Cybersecurity Audit: ISACA Cybersecurity Audit Certificate Exam

Using digital evidence to provide validation that an attack has actually occurred is an example of computer forensics. This is because computer forensics is a discipline that involves the identification, preservation, analysis, and presentation of digital evidence from various sources, such as computers, networks, mobile devices, etc., to support investigations of cyber incidents or crimes. Computer forensics helps to provide validation that an attack has actually occurred, by examining the digital traces or artifacts left by the attackers on the compromised systems or devices, and by reconstructing the sequence and timeline of events that led to the attack. The other options are not examples of using digital evidence to provide validation that an attack has actually occurred, but rather different techniques or processes that are related to computer forensics, such as extraction (B), identification C, or data acquisition (D).

The BEST indication of mature third-party vendor risk management for an organization is that the organization maintains vendor security assessment checklists. This is because vendor security assessment checklists help the organization to evaluate and monitor the security posture and performance of their third-party vendors, based on predefined criteria and standards. Vendor security assessment checklists also help the organization to identify and mitigate any gaps or issues in the vendor's security controls or processes. The other options are not as indicative of mature third-party vendor risk management for an organization, because they either involve following or mimicking the security program of either party without considering their own needs or risks (A, D), or relying on the vendor's self-assessment without independent verification or validation C.

The BEST basis for allocating proportional protection activities when comprehensive classification is not feasible is a business dependency assessment. This is because a business dependency assessment helps to identify the criticality and sensitivity of business processes and their supporting assets, based on their contribution to the organization's objectives and value proposition. This allows for prioritizing protection activities according to the level of risk and impact. The other options are not as effective as a business dependency assessment, because they either use a single classification level allocation (A), which does not account for different levels of risk and impact; require a significant amount of time and resources to perform a business process re-engineering (B); or rely on external parties to cover potential losses without reducing the likelihood or impact of incidents (D).

The backup procedure that would only copy files that have changed since the last backup was made is an incremental backup. This is because an incremental backup is a type of backup that only copies the files that have been created or modified since the previous backup, whether it was a full or an incremental backup. An incremental backup helps to reduce the backup time and storage space, as well as the recovery time, as only the changed files need to be restored. The other options are not backup procedures that would only copy files that have changed since the last backup was made, but rather different types of backup procedures that copy files based on different criteria, such as daily backup (B), differential backup C, or full backup (D).

The BEST indication that an organization's vulnerability management process is operating effectively is that remediation efforts are prioritized. This is because prioritizing remediation efforts helps to ensure that the most critical and urgent vulnerabilities are addressed first, based on their severity, impact, and exploitability. Prioritizing remediation efforts also helps to optimize the use of resources and time for mitigating vulnerabilities and reducing risks. The other options are not as indicative of an effective vulnerability management process, because they either involve communicating (A), approving (B), or reviewing C aspects that are not directly related to remediating vulnerabilities.