Strategic Centralization: Security Event Notifications and Auditing

This guide covers the architectural patterns and AWS services required to design a robust, centralized strategy for security monitoring, auditing, and incident response in multi-account environments.

Learning Objectives

By the end of this module, you should be able to:

• Design a multi-account logging architecture using a dedicated Log Archive account.
• Configure AWS Security Hub to aggregate findings from GuardDuty, Inspector, and Macie.
• Implement immutable storage for audit logs using S3 Object Lock (WORM).
• Evaluate strategies for redacting sensitive data before centralizing logs for forensics.
• Develop automated remediation workflows using Amazon EventBridge and AWS Lambda.

Key Terms & Glossary

• SIEM (Security Information and Event Management): A software solution that aggregates and analyzes activity from many different resources across an entire IT infrastructure.
• WORM (Write Once, Read Many): A data storage technology that allows information to be written to a storage medium once and prevents the drive from erasing or modifying the data.
• Finding: A standardized security issue notification generated by AWS services like GuardDuty or Security Hub.
• Log Redaction: The process of removing sensitive information (PII, credentials) from log files before they are stored in a central repository.
• Account Factory: A component of AWS Control Tower that automates the provisioning of new,