CompTIA Updated CS0-003 Exam Questions and Answers by talha

D ("grnail.com") is a suspicious domain that resembles "gmail.com."

The high "bytes out" value (525,984 bytes) indicates potential data exfiltration.

Attackers often use typosquatting (e.g., "grnail.com" instead of "gmail.com") to trick users into visiting malicious sites.

Why Not Other Options?

A (Netflix, B YouTube, C TikTok) → Large downloads, but expected behavior for streaming sites.

E (Google Translate) → Low data volume, no exfiltration risk.

F (Office.com) → Microsoft service, no indication of malicious activity.

Attack simulationsproviderealistic, hands-on scenariosthat mirror true incidents, allowing SOC analysts topractice detection, analysis, and response skillsunder real-world pressure. These simulations are crucial for developing and reinforcing SOC procedures and incident workflows.

Phishing assessments (A)are targeted, limited training.

OpenVAS (B)is a vulnerability scanner, not a training tool.

SOAR (D)is a response automation tool.

Honeypots (E)help observe attacker behavior, but aren't training-focused.

????Reference:

CS0-003 Objectives 3.3 – Incident Response Training

Mya Heath All-in-One – Chapter 14: Post-Incident Activities and Training

A new program has been set to execute on system start is the most likely cause of the suspicious activity that is occurring, as it indicates that the malware has modified the registry keys of the system to ensure its persistence. File Integrity Monitoring (FIM) is a tool that monitors changes to files and registry keys on a system and alerts the security analyst of any unauthorized or malicious modifications. The alert triggered by FIM shows that the malware has created a new registry key under the Run subkey, which is used to launch programs automatically when the system starts. The new registry key points to a file named “update.exe” in the Temp folder, which is likely a malicious executable disguised as a legitimate update file. Official References:

https://www.comptia.org/blog/the-new-comptia-cybersecurity-analyst-your-questions-answered

https://partners.comptia.org/docs/default-source/resources/comptia-cysa-cs0-002-exam-objectives

https://www.comptia.org/training/books/cysa-cs0-002-study-guide

Thelessons learnedphase is a formal step in the incident response process where teamsreview what went wrong, what worked, and how to improvefuture responses. Management uses this toadjust policies, procedures, and controlsbased on real incident experiences.

Tabletop (A)is a simulated discussion, not post-incident.

Root cause analysis (C)finds technical origins but doesn’t focus on process improvement.

Forensics (D)supports investigation but not process revision.

????Reference:

CS0-003 Domain 3.0 – Post-Incident Activities

Chapple & Seidl – Study Guide, Chapter 11: Containment and Recovery