Legosa.exe Virus (Coin Miner Trojan) Removal

Legosa.exe executable file belongs to a harmful application that can correctly be defined as a coin miner trojan. That malware type uses your PC components to mine cryptocurrencies, basically – Monero or DarkCoin¹. It makes your computer roughly unusable because of high CPU utilization.

What is Legosa.exe process?

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

Besides CPU utilization, some of the coin miners additionally use GPU power for their tasks. In that case, you will struggle even to see the mouse arrow moving – GPU is usually used on 100%. It is not as vital as CPU for system work, so Legosa.exe coin miner viruses don’t waste time on trifles and utilize all of it. It sometimes can cause sad consequences.

Shortly about cryptocurrency mining

Crypto mining means the operation of calculating the transaction block hash. That is a basic part of any project based on the blockchain technology. Since this action takes a lot of calculations, a strong PC is needed. Exactly, the graphic card is better for this task, because they have more cores available. Cryptomining farms are usually constructed of dozens of graphic cards to complete their task efficiently. Such computer systems are not usable for “usual” 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.

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 Legosa.exe miner?

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

First, Legosa.exe malware makes your PC overloaded. It is not able to run your applications anymore, because all processor power is consumed by a malware. That malware does not care for your needs, all it focuses on is generating profits on you. Even if you are patient, and you waited until web browser is open, you will likely suffer from incredibly slow performance. Pages will open for years, any sort of logins will likely take about a minute – just a nightmare for a person that does a job online.

Legosa.exe Technical Summary.

“Visible” damage is not a single bad thing coin miners do to your system. Legosa.exe coin miner likewise deals damage to your operating system. To conduct all malevolent functions properly, it ruins the security features of your system. You will likely see your Microsoft Defender disabled – malware stops it to avoid recognition. If you open the HOSTS file, you will likely see a lot of new notes – they are added by this trojan miner to connect your computer to a malicious mining network. All these changes shall be reverted to the initial state in the process of system recovery.

Hardware effects of coin miner activity

Besides slowing down your computer, performing at peak level for long times can trigger damage to your machine and increase power bills. Hardware components are designed to easily deal with high load, but they can do so only when they are in a good shape.

Compact and well-protected processor cooling system is hard to damage. Meanwhile, graphic cards have big and easy-to-access rotors, which can be easily cracked if touched while working, for instance, by the user much earlier before the virus injection. Malfunctioning cooling system, together with the unusually high load caused by Legosa.exe miner can easily lead to GPU failure. Video cards are also prone to have very fast wearing when utilized for cryptocurrency mining. It is likely an undesirable case when your GPU’s performance plunges 20-30% only after several weeks of being used in such a way.

How did I get Legosa.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 widespread malevolent programs through “serious” malware. Adware frequently serves as a carrier for Legosa.exe malware infiltration: it shows you the banners, which include a link to malware downloading. Yes, this abstract “malware” can belong to any type – an additional adware, spyware, rogue or backdoor. But the statistics say that around 30% of all malware spread with the malevolent banners are coin miners – and Legosa.exe is right one of them.

One more 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 favored programs (which do not require the license key) have small chances to make money. For this reason, there is a huge lure to add malware to the final package of the hacked app and acquire a coin for every setup. Prior to blaming these guys for hacking and malware spreading, ask yourself – is it OK to avoid purchasing the program in such a way? It is more affordable to pay $20-$30 at once than to pay a much bigger figure for antivirus program as well as new parts for your computer.

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

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

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.

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.

When your PC is in Safe Mode, all third-party applications, along with the majority of non-critical system components, are not launched with the system start. That gives you the ability to clean the computer without dealing with high CPU usage of the coin miner.

1. Read about why Monero and DarkCoin are so popular amongst cybercriminals.

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