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CompTIA CS0-003 Exam Syllabus Topics:

SectionWeightObjectives
Reporting and Communication0%- Communication Strategies
  • 1. Risk management communication
  • 2. Stakeholder communication
- Metrics and Reporting
  • 1. MTTR (Mean Time to Respond/Detect)
  • 2. Key metrics development
  • 3. Security reporting
  • 4. Security maturity models
Threat and Attack Analysis20%- Threat Analysis Process
  • 1. Anomaly detection
  • 2. Traffic and activity analysis
  • 3. Behavioral analysis
- Threat Intelligence
  • 1. Indicators of compromise (IOC)
  • 2. Threat intelligence frameworks (MITRE ATT&CK, STIX/TAXII)
  • 3. Threat intelligence types and sources
  • 4. Threat actor identification
Vulnerability Management30%- Vulnerability Validation
  • 1. Vulnerability scanning validation
  • 2. Penetration testing verification
- Vulnerability Response and Remediation
  • 1. Risk acceptance and mitigation strategies
  • 2. Remediation workflow
  • 3. Exception handling
- Vulnerability Identification
  • 1. Vulnerability scanning tools
  • 2. False positive/negative analysis
  • 3. Asset inventory and prioritization
Security Operations30%- Security Monitoring
  • 1. Log types and log analysis
  • 2. Data sources for security monitoring
  • 3. SIEM (Security Information and Event Management)
  • 4. SOAR (Security Orchestration, Automation, and Response)
  • 5. Security event collection and correlation
- Intrusion Detection/Prevention
  • 1. Indicator identification
  • 2. Host-based IDS/IPS
  • 3. Network-based IDS/IPS
- Security Posture Assessment
  • 1. Configuration management
  • 2. Vulnerability scanning and analysis
  • 3. Penetration testing fundamentals
Incident Response20%- Incident Response Process
  • 1. Containment, eradication, and recovery
  • 2. Lessons learned and post-incident activities
  • 3. Preparation and detection
- Digital Forensics
  • 1. Chain of custody
  • 2. Forensic imaging
  • 3. Evidence collection and preservation
- Incident Response Techniques
  • 1. Malware incident response
  • 2. Unauthorized access incident response
  • 3. Denial of service incident response

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CompTIA Cybersecurity Analyst (CySA+) Certification Exam Sample Questions (Q374-Q379):

NEW QUESTION # 374
A security analyst has found the following suspicious DNS traffic while analyzing a packet capture:
* DNS traffic while a tunneling session is active.
* The mean time between queries is less than one second.
* The average query length exceeds 100 characters.
Which of the following attacks most likely occurred?

Answer: A

Explanation:
Explanation
DNS exfiltration is a technique that uses the DNS protocol to transfer data from a compromised network or device to an attacker-controlled server. DNS exfiltration can bypass firewall rules and security products that do not inspect DNS traffic. The characteristics of the suspicious DNS traffic in the question match the indicators of DNS exfiltration, such as:
DNS traffic while a tunneling session is active: This implies that the DNS protocol is being used to create a covert channel for data transfer.
The mean time between queries is less than one second: This implies that the DNS queries are being sent at a high frequency to maximize the amount of data transferred.
The average query length exceeds 100 characters: This implies that the DNS queries are encoding large amounts of data in the subdomains or other fields of the DNS packets.
Official References:
https://partners.comptia.org/docs/default-source/resources/comptia-cysa-cs0-002-exam-objectives
https://resources.infosecinstitute.com/topic/bypassing-security-products-via-dns-data-exfiltration/
https://www.reddit.com/r/CompTIA/comments/nvjuzt/dns_exfiltration_explanation/


NEW QUESTION # 375
To minimize the impact of a security incident, a cybersecurity analyst has configured audit settings in the organization's cloud services. Which of the following security controls has the analyst configured?

Answer: D

Explanation:
Audit settings provide visibility into user actions and system events. These are classified as detective controls because they enable the detection of anomalies, policy violations, or unauthorized access by generating logs or alerts. They do not prevent actions (Preventive) or reverse harm (Corrective), nor do they provide policy guidance (Directive).


NEW QUESTION # 376
After detecting possible malicious external scanning, an internal vulnerability scan was performed, and a critical server was found with an outdated version of JBoss. A legacy application that is running depends on that version of JBoss. Which of the following actions should be taken FIRST to prevent server compromise and business disruption at the same time?

Answer: C

Explanation:
The DMZ is a special network zone designed to house systems that receive connections from the outside world, such as web and email servers. Sound firewall designs place these systems on an isolated network where, if they become compromised, they pose little threat to the internal network because connections between the DMZ and the internal network must still pass through the firewall and are subject to its security policy.


NEW QUESTION # 377
A security analyst needs to mitigate a known, exploited vulnerability related not tack vector that embeds software through the USB interface. Which of the following should the analyst do first?

Answer: D

Explanation:
USB ports are a common attack vector that can be used to deliver malware, steal data, or compromise systems. The first step to mitigate this vulnerability is to check the configurations of the company assets and disable or restrict the USB ports if possible. This will prevent unauthorized devices from being connected and reduce the attack surface. The other options are also important, but they are not the first priority in this scenario.
Reference:
CompTIA CySA+ CS0-003 Certification Study Guide, page 247
What are Attack Vectors: Definition & Vulnerabilities, section "How to secure attack vectors" Are there any attack vectors for a printer connected through USB in a Windows environment?, answer by user "schroeder"


NEW QUESTION # 378
The SOC receives a number of complaints regarding a recent uptick in desktop error messages that are associated with workstation access to an internal web application. An analyst, identifying a recently modified XML file on the web server, retrieves a copy of this file for review, which contains the following code:

Which of The following XML schema constraints would stop these desktop error messages from appearing?

Answer: B

Explanation:
The XML file containsJavaScript embedded within a <description> tagthat executes an alert message, which is a commonCross-Site Scripting (XSS)attack vector. The issue occurs becausethe XML schema does not restrict the input to safe characters, allowingarbitrary script executionwhen the XML file is processed by a vulnerable application.
Solution: Implement Input Validation Using an XML Schema Constraint
* Option Benforces awhitelist approachby allowingonly alphanumeric characters and spaces([a-zA- Z 0-9]*).
* This prevents the inclusion ofmalicious JavaScript or special characterssuch as <, >, or &, which are required for XSS injection.
Why are the other options incorrect?
* Option A: Restricts input to aSocial Security Number (SSN) format ([0-9]{3}-[0-9]{2}-[0-9]{4}).
While it prevents JavaScript injection, it is too restrictive and would break legitimate text-based content in the XML.
* Option C: Restricts input toonly numeric values ([0-9]*), preventing JavaScript injection but also breaking legitimate non-numeric content in the <description> field.
* Option D: Restricts input to asingle positive integer, which does not align with the expected text-based content.
Thus,Option Bis the correct answer, as it enforces proper input validation while still allowing expected text input.


NEW QUESTION # 379
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