Mitigate Threats Using Microsoft Defender XDR

0.1 What Microsoft Defender XDR is

Microsoft Defender XDR is the unified security platform that correlates threat signals across email, endpoints, identity, and cloud applications into a single investigation experience. When an alert fires, you work in the Defender XDR portal. When you investigate an incident, you follow evidence across Defender products without switching consoles. When you remediate a threat, you take actions through the portal's unified interface. isolate a device, block a sender, disable an account, revoke sessions: from one place.

The platform is not four products bolted together with a shared dashboard. It is a correlation engine. Defender for Office 365 detects a phishing email. Defender for Identity detects the credential theft that follows. Defender for Endpoint detects the malware delivered to the compromised device. Defender for Cloud Apps detects the data exfiltration through a shadow cloud application. The correlation engine connects these four alerts into a single incident with a single timeline, a single set of entities, and a single investigation path. You see the full attack chain. not four fragments in four consoles.

This module teaches you to operate every major component of Defender XDR as an integrated platform. The emphasis is operational: not what features exist, but what you do when an alert fires, in what order, using which tools, and how you determine whether the incident extends beyond the initial alert domain. By the end of this module, you will have triaged incidents across every Defender product, taken remediation actions, built cross-product KQL queries in Advanced Hunting, and established the daily SOC workflow that makes investigation systematic rather than ad hoc.

0.2 What you will learn

Eight content sections covering every Defender XDR component, the daily SOC workflow, and cross-product investigation methodology.

Section 1.1. Introduction to Microsoft Defender XDR Threat Protection. What Defender XDR is, how it unifies four security products under a single correlation engine, and what each product contributes. The platform architecture mapped so you understand where each subsequent section fits.

Section 1.2. Mitigate Incidents Using Microsoft Defender XDR. The incident lifecycle from first alert to closure. The unified incident queue, incident classification, severity assessment, alert correlation: how multiple alerts become one incident. Investigation workflow and remediation actions. The daily work of a SOC analyst.

Section 1.3. Remediate Risks with Microsoft Defender for Office 365. Email as the dominant attack vector. How Defender for Office 365 detects phishing, malware, and BEC. Threat Explorer for email investigation. Remediation actions: soft delete, hard delete, block sender. Automated investigation for email threats.

Section 1.4. Manage Microsoft Defender for Endpoint Investigations. Device timelines, process trees, malicious behavior chains. Response actions — isolate, collect investigation package, run antivirus scan, live response. When malware reaches a device, this is where you investigate.

Section 1.5. Mitigate Threats Using Microsoft Defender for Identity. Identity as the attack surface that connects everything. Reconnaissance detection — LDAP, DNS enumeration. Credential theft — Kerberoasting, pass-the-hash. Lateral movement — pass-the-ticket, overpass-the-hash. On-premises Active Directory attack detection.

Section 1.6. Secure Cloud Apps with Microsoft Defender for Cloud Apps. Cloud applications beyond the M365 boundary. SaaS usage visibility, OAuth abuse and consent phishing detection, data exfiltration monitoring, session controls through Conditional Access integration.

Section 1.7. Unified Portal Operations: Daily SOC Workflow. The practical daily workflow — how to triage the incident queue efficiently, what to check at shift start, how to prioritize competing incidents, when to escalate, and how to document investigation progress. The operational rhythm that distinguishes a functional SOC analyst from someone who can navigate the portal.

Section 1.8. Cross-Product Incident Correlation. How the correlation engine connects a phishing email (Office 365) → credential theft (Identity) → endpoint compromise (Endpoint) → data exfiltration (Cloud Apps) into a single incident. KQL queries that trace the full attack chain across Advanced Hunting tables.

0.3 Why Defender XDR is the ideal platform for security operations

Defender XDR is the only security platform where a SOC analyst can investigate across email, endpoint, identity, and cloud application telemetry without leaving a single interface. The correlation engine does the cross-product linking that analysts in multi-vendor environments do manually. matching a phishing email to a compromised credential to an endpoint implant to a data exfiltration channel.

Advanced Hunting provides a unified query workspace. KQL queries run against tables from every Defender product in the same schema. EmailEvents, DeviceProcessEvents, IdentityLogonEvents, and CloudAppEvents are all queryable from a single interface. The cross-product joins you build in Section 1.8 are impossible in environments where each product has its own query language, its own schema, and its own console.

Automated investigation and response handles the mechanical triage for common alert types. classifying known false positives, collecting evidence packages, and taking initial remediation actions — so the analyst focuses on the incidents that require human judgment. The automation runs within the same platform, using the same evidence, producing results visible in the same incident timeline.

The incident graph provides visual attack chain reconstruction. Entities. users, devices, mailboxes, IP addresses, files — are mapped across alerts into a single graph that shows how the attack progressed. You see the relationships between entities rather than reading them from log entries. This is the investigation tool you will use for every scenario in Phase 4.

0.4 How to get the best from this module

Work through the sections in order. Sections 1.1 and 1.2 establish the platform architecture and incident workflow. the foundation for everything that follows. Sections 1.3 through 1.6 cover each Defender product in its investigation context. Sections 1.7 and 1.8 build the operational and analytical skills that tie the products together.

If you are an experienced SOC analyst from a non-Microsoft environment, the investigation methodology in Sections 1.2 and 1.7 will be familiar. the value is in the Microsoft-specific implementation. If you are transitioning from IT administration to security operations, every section builds on the previous, and the pace is designed for that progression.

Section 1.8 (cross-product correlation) is the module's capstone section. It synthesizes everything from 1.1 through 1.7 into a single investigation exercise. Plan to spend the most time here.

This module requires your lab environment from Module 0. Several exercises reference the Defender XDR portal at security.microsoft.com and the Advanced Hunting interface. If your tenant has P1 only (Business Premium), you can follow the narrative but will not have access to Threat Explorer or Advanced Hunting. the E5 developer tenant from Section 0.4 is recommended.

Estimated total time: 10 to 14 hours. Two to three sections per session is a comfortable pace.

0.5 Module structure

• Section 1.1. Introduction to Microsoft Defender XDR Threat Protection
• Section 1.2. Mitigate Incidents Using Microsoft Defender XDR
• Section 1.3. Remediate Risks with Microsoft Defender for Office 365
• Section 1.4. Manage Microsoft Defender for Endpoint Investigations
• Section 1.5. Mitigate Threats Using Microsoft Defender for Identity
• Section 1.6. Secure Cloud Apps with Microsoft Defender for Cloud Apps
• Section 1.7. Unified Portal Operations: Daily SOC Workflow
• Section 1.8. Cross-Product Incident Correlation

Prerequisite: Module 0 (Course Introduction). The lab environment from Sections 0.4 through 0.6 is required for hands-on exercises. SC-200 exam domain mapping from Section 0.2 is referenced throughout.

Go to Section 1.1. Introduction to Microsoft Defender XDR Threat Protection to begin.