program in such a way? It is more affordable to pay $20-$30 one time than to pay a much bigger figure for antivirus program as well as new parts for your PC.

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

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

    Eliminating such a virus requires making use of specific app. Proper security tool must have high capability at scanning and be lightweight – in order to make no problems with utilization even on weak systems. Additionally, it is better to have on-run protection in your protection tool – to halt the virus even before it starts. Microsoft Defender does not have these functions for various reasons. That’s why I’d advise you to use a third-party anti-malware program for that reason. GridinSoft Anti-Malware is a great choice that fits all of the discussed features.5

    Prior to the virus removal, it is important to boot your system into Safe Mode with Networking. Since Hhjk.exe miner takes a lot of processor 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 applications, just like the majority of non-critical operating system components, are not started with the system start. That allows you to clean the computer without dealing with high processor usage of the coin miner.

    Remove Hhjk.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 Hhjk.exe Virus ⛏️ Trojan Coin Miner

    Name: Hhjk.exe

    Description: The Hhjk.exe is a Trojan Coin Miner that uses the infected computer’s sources to mine electronic money without your authorization. This Hhjk.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 GridinSoft Threat Encyclopedia.
    5. Our review on GridinSoft Anti-Malware.

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    About the author

    Robert Bailey

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

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