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| Section | Weight | Objectives |
|---|---|---|
| Topic 1: Security Operations | 30% | - Security Monitoring
|
| Topic 2: Threat and Attack Analysis | 20% | - Threat Intelligence
|
| Topic 3: Reporting and Communication | 0% | - Metrics and Reporting
|
| Topic 4: Incident Response | 20% | - Incident Response Process
|
| Topic 5: Vulnerability Management | 30% | - Vulnerability Response and Remediation
|
Exam4Tests has assembled a brief yet concise study material that will aid you in acing the CompTIA Cybersecurity Analyst (CySA+) Certification Exam (CS0-003) exam on the first attempt. This prep material has been compiled under the expert guidance of 90,000 experienced CompTIA professionals from around the globe. Exam4Tests offers the complete package that includes all exam questions conforming to the syllabus for passing the CompTIA Cybersecurity Analyst (CySA+) Certification Exam (CS0-003) exam certificate in the first try.
NEW QUESTION # 67
An organization conducted a web application vulnerability assessment against the corporate website, and the following output was observed:
Which of the following tuning recommendations should the security analyst share?
Answer: C
Explanation:
1. Analyze the Screenshot: The provided image shows a vulnerability scan report (likely from OWASP ZAP).
The specific alert highlighted in blue is " Cross-Domain Misconfiguration " with 34 occurrences. In CompTIA performance-based questions, the highlighted item dictates the problem you need to solve.
2. Identify the Vulnerability: Cross-Domain Misconfiguration typically refers to issues with CORS (Cross- Origin Resource Sharing).
CORS is a mechanism that allows a server to indicate any other origins (domains, schemes, or ports) than its own from which a browser should permit loading of resources.
A common misconfiguration occurs when the server sends the header Access-Control-Allow-Origin: *. This wildcard tells the browser to allow any website to access the resources on your server, which defeats the browser ' s Same-Origin Policy protection.
3. Evaluate the Solution (Option C): To tune this and fix the vulnerability without breaking functionality for legitimate partners, the analyst should change the configuration from a wildcard (*) to a specific allowlist.
Remediation: Set the Access-Control-Allow-Origin header to strictly define which authorized domains (e.g.,
https://partner.example.com) are allowed to access the resources.
This aligns perfectly with Option C.
Why the other options are incorrect:
A). Set an HttpOnly flag to force communication by HTTPS:
This is incorrect for two reasons. First, it addresses the " Cookie No HttpOnly Flag " alert, not the highlighted
" Cross-Domain " alert. Second, the definition is technically wrong: the HttpOnly flag prevents client-side scripts (like JavaScript) from accessing cookies (mitigating XSS); it does not force HTTPS. The Secure flag or HSTS headers are used to force HTTPS.
B). Block requests without an X-Frame-Options header:
This is the remediation for Clickjacking (seen in the alert list as " Missing Anti-clickjacking Header " ), not Cross-Domain Misconfiguration.
D). Disable the cross-origin resource sharing header:
While removing the header entirely defaults the browser back to the strict Same-Origin Policy (which is secure), " tuning " implies adjusting the setting to work correctly. If the application requires cross-domain communication (which the presence of the header suggests), disabling it entirely would break the application.
Configuring it correctly (Option C) is the professional remediation.
NEW QUESTION # 68
During a routine review, a security analyst identifies an unusual volume of traffic going to a local network workstation. The analyst extracts the traffic to a pcap file. To analyze the content, the analyst runs the command tcpdump -n -r file.pcap udp and port 53 and receives the following output:
Which of the following conclusions will the analyst reach based on the pcap analysis?
Answer: A
Explanation:
The tcpdump filter (udp and port 53) isolates DNS traffic. In the output, the analyst can see DNS queries
/responses, including PTR lookups and NXDomain responses. What makes this suspicious is the context ("unusual volume of traffic") combined with the appearance of encoded/high-entropy-looking content embedded in the DNS-related data in the capture.
This pattern strongly aligns with DNS tunneling, a technique used to move data (including stolen data) inside DNS queries because DNS (port 53) is widely allowed and often less inspected. In other words, the capture indicates a covert channel over DNS consistent with data exfiltration.
The All-in-One CySA+ CS0-003 guide explicitly describes DNS tunneling as an exfiltration method:
Exact extract (All-in-One Exam Guide):
"Domain Name System (DNS) tunneling, for example, is a method of sending data via encoded DNS queries... Hunters will need to keep an eye out for abnormal DNS queries or unusually high query volumes." That maps directly to this scenario:
* You were told there is an unusual volume of traffic.
* The traffic is DNS (UDP/53).
* The output shows encoded/abnormal-looking DNS content, consistent with "sending data via encoded DNS queries." The Sybex CySA+ Study Guide reinforces that DNS queries can be used as covert channels (including encoded/encrypted data inside DNS requests), and that abnormal DNS patterns are IoCs:
Exact extract (Sybex Study Guide):
"DNS tunneling is another potential issue that can be monitored... DNS queries that include encoded or encrypted data are potential IoCs to watch for." Why the other options are not supported by the pcap output
* A (Meterpreter payload delivery): Meterpreter delivery is not something you'd typically conclude from DNS-only traffic unless you see very specific exploit/payload staging indicators; the capture shown is DNS query/response behavior consistent with tunneling, not a clear Meterpreter staging pattern.
* C (SQL injection): SQLi evidence is normally visible in HTTP(S) requests, parameters, URIs, or server responses-nothing in the DNS-only view indicates SQLi payloads.
* D (DNSSEC): DNSSEC would be indicated by DNSSEC-specific records/flags (e.g., DNSKEY/DS
/RRSIG/NSEC, DO bit usage). The shown traffic is not presented as DNSSEC validation traffic; the suspicious element is encoded/high-entropy data consistent with tunneling.
* E (Normal Unix-based traffic): "Normal" is contradicted by the scenario's stated unusual traffic volume and by the presence of encoded/abnormal DNS content consistent with tunneling IoCs.
References (CompTIA CySA+ CS0-003 documents / study guides used):
* Mya Heath et al., CompTIA CySA+ All-in-One Exam Guide (CS0-003): DNS tunneling = sending data via encoded DNS queries; watch for abnormal queries / high volume
* Mike Chapple & David Seidl, CompTIA CySA+ Study Guide (CS0-003): DNS tunneling and DNS queries containing encoded/encrypted data are IoCs
NEW QUESTION # 69
Which of the following best describes the importance of KPIs in an incident response exercise?
Answer: C
Explanation:
Key Performance Indicators (KPIs) in incident response exercises help organizations prioritize improvements by measuring response effectiveness, containment success, and recovery speed. This ensures that resources are focused on the most critical areas for enhancement.
Option A (Personal performance tracking) is more relevant to HR evaluations rather than cybersecurity operations.
Option B (Describing incident resolution) is important but does not define future priorities.
Option D (Identifying tools to use) is useful but not the primary function of KPIs.
Thus, C is the correct answer, as KPIs help teams identify the most urgent areas for improvement.
NEW QUESTION # 70
Which of the following is a nation-state actor least likely to be concerned with?
Answer: A
Explanation:
A nation-state actor is a group or individual that conducts cyberattacks on behalf of a government or a political entity. They are usually motivated by national interests, such as espionage, sabotage, or influence operations. They are often highly skilled, resourced, and persistent, and they operate with the protection or support of their state sponsors. Therefore, they are less likely to be concerned with the forensic analysis for legal action of their actions, as they are unlikely to face prosecution or extradition in their own country or by international law. They are more likely to be concerned with the detection by the MITRE ATT&CK framework, which is a knowledge base of adversary tactics and techniques based on real-world observations.
The MITRE ATT&CK framework can help defenders identify, prevent, and respond to cyberattacks by nation-state actors. They are also likely to be concerned with the detection or prevention of reconnaissance activities, which are the preliminary steps of cyberattacks that involve gathering information about the target, such as vulnerabilities, network topology, or user credentials. Reconnaissance activities can expose the presence, intent, and capabilities of the attackers, and allow defenders to take countermeasures. Finally, they are likely to be concerned with the examination of their actions and objectives, which can reveal their motives, strategies, and goals, and help defenders understand their threat profile and attribution.
References:
* 1: MITRE ATT&CK
* 2: What is the MITRE ATT&CK Framework? | IBM
* 3: MITRE ATT&CK | MITRE
* 4: Cyber Forensics Explained: Reasons, Phases & Challenges of Cyber Forensics | Splunk
* 5: Digital Forensics: How to Identify the Cause of a Cyber Attack - G2
NEW QUESTION # 71
Which activity identifies critical business services and defines RPO and RTO values for those services?
Answer: C
Explanation:
ABusiness Impact Analysis (BIA)is the correct document thatidentifies critical servicesand definesRecovery Point Objectives (RPOs)andRecovery Time Objectives (RTOs). It helps organizations determine the impact of downtime and the maximum tolerable outages for business functions.
Disaster recovery plan (A)uses the information from the BIA.
Playbooks (C)are tactical and focus on specific incidents.
Backup plans (D)support BIA but don ' t define RPO/RTO themselves.
Reference:
CompTIA CySA+ Study Guide - Chapple & Seidl, Chapter 9
CySA+ Exam Objectives: Domain 3.0 - Incident Response and Management
NEW QUESTION # 72
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