What is Cryptojacking? How to Prevent and Recover?

Cryptojacking is an unauthorized use where someone else’s computer is yours. Hackers mainly do this by making the victim click on a malicious link and then send an email that gets loaded as a crypto mining code in the computer. Sometimes they infected the website with JavaScript code making the website auto-executes after it gets loaded to the victim’s browser.

Anyways cryptomining code works in the background where unsuspecting victims are using their computers normally. The only symptom which you can get is your system will become slow are performance.

Table of Contents:

How Cryptojacking occurs:
How to Detect Cryptojacking?
How to Prevent Cryptojacking Malware?
How to Detect and Recover Cryptojacking?


1.What is cryptojacking and how do you prevent it?

Cryptojacking occurs when an attacker uses a victim’s computer to mine Bitcoin without their authorization. This can severely delay gadgets, raise electricity expenses, and shorten their longevity.

Cryptojacking may be prevented using comprehensive security software that blocks cryptojacking. Security vulnerabilities can be fixed by updating your OS, browsers, and apps.

Browser ad-blockers and anti-crypto mining plugins can also stop dangerous scripts. Avoid phishing by not clicking on links or downloading attachments from unfamiliar sources.

Monitoring your device’s performance for unexpected slowdowns can also detect unlawful mining. Defenses include educating yourself and your network about cryptojacking risks and indications.

2.How do you protect crypto mining?

Crypto mining companies need multilayered security to avoid theft, unwanted access, and cyberattacks. Mining equipment should be stored in secure, access-controlled facilities.

Protect against malware and hacking via firewalls, antivirus, and intrusion detection systems. All mining accounts should have strong, unique passwords and 2FA whenever possible.

Mining software and OS should be updated often to fix vulnerabilities. Use a VPN to hide your IP address and encrypt data.

Also, frequently backup your wallet and other data in secure locations. Keep up with crypto mining security threats and recommended practices to strengthen your defenses.

3.What are the problems with cryptojacking?

Cryptojacking causes several issues for individuals and businesses. It mostly uses the victim’s computational resources without permission, reducing performance and wear and tear.

Unauthorized mining can slow down, shorten hardware lifespan, and increase electricity use, raising costs. Cryptojacking malware can undermine system integrity and data security for enterprises, as it implies a breach that could be exploited.

It can also cause network congestion, limiting corporate productivity. Cryptojacking remains undetected for lengthy durations due to its stealthiness.

This strains resources and provides a constant security risk since attackers may upgrade malware or deploy new threats once in the system.

How Cryptojacking occurs:

  • Malicious applications: Usually, hackers trick the victim into loading crypto mining into your computers through phishing tactics. After that, victims will receive a legitimate email, which will encourage them to click on the link and install the crypto mining software, and it will start running in the background.
  • Malicious Websites (Drive-by cryptojacking): The victim has to visit the site where malicious activities run or else you can also host the negative advertisement. This type of script can do one or two things such as;
  1. When a website is open, users can work actively for cryptocurrency, and make a “Drive-by” attack where they need to compromise with the web browser.
  2. The website can use the script anytime, and they can also install the malicious application without your knowledge.
  1. GitHub: It is a web-based platform that helps to collaborate the software development. Few hackers can take the code that is shared and hide the crypto-jacking malware within the project.
Cryptojacking Methods (Image Credits: Varonis )

How to Detect Cryptojacking?

If you do the immediate and blatant aggression, then cryptojackers will gradually wear down the performance to understand the problem and solve it.

  1. Download a good antivirus program: You need to have good antivirus software and if you do not have it, you need to do so as soon as possible. Cryptojacking increasing, so you can not imagine who will become the victim. A good antivirus program will help you by warning you of the presence of malware and giving you the option to test the threats. After the test, if it’s found malware then it is best that immediately you protect your computer.
  2. Monitor system performance: Cryptomining always declines the system’s performance so you need to lag soon. As soon as the script eats away from the system, so many fats, the degradation becomes. It will start with lagging then you will not be able to open your program without crashing. You can check your CPU usage, and if it has increased, then it is a chronic problem.
  3. Check for Overheating: If you use more CPU, then the device will heat up. If it’s getting hot suddenly, then it will get infected. When the computer gets overheated to work on a certain website, malware scripts are available. Due to overheating, the battery can get damaged and the battery life will get short.
  4. Perform Regular Antivirus Scan: Cryptojacking makes the entrance, and they do not give the time and start lagging. Though issues are fixed, you have to waste time to get the tough lag. When you do the regular scan that time, you can compare it with the database script on your device. If it detects, you need to get rid of it.
Cryptojacking Detection (Image Credits:Varonis )

How to Prevent Cryptojacking Malware?

You can follow a few tips where you do need to think for any recovery from crypto-mining malware. Down we have discussed malware prevention. Those are below:

  1. As a business owner, if you need to keep your business safe, you need to keep all the software up-to-date with the latest patches and other fixes. You will get many attacks to exploit which are related to vulnerabilities in the existing software.
  2. You need to make sure that you install the trusted sources.
  3. It is better that you avoid suspicious websites and do not accept those websites because they are hosted with malicious scripts.
  4. You need to check the email carefully. For emails that are in the spam folder, it is better to avoid that. If you feel that phishing emails are available, you should not open them. A few emails are from unfamiliar receipts that time it is better that you do not open them.
  5. Employees also need to avoid unnatural and shortened links so that they do not become victims. You can see the shortened link in the place where it is not necessary.
  6. You do need to be paranoid about the anchor text, and you also need to be aware of the phenomenon.
  7. Cryptojacking uses JavaScript, where it is better to make that disabled to make yourself safe.
  8. To do good business, it is always better to provide training for the new hires or arrange a refresher workshop.
Cryptojacking Prevention (Image Credits:Varonis )

How to Detect and Recover Cryptojacking?

  1. Cryptojacking has symptoms, which include an unexpectedly high processor (this can indicate a sluggish or slow response time),  which overheats the device and makes your battery performance low.
  2. If you start feeling that you have become the victim, you close all the browser windows and exit from there. You can remove all browser extensions and put in an antivirus for the scan.

In this era, browser-based cryptojacking is growing fast, and it proves that hackers are constantly evolving their techniques. It finally reminds us that we have to stay safe and secure with constant vigilance.

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Divya is a Senior Journalist at Cyber Security news covering Cyber Attacks, Threats, Breaches, Vulnerabilities and other happenings in the cyber world.

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