The analysis of logs and system events will best help validate whether suspicious network activity is malicious, because they provide detailed and timely information about the source, destination, content, and context of the network traffic. Logs and system events can be collected from various sources, such as firewalls, routers, switches, servers, applications, and endpoints, and can be correlated and analyzed using tools such as security information and event management (SIEM) systems. By analyzing logs and system events, an organization can identify anomalies, patterns, trends, and indicators of compromise (IOCs) that may signal malicious network activity, such as unauthorized access, data exfiltration, malware infection, denial-of-service attack, or lateral movement. Logs and system events can also help determine the scope, impact, and root cause of the malicious network activity, and support the incident response and remediation process. References = Risk IT Framework, ISACA, 2022, p. 221

Ensuring time synchronization of log sources is the most important consideration when developing a log collection and correlation strategy, as it enables the accurate and consistent analysis and correlation of log data from different sources and systems. Time synchronization can help to identify the sequence and causality of events, and to detect and respond to any anomalies or incidents. Time synchronization can also facilitate the compliance and audit of the log data, and support the forensic investigation and legal action if needed. References = Most Asked CRISC Exam Questions and Answers, Question 10. CRISC: Certified in Risk & Information Systems Control Sample Questions, Question 248. ISACA Certified in Risk and Information Systems Control (CRISC) Certification Exam Question and Answers, Question 248. CRISC by Isaca Actual Free Exam Q&As, Question 9.

Conducting a risk assessment allows the organization to evaluate the exposure created by adopting the technology. This step ensures informed decision-making and aligns with the principles of Risk Identification and Assessment for managing emerging risks effectively.

The best way to ensure that identified risk scenarios are addressed is to review the implementation of the risk response. The risk response is the action or plan that is taken to reduce, avoid, transfer, or accept the risk, depending on the chosen risk treatment option1. Reviewing the implementation of the risk response means checking whether the risk response actions are executed as planned, whether they are effective and efficient in mitigating the risk, and whether they are aligned with the organization's objectives and risk appetite2.
Reviewing the implementation of the risk response helps to monitor and control the risk, identify any gaps or issues, and make any necessary adjustments or improvements. The other options are not the best ways to ensure that identified risk scenarios are addressed, as they are either less comprehensive or less specific than reviewing the implementation of the risk response. Creating a separate risk register for key business units is a way of documenting and tracking the risks that affect different parts of the organization. However, this is not the same as addressing the risk scenarios, as it does not indicate how the risks are treated or resolved.
Performing real-time monitoring of threats is a way of detecting and responding to any changes or events that may increase the likelihood or impact of the risks. However, this is not the same as addressing theriskscenarios, as it does not measure the effectiveness or efficiency of the risk response actions.
Performing regular risk control self-assessments is a way of evaluating and testing the design and operation of the controls that are implemented to mitigate the risks. However, this is not the same as addressing the risk scenarios, as it does not cover the other aspects of the risk response, such as risk avoidance, transfer, or acceptance. References = Risk and Information Systems Control Study Manual, 7th Edition, Chapter 2, Section 2.1.7, Page 59.

A maturity model is a tool that assesses the level of development and performance of key processes within an organization. A maturity model typically defines a set of criteria, standards, and best practices for each process, and assigns a rating or score based on the degree of compliance or achievement. A maturity model can help compare the current state of key processes to their desired state, by identifying the strengths, weaknesses, gaps, and opportunities for improvement. A maturity model can also help establish a roadmap for process improvement, by setting realistic and measurable goals and objectives, and monitoring the progress and results. References = Risk and Information Systems Control Study Manual, Chapter 1: IT Risk Identification, Section 1.4: IT Risk Scenarios, p. 49-50.