Sherlocked Security – XDR (Extended Detection & Response)

Unified, cross-layered detection and response that stitches together signals from endpoint, network, cloud, and identity.

1. Statement of Work (SOW)

Service Name: Extended Detection & Response (XDR)
Client Type: Mid-to-Large Enterprises, MSSP-backed Organizations, Hybrid Cloud Environments
Service Model: 24×7 Managed XDR Operations
Compliance Alignment: ISO 27001, MITRE ATT&CK, NIST 800-53, SOC 2, PCI-DSS, HIPAA

Scope Includes:

Multi-vector telemetry ingestion and normalization
Correlated detections across endpoint, cloud, network, and identity
Enriched, deduplicated, and prioritized alerts
MITRE ATT&CK-aligned response workflows
Proactive threat detection and remediation
Native integrations with major EDR, SIEM, SOAR, and identity platforms
Visibility across on-prem, hybrid, SaaS, and cloud-native environments

2. Our Approach

[Ingest + Normalize] → [Correlate + Detect] → [Contextualize + Enrich] → [Respond + Automate] → [Measure + Improve]

3. Methodology

Telemetry Integration: Connect EDR, NDR, cloud logs, identity platforms, SaaS, and DNS
Detection Correlation: Identify attacks spanning multiple surfaces (e.g., phishing → lateral movement → privilege abuse)
Contextual Enrichment: Add asset tags, CVE context, threat intelligence, business unit data
Automated Playbooks: Trigger SOAR-driven response actions based on confidence and criticality
Investigation Timeline: Build attack storylines from raw alerts and behavioral data
Closed-Loop Learning: Feed back investigation outcomes to fine-tune detection logic

4. Deliverables

XDR Detection Use Case Library (MITRE-aligned)
Attack Storylines and Visual Timelines
Enriched Alerts with Contextual Scores
Automated Response Workflow Runbooks
Weekly Risk Surface Reports (entity-based)
Incident Response Logs and RCA Summaries
Telemetry Health and Coverage Dashboards

5. Client Requirements

Active EDR/NDR/SIEM/XDR-capable tools (e.g., CrowdStrike, Microsoft Defender XDR, SentinelOne, Palo Alto Cortex)
Identity provider telemetry (Azure AD, Okta, Duo)
Network logs (Firewall, VPN, Proxy, NDR)
Endpoint and server agents deployed
Access to cloud and SaaS activity logs
Pre-existing SOAR or response automation platform (optional)
List of critical assets and privileged users

6. Tooling Stack

XDR Platforms: Microsoft Defender XDR, Palo Alto Cortex XDR, CrowdStrike Falcon Fusion, SentinelOne Singularity XDR
SIEM: Splunk, Sentinel, Chronicle, QRadar, Sumo Logic
SOAR: Palo Alto XSOAR, Splunk SOAR, Torq, Tines
EDR: SentinelOne, CrowdStrike, Carbon Black, Defender for Endpoint
NDR: Vectra, Darktrace, ExtraHop, Corelight
Cloud Security: Wiz, Prisma, Lacework, Defender for Cloud
Enrichment: Asset Inventory, Threat Intel, CMDB, CVE sources, VirusTotal, Censys

7. Engagement Lifecycle

Onboard telemetry sources and validate ingestion
Normalize and enrich data
Deploy MITRE-aligned correlation rules
Validate detection fidelity and false positive rate
Automate high-confidence playbooks
Measure detection coverage and response time
Expand use cases and threat scenarios quarterly

8. Why Sherlocked Security?

Feature	Sherlocked Advantage
Unified Detection Surface	Cross-platform, correlated visibility from endpoint to cloud
Automation-First Approach	Response playbooks triggered in seconds for verified high-confidence hits
Alert Noise Reduction	Deduplication and contextual enrichment before escalation
MITRE Mapped Response Logic	Detections organized by TTP and impact
Tiered Response Support	Tier 1 to Tier 3 analyst coverage and threat investigation handoff

9. Sample Use Cases

Use Case 1: Phishing to Lateral Movement

Signal: Email click → credential use on VPN → RDP scan in internal network
Detection: EDR + Identity + NDR correlation
Outcome: Session isolated, user locked, IOC sweep initiated

Use Case 2: Cloud Misuse + Data Exfiltration

Signal: IAM role change + S3 access spike + DNS anomaly
Detection: CloudTrail + EDR + DLP signal correlation
Outcome: Key revoked, investigation initiated

10. XDR Readiness & Operational Checklist

Telemetry Sources

[ ] Endpoint Detection (EDR)
[ ] Network Detection (NDR or firewall logs)
[ ] Cloud telemetry (AWS, Azure, GCP)
[ ] Identity logs (MFA, login, user changes)
[ ] DNS, proxy, VPN logs
[ ] SaaS activity logs (O365, Google Workspace, Salesforce, etc.)
[ ] Email security signals (phishing, spoofing attempts)
[ ] Asset inventory and tagging (critical systems, business context)
[ ] Threat intelligence sources integrated
[ ] Application logs (if applicable)

Detection Engineering

[ ] MITRE ATT&CK mapped detections
[ ] Custom correlation rules in XDR/SIEM platform
[ ] Anomaly detection baselines and peer grouping
[ ] Detection testing and red team simulation coverage
[ ] False positive and rule tuning process in place
[ ] Alert severity and confidence scoring configured
[ ] Duplicate alert suppression and event correlation logic built
[ ] Alert-to-incident stitching enabled (e.g., same actor across alerts)

Response Workflow

[ ] Defined SOAR playbooks for key alerts
[ ] Endpoint isolation capabilities tested
[ ] User lockout automation
[ ] Ticketing and escalation workflow established
[ ] Incident notification process (email, Slack, SIEM dashboard)
[ ] Root cause and containment workflow documented
[ ] Third-party integration (EDR → SOAR, SIEM → XDR → ticketing)
[ ] Response logs and timeline tracking enabled

Operations & Governance

[ ] 24×7 alert triage coverage
[ ] Weekly and monthly report formats agreed upon
[ ] Detection effectiveness KPIs tracked
[ ] Telemetry health monitoring alerts enabled
[ ] Stakeholder dashboards available (exec, IT, compliance)
[ ] XDR rules reviewed quarterly for drift or gaps
[ ] Cross-team war games/tabletop exercises conducted regularly

Continuous Improvement

[ ] Purple team validation results fed into rule updates
[ ] Incident learnings looped into detection enhancements
[ ] Behavioral analytics layered onto alert logic
[ ] New threat intel IOCs mapped to XDR detections
[ ] Annual XDR maturity review and roadmap planning

XDR