How to integrate CrowdStrike with SIEM Solutions

43 February 11, 2025

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).
✅ 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

Log into the Falcon Console
- Go to Support > Tool Downloads.
- Download the Falcon SIEM Connector for your OS (Windows or Linux).
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

Open the SIEM Connector Configuration File
- Windows: C:\Program Files\CrowdStrike\SIEMConnector\config.json
- Linux: /etc/crowdstrike-siem/config.json
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.
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"
  }
}

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

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

index=crowdstrike

QRadar AQL Query:

SELECT * FROM events WHERE LOG_SOURCE='CrowdStrike Falcon'

ArcSight Query:

deviceVendor='CrowdStrike' AND deviceProduct='Falcon'

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.

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