クリプトジャッキング（Cryptojacking）
攻撃者が被害者の計算能力を密かに使用して暗号資産をマイニングするサイバー犯罪の一種。
ブラウザマイニングは2017年のCoinhive登場で急増しました。防御策には、ネットワーク監視、広告ブロッカー、クラウドでの厳格なIAMポリシーの適用が含まれます。
graph LR
Center["クリプトジャッキング（Cryptojacking）"]:::main
Rel_cryptographic_hashing["cryptographic-hashing"]:::related -.-> Center
click Rel_cryptographic_hashing "/terms/cryptographic-hashing"
Rel_cryptocurrency_investigations["cryptocurrency-investigations"]:::related -.-> Center
click Rel_cryptocurrency_investigations "/terms/cryptocurrency-investigations"
Rel_blockchain_forensics["blockchain-forensics"]:::related -.-> Center
click Rel_blockchain_forensics "/terms/blockchain-forensics"
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classDef pre fill:#0f172a,stroke:#3b82f6,color:#94a3b8,rx:5,ry:5;
classDef child fill:#0f172a,stroke:#10b981,color:#94a3b8,rx:5,ry:5;
classDef related fill:#0f172a,stroke:#8b5cf6,stroke-dasharray: 5 5,color:#94a3b8,rx:5,ry:5;
linkStyle default stroke:#4b5563,stroke-width:2px;
🧒 5歳でもわかるように説明
誰かがあなたの車のガソリンタンクにこっそりホースをつないで、自分の発電機を動かしていると想像してください。車は遅くなり、ガソリン代は跳ね上がります。クリプトジャッキングはこれと同じで、ハッカーがあなたのコンピュータのパワーを盗んで自分たちのためのデジタルマネーを作ります。
🤓 Expert Deep Dive
❓ よくある質問
How do I know if my computer has been cryptojacked?
Common symptoms include: the cooling fan constantly running at high speed, the device overheating, the battery draining unusually fast, and the CPU usage sitting at 90-100% even when you aren't running heavy applications.
Why do cryptojackers mine Monero instead of Bitcoin?
Bitcoin requires expensive, specialized hardware (ASICs) to mine profitably. A regular computer CPU cannot mine Bitcoin effectively. Monero uses an algorithm (RandomX) specifically designed to be mined on standard CPUs, making regular computers perfect targets for hackers.
Can cryptojacking happen just by visiting a website?
Yes. This is called 'browser-based' or 'drive-by' cryptojacking. The hacker injects a JavaScript or WebAssembly mining script into a compromised website. While you have the tab open, the script uses your CPU to mine. It stops as soon as you close the browser.