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⚠️ Community Project — This is an independent, community-created project. Not affiliated with Anthropic PBC.

Give any AI agent the security skills of a senior analyst

A junior analyst knows which Volatility3 plugin to run on a suspicious memory dump, which Sigma rules catch Kerberoasting, and how to scope a cloud breach across three providers. Your AI agent doesn't — unless you give it these skills.

This repo contains 754 structured cybersecurity skills spanning 26 security domains, each following the agentskills.io open standard. Every skill is mapped to five industry frameworks — MITRE ATT&CK, NIST CSF 2.0, MITRE ATLAS, MITRE D3FEND, and NIST AI RMF — making this the only open-source skills library with unified cross-framework coverage. Clone it, point your agent at it, and your next security investigation gets expert-level guidance in seconds.

Five frameworks, one skill library

No other open-source skills library maps every skill to all five frameworks. One skill, five compliance checkboxes.

Framework	Version	Scope in this repo	What it maps
MITRE ATT&CK	v18	14 tactics · 200+ techniques	Adversary behaviors and TTPs
NIST CSF 2.0	2.0	6 functions · 22 categories	Organizational security posture
MITRE ATLAS	v5.4	16 tactics · 84 techniques	AI/ML adversarial threats
MITRE D3FEND	v1.3	7 categories · 267 techniques	Defensive countermeasures
NIST AI RMF	1.0	4 functions · 72 subcategories	AI risk management

Example — a single skill maps across all five:

Skill	ATT&CK	NIST CSF	ATLAS	D3FEND	AI RMF
analyzing-network-traffic-of-malware	T1071	DE.CM	AML.T0047	D3-NTA	MEASURE-2.6

Quick start

# Option 1: npx (recommended)
npx skills add mukul975/Anthropic-Cybersecurity-Skills

# Option 2: Git clone
git clone https://github.com/mukul975/Anthropic-Cybersecurity-Skills.git
cd Anthropic-Cybersecurity-Skills

Works immediately with Claude Code, GitHub Copilot, OpenAI Codex CLI, Cursor, Gemini CLI, and any agentskills.io-compatible platform.

🚀 Try it on the Playground

Experience Casky.ai hands-on — no setup required.

→ Launch Playground on Casky.ai

The playground lets you:

• Run live cybersecurity skill exercises against real targets
• See AI agents execute structured skills in real time
• Explore MITRE ATT&CK mapped workflows interactively
• Test threat hunting, DFIR, and penetration testing scenarios

No installation. No configuration. Just open and start.

Why this exists

The cybersecurity workforce gap hit 4.8 million unfilled roles globally in 2024 (ISC2). AI agents can help close that gap — but only if they have structured domain knowledge to work from. Today's agents can write code and search the web, but they lack the practitioner playbooks that turn a generic LLM into a capable security analyst.

Existing security tool repos give you wordlists, payloads, or exploit code. None of them give an AI agent the structured decision-making workflow a senior analyst follows: when to use each technique, what prerequisites to check, how to execute step-by-step, and how to verify results. That is the gap this project fills.

Anthropic Cybersecurity Skills is not a collection of scripts or checklists. It is an AI-native knowledge base built from the ground up for the agentskills.io standard — YAML frontmatter for sub-second discovery, structured Markdown for step-by-step execution, and reference files for deep technical context. Every skill encodes real practitioner workflows, not generated summaries.

What's inside — 26 security domains

Domain	Skills	Key capabilities
Cloud Security	60	AWS, Azure, GCP hardening · CSPM · cloud forensics
Threat Hunting	55	Hypothesis-driven hunts · LOTL detection · behavioral analytics
Threat Intelligence	50	STIX/TAXII · MISP · feed integration · actor profiling
Web Application Security	42	OWASP Top 10 · SQLi · XSS · SSRF · deserialization
Network Security	40	IDS/IPS · firewall rules · VLAN segmentation · traffic analysis
Malware Analysis	39	Static/dynamic analysis · reverse engineering · sandboxing
Digital Forensics	37	Disk imaging · memory forensics · timeline reconstruction
Security Operations	36	SIEM correlation · log analysis · alert triage
Identity & Access Management	35	IAM policies · PAM · zero trust identity · Okta · SailPoint
SOC Operations	33	Playbooks · escalation workflows · metrics · tabletop exercises
Container Security	30	K8s RBAC · image scanning · Falco · container forensics
OT/ICS Security	28	Modbus · DNP3 · IEC 62443 · historian defense · SCADA
API Security	28	GraphQL · REST · OWASP API Top 10 · WAF bypass
Vulnerability Management	25	Nessus · scanning workflows · patch prioritization · CVSS
Incident Response	25	Breach containment · ransomware response · IR playbooks
Red Teaming	24	Full-scope engagements · AD attacks · phishing simulation
Penetration Testing	23	Network · web · cloud · mobile · wireless pentesting
Endpoint Security	17	EDR · LOTL detection · fileless malware · persistence hunting
DevSecOps	17	CI/CD security · code signing · Terraform auditing
Phishing Defense	16	Email authentication · BEC detection · phishing IR
Cryptography	14	TLS · Ed25519 · certificate transparency · key management
Zero Trust Architecture	13	BeyondCorp · CISA maturity model · microsegmentation
Mobile Security	12	Android/iOS analysis · mobile pentesting · MDM forensics
Ransomware Defense	7	Precursor detection · response · recovery · encryption analysis
Compliance & Governance	5	CIS benchmarks · SOC 2 · regulatory frameworks
Deception Technology	2	Honeytokens · breach detection canaries

How AI agents use these skills

Each skill costs ~30 tokens to scan (frontmatter only) and 500–2,000 tokens to fully load (complete workflow). This progressive disclosure architecture lets agents search all 754 skills in a single pass without blowing context windows.

User prompt: "Analyze this memory dump for signs of credential theft"

Agent's internal process:

  1. Scans 754 skill frontmatters (~30 tokens each)
     → identifies 12 relevant skills by matching tags, description, domain

  2. Loads top 3 matches:
     • performing-memory-forensics-with-volatility3
     • hunting-for-credential-dumping-lsass
     • analyzing-windows-event-logs-for-credential-access

  3. Executes the structured Workflow section step-by-step
     → runs Volatility3 plugins, checks LSASS access patterns,
        correlates with event log evidence

  4. Validates results using the Verification section
     → confirms IOCs, maps findings to ATT&CK T1003 (Credential Dumping)

Without these skills, the agent guesses at tool commands and misses critical steps. With them, it follows the same playbook a senior DFIR analyst would use.

Skill anatomy

Every skill follows a consistent directory structure:

skills/performing-memory-forensics-with-volatility3/
├── SKILL.md              ← Skill definition (YAML frontmatter + Markdown body)
├── references/
│   ├── standards.md      ← MITRE ATT&CK, ATLAS, D3FEND, NIST mappings
│   └── workflows.md      ← Deep technical procedure reference
├── scripts/
│   └── process.py        ← Working helper scripts
└── assets/
    └── template.md       ← Filled-in checklists and report templates

YAML frontmatter (real example)

---
name: performing-memory-forensics-with-volatility3
description: >-
  Analyze memory dumps to extract running processes, network connections,
  injected code, and malware artifacts using the Volatility3 framework.
domain: cybersecurity
subdomain: digital-forensics
tags: [forensics, memory-analysis, volatility3, incident-response, dfir]
atlas_techniques: [AML.T0047]
d3fend_techniques: [D3-MA, D3-PSMD]
nist_ai_rmf: [MEASURE-2.6]
nist_csf: [DE.CM-01, RS.AN-03]
version: "1.2"
author: mukul975
license: Apache-2.0
---

Markdown body sections

## When to Use
Trigger conditions — when should an AI agent activate this skill?

## Prerequisites
Required tools, access levels, and environment setup.

## Workflow
Step-by-step execution guide with specific commands and decision points.

## Verification
How to confirm the skill was executed successfully.

Frontmatter fields: name (kebab-case, 1–64 chars), description (keyword-rich for agent discovery), domain, subdomain, tags, atlas_techniques (MITRE ATLAS IDs), d3fend_techniques (MITRE D3FEND IDs), nist_ai_rmf (NIST AI RMF references), nist_csf (NIST CSF 2.0 categories). MITRE ATT&CK technique mappings are documented in each skill's references/standards.md file and in the ATT&CK Navigator layer included with releases.

📊 MITRE ATT&CK Enterprise coverage — all 14 tactics

 

Tactic	ID	Coverage	Key skills
Reconnaissance	TA0043	Strong	OSINT, subdomain enumeration, DNS recon
Resource Development	TA0042	Moderate	Phishing infrastructure, C2 setup detection
Initial Access	TA0001	Strong	Phishing simulation, exploit detection, forced browsing
Execution	TA0002	Strong	PowerShell analysis, fileless malware, script block logging
Persistence	TA0003	Strong	Scheduled tasks, registry, service accounts, LOTL
Privilege Escalation	TA0004	Strong	Kerberoasting, AD attacks, cloud privilege escalation
Defense Evasion	TA0005	Strong	Obfuscation, rootkit analysis, evasion detection
Credential Access	TA0006	Strong	Mimikatz detection, pass-the-hash, credential dumping
Discovery	TA0007	Moderate	BloodHound, AD enumeration, network scanning
Lateral Movement	TA0008	Strong	SMB exploits, lateral movement detection with Splunk
Collection	TA0009	Moderate	Email forensics, data staging detection
Command and Control	TA0011	Strong	C2 beaconing, DNS tunneling, Cobalt Strike analysis
Exfiltration	TA0010	Strong	DNS exfiltration, DLP controls, data loss detection
Impact	TA0040	Strong	Ransomware defense, encryption analysis, recovery

An ATT&CK Navigator layer file is included in the v1.0.0 release assets for visual coverage mapping.

Note: ATT&CK v19 lands April 28, 2026 — splitting Defense Evasion (TA0005) into two new tactics: Stealth and Impair Defenses. Skill mappings will be updated in a forthcoming release.

📊 NIST CSF 2.0 alignment — all 6 functions

 

Function	Skills	Examples
Govern (GV)	30+	Risk strategy, policy frameworks, roles & responsibilities
Identify (ID)	120+	Asset discovery, threat landscape assessment, risk analysis
Protect (PR)	150+	IAM hardening, WAF rules, zero trust, encryption
Detect (DE)	200+	Threat hunting, SIEM correlation, anomaly detection
Respond (RS)	160+	Incident response, forensics, breach containment
Recover (RC)	40+	Ransomware recovery, BCP, disaster recovery

NIST CSF 2.0 (February 2024) added the Govern function and expanded scope from critical infrastructure to all organizations. Skill mappings align to all 22 categories and reference 106 subcategories.

📊 Framework deep dive — ATLAS, D3FEND, AI RMF

 

MITRE ATLAS v5.4 — AI/ML adversarial threats

ATLAS maps adversarial tactics, techniques, and case studies specific to AI and machine learning systems. Version 5.4 covers 16 tactics and 84 techniques including agentic AI attack vectors added in late 2025: AI agent context poisoning, tool invocation abuse, MCP server compromises, and malicious agent deployment. Skills mapped to ATLAS help agents identify and defend against threats to ML pipelines, model weights, inference APIs, and autonomous workflows.

MITRE D3FEND v1.3 — Defensive countermeasures

D3FEND is an NSA-funded knowledge graph of 267 defensive techniques organized across 7 tactical categories: Model, Harden, Detect, Isolate, Deceive, Evict, and Restore. Built on OWL 2 ontology, it uses a shared Digital Artifact layer to bidirectionally map defensive countermeasures to ATT&CK offensive techniques. Skills tagged with D3FEND identifiers let agents recommend specific countermeasures for detected threats.

NIST AI RMF 1.0 + GenAI Profile (AI 600-1)

The AI Risk Management Framework defines 4 core functions — Govern, Map, Measure, Manage — with 72 subcategories for trustworthy AI development. The GenAI Profile (AI 600-1, July 2024) adds 12 risk categories specific to generative AI, from confabulation and data privacy to prompt injection and supply chain risks. Colorado's AI Act (effective February 2026) provides a legal safe harbor for organizations complying with NIST AI RMF, making these mappings directly relevant to regulatory compliance.

Compatible platforms

AI code assistants Claude Code (Anthropic) · GitHub Copilot (Microsoft) · Cursor · Windsurf · Cline · Aider · Continue · Roo Code · Amazon Q Developer · Tabnine · Sourcegraph Cody · JetBrains AI

CLI agents OpenAI Codex CLI · Gemini CLI (Google)

Autonomous agents Devin · Replit Agent · SWE-agent · OpenHands

Agent frameworks & SDKs LangChain · CrewAI · AutoGen · Semantic Kernel · Haystack · Vercel AI SDK · Any MCP-compatible agent

All platforms that support the agentskills.io standard can load these skills with zero configuration.

What people are saying

"A database of real, organized security skills that any AI agent can plug into and use. Not tutorials. Not blog posts." — Hasan Toor (@hasantoxr), AI/tech creator

"This is not a random collection of security scripts. It's a structured operational knowledge base designed for AI-driven security workflows." — fazal-sec, Medium

Featured in

Where	Type	Link
awesome-agent-skills	Awesome List (1,000+ skills index)	VoltAgent/awesome-agent-skills
awesome-ai-security	Awesome List (AI security tools)	ottosulin/awesome-ai-security
awesome-codex-cli	Awesome List (Codex CLI resources)	RoggeOhta/awesome-codex-cli
SkillsLLM	Skills directory & marketplace	skillsllm.com/skill/anthropic-cybersecurity-skills
Openflows	Signal analysis & tracking	openflows.org
NeverSight skills_feed	Automated skills index	NeverSight/skills_feed

Star history

Releases

Version	Date	Highlights
v1.0.0	March 11, 2026	734 skills · 26 domains · MITRE ATT&CK + NIST CSF 2.0 mapping · ATT&CK Navigator layer

Skills have continued to grow on main since v1.0.0 — the library now contains 754 skills with 5-framework mapping (MITRE ATLAS, D3FEND, and NIST AI RMF added post-release). Check Releases for the latest tagged version.

Contributing

This project grows through community contributions. Here is how to get involved:

Add a new skill — Domains like Deception Technology (2 skills) and Compliance & Governance (5 skills) need the most help. Follow the template in CONTRIBUTING.md and submit a PR with the title Add skill: your-skill-name.

Improve existing skills — Add framework mappings, fix workflows, update tool references, or contribute scripts and templates.

Report issues — Found an inaccurate procedure or broken script? Open an issue.

Every PR is reviewed for technical accuracy and agentskills.io standard compliance within 48 hours. Check good first issues for a starting point.

This project follows the Contributor Covenant. By participating, you agree to uphold this code.

Community

💬 Discussions — Questions, ideas, and roadmap conversations 🐛 Issues — Bug reports and feature requests 🔒 Security Policy — Responsible disclosure process (48-hour acknowledgment)

Citation

If you use this project in research or publications:

@software{anthropic_cybersecurity_skills,
  author       = {Jangra, Mahipal},
  title        = {Anthropic Cybersecurity Skills},
  year         = {2026},
  url          = {https://github.com/mukul975/Anthropic-Cybersecurity-Skills},
  license      = {Apache-2.0},
  note         = {754 structured cybersecurity skills for AI agents,
                  mapped to MITRE ATT\&CK, NIST CSF 2.0, MITRE ATLAS,
                  MITRE D3FEND, and NIST AI RMF}
}

License

This project is licensed under the Apache License 2.0. You are free to use, modify, and distribute these skills in both personal and commercial projects.

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