LLMjacking評測：AI帳號遭駭，48小時燒掉8萬美元帳單 | LLMjacking Review: Stolen AI Keys Rack Up $82K in 2 Days

8月 27, 2026

By Kit 小克 | AI Tool Observer | 2026-08-27

🇹🇼 LLMjacking評測：AI帳號遭駭，48小時燒掉8萬美元帳單

LLMjacking（AI 帳號劫持）正在變成駭客眼中最好賺的新生意：偷一把 ChatGPT、Claude 或 Gemini 的 API 金鑰，接上自動化腳本瘋狂呼叫，帳單算在受害者頭上，自己則免費用到飽。資安公司 CrowdStrike 觀察到，光一次攻擊行動就在兩分鐘內打出近 20 萬次 API 請求，全部算在一個被盜用的企業 AI 帳號上；墨西哥有一名開發者的 Gemini 金鑰外洩後，48 小時內被刷出高達 8.2 萬美元帳單。

金鑰怎麼被偷的？

手法其實老套：駭客大量掃描公開的 GitHub repo、設定錯誤的雲端儲存空間，撈出被不小心 commit 進去的 .env 或設定檔，再用 infostealer 惡意程式從一般使用者電腦裡順手撈金鑰。撈到之後不是自己用完就丟——Pillar Security 的研究揭露一條完整的「商業化」供應鏈 Operation Bizarre Bazaar，被偷的 API 金鑰會先經過驗證、分級，再轉賣給下游買家，跟賣信用卡卡號的黑市邏輯一模一樣。

從省錢變攻擊武器

更值得注意的是，LLMjacking 已經不只是省錢那麼單純。資安團隊 Sysdig 揭露一個叫 VAPT 的攻擊框架，直接拿偷來的 LLM 推理能力當「大腦」，自動做服務指紋辨識、漏洞比對、甚至生成攻擊程式碼，中間幾乎不需要人手介入。換句話說，你被盜用的不只是額度，還可能變成別人手上的攻擊引擎。CrowdStrike 的報告顯示，這類利用 AI 擴大攻擊規模的行為年增 89%，Bugcrowd 執行長甚至預測，AI 帳號劫持會成為下一個頭號攻擊手法。

個人與團隊該怎麼守？

金鑰最小權限化：每把金鑰只綁定該綁的服務、IP 範圍，不要一把 key 打天下
花費上限先設好：多數平台預設沒開帳單警示，記得設 50% 用量提醒 + 硬性上限，別等帳單來才知道
金鑰絕不進版控：.env 加進 .gitignore 是基本功，懷疑外洩就立刻輪替，輪替免費又即時
看流量抓異常：request 量暴增、來源 IP 突然變成陌生地區，通常就是金鑰已經被偷用的訊號

LLMjacking 聽起來像是企業層級的問題，但只要你在公開 repo 裡貼過一次金鑰、或忘記幫側邊專案設用量上限，你就是下一個潛在受害者。防守成本很低，但多數人就是懶得做。好不好用，試了才知道。

🇺🇸 LLMjacking Review: Stolen AI Keys Rack Up $82K in 2 Days

LLMjacking — the theft and resale of AI API keys — has quietly become one of the most profitable hustles in cybercrime. Steal a ChatGPT, Claude, or Gemini key, wire it into an automated script, and let someone else's account eat the bill while you burn through tokens for free. CrowdStrike observed one campaign fire nearly 200,000 API requests in just two minutes through a single hijacked corporate AI account. A developer in Mexico had a leaked Gemini key racked up to $82,000 in charges within 48 hours.

How the Keys Get Stolen

The playbook is unglamorous: attackers scrape public GitHub repos and misconfigured cloud storage for .env files accidentally committed to version control, or harvest keys straight off infected machines with infostealer malware. What happens next is the real shift — Pillar Security research uncovered Operation Bizarre Bazaar, a fully commercialized supply chain where stolen keys get validated, tiered by provider and quota, and resold to buyers downstream, run with the same logistics as stolen credit card marketplaces.

From Cost Theft to Attack Infrastructure

The bigger shift is that LLMjacking is no longer just about free tokens. Sysdig threat research documented VAPT, a framework that uses hijacked LLM inference as its actual reasoning engine — running service fingerprinting, vulnerability matching, and exploit generation with little human input between steps. CrowdStrike reports an 89% surge in attacks that use AI to scale operations this way, and Bugcrowd CEO predicts AI account hijacking will become the top attack vector industry-wide.

What Actually Protects You

Scope keys tightly — bind each key to the specific service and IP range it needs, not "one key for everything"
Set spend caps before you need them — most providers don't enable billing alerts by default; set a 50% warning plus a hard ceiling
Never commit keys to version control — .gitignore is table stakes; rotate immediately on any suspicion of exposure, since rotation is free and instant
Watch for volume and geography anomalies — a sudden spike in requests or unfamiliar source IPs is usually the first sign a key is already compromised

LLMjacking sounds like an enterprise-only problem, but if you've ever pasted a key into a public repo or forgotten to set a spending cap on a side project, you're already exposed. The defenses are cheap — most people just haven't bothered. You won't know until you try it.

Sources / 資料來源

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