Cloud Security15 min readJun 5, 2026
Cloud Incident Response Playbook 2026: Azure Sentinel, Defender XDR, and KQL
Responding to a security incident in the cloud is fundamentally different from on-premises IR. There is no physical access to affected machines, resources spin up and disappear in minutes, and the blast radius of a compromised identity can span an entire tenant in seconds. This playbook walks through the full NIST incident response lifecycle applied to Azure environments, with concrete KQL triage queries for Microsoft Sentinel, Defender XDR containment actions, evidence collection from Azure-native forensics sources, and a post-incident review framework. Whether you are handling a compromised service principal, an insider data exfiltration event, or a mass resource deletion, this guide gives you the exact commands, queries, and decision points to work through each phase systematically.
Incident ResponseMicrosoft SentinelDefender XDR