claude-red is a library of structured skills that give Claude specialized offensive-security methods for areas such as web vulnerabilities, shellcode, exploit development, and identity systems. It is intended for authorized red-team work, bug-bounty triage, security research, CTF preparation, and operator training. Its catalogue contains the project's skills for loading these security specializations into Claude.
Getting it into your agent
One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.
npx skills add SnailSploit/Claude-Red --skill offensive-c2-frameworksgit clone --depth 1 https://github.com/SnailSploit/Claude-RedWrote this? Show the measurements
A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.
[](https://agentmods.dev/skills/snailsploit/claude-red/offensive-c2-frameworks)<a href="https://agentmods.dev/skills/snailsploit/claude-red/offensive-c2-frameworks"><img src="https://agentmods.dev/badge/skills/snailsploit/claude-red/offensive-c2-frameworks/github.svg" alt="Measured on agentmods" height="20"></a>Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.
<a href="https://agentmods.dev/skills/snailsploit/claude-red/offensive-c2-frameworks"><img src="https://agentmods.dev/badge/skills/snailsploit/claude-red/offensive-c2-frameworks.svg" alt="Reviewed on agentmods" width="80" height="20"></a>- NVIDIA SkillSpector warn
SkillSpector: 2 findings, up to critical
These are SkillSpector’s own severities. On a checked sample its high-severity flags on skills were ~96% false positives — a documented command, a public API, a “never do X” rule — so we show them as a caution to read, not a verdict. Why →
- critical YARA Match · line 3 YARA rule matched a known malware signature (reverse shell, backdoor, ransomware, C2 framework, or info stealer).Fix: Remove the malware payload or compromised file entirely. Investigate how it entered the skill and audit all other artifacts for additional indicators of compromise.
- high YARA Match · line 368 YARA rule matched a hack tool or exploit indicator (offensive tools, reconnaissance, privilege escalation, or exploit frameworks).Fix: Remove offensive tool references and exploit code. Legitimate agent skills should not contain penetration testing tools, exploit frameworks, or reconnaissance utilities.
What it costs to keep this loaded
Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.
| Model | Per session | Once invoked |
|---|---|---|
| Fable 5.1 | $0.00250 | $0.05611 |
| Opus 5.5 | $0.00100 | $0.02244 |
| Sonnet 5.5 | $0.00050 | $0.01122 |
| Haiku 4.5 | $0.00025 | $0.00561 |
Grade A, and why
offensive-c2-frameworks scanned grade A with 1 finding against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 1mo ago.
A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.
Makes network callslowCapability
Not a fault in itself. Listed so you know the mod talks to something, and to what.
RewriteCond %{HTTP_USER_AGENT} (curl|wget|python|scanner|nikto|nmap) [NC] Copies of this mod
1 near-identical copy found in the catalogue:
- offensive-c2-frameworks — 89% identical, 42 lines differ
How it starts
The opening of the file, as written. The whole thing — 597 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Offensive C2 Frameworks
Command and Control is the backbone of any sustained red team engagement. Your C2 framework manages implant communication, task distribution, post-exploitation, and lateral movement coordination. Selecting and configuring the right framework -- and layering proper infrastructure around it -- determines whether your operation survives the first 48 hours or burns within minutes of initial access.
This skill covers the major C2 frameworks you encounter in professional red teaming, their configuration for operational security, the infrastructure patterns that protect your backend servers, and the tradecraft decisions that separate detectable operations from resilient ones. You are expected to understand not just how to deploy these tools, but why specific configuration choices matter against modern EDR and network monitoring.
Quick Workflow
- Define your engagement's network constraints -- identify allowed egress protocols, proxy requirements, and monitoring posture.
- Select a primary C2 framework and transport based on target environment restrictions.
- Build redirector infrastructure between your implants and your team server -- never expose the team server directly.
- Configure communication profiles to mimic legitimate traffic patterns for the target organization.
- Generate implants with appropriate sleep intervals, jitter, and kill dates.
- Establish primary and fallback C2 channels using different transports and infrastructure.
- Monitor your C2 traffic against detection signatures before deploying to production targets.
Cobalt Strike
Cobalt Strike remains the most widely deployed commercial C2 framework. Its strength lies in malleable C2 profiles, Beacon flexibility, and a mature post-exploitation toolkit. You configure it for stealth through profile customization, sleep management, and BOF execution.
Malleable C2 Profiles
Malleable profiles define how Beacon communicates -- HTTP headers, URI paths, data encoding, and TLS parameters. A well-crafted profile mimics a specific legitimate application.
What this file has done since we first saw it
Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.
- 1mo ago First seen · 597 lines · 250 tokens per session scan A dc1cfeee684e
offensive-c2-frameworks is a skill published in the GitHub repository SnailSploit/Claude-Red (7,620 stars, last pushed 8d ago), licensed MIT. It adds 250 tokens to every session and 5,611 once invoked, about $0.0010 per session on Opus 5.5. A static security scan graded it A with 1 finding (makes network calls). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.
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