How to Build an AI SOC With Tools You Already Own (Copilot Studio, Power Automate, Graph API)

说明与用途

使用现有 Microsoft 365 许可证构建 AI 辅助 SOC：Graph API 用于数据，Power Automate 用于编排，Copilot Studio 用于分析师交互。两周内，初步评估时间从约 15 分钟降至不到 2 分钟，人工审查量下降约 70%。

问题

Security teams lack time to triage the volume of alerts generated by Microsoft 365 security logs, and commercial SOC platforms are too costly and slow to integrate.

结果

In two weeks, the POC cut triage time from ~15 minutes to under 2 minutes per alert, reduced human‑review volume by ~70%, and surfaced a real compromise that rules missed.

工作流

• 1. Pull risky sign‑in signals from Microsoft Graph API using a service principal with least‑privilege permissions.
• 2. Enrich each sign‑in with user context (department, recent locations, group memberships).
• 3. Orchestrate triage in Power Automate: dismiss noise, auto‑escalate deterministic cases, send gray‑zone alerts to AI.
• 4. Use Copilot Studio to expose Power Automate flows as conversational agents for analysts.
• 5. Implement guardrails so the agent only answers what Graph can provide and refuses to speculate.
• 6. Measure triage time and adjust rules or AI prompts as needed.

证据

Our two‑week POC cost zero dollars in new tooling and cut triage time from ~15 minutes per alert to under 2.

来源

We moved to scheduled sweeps with delta queries. Design for next year’s volume.

来源

One real finding: an impossible‑travel sequence on a service account that Entra risk had rated low because it had no interactive sign‑in history.

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