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CompTIA CS0-004 Exam Syllabus Topics:

Section	Weight	Objectives
Topic 1: Incident Response and Management	24%	- Incident Response Techniques 1. Evidence gathering and preservation 2. Timeline, severity, impact, and prioritization 3. Isolation and escalation 4. Corrective action development 5. Remediation and verification 6. Root cause analysis 7. Training and exercises 8. Playbooks and roles 9. Incident response and communication plans 10. Alerts, notifications, and triage 11. Restoration 12. Log collection, correlation, and enrichment - Attack Methodology Frameworks 1. Diamond Model of Intrusion Analysis 2. MITRE ATT&CK 3. Cyber Kill Chain - Incident Response Process 1. Post-incident activities 2. Preparation 3. Recovery 4. Analysis 5. Detection 6. Containment 7. Eradication
Topic 2: Security Operations	34%	- Indicators of Potential Malicious Activity 1. Cloud-related indicators 2. Social engineering attacks 3. Application-related indicators 4. Unauthorized configuration 5. Identity-based indicators 6. Email-related attacks 7. Network-related indicators 8. Host-related indicators - Threat Intelligence and Threat Hunting 1. Indicators of compromise 2. Collection methods and sources 3. Threat actors 4. Tactics, techniques, and procedures 5. Confidence-level impacts 6. Cyber deception 7. Threat modeling 8. Threat mapping - System and Network Architecture in Security Operations 1. Data protection concepts 2. Operating system concepts 3. Infrastructure and system architecture concepts 4. Critical infrastructure concepts 5. Identity and access management 6. Device management concepts 7. Encryption techniques 8. Logging concepts 9. Network architecture concepts - Tools for Determining Malicious Activity 1. Log analysis and SIEM 2. Programming and scripting languages 3. Email analysis 4. Endpoint security 5. Packet analysis 6. Domain and IP reputation 7. User and entity behavior analysis 8. Decoding and parsing 9. File formats 10. Sandboxing 11. Pattern recognition and suspicious command analysis 12. Threat intelligence platforms 13. File analysis - Artificial Intelligence in Security Operations 1. AI governance 2. AI risks 3. AI use cases - Efficiency and Process Improvement in Security Operations 1. Technology and tool integration 2. Streamline operations 3. Standardize processes 4. Data enrichment 5. Automation and orchestration
Topic 3: Vulnerability Management	26%	- Vulnerability Scanning Methods 1. Planning considerations 2. Discovery 3. Asset inventory 4. Security baseline scanning 5. Scan types - Vulnerability Assessment Tools 1. Vulnerability scanners 2. Multipurpose tools 3. Cloud infrastructure assessment tools 4. Breach attack simulation tools 5. Web application scanners 6. Network scanning and mapping - Vulnerability Prioritization and Mitigation 1. Mitigation strategies 2. Validation of remediation 3. Context awareness 4. Scoring methods 5. Vulnerability prioritization criteria - Control Types, Risks, and Vulnerability Management 1. Control types 2. Risk management strategies 3. Policies, governance, and service-level objectives 4. Third-party risk 5. Control functions 6. Risk concepts 7. Application security
Topic 4: Reporting and Communication	16%	- Security Operations and Incident Response Reporting and Communication 1. Post-incident reporting 2. Communication plan 3. Incident declaration and escalation 4. Shift and incident handover 5. Executive summary 6. Internal threat intelligence report 7. Operational security awareness 8. Metrics and key performance indicators - Vulnerability Management Reporting and Communication 1. Risk scorecards 2. Vulnerability scan reports 3. Compliance findings 4. Stakeholder identification and communication 5. Inhibitors to remediation 6. Metrics and key performance indicators 7. Action plans

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CompTIA Cybersecurity Analyst (CySA+) Certification Exam Sample Questions (Q103-Q108):

NEW QUESTION # 103
A security analyst is scanning an ICS host (192.168.1.5) in an industrial plant for insecure ports while minimizing the impact to uptime or performance. Which of following commands should the analyst use to perform the task?

A. nmap 192.168.1.5 -T2 -P 3389
B. nmap 192.168.1.5 -T3 -P 22
C. nmap 192.168.1.5 -? -P 21
D. nmap 192.168.1.5 -T5 -P 80

Answer: C

Explanation:
Industrial control systems require minimal impact scanning, so a very slow and cautious timing template is appropriate to avoid disrupting operations. Using a low timing setting reduces packet rate and network load, making it suitable for sensitive environments while still allowing port assessment.

NEW QUESTION # 104
A security analyst runs an Nmap scan against a host with multiple open ports using the following command:
nmap 10.10.10.1 -p-
The following output is obtained after the scan:
Starting Nmap 7.95 ( https://nmap.org ) at 2025-07-15 15:55 UTC
Note: Host seems down.
Nmap done: 1 IP address (0 hosts up) scanned in 3.16 seconds
Which of the following is the most accurate way to scan the target IP for open ports?

A. nmap 10.10.10.1 -p80, 443, 445, 9999, 135, 22, 21 -b --traceroute
B. nmap -sn -p- 10.10.10.1
C. nmap -p- -Pn 10.10.10.1
D. nmap 10.10.10.1/24 -p- -R -O --script=ssl-enum-ciphers

Answer: C

Explanation:
The original scan fails because Nmap's host-discovery process concludes that the target appears offline before conducting the intended full port scan. Option C adds -Pn , instructing Nmap to skip normal host discovery and proceed with scanning the target as though it is online. The -p- option then instructs Nmap to test the complete TCP port range rather than only its default set.
This is appropriate when a live host does not respond to discovery probes because ICMP echo traffic or other discovery packets may be filtered by firewalls, host-based controls, or network policy. A system can therefore appear "down" to Nmap's discovery phase while still exposing reachable TCP services.
Option B uses -sn, which performs host discovery without a port scan and therefore contradicts the requirement. Option A scans only a limited set of explicitly identified ports and includes unrelated functionality. Option D unnecessarily changes the scope to an entire /24, performs operating-system detection and DNS resolution, and invokes an SSL cipher script; none of those modifications addresses the immediate host-discovery problem.
Study Guide Reference: Vulnerability Management # Nmap # Host Discovery # -Pn # Full Port Scanning - p- # Firewall/ICMP Filtering # Scan Troubleshooting.

NEW QUESTION # 105
A company migrated its email solution from hybrid to on premises only. The administrator made the following changes:
Hybrid, before the migration:
- v=spf1 include:cloud.mailprovider.com ip4:200.100.50.25/32 -all
On premises, after the migration:
- v=spf1 ip4:200.100.50.25/32 -all
A few weeks after the migration, multiple clients report that the company's emails are being marked as spam. The systems administrator notices that the SPF record has been manipulated by a threat actor who is spoofing the company's domain. The unauthorized change:
- v=spf1 include:cloud.mailprovider.com ip4:100.50.25.10 -all
Which of the following explains the reason legitimate emails are being marked as spam?

A. The subnet is no longer present with the IP
B. The company's IP was removed from the record.
C. The SoftFail parameter is causing the issue.
D. The cloud provider was added back.

Answer: B

Explanation:
After the unauthorized change, the SPF record no longer contained the company's legitimate mail server IP address (200.100.50.25). As a result, emails sent from the company's actual mail server failed SPF validation checks at receiving mail systems, causing those messages to be treated as suspicious and frequently marked as spam.

NEW QUESTION # 106
While reviewing logs, a SOC analyst notices traffic that is attempting connections to all hosts on ports 1-65535. Which of the following steps of the Cyber Kill Chain is most likely occurring?

A. Installation
B. Delivery
C. Reconnaissance
D. Weaponization

Answer: C

NEW QUESTION # 107
An analyst reviews the following web server log entries:
%2E%2E/%2E%2E/%2E%2E/%2E%2E/%2E%2E/%2E%2E/etc/passwd
No attacks or malicious attempts have been discovered. Which of the following most likely describes what took place?

A. Directory traversal was performed to obtain a sensitive file for further reconnaissance.
B. A PHP injection was leveraged to ensure that the sensitive file could be accessed.
C. A SQL injection query took place to gather information from a sensitive file.
D. Base64 was used to prevent the IPS from detecting the fully encoded string.

Answer: A

Explanation:
The log entry shows URL-encoded sequences (%2E%2E) representing "..", which is characteristic of a directory traversal attempt. This technique is used to access files such as /etc/passwd for reconnaissance. Even if unsuccessful, the pattern clearly indicates a traversal attempt.

NEW QUESTION # 108
......

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