CS0-003 Comptia CySA+ Certification Exam

Exam Summary & Specifications

Exam Code: CS0-003

Number of Questions: Maximum of 85 questions

Type of Questions: Multiple-choice and Performance-Based Questions (PBQs)

Length of Test: 165 Minutes

Passing Score: 750 (on a scale of 100–900)

Recommended Experience: 4 years of hands-on experience as an incident response analyst or SOC analyst, or equivalent knowledge (Network+ and Security+ level background).

Weighting of Exam Domains

Domain Weight

1.0 Security Operations 33%

2.0 Vulnerability Management 30%

3.0 Incident Response and Management 20%

4.0 Reporting and Communication 17%

Total 100%

Domain 1.0: Security Operations (33%)

This domain validates your ability to monitor, optimize, and analyze system environments utilizing modern architecture concepts and behavioral analysis tools.

1.1 Explain the importance of system and network architecture concepts in security operations.

Log Ingestion & Continuous Monitoring: Centralization, log collection, time synchronization (NTP), logging levels (e.g., debug, info, warning, critical).

Operating System (OS) Concepts: Windows Registry, system hardening, file structure, configuration file locations, system processes, and hardware architecture.

Infrastructure Concepts: Serverless environments, virtualization, and containerization.

Network Architecture: On-premises, cloud, and hybrid setups. Network segmentation, Zero Trust architectures, Secure Access Service Edge (SASE), and Software-Defined Networking (SDN).

Identity and Access Management (IAM): Multifactor Authentication (MFA), Single Sign-On (SSO), Federation, Privileged Access Management (PAM), passwordless authentication, and Cloud Access Security Brokers (CASB).

Data Security & Encryption: Public Key Infrastructure (PKI), SSL/TLS inspection, Data Loss Prevention (DLP), and protection of sensitive data types like Personally Identifiable Information (PII) and Cardholder Data (CHD).

1.2 Given a scenario, analyze indicators of potentially malicious activity.

Network-related Indicators: Bandwidth consumption anomalies, beaconing traffic, irregular peer-to-peer communication, rogue devices, network scans/sweeps, traffic spikes, and activity on unexpected ports.

Host-related Indicators: Abnormal processor/memory/drive consumption, unauthorized software installs, malicious processes, unauthorized privilege escalations, file/registry anomalies, and malicious scheduled tasks.

Application-related Indicators: Anomalous application logs, unexpected outbound communications, introduction of rogue accounts, unexpected outputs, and service interruptions.

Other Indicators: Social engineering patterns, obfuscated links, and credential harvesting.

1.3 Given a scenario, use appropriate tools or techniques to determine malicious activity.

Packet Capture & Network Analysis: Wireshark, tcpdump.

Log Analysis & Event Correlation: Security Information and Event Management (SIEM) systems and Security Orchestration, Automation, and Response (SOAR).

Endpoint Detection & Response (EDR): Endpoint security monitoring, process tree tracking, and configuration baselines.

Reputation & Lookup Tools: DNS and IP reputation checks (e.g., WHOIS, AbuseIPDB).

File & Malware Analysis: Command-line strings utilities, file hashing, VirusTotal, sandboxing tools (Joe Sandbox, Cuckoo Sandbox).

Scripting & Automation: Interpreting basic automation scripts written in Python, PowerShell, or Bash.

1.4 Compare and contrast threat intelligence and threat hunting concepts.

Indicators of Compromise (IoC): Collection, analysis, and tactical application.

Threat Intelligence Infrastructure: Threat feeds, Tactics, Techniques, and Procedures (TTPs), threat actor classifications, and sharing communities (ISACs).

Threat Hunting Techniques: Formulating hypotheses, establishing a baseline, discovering data anomalies, active defense methodologies (honeypots/honeynets).

Domain 2.0: Vulnerability Management (30%)

This domain covers setting up vulnerability assessment programs, interpreting automated tool outputs, and executing strategic mitigation strategies.

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2.1 Explain the importance of vulnerability management processes.

Vulnerability Scanning Strategies: Internal vs. external scanning, agent vs. agentless configurations, credentialed vs. non-credentialed scans, passive vs. active scanning.

Asset Discovery & Fingerprinting: Network mapping scans, OS identification, and active asset inventories.

Special Considerations: Scheduling constraints, performance impacts, asset sensitivity levels, network segmentation boundaries, and compliance/regulatory scan requirements.

Scanning Frameworks & Industry Standards: PCI DSS requirements, CIS Benchmarks, OWASP Top 10, and ISO 27000 series standards.

2.2 Given a scenario, analyze output from vulnerability assessment tools.

Network Mapping & Reconnaissance: Nmap, Angry IP Scanner, Maltego.

Web Application Vulnerability Scanners: Burp Suite, OWASP ZAP, Nikto.

Host/Infrastructure Vulnerability Scanners: Nessus, OpenVAS.

Cloud Infrastructure Assessment Tools: Scout Suite, Prowler, Pacu.

Analysis Techniques: Identifying false positives vs. false negatives, identifying configuration errors, and uncovering outdated software/firmware versions.

2.3 Given a scenario, prioritize vulnerabilities and recommend mitigation controls.

Vulnerability Prioritization Matrix: Common Vulnerability Scoring System (CVSS) metrics (base, temporal, environmental scores), exploitability index, threat landscape trends, asset criticality/value, and zero-day threat analysis.

Mitigation Controls (Defense-in-Depth): Recommending patches, compensating controls, input validation, output encoding, secure session management, parameterized queries, and network micro-segmentation.

Vulnerability Lifecycle Actions: Remediation, mitigation, risk acceptance, exception tracking, establishing maintenance windows, and operating within Service Level Objectives (SLOs).

Domain 3.0: Incident Response and Management (20%)

This domain tests your tactical ability to react to real-time breaches, contain threats, and properly manage the lifecycle of an incident.

3.1 Explain attack environments and frameworks.

Attack Methodologies & Frameworks: MITRE ATT&CK framework, Cyber Kill Chain, Unified Incident Stage Models.

Threat Actor TTPs: Privilege escalation techniques, lateral movement across a network, establishing persistence, and executing data exfiltration.

3.2 Given a scenario, perform incident response activities.

The Incident Response Lifecycle: Preparation, Detection and Analysis, Containment, Eradication, Recovery, and Post-Incident Activity (Lessons Learned).

Evidence Acquisition & Forensics: Chain of custody maintenance, data preservation, memory/storage acquisitions, validating data integrity (hashing), and legal hold processing.

Containment & Eradication Procedures: Host isolation, network segmentation adjustment, disabling compromised accounts, firewall rule modifications, system re-imaging, and applying compensating controls.

Domain 4.0: Reporting and Communication (17%)

This domain focuses on your ability to synthesize technical data into actionable business and security intelligence for stakeholders.

4.1 Given a scenario, interpret data to provide explanations of security findings.

Vulnerability & Risk Summaries: Correlating affected hosts, determining true risk scores, documenting remediation timelines, and outlining mitigation requirements to prevent recurrence.

Key Performance Indicators (KPIs): Measuring Mean Time to Detect (MTTD), Mean Time to Respond/Remediate (MTTR), and tracking patch compliance metrics.

4.2 Given a scenario, describe information security reporting and communication procedures.

Reporting Architecture: Creating an Executive Summary for leadership versus detailed Technical Reports for engineers. Covering the Who, What, When, Where, and Why of an incident.

Stakeholder Management & Communications: Interfacing with corporate Legal, Public Relations (PR), media relations, and direct customer notifications.

Regulatory & Compliance Obligations: Reporting to specific regulatory bodies, coordinating with external managed service providers (MSSPs), and reporting to Law Enforcement (e.g., CISA, FBI).

Study Strategy Tip for CS0-003

Unlike its predecessor (CS0-002), the CS0-003 exam places a massive emphasis on Cloud Security Operations and Automation/Scripting interpretation. When studying, prioritize hands-on labs involving SIEM query interpretation, analyzing regex/log files from cloud resources (AWS CloudTrail, Azure Monitor), and reading basic Python/Bash automation code blocks.