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What this integration is

This integration ingests Microsoft Defender for Endpoint alerts via the Defender for Endpoint API. Vendor reference:

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Data path (how it flows)

  1. Microsoft Defender for Endpoint → API polling (OAuth2)
  2. Collector → syslog/ingest into Graylog (implementation-dependent)
  3. Graylog → stream/index/dashboards

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Prerequisites

  • Azure app registration for API access
  • API permissions granted:
    • Alert.Read.All
    • Alert.ReadWrite.All

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Credentials & config you’ll need

  • Tenant ID
  • Client ID
  • Client secret
  • Token URL: https://login.microsoftonline.com/<TENANT_ID>/oauth2/token
  • Syslog host/port (Graylog)
Example (for context; CoPilot provisioning typically fills this): 
filebeat.modules:
- module: microsoft
  defender_atp:
    enabled: true
    var.oauth2.client.id: "CLIENT_ID"
    var.oauth2.client.secret: "CLIENT_SECRET"
    var.oauth2.token_url: "https://login.microsoftonline.com/TENANT_ID/oauth2/token"

output.logstash:
  hosts: ["REPLACE_SYSLOG_HOST:REPLACE_SYSLOG_PORT"]
  1. Provision the customer.
  2. Add Defender for Endpoint integration under the customer.
  3. Provide tenant/client credentials.
  4. Deploy/start the connector container generated during provisioning.
Provisioning typically creates:
  • Graylog input + stream + index
  • Grafana datasource + dashboards
  • A customer-specific docker compose + Filebeat config

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Deployment notes (connector container)

docker compose -f /opt/CoPilot/data/data/<CUSTOMER_NAME>/<CUSTOMER_NAME>_docker-compose-defender-for-endpoint.yml up -d

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Success criteria

  • Defender alerts are arriving
  • Events are routed to the correct customer index/stream

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Troubleshooting

  • Confirm the Azure app has the required permissions and admin consent.
  • Confirm tenant ID/client ID/secret match.
  • Check connector logs for OAuth failures.