The Threat of Hidden Mining: What is Cryptojacking and How to Protect Yourself

As cryptocurrencies continue to grow, so do the number of cybercrimes related to them. One of the most dangerous forms of cybercrime is cryptojacking (hidden mining), which poses a significant threat to users. In the first half of 2024, the number of attacks of this type increased by 30%, compared to the previous year.

What is Cryptojacking?

Cryptojacking is a malicious process where cybercriminals secretly use your computer, smartphone, or other device without your consent for cryptocurrency mining. This harmful code can be introduced through infected websites, applications, or emails, and it operates without your awareness.

Mining requires significant computational resources, and malicious codes use your device’s power, slowing it down and potentially causing it to overheat.

Main Signs of Cryptojacking:

1. Performance degradation: If your computer or smartphone is noticeably slower without a clear reason, this could be a sign of hidden mining.
2. High CPU usage: Unexpected spikes in CPU activity, even when you’re not running intensive programs, may indicate cryptojacking.
3. Overheating: Since mining scripts consume a lot of energy, your device might overheat more frequently than usual.
4. Fast battery drain: If your device’s battery is depleting faster than normal, it could be due to background mining processes.

How to Protect Yourself from Cryptojacking:

1. Use antivirus software: Regular updates and reliable antivirus software can help detect and remove mining malware.
2. Block scripts in your browser: Installing extensions like NoScript can prevent mining scripts from running on websites.
3. Use mining blockers: Specialized browser extensions such as MinerBlock and uBlock Origin are designed to stop mining scripts from operating.
4. Keep your software updated: Outdated software often contains vulnerabilities that hackers can exploit to insert mining scripts.
5. Monitor CPU usage: Use task managers or specific applications to track your device’s CPU activity. If you notice unusually high usage without a clear reason, it could be a sign of cryptojacking.

Why Has Cryptojacking Become a Profitable Crime?

Cybercriminals make significant profits from cryptojacking without having to invest in mining equipment or pay for electricity. These costs are shifted to unsuspecting users. Research shows that thousands of infected devices are generating millions of dollars in illegal revenue for cybercriminals. What’s worse is that most users don’t even know their devices are being used for mining.

How Widespread is Cryptojacking Globally?

Cryptojacking has become a growing threat worldwide, especially in countries with high rates of digital device usage. Users who frequently visit unverified websites or download apps from unofficial sources are at the highest risk of infection.