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An organization experienced a sophisticated phishing attack that resulted in the compromise of confidential information from thousands of user accounts. The threat actor used a land and expand approach, where initially accessed account was used to spread emails further. The organization's cybersecurity team must conduct an in-depth root cause analysis to uncover the central factor or factors responsible for the success of the phishing attack. The very first victim of the attack was user with email [email protected]. The primary objective is to formulate effective strategies for preventing similar incidents in the future. What should the cybersecurity engineer prioritize in the root cause analysis report to demonstrate the underlying cause of the incident?
Correct Answer: A
In phishing incidents, especially with successful lateral movement (land and expand), the most critical factor is usuallyweaknesses in email security systems-such as lack of advanced phishing detection, weak DMARC/DKIM/SPF policies, or insufficient user behavior monitoring. To prevent recurrence, the root cause analysis must focus on what allowed the phishing email to bypass defenses and how initial credentials were compromised. This aligns with best practices from the Cisco CyberOps v1.2 Guide underEmail Threat Vectors and Security Control Weaknesses. Reference:CyberOps Technologies (CBRFIR) 300-215 study guide, Chapter on Threat Analysis and Root Cause Reporting. Let me know if you'd like the next batch of questions formatted and verified in the same way.
