Microsoft Security Copilot is an AI-powered security analysis tool that helps security teams defend their organizations at machine speed and scale. Built on Microsoft's large language model infrastructure and enriched with security-specific intelligence, including 65+ trillion daily signals from Microsoft's global threat intelligence network and expertise from tracking 300+ threat actors, Security Copilot transforms how SOC teams investigate incidents, hunt for threats, and strengthen security posture.
Unlike generic AI tools, Security Copilot is purpose-built for cybersecurity. It understands security context, speaks the language of analysts, and integrates natively across the Microsoft security stack: Defender XDR, Sentinel, Purview, Entra ID, and Intune. It doesn't replace your analysts; it makes every analyst on your team perform like your best analyst.
Picture a typical SOC at 2 AM. An alert fires: a suspicious sign-in from an unfamiliar country, followed by a mailbox rule creation and a large file download. The on-call analyst needs to piece together the story. Was this a real compromise or a traveling executive? They open five different portals. They write KQL queries to correlate sign-in logs with email activity. They cross-reference the IP against threat intelligence feeds. They check if the user's device shows any malware indicators. Forty-five minutes later, they have a preliminary assessment.
Now picture that same alert with Security Copilot. The analyst types: "Summarize incident 4291: what happened, which entities are involved, and is this user's behavior anomalous?" In seconds, Copilot returns a structured narrative: the user signed in from Lagos, Nigeria (first time from this country), created an inbox rule to forward emails externally, and downloaded 2.3 GB from SharePoint. Copilot flags that the IP is associated with a known credential-harvesting infrastructure, the mailbox rule matches patterns seen in BEC campaigns, and the user has no travel history to Nigeria in Entra ID. It recommends immediate containment: revoke sessions, reset credentials, disable the forwarding rule.
What took 45 minutes now takes 3. That's not a marginal improvement; it's a fundamental transformation of how security operations work. Multiply that across dozens of incidents per day, and you begin to understand why Security Copilot isn't just another tool in the SOC. It's a force multiplier that changes the equation between attackers and defenders.
Query your security environment using everyday language. Ask "show me all risky sign-ins this week" . Copilot translates it into KQL, runs the query, and explains the results in plain English.
Extend Copilot with Microsoft first-party plugins (Defender, Sentinel, Intune, Entra) and custom plugins you build to connect your own tools, SIEM data, and third-party threat feeds.
Security Copilot is provisioned through SCUs (Security Compute Units). Understand capacity planning, usage monitoring, and cost optimization to get the most from your investment.
Microsoft Security Copilot is not a single tool. It is an AI layer that sits on top of Microsoft's security stack, using data, signals, and actions from multiple Microsoft security solutions through built-in integrations and plugins.
Microsoft’s security platform is built on the idea that defenders need a unified view across identity, endpoints, cloud, data, and applications. Six pillars converge into one ecosystem:
AI-powered SOC
Protection across platforms
Flexible detection across digital estate
Protection from code to runtime
Reduced exposure across digital estate
Comprehensive threat insights
SIEM, XDR, cloud security, exposure management, and threat intelligence all converge into one ecosystem. But even with this integrated foundation, humans still shoulder the responsibility of connecting signals and determining next steps. An analyst looking at a Defender XDR incident must manually correlate it with Sentinel detections, enrich it with threat intelligence, check exposure data, and decide on response actions across multiple portals.
Security Copilot changes that. By embedding AI directly into this unified SOC, we gain intelligence that understands context, recognises threat patterns, and guides analysts with clear next-step reasoning. It reads across all six pillars simultaneously - correlating XDR alerts with SIEM detections, enriching them with threat intelligence, factoring in exposure data, and recommending response actions - all in a single natural-language interaction. It turns a connected SOC into an intelligent SOC.
And that intelligence is key as we move toward the next evolution: autonomous protection. Today, Copilot assists analysts with recommendations and guided response. Tomorrow, trusted AI agents will be able to detect, investigate, and contain threats independently - with human oversight at decision points. The journey from manual SOC → connected SOC → intelligent SOC → autonomous SOC is the trajectory that Microsoft’s unified SecOps vision is building toward. Security Copilot is the bridge between where SOCs are today and where they need to be.
Each capability represents hours saved per incident, blind spots eliminated, and expertise gaps closed. These aren't theoretical features - they're workflows that enterprise SOC teams use every day.
Copilot ingests all alerts, entities, timelines, and evidence attached to an incident and produces a clear, executive-ready narrative in seconds. Junior analysts can triage complex multi-stage attacks that previously required senior expertise. Microsoft reports SOC teams using Copilot resolve incidents 22% faster on average.
Tap into Microsoft Defender Threat Intelligence (MDTI) to instantly profile threat actors, map IOCs to campaigns, and understand if threats are actively targeting your industry. Ask "What do we know about Storm-1567?" and get a complete actor profile with TTPs, infrastructure, and recommended detections.
Paste an obfuscated PowerShell script, a suspicious command line, or a malware payload. Copilot deobfuscates, explains what each line does, identifies malicious intent, and maps it to MITRE ATT&CK techniques. What takes a reverse engineer 30 minutes takes Copilot 10 seconds.
Describe what you're looking for in plain English . "Find all devices that ran PowerShell encoded commands in the last 48 hours" . and Copilot generates production-ready KQL for Sentinel or Defender advanced hunting. It even explains the query logic so you learn while you work.
After investigation, Copilot recommends specific remediation steps based on the incident context - not generic checklists, but tailored actions. "Revoke active sessions for this user, reset their credentials, remove the malicious inbox rule, and quarantine the downloaded files." actionable, sequenced, complete.
Build reusable multi-step investigation playbooks that codify your team's best practices. A senior analyst designs the promptbook once; every analyst on the team can execute it consistently. Share across the SOC to standardize triage quality and reduce training time for new hires.
Effective prompting is key to getting the best results from Security Copilot. Follow these best practices to craft prompts that deliver actionable insights.
# Incident Investigation
"Summarize incident #12345 including timeline, affected entities, and severity."
# Threat Hunting
"Search for any devices that communicated with IP 198.51.100.23 in the last 7 days."
# Script Analysis
"Analyze this PowerShell script for malicious behavior: [paste script]"
# KQL Generation
"Write a KQL query to find all failed sign-in attempts from outside the US in the last 48 hours."
# Threat Intelligence
"Tell me about the threat actor Storm-0558 and their recent tactics."
# Posture Assessment
"What are the top 5 security recommendations for improving our Microsoft Secure Score?"Promptbooks are prebuilt sequences of prompts that accomplish common security tasks end-to-end.
Step-by-step investigation prompts for triaging and analyzing security incidents.
Proactive threat hunting sequences using KQL and Defender data.
Automated report creation for executives and compliance teams.
Assess and prioritize vulnerabilities across your environment.
Security Copilot offers two distinct experiences. Understanding when to use each is key to maximising your investment.
Access via securitycopilot.microsoft.com. A full-featured portal for open-ended security investigations, threat intelligence research, script analysis, and multi-step promptbook execution.
Copilot appears as a side panel inside Microsoft security products. The context is scoped to the product you are working in, giving you AI assistance right where you need it.
Deploying Security Copilot should follow Zero Trust principles: verify explicitly, use least privilege, and assume breach. Because Copilot accesses sensitive security data through on-behalf-of (OBO) authentication, a compromised admin account with Copilot access could expose your entire security posture to an attacker.
AI-powered security operations labs. activate Copilot, build promptbooks, automate threat intelligence, and design end-to-end SOC workflows.
Activate Security Copilot with SCU capacity planning, configure data source plugins for Sentinel and Defender XDR, run your first natural-language investigation prompts, review Copilot-generated incident summaries, and evaluate response accuracy.
Design a multi-step triage promptbook with sequential investigation stages, create reusable prompt templates with parameterized inputs, share promptbooks with the SOC team via the Copilot library, and measure Mean Time to Triage improvements against baseline.
Connect threat intelligence plugins (Microsoft TI, MDTI), build prompts for IOC enrichment and CVE impact analysis, create a daily threat briefing workflow that aggregates intelligence across sources, and integrate Copilot outputs with Sentinel watchlists.
Design a complete SOC workflow: automated alert triage with Copilot, evidence collection across Defender products, guided investigation with cross-product KQL queries, executive report generation with AI-written summaries, and post-incident lessons-learned documentation.
Explore Copilot embedded in Defender XDR, Sentinel, Entra, Intune, and Purview. Apply Zero Trust principles with Conditional Access, least privilege roles, PIM, and phased deployment.