A Security Information and Event Management (SIEM) system is the most suitable solution. SIEM platforms are specifically designed to ingest, aggregate, and correlate log data from a wide variety of sources, including on-premises data centers and cloud workloads. A core function of a SIEM is to apply analytics and correlation rules to this consolidated data to automatically detect security threats, anomalies, and policy violations, and then generate alerts. This directly addresses both the requirement for log consolidation from a hybrid environment and the need for an automated detection and alerting mechanism.

A. IDS/IPS: An Intrusion Detection/Prevention System is a source of security event logs, not a central platform for consolidating and analyzing logs from multiple, diverse systems.

C. Data lake: A data lake is a storage repository for raw data. While it can store logs, it lacks the built-in security intelligence, correlation engines, and automated alerting features inherent to a SIEM.

D. Syslog: Syslog is a standard protocol and a type of server for forwarding and collecting log messages. It does not, by itself, provide the advanced analysis, correlation, or automated detection capabilities required.

1. National Institute of Standards and Technology (NIST) Special Publication 800-92

"Guide to Computer Security Log Management."

Reference: Section 2.3

"Security Information and Event Management

" describes SIEMs as solutions that "provide the ability to perform analysis of log data... in near real-time" and "provide a simplified

centralized view of the security-related events." This supports the choice of SIEM for centralized analysis and detection.

2. Carnegie Mellon University

Software Engineering Institute

"Common Sense Guide to Mitigating Insider Threats

5th Edition."

Reference: Practice 17

"Use a SIEM to Log

Monitor

and Audit Employee Actions

" page 101. The guide states

"A SIEM system centralizes logging capabilities

and it can correlate and analyze data from multiple sources... to identify suspicious behavior." This highlights the SIEM's role in consolidation and automated analysis.

3. SANS Institute

"Successful SIEM and Log Management Strategies for the Small- to Midsized-Business."

Reference: Page 4

"What Is a SIEM?" The document defines a SIEM as a system that "gathers all the important logs from a network in one place" and "analyzes the logs to identify activity that is outside the norm." This confirms its function for both consolidation and automated detection.