CompTIA Updated CS0-003 Exam Questions and Answers by zuzanna

SOAR (Security Orchestration, Automation and Response) and SIEM (Security Information and Event Management) are solutions that can help centralize the workload for the internal security team by collecting, correlating, and analyzing alerts from different sources, such as EDR. SOAR can also automate and streamline incident response workflows, while SIEM can provide dashboards and reports for security monitoring and compliance. References: What is EDR? Endpoint Detection & Response, How Does the Cyber Kill Chain Protect Against Attacks?; What is EDR Solution?, EDR solutions secure diverse endpoints through central monitoring

The correct answer is A. 121.19.30.221.

Based on the log files and the organization’s priorities, the host that warrants additional investigation is 121.19.30.221, because it is the only host that accessed a file containing sensitive data and is not from the partner vendor’s range.

The log files show the following information:

The IP addresses of the hosts that accessed the web server

The date and time of the access

The file path of the requested resource

The number of bytes transferred

The organization’s priorities are:

Unauthorized data disclosure is more critical than denial of service attempts

Denial of service attempts are more important than ensuring vendor data access

According to these priorities, the most serious threat to the organization is unauthorized data disclosure, which occurs when sensitive, protected, or confidential data is copied, transmitted, viewed, stolen, altered, or used by an individual unauthorized to do so123. Therefore, the host that accessed a file containing sensitive data and is not from the partner vendor’s range poses the highest risk to the organization.

The file that contains sensitive data is /reports/2023/financials.pdf, as indicated by its name and path. This file was accessed by two hosts: 121.19.30.221 and 216.122.5.5. However, only 121.19.30.221 is not from the partner vendor’s range, which is 216.122.5.x. Therefore, 121.19.30.221 is a potential unauthorized data disclosure threat and warrants additional investigation.

The other hosts do not warrant additional investigation based on the log files and the organization’s priorities.

Host 134.17.188.5 accessed /index.html multiple times in a short period of time, which could indicate a denial of service attempt by flooding the web server with requests45. However, denial of service attempts are less critical than unauthorized data disclosure according to the organization’s priorities, and there is no evidence that this host succeeded in disrupting the web server’s normal operations.

Host 202.180.1582 accessed /images/logo.png once, which does not indicate any malicious activity or threat to the organization.

Host 216.122.5.5 accessed /reports/2023/financials.pdf once, which could indicate unauthorized data disclosure if it was not authorized to do so. However, this host is from the partner vendor’s range, which is required to have access to monthly reports and is the only external vendor with authorized access according to the organization’s requirements.

Therefore, based on the log files and the organization’s priorities, host 121.19.30.221 warrants additional investigation as it poses the highest risk of unauthorized data disclosure to the organization.

The best practice that the company should follow with this proxy is to decommission the proxy. Decommissioning the proxy involves removing or disposing of the proxy from the rack and the network, as well as deleting or wiping any data or configuration on the proxy. Decommissioning the proxy can help eliminate the vulnerability on the proxy, as well as reduce the attack surface, complexity, or cost of maintaining the network. Decommissioning the proxy can also free up space or resources for other devices or systems that are in use or needed by the company.

Thepost-incident review processhelps an organization identify gaps in its response and security posture. Assigning different departmental groups ensures that flaws inspecific work areas (such as IT, HR, or legal teams)are identified and addressed​.

Option Bis incorrect because not all staff need exposure; the review focuses on relevant stakeholders.

Option Cis a part of the process, but the main goal is improvement, not just playbook verification.

Option D(cross-training) is a benefit but not the main objective.

Thus,A is the best answerbecause it focuses on identifyingflaws in specific areas of incident management.