Cryptojacking

Cryptojacking is an unauthorized use where someone else’s computer is yours. Hackers mainly do this by making the victim click into a malicious link and they send an email that gets load as a cryptomining 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.

How Cryptojacking occurs:

  • Malicious applications: Usually, hackers trick the victim to load 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): 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 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 which is shared and hide the cryptojacking 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 of the presence of malware and giving the option to do the test of 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 lagging 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 will get overheated to work on a certain website, malware scripts are available. Due to overheating, the battery can get damaged that time battery life will get short.
  4. Perform Regular Antivirus Scan: Cryptojacking makes the entrance, and they do not give the time and start the lagging. Though issues are fixed, you have to waste the time to get the tough lag. When you do the regular scan that time, you can compare it with database scrip on your device. If it detects, you need to get rid of it.
Cryptojacking
Cryptojacking Detection (Image Credits:Varonis )

How to Prevent Cryptojacking Malware?

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

EHA
  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 with the exiting 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 those are the host with malicious scripts.
  4. You need to check the email carefully. 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. Few emails are from the unfamiliar receipt that time it is better that you do not open.
  5. Employees also need to avoid unnatural and shortened link so that you do not become a victim. You can see the shortened link in the place where it is not necessary.
  6. You no 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
Cryptojacking Prevention (Image Credits:Varonis )

How to Detect and Recover Cryptojacking?

  1. Cryptojacking has symptoms, which include an unexpected high processor which (this can indicate the sluggish or slow response time),  which overheat the device and make 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 to antivirus for the scan.

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

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Gurubaran is a Security Consultant, Security Editor & Co-Founder of Cyber Security News & GBHackers On Security.