As cryptocurrency continues to gain momentum, a hidden cyber threat is also on the rise—cryptojacking. Researchers have discovered thousands of websites that embed in-browser mining scripts. When users visit these sites, their CPUs mine cryptocurrency for others without their knowledge.

What Is Cryptojacking?

Cryptojacking happens when others covertly exploit your computer, smartphone, or server to mine cryptocurrency without your awareness. This often occurs through mining trojans, malicious advertisements, or website scripts.

Latest Trends

Stealth mining via browser scripts is now the most prevalent technique. You don’t need to install any software. Simply opening a web page can cause your CPU to be hijacked in the background for mining.

How to Tell If Your Device Is Cryptojacked

• Abnormal CPU or GPU utilization: Hardware remains at high usage even when resource-intensive applications are not running.
• Fans running at high speed / Device overheating:
  Hardware experiences sustained high load.
• Rapid battery drain / Higher electricity bills: Power consumption increases sharply, even though your usage patterns haven’t changed.
• System lag, delays, or frequent crashes: Even simple tasks cause stuttering or system freezes.
• Unusual network activity: You notice high network traffic or unexplained connections while idle.
• Unknown background processes: Unrecognized system processes are running.
• CPU spikes triggered by specific web pages: CPU usage surges suddenly when you visit certain websites.

Detection Tools & Methods

• Check resource consumption using Task Manager or Performance Monitor.
• Inspect network connections for suspicious external links.
• Run security software scans to detect mining trojans.
• Install browser extensions to block mining scripts.

What Should You Do If You’re Cryptojacked?

• Disconnect from the internet and terminate suspicious processes immediately.
• Use antivirus solutions to remove malware or trojans.
• Update your operating system and software to patch security vulnerabilities.
• Change weak passwords and strengthen access controls.

Prevention Tips

• Don’t download unknown files or software.
• Use ad blockers while browsing.
• Keep your operating system and browser up to date.
• Run regular comprehensive scans with security software.

Cryptojacking is highly covert, but you can detect it early and protect your assets and privacy by monitoring your device’s performance and watching for unusual behaviors.