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CompTIA CS0-003 Exam Syllabus Topics:

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

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CompTIA Cybersecurity Analyst (CySA+) Certification Exam Sample Questions (Q11-Q16):

NEW QUESTION # 11
An organization recently changed its BC and DR plans. Which of the following would best allow for the incident response team to test the changes without any impact to the business?

Answer: B

Explanation:
Performing a tabletop drill based on previously identified incident scenarios is the best way to test the changes to the BC and DR plans without any impact to the business, as it is a low-cost and low-risk method of exercising the plans and identifying any gaps or issues. A tabletop drill is a type of BC/DR exercise that involves gathering key personnel from different departments and roles and discussing how they would respond to a hypothetical incident scenario. A tabletop drill does not involve any actual simulation or disruption of the systems or processes, but rather relies on verbal communication and documentation review. A tabletop drill can help to ensure that everyone is familiar with the BC/DR plans, that the plans reflect the current state of the organization, and that the plans are consistent and coordinated across different functions. The other options are not as suitable as performing a tabletop drill, as they involve more cost, risk, or impact to the business. Simulating an incident by shutting down power to the primary data center is a type of BC/DR exercise that involves creating an actual disruption or outage of a critical system or process, and observing how the organization responds and recovers. This type of exercise can provide a realistic assessment of the BC/DR capabilities, but it can also cause significant impact to the business operations, customers, and reputation. Migrating active workloads from the primary data center to the secondary location is a type of BC/DR exercise that involves switching over from one system or site to another, and verifying that the backup system or site can support the normal operations. This type of exercise can help to validate the functionality and performance of the backup system or site, but it can also incur high costs, complexity, and potential errors or failures. Comparing the current plan to lessons learned from previous incidents is a type of BC/DR activity that involves reviewing past experiences and outcomes, and identifying best practices or improvement opportunities. This activity can help to update and refine the BC/DR plans, but it does not test or validate them in a simulated or actual scenario


NEW QUESTION # 12
A security analyst observed the following activity from a privileged account:
- Accessing emails and sensitive information
- Audit logs being modified
- Abnormal log-in times
Which of the following best describes the observed activity?

Answer: D


NEW QUESTION # 13
Which of the following software assessment methods world peak times?

Answer: E

Explanation:
Stress testing is a software assessment method that tests how an application performs under peak times or extreme workloads. Stress testing can help to identify any performance issues, bottlenecks, errors or crashes that may occur when an application faces high demand or concurrent users. Stress testing can also help to determine the maximum capacity and scalability of an application .


NEW QUESTION # 14
AXSS vulnerability was reported on one of the non-sensitive/non-mission-critical public websites of a company. The security department confirmed the finding and needs to provide a recommendation to the application owner. Which of the following recommendations will best prevent this vulnerability from being exploited? (Select two).

Answer: A,B

Explanation:
The best recommendations to prevent an XSS vulnerability from being exploited are to implement a compensating control in the source code and to fix the vulnerability using a virtual patch at the WAF. A compensating control is a technique that mitigates the risk of a vulnerability by adding additional security measures, such as input validation, output encoding, or HTML sanitization. A virtual patch is a rule that blocks or modifies malicious requests or responses at the WAF level, without modifying the application code. These recommendations are effective, efficient, and less disruptive than the other options. Reference: CompTIA CySA+ Study Guide: Exam CS0-003, 3rd Edition, Chapter 4: Security Operations and Monitoring, page 156; Cross Site Scripting Prevention Cheat Sheet, Section: XSS Defense Philosophy.


NEW QUESTION # 15
An organization's website was maliciously altered.
INSTRUCTIONS
Review information in each tab to select the source IP the analyst should be concerned about, the indicator of compromise, and the two appropriate corrective actions.



Answer:

Explanation:
see the explanation for step by step solution.
Explanation:
Step 1: Analyzing the SFTP Log
The SFTP log provides a record of file transfer and login activities:
* User "sjames" logged in from several IP addresses:
* 192.168.10.32 and 192.168.10.37 (internal network IPs)
* 32.111.16.37 and 41.21.18.102 (external IPs)
* We see file alterations in the /var/www directory, which is commonly the web directory.
* Modified files: about_us.html, index.html
* Suspicious activity:
* 192.168.11.102 and 41.21.18.102 modified the files.
* 32.111.16.37 had failed login attempts, indicating possible unauthorized access attempts.
The most suspicious IP here is 41.21.18.102, as it's associated with direct file modifications, possibly indicating unauthorized access.
Step 2: Reviewing Netstat
The netstat output shows active connections and their states:
* IP 41.21.18.102 has an ESTABLISHED connection with port 22, commonly used for SFTP.
* IP 32.111.16.37 is also attempting connections, and 32.111.16.37 connections are in a TIME_WAIT state, showing prior connections were recently closed.
The netstat output reaffirms 41.21.18.102 is actively connected and potentially involved in malicious activities.
Step 3: Checking the HTTP Access Log
The HTTP Access log shows access to about_us.html:
* 32.111.16.37 repeatedly accessed /about_us.html with 404 errors, indicating attempts to reach non- existing pages.
* 41.21.18.102 accessed the 200 status code, showing successful page requests, but since this IP was modifying files directly on the server, it might be testing or verifying changes.
Again, 41.21.18.102 stands out as it matches both successful file modification and page request patterns, while 32.111.16.37 shows unsuccessful attempts.
Step 4: Selecting the IP of Concern
Based on the above analysis:
* answer: 41.21.18.102 should be the IP of concern due to its direct file modifications on critical web files (about_us.html, index.html).
Step 5: Identifying the Indicator of Compromise
Potential indicators include unauthorized file modifications:
* Modified index.html file is the correct answer, as it indicates direct changes to website content and is often a clear sign of compromise.
Step 6: Selecting Corrective Actions
To mitigate and prevent further compromise:
* Change the password on the "sjames" account: The account was used across various IPs, indicating potential account compromise.
* Block external SFTP access: Restricting SFTP to internal IPs only would prevent unauthorized external modifications. Since 41.21.18.102 was external, this would stop similar threats.
Summary
* IP of Concern: 41.21.18.102
* Indicator of Compromise: Modified index.html file
* Corrective Actions:
* Change the password on the sjames account
* Block external SFTP access
These selections address both the immediate security breach and implement a preventative measure against future unauthorized access.


NEW QUESTION # 16
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