CISA Released Free Microsoft Expanded Cloud Logging Playbook (PDF)

The Cybersecurity and Infrastructure Security Agency (CISA) has released the Microsoft Expanded Cloud Logs Implementation Playbook, a comprehensive guide aimed at empowering organizations to enhance their cybersecurity defenses.

Developed in collaboration with Microsoft, the Office of Management and Budget (OMB), and the Office of the National Cyber Director (ONCD), this playbook provides critical insights into leveraging expanded logging capabilities available through Microsoft Purview Audit (Standard).

The playbook focuses on newly introduced logging features designed to improve forensic investigations, compliance monitoring, and proactive threat detection. These capabilities include detailed records of key events such as:

• Mail Items Accessed: Tracks email access to identify potential data exfiltration.
• Mail Items Sent: Monitors outgoing emails for signs of compromised accounts.
• User Searches: Captures user-entered search queries in SharePoint Online and Exchange Online.

These logs, previously exclusive to Audit Premium customers, are now accessible to organizations with Microsoft E3/G3-and-above licensing. They enable monitoring and analysis of thousands of user and administrative operations across Microsoft services, including Exchange Online, SharePoint Online, and Microsoft Teams.

Additionally, the playbook outlines how these logs can be integrated into Security Information and Event Management (SIEM) systems such as Microsoft Sentinel and Splunk for advanced threat-hunting capabilities.

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Microsoft Expanded Cloud Logging Playbook

The playbook offers step-by-step guidance on enabling these expanded logs within Microsoft 365 (M365) environments. It includes instructions for navigating the Microsoft Purview portal, configuring audit settings, and ensuring logs are properly flowing into SIEM systems.

The document also provides analytical methodologies to detect advanced threat actor behaviors, such as credential theft, data exfiltration, and malicious insider activity.

Key features of the playbook include:

• Scenario-Based Analysis: Detailed use cases for identifying identity-based compromises and other sophisticated cyber threats.
• Proactive Threat Detection: Techniques for spotting anomalies in user behavior or administrative operations.
• Reactive Forensic Investigations: Methods for reconstructing events post-incident using enriched log data.

The playbook is tailored for IT professionals responsible for log management, incident response, and cybersecurity operations in government agencies and enterprises. It serves as a valuable resource for organizations seeking to operationalize these logs as part of their defense-in-depth strategies.

“This playbook is a game-changer in helping organizations detect and defend against advanced cyber threats,” said CISA Director Jen Easterly. “By providing greater access to critical security logs, we are enabling enterprises to better protect their networks against malicious actors.”

The release of this playbook follows significant cybersecurity incidents in recent years. In 2023, a Chinese state-sponsored hacking group exploited vulnerabilities in Microsoft’s Exchange Online service to steal sensitive emails from U.S. government officials.

This breach highlighted the need for enhanced logging capabilities to detect sophisticated intrusions. In response, Microsoft expanded its Purview Audit (Standard) features to include critical telemetry data previously available only in premium tiers.

Microsoft’s move aligns with CISA’s “Secure by Design” principles, which advocate for default access to high-quality audit logs without additional costs or configurations. The collaboration between CISA and Microsoft underscores a shared commitment to strengthening cybersecurity across public and private sectors.

Key Benefits for Organizations

Organizations adopting the guidance in this playbook can expect several benefits:

• Improved Visibility: Enhanced audit logs provide granular insights into user activities across M365 services.
• Extended Retention Periods: Log retention has been increased from 90 days to 180 days for standard customers.
• Seamless Integration: Logs can be ingested into SIEM platforms like Microsoft Sentinel or Splunk for centralized analysis.
• Actionable Intelligence: Analytical workflows help identify anomalies indicative of advanced threats or insider risks.

CISA encourages all organizations using M365 E3/G3-and-above licensing to review the playbook and implement its recommendations. By operationalizing these expanded cloud logs, enterprises can significantly enhance their ability to detect and respond to cyber incidents.

For more information or to download the Microsoft Expanded Cloud Logs Implementation Playbook, visit CISA’s official website or contact their Federal Enterprise Improvement Team (FEIT).

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