|
| 1 | +# Azure Sentinel Integration |
| 2 | + |
| 3 | +This guide covers deploying SOC Lab Docker's detection library to Microsoft Sentinel — converting the lab's KQL queries into production-grade analytics rules, automating response with Logic App playbooks, and forwarding lab events for an end-to-end pipeline experience. |
| 4 | + |
| 5 | +No live Azure subscription is required to study or customize the templates. A free Azure account is sufficient to deploy the full stack. |
| 6 | + |
| 7 | +--- |
| 8 | + |
| 9 | +## Architecture |
| 10 | + |
| 11 | +``` |
| 12 | +┌─────────────────────────────────────────────────────────────────┐ |
| 13 | +│ SOC Lab Docker (Local) │ |
| 14 | +│ │ |
| 15 | +│ ┌───────────────┐ ┌──────────────┐ ┌──────────────────┐ │ |
| 16 | +│ │ Mock Log │───►│ Filebeat │───►│ Elasticsearch │ │ |
| 17 | +│ │ Generator │ │ │ │ (localhost:9200) │ │ |
| 18 | +│ └───────────────┘ └──────┬───────┘ └──────────────────┘ │ |
| 19 | +│ │ │ |
| 20 | +└──────────────────────────────┼──────────────────────────────────┘ |
| 21 | + │ Azure Monitor Data Collector API |
| 22 | + │ (HTTPS, HMAC-SHA256 signed) |
| 23 | + ▼ |
| 24 | +┌─────────────────────────────────────────────────────────────────┐ |
| 25 | +│ Microsoft Azure │ |
| 26 | +│ │ |
| 27 | +│ ┌─────────────────────────────────────────────────────────┐ │ |
| 28 | +│ │ Log Analytics Workspace (soc_lab_CL) │ │ |
| 29 | +│ └───────────────────────────┬─────────────────────────────┘ │ |
| 30 | +│ │ │ |
| 31 | +│ ┌───────────────────────────▼─────────────────────────────┐ │ |
| 32 | +│ │ Microsoft Sentinel │ │ |
| 33 | +│ │ │ │ |
| 34 | +│ │ ┌─────────────────┐ ┌──────────────────────────────┐ │ │ |
| 35 | +│ │ │ Analytics Rules │──►│ Incidents / Alerts │ │ │ |
| 36 | +│ │ │ (8 lab rules) │ └──────────────┬───────────────┘ │ │ |
| 37 | +│ │ └─────────────────┘ │ │ │ |
| 38 | +│ │ │ Automation Rule │ │ |
| 39 | +│ │ ┌────────────────────────────────────▼───────────────┐ │ │ |
| 40 | +│ │ │ SOAR Playbooks (Logic Apps) │ │ │ |
| 41 | +│ │ │ notify_slack │ create_ticket │ isolate_host │ │ │ |
| 42 | +│ │ └────────────────────────────────────────────────────┘ │ │ |
| 43 | +│ └─────────────────────────────────────────────────────────┘ │ |
| 44 | +└─────────────────────────────────────────────────────────────────┘ |
| 45 | +``` |
| 46 | + |
| 47 | +**Data flow:** Lab events → Filebeat → Azure Monitor Data Collector API → `soc_lab_CL` table → Sentinel analytics rules evaluate every 5–15 minutes → alerts fire → Logic App playbooks automate response actions. |
| 48 | + |
| 49 | +--- |
| 50 | + |
| 51 | +## Prerequisites |
| 52 | + |
| 53 | +### Tools |
| 54 | + |
| 55 | +| Tool | Version | Install | |
| 56 | +|---|---|---| |
| 57 | +| Terraform CLI | >= 1.3.0 | https://developer.hashicorp.com/terraform/install | |
| 58 | +| Azure CLI | Latest | https://learn.microsoft.com/en-us/cli/azure/install-azure-cli | |
| 59 | +| Docker & Docker Compose | v20+ | (already installed for the lab) | |
| 60 | + |
| 61 | +### Azure Account |
| 62 | + |
| 63 | +A free Azure account includes: |
| 64 | +- 5 GB/day Log Analytics ingestion (free for 31 days, then billable — lab generates ~1 MB/day) |
| 65 | +- Microsoft Sentinel (first 10 GB/day free) |
| 66 | +- Logic Apps (pay-per-execution — idle playbooks cost nothing) |
| 67 | + |
| 68 | +Create a free account at: https://azure.microsoft.com/free/ |
| 69 | + |
| 70 | +--- |
| 71 | + |
| 72 | +## Deployment Walkthrough |
| 73 | + |
| 74 | +### Step 1 – Clone and enter the Terraform directory |
| 75 | + |
| 76 | +```bash |
| 77 | +git clone https://github.com/Josperdo/soc-lab-docker.git |
| 78 | +cd soc-lab-docker/terraform/sentinel |
| 79 | +``` |
| 80 | + |
| 81 | +### Step 2 – Authenticate to Azure |
| 82 | + |
| 83 | +```bash |
| 84 | +az login |
| 85 | +# Follow the browser prompt to complete authentication |
| 86 | +``` |
| 87 | + |
| 88 | +Verify the correct subscription is selected: |
| 89 | + |
| 90 | +```bash |
| 91 | +az account show --query "{name:name, id:id}" -o table |
| 92 | +``` |
| 93 | + |
| 94 | +To switch subscriptions: |
| 95 | + |
| 96 | +```bash |
| 97 | +az account set --subscription "YOUR-SUBSCRIPTION-ID" |
| 98 | +``` |
| 99 | + |
| 100 | +### Step 3 – Create terraform.tfvars |
| 101 | + |
| 102 | +```bash |
| 103 | +cat > terraform.tfvars << 'EOF' |
| 104 | +subscription_id = "xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx" |
| 105 | +resource_group_name = "soc-lab-sentinel-rg" |
| 106 | +location = "eastus" |
| 107 | +workspace_name = "soc-lab-sentinel-workspace" |
| 108 | +retention_in_days = 90 |
| 109 | +EOF |
| 110 | +``` |
| 111 | + |
| 112 | +Replace `subscription_id` with your actual subscription ID from `az account show`. |
| 113 | + |
| 114 | +### Step 4 – Initialize Terraform |
| 115 | + |
| 116 | +```bash |
| 117 | +terraform init |
| 118 | +``` |
| 119 | + |
| 120 | +Expected output: |
| 121 | +``` |
| 122 | +Initializing the backend... |
| 123 | +Initializing provider plugins... |
| 124 | +- Finding hashicorp/azurerm versions matching "~> 3.0"... |
| 125 | +- Installing hashicorp/azurerm v3.x.x... |
| 126 | +Terraform has been successfully initialized! |
| 127 | +``` |
| 128 | + |
| 129 | +### Step 5 – Review the plan |
| 130 | + |
| 131 | +```bash |
| 132 | +terraform plan -var-file="terraform.tfvars" |
| 133 | +``` |
| 134 | + |
| 135 | +The plan will show: |
| 136 | +- 1 resource group |
| 137 | +- 1 Log Analytics Workspace |
| 138 | +- 1 Sentinel onboarding |
| 139 | +- 8 scheduled analytics rules |
| 140 | + |
| 141 | +### Step 6 – Apply |
| 142 | + |
| 143 | +```bash |
| 144 | +terraform apply -var-file="terraform.tfvars" |
| 145 | +``` |
| 146 | + |
| 147 | +Type `yes` when prompted. Provisioning takes 2–5 minutes. |
| 148 | + |
| 149 | +### Step 7 – Note the outputs |
| 150 | + |
| 151 | +```bash |
| 152 | +terraform output workspace_customer_id # Workspace ID for data connector |
| 153 | +terraform output -raw primary_shared_key # Primary key for data connector |
| 154 | +``` |
| 155 | + |
| 156 | +Store these securely — you need them in the next step. |
| 157 | + |
| 158 | +--- |
| 159 | + |
| 160 | +## Navigating Analytics Rules in the Sentinel UI |
| 161 | + |
| 162 | +After `terraform apply` completes: |
| 163 | + |
| 164 | +1. Open the [Azure portal](https://portal.azure.com) |
| 165 | +2. Search for **Microsoft Sentinel** and open it |
| 166 | +3. Select your workspace (`soc-lab-sentinel-workspace`) |
| 167 | +4. Navigate to **Configuration** → **Analytics** |
| 168 | + |
| 169 | +You should see all 8 rules listed as "Active": |
| 170 | + |
| 171 | +``` |
| 172 | +┌──────────────────────────────────────────────────────────────────┐ |
| 173 | +│ Analytics rules Active: 8│ |
| 174 | +├──────────────────────────────────────────────────────────────────┤ |
| 175 | +│ ✓ SOC Lab – Brute Force SSH Authentication High 5m/1h │ |
| 176 | +│ ✓ SOC Lab – Account Lockout Spike Medium 15m/1h │ |
| 177 | +│ ✓ SOC Lab – RDP Lateral Movement High 5m/1h │ |
| 178 | +│ ✓ SOC Lab – PsExec Remote Execution Detected High 5m/1h │ |
| 179 | +│ ✓ SOC Lab – WMI Remote Code Execution High 5m/1h │ |
| 180 | +│ ✓ SOC Lab – Local Privilege Escalation to SYSTEM High 5m/1h │ |
| 181 | +│ ✓ SOC Lab – Scheduled Task / Cron Persistence Medium 15m/24h │ |
| 182 | +│ ✓ SOC Lab – Suspicious Outbound Data Transfer High 15m/1h │ |
| 183 | +└──────────────────────────────────────────────────────────────────┘ |
| 184 | +``` |
| 185 | + |
| 186 | +Click any rule to view its query, entity mappings, and MITRE technique tags. |
| 187 | + |
| 188 | +--- |
| 189 | + |
| 190 | +## Enabling and Linking Playbooks to Analytics Rules |
| 191 | + |
| 192 | +### Step 1 – Deploy a playbook |
| 193 | + |
| 194 | +```bash |
| 195 | +az deployment group create \ |
| 196 | + --resource-group soc-lab-sentinel-rg \ |
| 197 | + --template-file playbooks/notify_slack/azuredeploy.json \ |
| 198 | + --parameters @playbooks/notify_slack/parameters.json |
| 199 | +``` |
| 200 | + |
| 201 | +Edit `playbooks/notify_slack/parameters.json` first to substitute your Slack webhook URL. |
| 202 | + |
| 203 | +### Step 2 – Create an automation rule |
| 204 | + |
| 205 | +1. In Sentinel → **Automation** → **Automation rules** → **Create** |
| 206 | +2. **Name:** `Alert - Notify Slack` |
| 207 | +3. **Trigger:** When alert is created |
| 208 | +4. **Conditions:** (optional) Filter by rule name or severity |
| 209 | +5. **Actions:** Run playbook → select `soc-lab-notify-slack` |
| 210 | +6. **Save** |
| 211 | + |
| 212 | +The playbook now fires automatically for every new Sentinel alert. |
| 213 | + |
| 214 | +See [playbooks/README.md](../terraform/sentinel/playbooks/README.md) for deployment instructions for all three playbooks. |
| 215 | + |
| 216 | +--- |
| 217 | + |
| 218 | +## Data Connector Setup (Event Forwarding) |
| 219 | + |
| 220 | +To forward live lab events to Sentinel, configure the Filebeat → Azure Monitor output. |
| 221 | + |
| 222 | +See [terraform/sentinel/data_connector/README.md](../terraform/sentinel/data_connector/README.md) for the full setup guide including field mapping notes and Logstash vs. direct HTTP options. |
| 223 | + |
| 224 | +Quick summary: |
| 225 | + |
| 226 | +```bash |
| 227 | +# Get credentials from Terraform outputs |
| 228 | +WORKSPACE_ID=$(terraform output -raw workspace_customer_id) |
| 229 | +PRIMARY_KEY=$(terraform output -raw primary_shared_key) |
| 230 | + |
| 231 | +# Substitute into filebeat-azure-monitor.yml and restart Filebeat |
| 232 | +# See data_connector/README.md for signing details |
| 233 | +``` |
| 234 | + |
| 235 | +Verify in Sentinel → **Logs**: |
| 236 | + |
| 237 | +```kql |
| 238 | +soc_lab_CL |
| 239 | +| take 10 |
| 240 | +``` |
| 241 | + |
| 242 | +--- |
| 243 | + |
| 244 | +## Cost Guidance |
| 245 | + |
| 246 | +| Resource | Free Tier | Lab Usage | Expected Cost | |
| 247 | +|---|---|---|---| |
| 248 | +| Log Analytics ingestion | 5 GB/day free (30 days) | ~1 MB/day | $0 | |
| 249 | +| Microsoft Sentinel | 10 GB/day free | <1 MB/day | $0 | |
| 250 | +| Logic Apps | ~4,000 runs/month free | Idle/low | $0 | |
| 251 | +| Storage (workspace) | Included | Minimal | $0 | |
| 252 | + |
| 253 | +The lab generates approximately 1 MB of log data per day under normal operation. This is well within the free tier limits for both Log Analytics and Sentinel. |
| 254 | + |
| 255 | +After the 31-day free trial, Log Analytics ingestion is billed at approximately $2.76/GB. At 1 MB/day, monthly cost remains under $0.10. |
| 256 | + |
| 257 | +--- |
| 258 | + |
| 259 | +## Cleanup |
| 260 | + |
| 261 | +To remove all Sentinel resources: |
| 262 | + |
| 263 | +```bash |
| 264 | +terraform destroy -var-file="terraform.tfvars" |
| 265 | +``` |
| 266 | + |
| 267 | +Type `yes` when prompted. This deletes the resource group, workspace, Sentinel instance, and all analytics rules. |
| 268 | + |
| 269 | +To also remove playbook Logic Apps (deployed separately via `az deployment group create`): |
| 270 | + |
| 271 | +```bash |
| 272 | +az logicapp delete \ |
| 273 | + --resource-group soc-lab-sentinel-rg \ |
| 274 | + --name soc-lab-notify-slack |
| 275 | + |
| 276 | +az logicapp delete \ |
| 277 | + --resource-group soc-lab-sentinel-rg \ |
| 278 | + --name soc-lab-create-ticket |
| 279 | + |
| 280 | +az logicapp delete \ |
| 281 | + --resource-group soc-lab-sentinel-rg \ |
| 282 | + --name soc-lab-isolate-host |
| 283 | +``` |
| 284 | + |
| 285 | +--- |
| 286 | + |
| 287 | +## Further Reading |
| 288 | + |
| 289 | +- [Microsoft Sentinel documentation](https://learn.microsoft.com/en-us/azure/sentinel/) |
| 290 | +- [AzureRM Sentinel provider](https://registry.terraform.io/providers/hashicorp/azurerm/latest/docs/resources/sentinel_alert_rule_scheduled) |
| 291 | +- [Azure Monitor Data Collector API](https://learn.microsoft.com/en-us/azure/azure-monitor/logs/data-collector-api) |
| 292 | +- [Logic Apps documentation](https://learn.microsoft.com/en-us/azure/logic-apps/) |
| 293 | +- [MITRE ATT&CK](https://attack.mitre.org/) |
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