Isaca Certification CISM Exam Questions and Answers PDF

Infrastructure as a Service (IaaS) is a cloud model in which the cloud service provider (CSP) offers the basic computing resources, such as servers, storage, network, and virtualization, as a service over the internet. The cloud service buyer (CSB) is responsible for installing, configuring, managing, and securing the operating systems, applications, data, and middleware on top of the infrastructure. Therefore, the CSB assumes the most security responsibility in the IaaS model, as it has to protect the confidentiality, integrity, and availability of its own assets and information in the cloud environment.

In contrast, in the other cloud models, the CSP takes over more security responsibility from the CSB, as it provides more layers of the service stack. In Disaster Recovery as a Service (DRaaS), the CSP offers the replication and recovery of the CSB’s data and applications in the event of a disaster. In Platform as a Service (PaaS), the CSP offers the development and deployment tools, such as programming languages, frameworks, libraries, and databases, as a service. In Software as a Service (SaaS), the CSP offers the complete software applications, such as email, CRM, or ERP, as a service. In these models, the CSB has less control and visibility over the underlying infrastructure, platform, or software, and has to rely on the CSP’s security measures and contractual agreements.

References = CISM Review Manual, 16th Edition, Chapter 3: Information Security Program Development and Management, Section: Information Security Program Management, Subsection: Cloud Computing, page 140-1411

= A security exception is a formal authorization to deviate from a security policy, standard, or control, due to a valid business reason or requirement. The primary reason for granting a security exception is that the risk associated with the deviation is justified by the benefit to the business, such as increased efficiency, productivity, customer satisfaction, or competitive advantage. The security exception should be approved by the appropriate authority, such as the senior management or the risk committee, based on a risk assessment and a cost-benefit analysis. The security exception should also be documented, communicated, monitored, and reviewed periodically123. References =

1: CISM Review Manual 15th Edition, page 364

2: CISM Practice Quiz, question 1132

3: Security Policy Exception Management, section “Security Policy Exception Management Process”

The best course of action when the organization receives complaints from users that some of their files have been encrypted and they are receiving demands for money to decrypt the files is to initiate incident response. This is because the organization is facing a ransomware attack, which is a type of malicious software that encrypts the victim’s data and demands a ransom for the decryption key. Ransomware attacks can cause significant disruption, damage, and loss to the organization’s operations, assets, and reputation. Therefore, the organization needs to quickly activate its incident response plan and team, which are designed to handle such security incidents in a coordinated, effective, and efficient manner. The incident response process involves the following steps1:

Preparation: The incident response team prepares the necessary resources, tools, and procedures to respond to the incident. The team also establishes the roles, responsibilities, and communication channels among the team members and other stakeholders.

Identification: The incident response team identifies the scope, source, and severity of the incident. The team also collects and preserves the relevant evidence and logs for further analysis and investigation.

Containment: The incident response team isolates the affected systems and networks to prevent the spread of the ransomware and limit the impact of the incident. The team also implements temporary or alternative solutions to restore the essential functions and services.

Eradication: The incident response team removes the ransomware and any traces of its infection from the affected systems and networks. The team also verifies that the systems and networks are clean and secure before restoring them to normal operations.

Recovery: The incident response team restores the affected systems and networks to normal operations. The team also decrypts or restores the encrypted data from backups or other sources, if possible. The team also monitors the systems and networks for any signs of recurrence or residual issues.

Lessons learned: The incident response team conducts a post-incident review to evaluate the effectiveness and efficiency of the incident response process and team. The team also identifies the root causes, lessons learned, and best practices from the incident. The team also recommends and implements the necessary improvements and corrective actions to prevent or mitigate similar incidents in the future.

References = CISM Review Manual, 16th Edition, Chapter 4: Information Security Incident Management, Section: Incident Response Process, pages 229-2331; CISM Review Questions, Answers & Explanations Manual, 10th Edition, Question 45, page 432.

 The most important reason to conduct interviews as part of the business impact analysis (BIA) process is to obtain input from as many relevant stakeholders as possible. A BIA is a process of identifying and analyzing the potential effects of disruptive events on the organization’s critical business functions, processes, and resources. A BIA helps to determine the recovery priorities, objectives, and strategies for the organization’s continuity planning. Interviews are one of the methods to collect data and information for the BIA, and they involve direct and interactive communication with the stakeholders who are involved in or affected by the business functions, processes, and resources. By conducting interviews, the information security manager can obtain input from as many relevant stakeholders as possible, such as business owners, managers, users, customers, suppliers, regulators, and partners. This can help to ensure that the BIA covers the full scope and complexity of the organization’s business activities, and that the BIA reflects the accurate, current, and comprehensive views and expectations of the stakeholders. Interviews can also help to validate, clarify, and supplement the data and information obtained from other sources, such as surveys, questionnaires, documents, or systems. Interviews can also help to build rapport, trust, and collaboration among the stakeholders, and to increase their awareness, involvement, and commitment to the information security and continuity planning.

References = CISM Review Manual, 16th Edition, Chapter 3: Information Security Program Development and Management, Section: Business Impact Analysis (BIA), pages 178-1801; CISM Review Questions, Answers & Explanations Manual, 10th Edition, Question 65, page 602.