active-directory-attack

active-directory-attack is a skill for Claude Code, Codex from jessefmoore/offensive-claude-code. It costs 45 tokens per session (5,366 once invoked), scanned A, original, MIT.

A guide for testing the security of Active Directory, the Windows system used to manage users, computers, permissions, and sign-ins across an organization. It covers common attacks against domain accounts, Kerberos authentication, Windows credentials, and movement between machines.

In plain words
What is it for?
Use it during an authorized internal security test to map hosts and users, find risky permissions, test Kerberos and NTLM weaknesses, investigate lateral movement, and assess domain-level compromise.
Why use it?
It provides an ordered approach for finding attack paths and testing how an attacker could gain higher privileges in a Windows domain. It also identifies tools used for account discovery, credential testing, and domain takeover checks.

Skill for Claude CodeCodex

Written for no agent in particular: nothing here depends on one. Also seen: positional $N argument.

Needs its repository: it runs a file that does not travel with it, so clone the repository first. The line is python3 skills/scripts/ntds_diff.py /tmp/forestA.ntds /tmp/forestB.ntds.

Good fit Use it during an authorized internal security test to map hosts and users, find risky permissions, test Kerberos and NTLM weaknesses, investigate lateral movement, and assess domain-level compromise.

Compare 6 skills from other repositories ↓
Install

Getting it into your agent

It runs from inside its repository, so the clone comes first — what it calls does not travel with the file alone.

Clone the repo
git clone --depth 1 https://github.com/jessefmoore/offensive-claude-code
agentmods
npx agentmods add skills/jessefmoore/offensive-claude-code/active-directory-attack

Made for: Claude Code, Codex.

Wrote 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.

agentmods badge for active-directory-attack

README.md
[![agentmods](https://agentmods.dev/badge/skills/jessefmoore/offensive-claude-code/active-directory-attack/github.svg)](https://agentmods.dev/skills/jessefmoore/offensive-claude-code/active-directory-attack)
Your own site
<a href="https://agentmods.dev/skills/jessefmoore/offensive-claude-code/active-directory-attack"><img src="https://agentmods.dev/badge/skills/jessefmoore/offensive-claude-code/active-directory-attack/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.

agentmods 80×15 button for active-directory-attack

Your own site · 80×15
<a href="https://agentmods.dev/skills/jessefmoore/offensive-claude-code/active-directory-attack"><img src="https://agentmods.dev/badge/skills/jessefmoore/offensive-claude-code/active-directory-attack.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 45 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 5,366 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 1 finding. A grade says what 26 rules found in the file — not that it is safe.
Origin original No closer match found in the catalogue.
Token cost

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.

ModelPer sessionOnce invoked
Fable 5.1 $0.00045 $0.05366
Opus 5.5 $0.00018 $0.02146
Sonnet 5.5 $0.00009 $0.01073
Haiku 4.5 $0.00005 $0.00537

Measured 1mo ago against content hash 2b6861e437e6, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

active-directory-attack 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.

Asks for rootlowPrivilege escalation

A mod that escalates privileges can change anything on the machine, not only the project.

When the engagement Kali has no passwordless sudo (common on shared lab boxes) and the AD realm doesn't resolve via DNS, normal `nxc -k --use-kcache` fails with `[Errno -2] Name or service not known` on the `<REALM>:88`

Downgraded: this mod is about security review, or the phrase is quoted, so it is likely naming the pattern rather than instructing it.

skills/active-directory-attack/SKILL.md · 517 lines

How it starts

The opening of the file, as written. The whole thing — 517 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Active Directory Attacks

When to Activate

  • Attacking Windows domain environments
  • Kerberos exploitation (Kerberoasting, AS-REP roasting, tickets)
  • NTLM relay and lateral movement
  • BloodHound enumeration and attack path discovery
  • Domain privilege escalation and persistence
  • DCSync and credential extraction

Essential Tools

Tool Purpose
BloodHound AD attack path visualization
Impacket Python AD attack suite
Mimikatz Credential extraction
Rubeus Kerberos attacks
NetExec (nxc) Network exploitation — see skills/netexec/SKILL.md for the canonical reference
PowerView AD enumeration
Responder LLMNR/NBT-NS poisoning
Kerbrute User enumeration & password spray

Engagement Spine — Default Playbook (run in order, not just on-demand)

Every authorized internal AD engagement should walk these phases. Each step has a "must-run" check and a callout for the easy-to-miss anti-patterns we've burned ourselves on in past engagements.

Phase 0 — Unauthenticated recon (no creds yet)

# Live-host discovery
nmap -sn <subnet> -oA hosts
nxc smb <subnet>                              # SMB banner sweep, signing posture, NetBIOS names

# LDAP signing + channel binding posture (relay-target detection)
nxc ldap <subnet>                             # banner shows signing:None and channel binding state

# Anonymous SMB + RID brute + password policy disclosure
nxc smb <subnet> -u '' -p '' --shares
nxc smb <dc-ip> -u '' -p '' --pass-pol
nxc smb <dc-ip> -u '' -p '' --rid-brute 10000

# Guest fallback (Critical anti-pattern — often forgotten)
nxc smb <subnet> -u guest -p ''               # Per-host: success here = F08-class Guest fallback
nxc smb <dc-ip> -u guest -p '' --rid-brute 10000   # Guest can enumerate users when fallback is on

# Kerberos user-enum (no preauth → no logon noise)
kerbrute userenum -d <domain> --dc <dc-ip> /usr/share/seclists/Usernames/xato-net-10-million-usernames-dup.txt

Read the full file on GitHub · 517 lines

Changes

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.

  1. 1mo ago First seen · 517 lines · 45 tokens per session scan A 2b6861e437e6

Subscribe to this mod's changes

active-directory-attack is a skill published in the GitHub repository jessefmoore/offensive-claude-code (2 stars, last pushed 1mo ago), licensed MIT. It adds 45 tokens to every session and 5,366 once invoked, about $0.0002 per session on Opus 5.5. A static security scan graded it A with 1 finding (asks for root). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.

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