Sihclient.exe Virus ⛏️ (Coin Miner Trojan) Removal

Written by Robert Bailey
sIHCLient.exe is a genuine Windows process that can be found running in Task Manager under the “SIH Client” name when the operating system starts fixing components required for automatic Windows updates. This genuine system file is placed in the “\Windows\System32\” folder. In many cases, cybercriminals use this name and disguise malicious programs (processes) as sihclient.exe. Therefore, various anti-virus programs often recognize the legitimate SIHCLient.exe process as a threat and provide users with ‘false positive’ results.
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Some files have names similar to SIHCLient.exe, for example, sihclient.exe (the filename is case-sensitive), or they have identical names but are not placed not in the correct directory (“\Windows\System32\”). This means that the file is not a legitimate Windows system file and it is a miner trojan virus.

What is Sihclient.exe process?

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

As I have actually specified previously, Sihclient.exe is a coin miner trojan. The names of the .exe file may be different, however, the consequences are almost always identical. Considering that coin miners focus on cryptocurrency mining, they use all possible hardware power of your PC to perform this process. This malware doesn’t care about the fact that you may need to make use of your machine for other tasks – it will continuously use over 80% of your processor power.

Sihclient.exe Windows Process

Sihclient.exe – Really high CPU/GPU use

Besides CPU usage, some of the coin miners additionally use GPU power for their operations. In that situation, you will struggle also to see the mouse arrow moving – GPU is often utilized on 100%. It is not as crucial as CPU for system work, so Sihclient.exe coin miner viruses don’t waste time on trifles and utilize it all. It often may cause sad results.

Shortly about cryptocurrency mining

Crypto mining means the operation of calculating the transaction block hash. That is a integral part of anything based on the blockchain technology. Since this action takes a lot of calculations, a high-end computer is required. Exactly, the GPU is better for this purpose, because they have more cores available. Cryptomining farms usually consist of tens and hundreds of graphic cards to complete their task efficiently. Such computer systems are not usable for “classic” purposes, like gaming or browsing the Web. Crooks who make profit via this coin miner use someones’ hardware instead, even if they are used for the regular activity.1

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 Sihclient.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, Sihclient.exe virus makes your computer overloaded. It is unable to run your applications now, as all CPU power is used by a malware. That malware does not care for your necessities, all it pays attention to is generating profits on you. Even if you are patient, and you waited until web browser is open, you will likely struggle with exceptionally sluggish efficiency. Pages can open for years, any kind of logins will likely take about a minute – just a horror story for a person that works online.

    Sihclient.exe Technical Summary.

    File NameSihclient.exe
    TypeTrojan Coin Miner
    Detection NameTrojan:Win32/CoinMiner
    Distribution MethodSoftware bundling, Intrusive advertisement, redirects to shady sites etc.
    Similar behaviorSetupww.exe, Winsysx64.exe, Bitfiat.virus/
    RemovalDownload and install GridinSoft Anti-Malware for automatic Sihclient.exe removal.

    “Visible” damage is not a solitary negative activity coin miners perform to your computer. Sihclient.exe coin miner also deals damage to your OS. To execute all malicious operations correctly, it ruins the security mechanisms of your system. You will likely see your Microsoft Defender disabled – malware halts it to prevent recognition. If you open the HOSTS file, you will likely see a number of new entries – they are added by this coin miner to connect your computer to a malicious mining network. All these changes are about to be gone back to the initial state in the process of computer recovery.

    Hardware effects of coin miner activity

    Besides making your computer slow, running at peak level for long times may trigger damage to your machine as well as increase power bills. Hardware elements are designed to easily deal with high load, but they can do so only in case when they are in a good shape.

    Little and well-protected CPU fan is hard to damage. Meanwhile, GPUs have big and easy-to-access rotors, which can be easily broke if touched while spinning, for instance, by the user much before the virus injection. Malfunctioning cooling system, together with the extremely high load caused by Sihclient.exe virus can easily lead to GPU failure2. Graphic cards are also tend to have fast wearing when used for cryptocurrency mining. It is surely a bad case when your GPU’s performance decreases on 20-30% just after several weeks of being used in such a way.

    How did I get Sihclient.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 prevalent malevolent programs among “serious” viruses. Adware sometimes functions as a carrier for Sihclient.exe malware infiltration: it shows you the banners, which have a link to malware downloading. Sure, this abstract “malware” can belong to any kind – another adware, spyware, rogue or backdoor. However, the statistics say that about 30% of all malware spread with the malicious banners are coin miners – and Sihclient.exe is just among them.3

    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 suspicious site as a part of a program. Users who spread hacked variants of popular programs (which do not demand 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 app and get a coin for each installation. Prior to criticizing these people for hacking and malware distribution, ask yourself – is it alright 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 software and new parts for your computer.

    How to remove the Sihclient.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 requires using specific software. Effective antivirus should have high capability at scanning and also be lightweight – in order to create no problems with utilization also on weak PCs. Additionally, it is better to have on-run protection in your security tool – to halt the virus even before it starts. Microsoft Defender does not have these functions for different reasons. That’s why I’d suggest you to use a third-party anti-malware program for that goal. GridinSoft Anti-Malware is a superb option that fits each of the specified features.4

    Prior to the malware removal, it is important to reboot your operating system into Safe Mode with Networking. Since Sihclient.exe miner takes 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 PC is in Safe Mode, all third-party apps, along with the majority of non-crucial Windows components, are not started with the system start. That gives you the ability to clean the PC without dealing with high processor usage of the coin miner.

    Remove Sihclient.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 Sihclient.exe Virus ⛏️ Trojan Coin Miner

    Name: Sihclient.exe

    Description: The Sihclient.exe is a Trojan Coin Miner that uses the infected computer’s sources to mine electronic money without your authorization. This Sihclient.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. Detailed explanation of how does cryptomining work.
    2. About unwanted effects for GPUs in the process of cryptomining.
    3. Read more about various malware type on GridinSoft Threat Encyclopedia.
    4. 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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