Two techniques that combine into one of the most reliable domain-compromise chains: force a target (usually a Domain Controller's machine account) to authenticate to a host you control, then relay that authentication to a service that lacks the protection to reject it. No credential cracking involved; you are borrowing a live authentication.
Coercion Ntlm Relay is a community-contributed Claude Code skill in the identity-access sub-category. It ships as a SKILL.md file that Claude Code auto-discovers under ~/.claude/skills/coercion-ntlm-relay/ and loads when your prompt matches the skill's trigger.
When to invoke it: Use when SMB signing is not enforced or LDAP channel binding is missing, and you want to force a privileged machine account to authenticate to your relay and turn that into RBCD, a DCSync-capable ACL grant, or a certificate. Includes the exact Coercer/ntlmrelayx commands, requirements, detection, and remediation.
The Coercion Ntlm Relay Claude Code skill is built for security engineers, penetration testers, DevSecOps practitioners, and development teams hardening codebases and infrastructure. It's part of ClaudSkills (also referred to as Claude Skills or Claude Code Skills) — the open community-curated registry of 196,000+ SKILL.md files for Anthropic's Claude Code agent and the wider Claude ecosystem (Claude API, Claude Agent SDK).
mkdir -p ~/.claude/skills/coercion-ntlm-relay curl -L https://claudskills.com/skills/coercion-ntlm-relay/SKILL.md \ -o ~/.claude/skills/coercion-ntlm-relay/SKILL.md
Or just download SKILL.md directly and drop it into ~/.claude/skills/coercion-ntlm-relay/. Claude Code auto-discovers it on next session.
Skills live at ~/.claude/skills/coercion-ntlm-relay/SKILL.md on macOS/Linux, or %USERPROFILE%\.claude\skills\coercion-ntlm-relay\SKILL.md on Windows. See the full install guide for step-by-step instructions.
Open @claudskills_bot on Telegram, tap Open Desktop App, and the desktop app installs this skill for you. Or share the bot link with a colleague — they get the same one-tap install. Learn more →
The ClaudSkills desktop app installs any skill directly into ~/.claude/skills/ with one click — no terminal required. Pro starts at $9/mo or $149 lifetime.
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SKILL.md from the source repository to ~/.claude/skills/coercion-ntlm-relay/SKILL.md and restart Claude Code. Both flows are detailed at claudskills.com/install/.SKILL.md file that lives under ~/.claude/skills/<name>/ and tells the Claude Code CLI agent how to perform a specific task (instructions, prompts, allowed tools). Skills are auto-discovered at session start. Coercion Ntlm Relay is one of 67,000+ skills indexed in the open ClaudSkills catalog, classified under the Security category. Learn more at /learn/what-is-a-claude-skill/.If you reference this skill in a blog post, paper, or documentation, you can cite it as:
@misc{coercion-ntlm-relay-2026,
author = {ClaudSkills},
title = {Coercion Ntlm Relay [Claude Code skill]},
year = {2026},
publisher = {ClaudSkills},
url = {https://claudskills.com/skills/coercion-ntlm-relay/}
}Grade A · scanned 2026-09-28 — free static scan against the OWASP Agentic Skills Top 10.
The scan flagged 1 of 10 categories (network), including lower-severity patterns. Patterns shown inside code fences are weighted as examples rather than instructions — read the grading methodology for what this does and does not guarantee.
Browse all Security skills in the ClaudSkills registry, or explore these other picks from the same category:
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SKILL.md files, not affiliated with, endorsed by, or sponsored by Anthropic.