How to Integrate CrowdStrike with SIEM Solutions

Integrating CrowdStrike Falcon with a Security Information and Event Management (SIEM) solution allows organizations to centralize threat data, improve security visibility, and enhance incident response. CrowdStrike Falcon provides real-time threat detection and endpoint activity logs that can be forwarded to SIEM platforms like Splunk, QRadar, ArcSight, and Microsoft Sentinel.

This guide explains how to integrate CrowdStrike Falcon with a SIEM solution using the Falcon SIEM Connector.

Step 1: Prerequisites

Before configuring the integration, ensure you have:
✅ Admin access to the CrowdStrike Falcon Console: https://falcon.crowdstrike.com or https://falcon.us-2.crowdstrike.com/ (Varies by tenant).
✅ SIEM platform installed and configured (e.g., Splunk, QRadar, ArcSight, Sentinel).
✅ A server or virtual machine to host the Falcon SIEM Connector.

Step 2: Download and Install the Falcon SIEM Connector

1. Log into the Falcon Console
   • Go to Support > Tool Downloads.
   • Download the Falcon SIEM Connector for your OS (Windows or Linux).
2. Install the SIEM Connector
   • On Windows, run the installer and follow the setup wizard.
   • On Linux, extract the downloaded file and run

tar -xzf falcon-siem-connector.tar.gz cd falcon-siem-connector sudo ./install.sh

Step 3: Configure the SIEM Connector

1. Open the SIEM Connector Configuration File
   • Windows: C:\\Program Files\\CrowdStrike\\SIEMConnector\\config.json
   • Linux: /etc/crowdstrike-siem/config.json
2. Modify the Configuration
   • Set the Falcon API credentials (from Falcon Console).
   • Define the SIEM event format (Splunk, JSON, CEF, Syslog).
   • Configure the log forwarding settings.
3. Example JSON Configuration for SIEM Outputj

{ "falcon_api": { "client_id": "YOUR_CLIENT_ID", "client_secret": "YOUR_CLIENT_SECRET" }, "output": { "format": "json", "destination": "syslog://your.siem.server:514" }
}

4. Save and Exit the Configuration File.

Step 4: Start and Verify the SIEM Connector

• Windows
  Open Command Prompt as Administrator and run

net start CrowdStrikeSIEMConnector

• Linux
  Start the SIEM connector using:

sudo systemctl start crowdstrike-siem

• Verify Connectivity
  Check if logs are being forwarded to your SIEM by running:

tail -f /var/log/crowdstrike-siem.log

Step 5: Validate Data in the SIEM

1. Log into your SIEM solution (e.g., Splunk, QRadar, ArcSight).
2. Search for CrowdStrike Falcon events:
   • Splunk Query:

index=crowdstrike

3. QRadar AQL Query:

SELECT * FROM events WHERE LOG_SOURCE='CrowdStrike Falcon'

4. ArcSight Query:

deviceVendor='CrowdStrike' AND deviceProduct='Falcon'

5. Verify that CrowdStrike logs are appearing in real-time.

Best Practices for SIEM Integration

✅ Enable Only Relevant Event Types – Avoid overwhelming your SIEM with unnecessary data.
✅ Use a Dedicated Log Server – Improve performance by forwarding logs to an intermediary before the SIEM.
✅ Regularly Review SIEM Dashboards – Ensure Falcon threat intelligence is being utilized effectively.