* A risk response is the action or plan that is taken to address a specific risk that has been identified, analyzed, and evaluated. It can be one of the following types: mitigate, transfer, avoid, or accept.
* The highest priority when developing a risk response is to ensure that it aligns with the organization's risk appetite, which is the amount and type of risk that the organization is willing to accept in pursuit of its goals. The risk appetite is usually expressed as a range or a threshold, and it is aligned with the organization's strategy and culture.
* Aligning the risk response with the organization's risk appetite ensures that the risk response is consistent, appropriate, and proportional to the level and nature of the risk, and that it supports the organization's objectives and values. It also helps to optimize the balance between risk and return, and to create and protect value for the organization and its stakeholders.
* The other options are not the highest priority when developing a risk response, because they do not address the fundamental question of whether the risk response is suitable and acceptable for the organization.
* The risk response addresses the risk with a holistic view means that the risk response considers the interrelationships and dependencies among the risk sources, events, impacts, and responses, and the potential secondary and residual effects of the risk response. This is important to ensure that the risk response is comprehensive and effective, and that it does not create new or unintended risks, but it is not the highest priority when developing a risk response, because it does not indicate whether the risk response is aligned with the organization's risk appetite.
* The risk response is based on a cost-benefit analysis means that the risk response compares the expected costs and benefits of implementing the risk response, and selects the risk response that provides the most favorable net outcome. This is important to ensure that the risk response is efficient and economical, and that it maximizes the return on investment, but it is not the highest priority when developing a risk response, because it does not indicate whether the risk response is aligned with the organization's risk appetite.
* The risk response is accounted for in the budget means that the risk response is included in the financial plan and allocation of resources for the organization or the project. This is important to ensure that the risk response is feasible and realistic, and that it has the necessary funding and support, but it is not the highest priority when developing a risk response, because it does not indicate whether the risk response is aligned with the organization's risk appetite. References =
* ISACA, CRISC Review Manual, 7th Edition, 2022, pp. 29-30, 34-35, 38-39, 44-45, 50-51, 54-55
* ISACA, CRISC Review Questions, Answers & Explanations Database, 2022, QID 147

Information security policies are the foundation of an organization's security program, as they define the objectives, roles, responsibilities, and standards for protecting the information assets and systems. However, information security policies are not static, and they need to be reviewed and updated regularly to reflect the changes in the organization's environment, risk profile, and compliance requirements. Therefore, the best course of action when conducting an organization-wide risk assessment is to review the policies against current needs to determine adequacy. This means comparing the policies with the current threats, vulnerabilities, controls, and best practices, and identifying any gaps or weaknesses that need to be addressed.
The other options are not the best course of action, as they do not consider the current needs of the organization. Reviewing and updating the policies to align with industry standards may not be sufficient, as the organization may have specific or unique needs that are not covered by the standards. Determining that the policies should be updated annually may not be realistic, as the frequency of updates may depend on the nature and complexity of the policies and the organization. Reporting that the policies are adequate and do not need to be updated frequently may not be accurate, as the policies may be outdated or ineffective, and may expose the organization to unnecessary risks. References = Risk Assessment and Analysis Methods:
Qualitative and Quantitative - ISACA, Does Your Organization Need a Security Risk Assessment? - ISACA, SP 800-39, Managing Information Security Risk: Organization, Mission ...

Reviewing configuration settings is the best way for an organization to ensure that servers are compliant to security policy, because it helps to check and verify that the servers are configured and maintained according to the established security standards and guidelines, and that any deviations or violations are identified and corrected. A configuration setting is a parameter or option that defines the behavior or functionality of a server, such as a system, an application, or a service. A security policy is a document that outlines the security objectives, principles, and rules that the organization and its employees must follow, and the consequences of non-compliance. Reviewing configuration settings is the best way, as it helps to ensure that the servers are secure and compliant, and that any security risks or issues are detected and resolved. Reviewing change logs, server access logs, and anti-malware compliance are all possible ways to ensure that servers are compliant to security policy, but they are not the best way, as they do not provide a comprehensive and consistent view of the configuration settings and their compliance status. References = Risk and Information Systems Control Study Manual, Chapter 5, Section 5.3.2, page 200

The first step in selecting a risk response after a penetration test reveals several vulnerabilities in a web-facing application is to assess the level of risk associated with the vulnerabilities, as it involves evaluating the likelihood and impact of the vulnerabilities being exploited, and comparing them with the risk tolerance and appetite of the organization. Correcting the vulnerabilities, developing a risk response action plan, and communicating the vulnerabilities are possible steps in selecting a risk response, but they are not the first step, as they require the prior knowledge of the risk level and the optimal risk response. References = CRISC Review Manual, 7th Edition, page 108.

Understanding the Question:
* The question asks which tool is best for aggregating data from multiple systems to identify abnormal behavior.
Analyzing the Options:
* A. Cyber threat intelligence: Provides information on potential threats but does not aggregate data from multiple systems for behavior analysis.
* B. Anti-malware software: Focuses on detecting and removing malware, not aggregating data from multiple sources.
* C. Endpoint detection and response (EDR): Monitors endpoints for suspicious activity but is more limited in scope compared to SIEM systems.
* D. SIEM systems: Security Information and Event Management systems collect, aggregate, and analyze data from various sources to identify and respond to abnormal behavior.
Detailed Explanation:
* SIEM Systems: SIEM systems are designed to aggregate and analyze security data from multiple sources such as network devices, servers, and applications. They provide real-time analysis of security alerts generated by hardware and software.
* Functionality: SIEM systems use advanced analytics to correlate data from different sources and detect patterns that indicate abnormal behavior. This makes them highly effective in identifying and responding to security incidents.
* References:
* CRISC Review Manual, Chapter 3: Risk Response and Reporting, mentions the importance of centralized monitoring systems like SIEM for effective risk management.