Malware
Cryptojacker
Cryptojacker
Malware that secretly uses a device's resources to mine cryptocurrency.
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MIGHT YOU BE AFFECTED?
Turn knowledge into action.
How does this work?
The code diverts a processor, graphics card or cloud server to benefit an attacker, increasing consumption and reducing performance.
REAL-WORLD EXAMPLE
« A compromised server mines continuously and sharply increases the cloud bill. »
Typical sequence
- 1Infect a device or steal cloud access
- 2Install a miner
- 3Continually use the resources
Warning signs
- CPU or GPU saturated while idle
- Unusual fan noise and heat
- Unexplained cloud costs
How to protect yourself
- Monitor resource use
- Protect cloud access with MFA
- Block unauthorised scripts and executables
If you think you are affected
Isolate the affected workload, stop the malicious process, close the initial access path and check cloud accounts, keys and scheduled tasks.
Last updated: 6 September 2026