comptia-cysa

Provides CompTIA CySA+ CS0-004 exam guidance across security operations, vulnerability management, and incident response domains.

Updated Jun 5, 2026
One-click install
npx skills add https://github.com/yogiex/opencode-cyber-security-skills --skill comptia-cysa-yogiex
Or copy as Structured Prompt for Agent▼
Please help me install this Agent Skill.
Skill: comptia-cysa
Source: https://github.com/yogiex/opencode-cyber-security-skills/tree/main/skills/comptia-cysa
Command: npx skills add https://github.com/yogiex/opencode-cyber-security-skills --skill comptia-cysa-yogiex

SYSTEM DOCUMENTATION & REQUIREMENTS

💡 This Skill includes references (resource) components.

What problem does it solve? Preparing for the CompTIA CySA+ (CS0-004) certification requires mastering four large domains of security analyst knowledge, and candidates often lack a structured, exam-weighted reference covering logging, threat hunting, vulnerability prioritization, incident response, and reporting. ## Core Features & Use Cases - Domain-Structured References: Detailed guides for all four exam domains — Security Operations (34%), Vulnerability Management (26%), Incident Response (24%), and Reporting & Communication (16%). - Tools & Frameworks Mapping: 15 tool categories (SIEM, EDR, scanners, SOAR) and 12 frameworks (MITRE ATT&CK, Kill Chain, NIST, CIS) mapped to exam domains. - Exam Strategy Guidance: PBQ and multiple-choice strategies, time management, and common gotchas like CVSS vs EPSS prioritization and TLP misuse. - Use Case: A SOC analyst preparing for CySA+ asks how to prioritize vulnerabilities; the skill explains combining CVSS v3.1 base scores with EPSS probability and business context, citing the Domain 2 reference. ## Quick Start Ask the agent to explain CySA+ Domain 3 incident response phases and evidence handling using the comptia-cysa skill.

Frequently Asked Questions about comptia-cysa

High-intent search queries and answers about installing and using this skill.

FAQPage Schema
How do I prepare for the CompTIA CySA+ CS0-004 exam?▼

Study the four weighted domains: Security Operations (34%), Vulnerability Management (26%), Incident Response (24%), and Reporting & Communication (16%). The exam has up to 85 questions in 165 minutes with a passing score of 750/900, including performance-based questions.

How should I prioritize vulnerabilities using CVSS and EPSS?▼

CVSS v3.1 measures technical severity (0-10) but not exploitation probability, so combine it with EPSS (0-100% likelihood) and business context. A CVSS 7 with 90% EPSS may outrank a CVSS 10 with 0.01% EPSS.

What is the difference between credentialed and non-credentialed vulnerability scanning?▼

Credentialed scans authenticate to target systems, producing accurate results with fewer false positives, while non-credentialed scans miss many vulnerabilities and require manual validation. CySA+ emphasizes credentialed scanning for accuracy.

What tools are covered for CySA+ security operations?▼

The reference covers 15 tool categories including Wireshark and tcpdump for packet analysis, Snort and Suricata for IDS/IPS, Nessus and OpenVAS for vulnerability scanning, Splunk and ELK for SIEM, and CrowdStrike for EDR.

Why is chain of custody important in incident response?▼

Chain of custody documents every evidence transfer with name, date, purpose, and reason, making evidence legally admissible. Without it, forensic evidence cannot be used, and write blockers plus SHA256 hashing are required during acquisition.

Does this skill include practice exam questions?▼

No, it provides study references, domain guides, exam strategies, and gotchas rather than practice questions. It covers PBQ and multiple-choice strategies plus time management tips for the 165-minute exam.