Microsoft Defender Threat Hunting and Purview eDiscovery Consulting
KQL Threat Hunting | Defender for Endpoint | Purview eDiscovery | Delivered In Your Environment
4n6PI brings deep hands-on experience with Microsoft Defender for Endpoint and Microsoft Purview eDiscovery to engagements delivered directly within your organization's existing Microsoft 365 environment. No additional product licensing required on your end.
How Engagements Work
4n6PI operates as a contracted specialist within your existing Microsoft security stack. Your organization retains its Defender for Endpoint and Microsoft 365 licensing -- 4n6PI provides the investigative expertise, KQL query development, and Purview workflow execution that your internal team may not have the capacity or experience to perform.
This model is common in enterprise DFIR and eDiscovery engagements. You get specialist-level output without the cost of hiring a full-time resource, and without needing to purchase separate tooling. Engagements are handled with strict confidentiality and full documentation of methodology.
Defender for Endpoint -- Threat Hunting and Investigation
KQL Threat Hunting
Development and execution of KQL queries against your Defender for Endpoint telemetry to surface attacker behavior, lateral movement, persistence mechanisms, and anomalous activity that automated detections miss.
Alert Investigation and Triage
Structured investigation of Defender alerts to determine scope, root cause, and impact. Separates confirmed incidents from false positives and provides actionable findings to support remediation decisions.
Behavioral Anomaly Detection
Query-driven analysis of user and device behavior patterns to identify indicators of compromise, policy violations, and suspicious activity that fall outside normal baselines.
Incident Scope Determination
Using Defender telemetry to establish the full scope of a security incident -- identifying affected endpoints, compromised accounts, attacker dwell time, and data exposure across the environment.
Detection Logic Development
Development of repeatable KQL detection queries and custom detection rules tailored to your environment, providing ongoing detection capability beyond the initial engagement.
Threat Hunting Reporting
Structured reporting of threat hunting findings documenting queries executed, artifacts identified, conclusions drawn, and recommended remediation actions -- suitable for security leadership and legal review.
Microsoft Purview eDiscovery -- Case Management and Collection
eDiscovery Case Setup and Management
Creation and management of Purview eDiscovery cases aligned to litigation holds, regulatory inquiries, or internal investigations. Proper case structure ensures defensible collection and chain-of-custody compliance.
Custodian and Content Source Management
Identification and placement of custodians on hold, mapping of relevant content sources including mailboxes, Teams, SharePoint, and OneDrive, and documentation of hold coverage for legal purposes.
Search and Collection
Development and execution of targeted search queries to collect responsive content across Microsoft 365 data sources. Query refinement to minimize over-collection while ensuring responsive material is captured.
Review Set Management
Loading collected content into review sets, applying filters and analytics, and preparing data for attorney review or production. Includes deduplication, near-duplicate identification, and email threading.
Litigation Hold Support
Implementation and documentation of litigation holds across custodian mailboxes and content locations. Provides the audit trail and hold notification documentation required for legal defensibility.
eDiscovery Workflow Consulting
Advisory support for organizations building or improving their internal Purview eDiscovery workflows -- covering case intake, hold procedures, collection standards, and review handoff to legal counsel.
When to Engage 4n6PI
- Active security incident requiring KQL-based scope determination in Defender for Endpoint
- Threat hunting initiative where internal teams lack KQL expertise or capacity
- Litigation or regulatory matter requiring eDiscovery collection from Microsoft 365
- Insider threat investigation involving email, Teams, SharePoint, or OneDrive content
- Internal investigation requiring defensible collection and chain-of-custody documentation
- Existing Purview eDiscovery workflow that needs structure, review, or remediation
- Post-incident review requiring analysis of Defender telemetry across a defined timeframe
What You Need to Have in Place
Because 4n6PI works within your existing environment rather than providing product access, the following are needed to support a Defender or Purview engagement:
- Active Microsoft Defender for Endpoint licensing at the P2 level or equivalent for threat hunting engagements
- Microsoft Purview eDiscovery (Standard or Premium) licensing for eDiscovery engagements
- Ability to grant 4n6PI appropriate read access within your tenant for the duration of the engagement
- A designated internal contact with administrative access to coordinate access and case logistics
If you are unsure whether your current licensing supports a specific engagement type, 4n6PI can help you assess that during an initial consultation at no charge.
Start a Defender or Purview Engagement
Whether you are responding to an active incident, preparing for litigation, or conducting a proactive threat hunt, 4n6PI can be operational within your Microsoft 365 environment quickly and without disruption to your team.