Isaca Updated CISM Exam Questions and Answers by bianka

The first step when performing triage of a malware incident is to contain the affected system, which means isolating it from the network and preventing any further communication or data transfer with the attacker or other compromised systems. Containing the affected system helps to limit the scope and impact of the incident, preserve the evidence, and prevent the spread of the malware to other systems.

References = NIST SP 800-61 Revision 2, CISM Review Manual 15th Edition

The next thing an incident response team should do after establishing that an application has been breached is to isolate the impacted systems from the rest of the network, which means disconnecting them from the internet or other network connections to prevent further spread of the attack or data exfiltration. Isolating the impacted systems can help to contain the breach and limit its impact on the organization. The other options, such as maintaining the affected systems in a forensically acceptable state, conducting a risk assessment, or informing senior management, may be done later in the incident response process, after isolating the impacted systems. References:

https://www.crowdstrike.com/cybersecurity-101/incident-response/

https://learn.microsoft.com/en-us/security/operations/incident-response-playbooks

https://www.invicti.com/blog/web-security/incident-response-steps-web-application-security/

 The primary purpose of business continuity and disaster recovery plans is to ensure that the organization can resume its critical business functions within the stated recovery time objectives (RTOs) after a disruptive event. RTOs are based on the business needs and the impact analysis of each function or process. Therefore, meeting the business needs is the best indicator that the plans are effective. Regulatory requirements, internal compliance requirements, and risk management objectives are important factors that influence the development and testing of the plans, but they are not the ultimate measure of their effectiveness. References = CISM Certified Information Security Manager Study Guide, Chapter 9: Business Continuity and Disaster Recovery, page 3071; CISM Foundations: Module 4 Course, Part Two: Business Continuity and Disaster Recovery Plans2; Imperva, Business Continuity & Disaster Recovery Planning (BCP & DRP)3

Chain of custody forms with points of contact are the best way to enable an organization to maintain legally admissible evidence because they document the sequence of control, transfer, and analysis of the evidence, and every person who handled it, the dates and times, and the purpose for each action1. They also ensure the authenticity and integrity of the evidence, and prevent tampering or loss1. Documented processes around forensic records retention are not sufficient to maintain legally admissible evidence because they do not track or verify the handling of the evidence. Robust legal framework with notes of legal actions are not sufficient to maintain legally admissible evidence because they do not record or validate the preservation of the evidence. Forensic personnel training that includes technical actions are not sufficient to maintain legally admissible evidence because they do not account or certify the custody of the evidence. References: 1 https://www.researchgate.net/publication/326079761_Digital_Chain_of_Custody