The application risk profile should be updated when reviewing functional requirements. This will help to identify and assess the potential risks that may arise from the changes to the application, and to plan and implement appropriate risk responses. Updating the application risk profile at this stage will also help to ensure that the changes are aligned with the organization's objectives, policies, and standards, and that they meet the stakeholders' expectations and needs. Updating the application risk profile after user acceptance testing, upon release to production, or during backlog scheduling are not the best points to update the risk profile, as they may be too late or too early to capture the relevant risks and their impacts. References = Risk and Information Systems Control Study Manual, 7th Edition, Chapter 2, Section 2.1.1.1, page 511
1: ISACA Certified in Risk and Information Systems Control (CRISC) Exam Guide, Answer to Question
655.

Zero-day malware is malware that exploits unknown and unprotected vulnerabilities. This novel malware is difficult to detect and defend against, making zero-day attacks a significant threat to enterprise cybersecurity1. The best way to detect zero-day malware on an end user's workstation is to use file integrity monitoring, which is a technique that monitors and alerts on changes to files and directories that may indicate a malware infection or compromise2. By using file integrity monitoring, the end user can detect zero-day malware that may alter or damage the files or directories on their workstation, and take appropriate actions to remove or isolate the malware. File integrity monitoring can also help to prevent the spread of zero-day malware to other systems or networks, and to restore the integrity and availability of the affected files or directories. Antivirus program, database activity monitoring, and firewall log monitoring are not the best ways to detect zero-day malware on an end user's workstation, as they are not as effective or reliable as file integrity monitoring. Antivirus program is a software that scans and removes known malware from a system or network3. Antivirus program can help to protect the end user's workstation from common or known malware, but it may not be able to detect zero-day malware that does not have a signature or a pattern that matches the antivirus program's database. Database activity monitoring is a technique that monitors and audits the activities and transactions on a database, such as queries, updates, or deletions4. Database activity monitoring can help to protect the end user's database from unauthorized or malicious access or modification, but it may not be able to detect zero-day malware that does not target or affect the database. Firewall log monitoring is a technique that monitors and analyzes the logs generated by a firewall, which is a device or software that filters and controls the incoming and outgoing network traffic based on predefined rules. Firewall log monitoring can help to protect the end user's workstation from external or internal network attacks, but it may not be able to detect zero-day malware that bypasses or evades the firewall rules or that originates from the workstation itself. References = 1: What is Zero Day Malware? - Check Point Software2: File Integrity Monitoring - an overview | ScienceDirect Topics3: Antivirus Software - an overview
| ScienceDirect Topics4: Database Activity Monitoring - an overview | ScienceDirect Topics : [Firewall Log Analysis - an overview | ScienceDirect Topics] : [Risk and Information Systems Control Study Manual, Chapter 5: Information Systems Control Design and Implementation, Section 5.1: Control Design, pp. 233-
235.] : [Risk and Information Systems Control Study Manual, Chapter 5: Information Systems Control Design and Implementation, Section 5.2: Control Implementation, pp. 243-245.] : [Risk and Information Systems Control Study Manual, Chapter 5: Information Systems Control Design and Implementation, Section 5.3:
Control Monitoring and Maintenance, pp. 251-253.] : [Zero-day attack detection: a systematic literature review | Artificial Intelligence Review] : [Zero-day Attacks Detection and Prevention Methods | Apriorit]

The best recommendation to address the situation where personal information from the production environment is required for testing purposes in non-production environments is to de-identify data before being transferred to the test environment. De-identification is the process of removing or modifying any personally identifiable information (PII) or other sensitive data from the data sets, such as names, addresses, phone numbers, email addresses, etc., so that the data cannot be traced back to specific individuals. De- identification protects the privacy and confidentiality of the data, while still allowing for testing, analysis, or training purposes. Enabling data encryption, preventing the use of production data, and enforcing multi-factor authentication are also useful measures, but they do not eliminate the risk of data breaches or unauthorized access to PII. References = Risk and Information Systems Control Study Manual, Chapter 3, Section 3.3.1, page 3-21.

Penetration testing is the best method for assessing control effectiveness against technical vulnerabilities that could be exploited to compromise an information system, as it simulates a real-world attack scenario and evaluates the security posture of the system. Penetration testing is a type of security testing that involves performing authorized and ethical hacking activities on a system to identify and exploit its vulnerabilities and weaknesses. Penetration testing can help to measure and improve the effectiveness and efficiency of the controls implemented to protect the system from unauthorized access, modification, or damage.
The other options are not the best methods for assessing control effectiveness against technical vulnerabilities that could be exploited to compromise an information system. Vulnerability scanning is an automated process that uncovers potential vulnerabilities in systems and software, but it does not provide information on the impact and severity of the vulnerability or how they can be exploited using different exploitation techniques1.
Systems log correlation analysis is a process of examining and analyzing the records of system activities and events, but it does not directly test the controls or simulate the attack scenarios. Monitoring of intrusion detection system (IDS) alerts is a process of tracking and auditing the system or network for any signs of malicious or anomalous activities, but it does not evaluate the control performance or identify the root causes of the vulnerabilities. References = Vulnerability Assessment Principles | Tenable, A Complete Guide on Vulnerability Assessment Methodology, Karen Scarfone Scarfone Cybersecurity - NIST Computer Security Resource ...

The most helpful factor for an information security management team when allocating resources to mitigate exposures is the risk assessment results. The risk assessment results provide a comprehensive and objective analysis of the risks facing the enterprise, including their likelihood, impact, and root causes. The risk assessment results also help to identify the gaps and weaknesses in the existing controls, and to prioritize the risks based on their severity and urgency. The risk assessment results enable the information security management team to allocate the resources in a cost-effective and risk-based manner, and to implement the most appropriate risk responses to reduce the exposures to an acceptable level. References = Risk and Information Systems Control Study Manual, 7th Edition, Chapter 4, Section 4.1.1, page 1751