CAS-005 Exam Dumps : CompTIA SecurityX Certification Exam

In the context of improving incident response and reducing dwell time, the security analyst needs to focus on proactive measures that can quickly detect and alert on potential security breaches. Here’s a detailed analysis of the options provided:

A. Adjusting the SIEM to alert on attempts to visit phishing sites: While this is a useful measure to prevent phishing attacks, it primarily addresses external threats and doesn’t directly impact dwell time reduction, which focuses on the time a threat remains undetected within a network.

B. Allowing TRACE method traffic to enable better log correlation: The TRACE method in HTTP is used for debugging purposes, but enabling it can introduce security vulnerabilities. It’s not typically recommended for enhancing security monitoring or incident response.

C. Enabling alerting on all suspicious administrator behavior: This option directly targets the potential misuse of administrator accounts, which are often high-value targets for attackers. By monitoring and alerting on suspicious activities from admin accounts, the organization can quickly identify and respond to potential breaches, thereby reducing dwell time significantly. Suspicious behavior could include unusual login times, access to sensitive data not usually accessed by the admin, or any deviation from normal behavior patterns. This proactive monitoring is crucial for quick detection and response, aligning well with best practices in incident response.

D. Utilizing allow lists on the WAF for all users using GET methods: This measure is aimed at restricting access based on allowed lists, which can be effective in preventing unauthorized access but doesn’t specifically address the need for quick detection and response to internal threats.

Understanding the Ransomware Issue:

The key issue here is thatbackups were not recoverable within the required RPO timeframe.

This means the organizationdid not properly testitsbackup and disaster recovery (DR) processes.

To prevent this from happening again, regular disaster recovery testing is essential.

Why Option C is Correct:

Disaster recovery testing ensures that backups are functionaland can meetbusiness continuity needs.

Frequent DR testingallows organizations to identify and fixgaps in recovery strategies.

Regular testing ensuresthat recoverymeets the RPO & RTO (Recovery Time Objective) requirements.

Why Other Options Are Incorrect:

A (Encrypt & label backup tapes):While encryption is important, it does not address thefailure to meet RPO requirements.

B (Reverting to manual business processes):While amanual continuity planis good for resilience, it doesnot resolve the backup and recovery failure.

D (Tabletop exercise & RACI matrix):Atabletop exerciseis a planning activity, butit does not involve actual recovery testing.

Configuring a span port on the perimeter firewall to ingest logs is the best architectural change to ensure that all client proxy traffic is captured for analysis. Here’s why:

Comprehensive Traffic Capture: A span port (or mirror port) on the perimeter firewall can capture all inbound and outbound traffic, including traffic that might bypass the proxy. This ensures that all network traffic is available for analysis.

Centralized Logging: By capturing logs at the perimeter firewall, the organization can centralize logging and analysis, making it easier to detect and investigate anomalies.

Minimal Disruption: Implementing a span port is a non-intrusive method that does not require significant changes to the network architecture, thus minimizing disruption to existing services.