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

Crypto Malware (Cryptojacking)

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.

    Glossary (A–Z)

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