CAS-005 Exam Dumps : CompTIA SecurityX Certification Exam

The best answer is B. An attacker viewed password hashes on the device . The decisive event is sudo cat /etc/shadow SUCCESS . On Linux systems, /etc/shadow stores password hashes and related account password data. The log therefore indicates successful privileged access to that file and successful viewing of its contents. CompTIA’s SecurityX Security Operations domain includes analysis of indicators of malicious activity and investigation of suspicious system behavior; this command sequence is consistent with credential-access activity.

Why the other options are not best:

A is incorrect because there is no evidence of file injection. C is not supported because the logs show file access, not confirmed data transfer or exfiltration. D is tempting because of cd ../../ , but that is only navigation. The key security-relevant action is the successful reading of /etc/shadow , which means password hashes were viewed.

The best answer is C. Correlating based on source field in batches of time . To identify trends in SIEM data, the analyst should group related events over a time window and correlate them around a common field. In this excerpt, user1 appears repeatedly across multiple alert types, including unusual authentication, access to sensitive resources, and elevated risk score. That pattern is exactly the sort of repeated behavior that becomes visible when events are correlated by source over time. CompTIA’s official SecurityX objectives in the Security Operations domain include “Data analysis: indicators of malicious activity, trend analysis, statistics, and deduplication/correlation.” That objective language directly supports this answer.

Why the other options are not best:

A narrows only one rule window and does not systematically identify trends across multiple event types. B may reduce volume, but reduction alone does not reveal trends. D is risky because noisy rules might still provide useful context, and disabling them based only on total daily alerts can hide meaningful multi-event patterns. The practical, operational ap proach is to correlate records by a shared field such as source/user across time batches so repeated suspicious behavior stands out.

The best description of the cyber threat to a central bank implementing strict risk mitigations for the hardware supply chain, including an allow list for specific countries of origin, is the risk of physical implants and tampering. Here’s why:

Supply Chain Security: The supply chain is a critical vector for hardware tampering and physical implants, which can compromise the integrity and security of hardware components before they reach the organization.

Targeted Attacks: Banks and financial institutions are high-value targets, making them susceptible to sophisticated attacks, including those involving physical implants that can be introduced during manufacturing or shipping processes.

Strict Mitigations: Implementing an allow list for specific countries aims to mitigate the risk of supply chain attacks by limiting the sources of hardware. However, the primary concern remains the introduction of malicious components through tampering.