CrowdStrike Falcon Next-Gen SIEM Integrates with Microsoft Defender

CrowdStrike's Falcon Next-Gen SIEM is evolving to support third-party EDR solutions, beginning with Microsoft Defender. Announced on March 23, 2026, this enhancement enables organizations to integrate Microsoft Defender telemetry into the Falcon SIEM without requiring the Falcon sensor on those endpoints. This allows for a more unified security operations center (SOC) by combining data from different sources into a single platform. The goal is to streamline threat detection, investigation, and response across diverse environments, addressing the challenges of fragmented security systems and data visibility tradeoffs. The integration aims to eliminate the "data tax" associated with ingesting large volumes of security data while accelerating security outcomes through AI-native threat detection and automation.

Attack Chain

This brief focuses on improving detection capabilities rather than describing a specific attack chain. The goal is to enhance visibility across different EDR solutions. A hypothetical chain, leveraging the integrated visibility, could involve:

1. Initial Access (Phishing): An attacker gains initial access via a phishing email.
2. Execution (PowerShell): The user clicks a malicious link, and a PowerShell script is executed.
3. Defense Evasion (Obfuscation): The PowerShell script uses obfuscation techniques to evade detection. Microsoft Defender detects this behavior and logs it.
4. Credential Access (LSASS): The script attempts to dump credentials from LSASS.
5. Lateral Movement (SMB): The attacker uses stolen credentials to move laterally to other systems via SMB.
6. Command and Control (C2): A reverse shell is established to a C2 server.
7. Data Exfiltration (Rclone): Sensitive data is exfiltrated using Rclone.
8. Impact: Data is sold on the dark web or used for further malicious activities.

Impact

The integration of Microsoft Defender data into CrowdStrike Falcon Next-Gen SIEM aims to reduce the impact of attacks by providing a more comprehensive view of the threat landscape. Without such integration, organizations might experience slower detection times, increased investigation efforts, and a higher risk of successful breaches due to fragmented visibility. By unifying data from multiple EDR solutions, organizations can improve their ability to detect and respond to sophisticated attacks, potentially preventing data breaches, ransomware incidents, and other security incidents.

Recommendation

• Deploy the provided Sigma rules to your CrowdStrike Falcon Next-Gen SIEM to detect malicious activities observed by Microsoft Defender and other integrated EDR solutions.
• Configure Microsoft Defender to send its telemetry to CrowdStrike Falcon Next-Gen SIEM to take advantage of unified detection and response capabilities.
• Utilize Falcon Onum's data filtering and enrichment capabilities to reduce noise and improve the quality of data ingested into the SIEM.
• Implement federated search to investigate across live, network, and archived data sources without costly re-ingestion.