The Cybersecurity and Infrastructure Security Agency (CISA), in collaboration with the Office of Management and Budget (OMB), the Office of the National Cyber Director (ONCD), and Microsoft, has announced the release of the Microsoft Expanded Cloud Log Implementation Playbook. This new guidance is designed to help organizations in both the public and private sectors leverage Microsoft Purview Audit (Standard) logs to strengthen their cybersecurity operations.
The Microsoft Expanded Cloud Log Implementation playbook offers step-by-step instructions on enabling and utilizing new logging capabilities to enhance threat detection, incident response, and enterprise security. By operationalizing these logs, organizations can better detect and defend against advanced cyber threats, particularly those targeting identity-based systems.
What the Playbook Offers
The playbook provides:
- Detailed Log Guidance: Information on how to enable and operationalize newly available cloud logs to detect malicious activity.
- Threat Hunting Scenarios: Scenario-based analysis to help organizations identify common tactics used in identity-based compromises.
- Best Practices: Recommendations on navigating Microsoft 365 logs and performing administrative actions to enable these logs effectively.
- Analytical Methodologies: Detailed guidance on leveraging the logs to detect sophisticated cyber threat actor behavior.
The playbook focuses on enabling organizations to use advanced logs, such as:
- Mail Items Accessed: Monitoring unauthorized or suspicious access to emails.
- Mail Items Sent: Identifying potentially malicious outbound email activity.
- User Searches in SharePoint Online and Exchange Online: Detecting unusual or unauthorized searches.
Additionally, the playbook explains how to ingest these logs into Security Information and Event Management (SIEM) systems like Microsoft Sentinel and Splunk for deeper analysis and integration into cybersecurity workflows.
Significance of Expanded Cloud Logging
Microsoft expanded its cloud logging capabilities in 2023, making advanced logs available to public entities using Microsoft Purview Audit (Standard), regardless of their license tier. Previously, these logs were restricted to Audit Premium subscription customers. This update significantly broadens access to critical security data, enabling more organizations to bolster their cyber defenses.
CISA Director Jen Easterly emphasized the importance of this development:
“CISA is pleased to provide this playbook to help organizations effectively use newly introduced Microsoft security logs to strengthen their cyber defense. Necessary security logs are critical for all organizations to protect their networks. We are pleased to see this progress and continue work to ensure greater adoption of Secure by Design principles.”
National Cyber Director Harry Coker Jr. highlighted the value of collaboration in releasing this resource:
“Today’s release of the playbook is a result of close collaboration with our federal and private sector partners. The upgraded logging features available will enable network defenders to enhance their threat detection capabilities. Every organization should bolster their security, and this playbook is another step in the right direction.”
Empowering Organizations with Secure-by-Design Principles
The Secure-by-Design approach is a cornerstone of modern cybersecurity. By default, it integrates critical security features into products and systems, helping organizations better defend against malicious cyber actors. CISA continues to advocate for Secure-by-Design principles in collaboration with government and industry partners, aiming to ensure all organizations have access to essential security data.
Candice Ling, Senior Vice President of Microsoft Federal, reinforced this commitment:
“With the final publication of the Enhanced Logging Playbook, we are not only providing the critical tools to detect ever-evolving cyber threats through advanced audit logs but also equipping defenders to effectively leverage these tools to protect their networks. Microsoft remains committed to partnering with the federal government to prioritize security above all else.”
Target Audience
The Microsoft Expanded Cloud Log Implementation playbook is designed for technical personnel responsible for log collection, aggregation, correlation, and incident-response orchestration. This includes government agencies and enterprises using Microsoft E3/G3-and-above licensing.
The expanded logs, initially released to the Department of Defense and federal agencies to safeguard U.S. national security, are now accessible to a broader audience. Organizations within Microsoft’s identity boundaries can use this playbook to enhance their cyber defense capabilities.
Practical Applications of the Playbook
Organizations can leverage the playbook to:
- Enable Logs: Understand how to navigate Microsoft 365 and perform administrative actions to activate expanded logging capabilities.
- Integrate Logs into SIEMs: Use tools like Microsoft Sentinel and Splunk to centralize and analyze log data.
- Detect Threats: Identify suspicious behavior and advanced threat actor techniques, including identity-based attacks.
- Support Incident Response: Quickly detect and respond to potential security incidents.
The playbook provides actionable insights and practical steps, empowering cybersecurity teams to integrate these advanced logs into their operations.
Looking Ahead
This release marks a significant step in improving access to critical cybersecurity tools. With the playbook, organizations of all sizes can enhance their security posture, detect advanced threats, and respond effectively to cyber incidents.
CISA, ONCD, and Microsoft continue to collaborate on innovative solutions to address the evolving cyber threat landscape. By making advanced logs available and providing practical guidance, they aim to help organizations protect their networks and build a more secure digital ecosystem.
For organizations using Microsoft E3/G3-and-above licensing, the playbook is a must-read resource to operationalize expanded cloud logs and strengthen cybersecurity defenses.
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