In the cryptocurrency world, security is paramount. While most people are aware of the more traditional threats like hacking and phishing, there’s a lesser-known menace that’s been quietly infiltrating the digital landscape: cryptojacking.

In this article, we will dive into the world of cryptojacking, explore its mechanics, and discuss how you can protect yourself against this stealthy threat.


What is Cryptojacking?

Cryptojacking, a portmanteau of “cryptocurrency” and “hijacking,” is a relatively new and stealthy form of cyberattack that has gained prominence in recent years. At its core, cryptojacking involves the unauthorized and covert use of someone else’s computing resources to mine cryptocurrencies.

Unlike traditional cyberattacks that aim to steal data, compromise systems, or extort money, cryptojacking is primarily concerned with siphoning away the computational power of a victim’s device for financial gain.

Cryptojacking can affect individuals, businesses, and even entire networks of devices. It is a versatile threat that can target a wide range of devices, from personal computers and smartphones to servers and Internet of Things (IoT) devices.

Cryptojacking diagram
image credit: ENISA

To better understand cryptojacking, it’s essential to break down its key components:

1. Unauthorized Resource Utilization

The central aspect of cryptojacking revolves around the surreptitious use of a victim’s computer, smartphone, or other connected devices. The attackers, often referred to as “cryptojackers,” gain access to these resources without the knowledge or consent of the device owner.

2. Cryptocurrency Mining

Cryptojacking is intrinsically linked to the process of cryptocurrency mining. Cryptocurrencies, like Bitcoin, Ethereum, and Monero, rely on a decentralized network of computers to validate and record transactions. Miners use their computational power to solve complex cryptographic puzzles, and in return, they are rewarded with cryptocurrency coins. Cryptojackers exploit this process to mine cryptocurrencies without bearing the cost of hardware or electricity.

3. Silent and Covert Operation

What makes cryptojacking particularly insidious is its stealthy nature. The malware responsible for cryptojacking is designed to operate silently in the background, often without any noticeable symptoms for the victim. Unlike ransomware or other malware that announces its presence with ransom notes or overt disruptions, cryptojacking malware aims to remain hidden.

4. Profit-driven Motive

The primary motivation behind cryptojacking is financial gain. Cryptojackers seek to accumulate cryptocurrencies without incurring the expenses associated with legitimate mining operations. These ill-gotten gains are then transferred to the attacker’s cryptocurrency wallet, where they can be converted into real-world currency or used for other purposes.

5. Resource Strain

While cryptojacking may not directly steal personal information or funds, it can have significant adverse effects on the victim’s device. Constantly using CPU and GPU resources for mining can lead to reduced device performance, increased power consumption, and even hardware damage over time.

6. Persistent Operation

Cryptojacking malware is often designed to persist on a victim’s device, even through system reboots or attempts to remove it. This persistence ensures a continuous stream of illicit cryptocurrency mining for the attacker.

Cryptojacking prevention

How to Prevent Cryptojacking

Now that we understand the mechanics of cryptojacking, let’s delve into effective strategies to protect yourself and your devices against this ever-present threat:

1. Use Antivirus and Anti-Malware Software

Invest in reliable antivirus and anti-malware solutions and make it a habit to regularly update and run scans on your devices. These security programs can detect and remove cryptojacking malware, along with other malicious software, safeguarding your system from unauthorized mining.

2. Stay Informed and Practice Vigilance

Vigilance is your first line of defense. Be cautious when downloading files, clicking on links, or opening email attachments, especially if they come from unknown or suspicious sources. Cybercriminals often use these vectors to deliver cryptojacking malware. Staying informed about the latest cybersecurity threats and trends can help you recognize potential risks.

3. Browser Extensions and Plugins

Consider installing browser extensions or plugins explicitly designed to block cryptocurrency mining scripts. Popular options include “NoCoin” and “MinerBlock.” These tools can prevent cryptojacking scripts from running in your browser without your knowledge.

4. Patch and Update Regularly

Keep your operating system, software, and web browsers up to date with the latest security patches and updates. Cybercriminals often exploit vulnerabilities in outdated software to deliver malware, including cryptojacking scripts. Regular updates help protect your system against known security risks.

5. Enhance Network Security

Employ a robust network security solution, such as a firewall or intrusion detection system (IDS), to block access to malicious domains and IP addresses associated with cryptojacking. Network-level protection can thwart cryptojackers before they even reach your devices.

6. Monitor CPU and GPU Usage

Keep an eye on the resource utilization of your devices, especially your computer’s CPU and GPU usage. Unusually high and sustained usage could be a sign of a cryptojacking infection. Task Manager or Activity Monitor can help you identify resource-hungry processes. Investigate any anomalies promptly.

7. Educate Yourself and Others

Knowledge is a powerful tool in the fight against cryptojacking. Take the time to educate yourself about the risks of cryptojacking and the evolving tactics used by cybercriminals. Additionally, share this knowledge with your employees, family members, or anyone who uses the same network to ensure that everyone practices safe online habits.

8. Implement Ad-Blockers

Some cryptojacking scripts are delivered through malicious advertisements (malvertisements) on websites. To mitigate this risk, consider using ad-blocker browser extensions. These extensions can help prevent the display of malicious ads that may contain cryptojacking scripts.

9. Consider Endpoint Security Solutions

In addition to traditional antivirus software, consider endpoint security solutions that offer advanced threat detection and prevention capabilities. These solutions often include behavior-based analysis to identify and stop cryptojacking attempts.

Cryptojacking protection


Cryptojacking is a growing threat in the world of cryptocurrencies. By understanding how it works and taking preventive measures, you can protect your computing resources and maintain control over your devices. Stay vigilant, keep your software updated, and make informed choices to safeguard your digital assets from this stealthy menace.

Remember, in the ever-evolving landscape of cybersecurity, knowledge is your most potent weapon against cryptojacking and other threats. Stay informed, stay secure.

About The Author


Owner of Since 2013, he's been immersed in the world of cryptocurrencies and has become an avid NFT collector since 2019. Also an NFT artist, he is a lifelong learner of mixed-media artwork creation.