Cryptojacking (Crypto Malware): What it is, signs to spot, and how to remove it

What it is

Cryptojacking is sneaky malware that hijacks your CPU/GPU to mine cryptocurrency for someone else. You pay the price—slowdowns, heat, battery drain—while the attacker collects the coins.

What you may notice

• Fans roaring and the device runs hot even when idle

• Apps lag; games stutter; battery drains fast

• Task Manager/Activity Monitor shows high CPU/GPU from unknown processes

• One browser tab pins your CPU at 80–100%

How it gets in

• “Free” cracked software and fake updates

• Booby-trapped email attachments or installers

• Rogue browser extensions or websites that run hidden miners

Remove it now: quick steps

1. Disconnect from the internet.

2. Run a full anti-malware scan and reboot.

3. In startup/scheduled tasks, remove unknown entries; delete shady extensions.

4. Update OS, browser, and drivers; clear browser data (cache/site data).

Prevent it

• Install apps and extensions only from official sources; avoid cracks.

• Keep OS, browsers, and security tools updated.

• Use real-time protection and consider blocking known mining scripts.

• Check Task Manager: if idle usage isn’t idle, investigate.