Building Cloud Siem With Sentinel

This skill covers deploying Microsoft Sentinel as a cloud-native SIEM and SOAR platform for centralized security operations. It details configuring data connectors for multi-cloud log ingestion, writing KQL detection queries, building automated response playbooks with Logic Apps, and leveraging the Sentinel data lake for petabyte-scale threat hunting across AWS, Azure, and GCP security telemetry.

Security & Compliance|v1|Updated 7/2/2026|GitHub source

MCP get_skill({ skillId: "building-cloud-siem-with-sentinel-203160c6" })

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# Building Cloud SIEM with Sentinel

## When to Use

- When establishing a centralized security operations center for multi-cloud environments
- When migrating from legacy SIEM platforms (Splunk, QRadar) to cloud-native architecture
- When building automated incident response workflows for cloud-specific threats
- When performing large-scale threat hunting across petabytes of security telemetry
- When integrating threat intelligence feeds with cloud security log analysis

**Do not use** for AWS-only environments where Security Hub and GuardDuty suffice, for endpoint detection requiring EDR capabilities (use Defender for Endpoint), or for compliance posture monitoring (see building-cloud-security-posture-management).

## Prerequisites

- Azure subscription with Microsoft Sentinel enabled on a Log Analytics workspace
- Data connector permissions for target log sources (AWS CloudTrail, Azure Activity, GCP)
- Logic Apps or Azure Functions for automated response playbooks
- KQL (Kusto Query Language) proficiency for writing detection rules and hunting queries

## Workflow

### Step 1: Provision Sentinel Workspace and Data Connectors

Create a Log Analytics workspace optimized for security data and enable data connectors for multi-cloud ingestion.

```powershell
# Create Log Analytics workspace
az monitor log-analytics workspace create \
  --resource-group security-rg \
  --workspace-name sentinel-workspace \
  --location eastus \
  --retention-time 365 \
  --sku PerGB2018

# Enable Microsoft Sentinel on the workspace
az sentinel onboarding-state create \
  --resource-group security-rg \
  --workspace-name sentinel-workspace

# Enable AWS CloudTrail connector
az sentinel data-connector create \
  --resource-group security-rg \
  --workspace-name sentinel-workspace \
  --data-connector-id aws-cloudtrail \
  --kind AmazonWebServicesCloudTrail \
  --aws-cloud-trail-data-connector '{
    "awsRoleArn": "arn:aws:iam::123456789012:role/SentinelCloudTrailRole",
    "dataTypes": {"logs": {"state": "Enabled"}}
  }'

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