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 SecurityTalent/bugskill-ai --skill active-directory-kerberos-attacksgit clone --depth 1 https://github.com/SecurityTalent/bugskill-aiWrote 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/securitytalent/bugskill-ai/active-directory-kerberos-attacks)<a href="https://agentmods.dev/skills/securitytalent/bugskill-ai/active-directory-kerberos-attacks"><img src="https://agentmods.dev/badge/skills/securitytalent/bugskill-ai/active-directory-kerberos-attacks/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/securitytalent/bugskill-ai/active-directory-kerberos-attacks"><img src="https://agentmods.dev/badge/skills/securitytalent/bugskill-ai/active-directory-kerberos-attacks.svg" alt="Reviewed on agentmods" width="80" height="20"></a>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 | $0.00048 | $0.02929 |
| Opus 5.5 | $0.00019 | $0.01172 |
| Sonnet 5.5 | $0.00010 | $0.00586 |
| Haiku 4.5 | $0.00005 | $0.00293 |
Grade A, and why
active-directory-kerberos-attacks scanned grade A with 0 findings 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.
Nothing flagged
None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.
This is a copy
100% identical to active-directory-kerberos-attacks — 0 lines differ, which has more behind it and is treated as the original. This page carries a canonical link to it rather than competing with it.
How it starts
The opening of the file, as written. The whole thing — 312 lines — stays where its author put it; the contents beside it link to each section on GitHub.
SKILL: Kerberos Attack Playbook — Expert AD Attack Guide
AI LOAD INSTRUCTION: Expert Kerberos attack techniques for AD environments. Covers AS-REP roasting, Kerberoasting, golden/silver/diamond/sapphire tickets, delegation attacks, pass-the-ticket, and overpass-the-hash. Base models miss ticket type distinctions, delegation chain nuances, and detection-evasion trade-offs.
0. RELATED ROUTING
Before going deep, consider loading:
- active-directory-acl-abuse for ACL-based AD attacks often chained with Kerberos
- active-directory-certificate-services for ADCS-based persistence (golden certificate)
- ntlm-relay-coercion for NTLM relay attacks that complement Kerberos abuse
- windows-lateral-movement after obtaining tickets for lateral movement
Advanced Reference
Also load KERBEROS_ATTACK_CHAINS.md when you need:
- Multi-step attack chains combining Kerberos with ACL abuse, ADCS, and relay
- End-to-end scenarios from foothold to domain admin
- Chained delegation attack flows
1. KERBEROS AUTHENTICATION PRIMER
Client KDC (DC) Service
│ │ │
│── AS-REQ ────────→│ │ (1) Request TGT with user creds
│←─ AS-REP ─────────│ │ (2) Receive TGT (encrypted with krbtgt hash)
│ │ │
│── TGS-REQ ───────→│ │ (3) Present TGT, request service ticket
│←─ TGS-REP ────────│ │ (4) Receive TGS (encrypted with service hash)
│ │ │
│── AP-REQ ─────────────────────────────→│ (5) Present TGS to service
│←─ AP-REP ──────────────────────────────│ (6) Mutual auth (optional)
2. AS-REP ROASTING
Users with "Do not require Kerberos preauthentication" can be queried for AS-REP without knowing their password.
What ships with it
1 file beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.
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 · 312 lines · 48 tokens per session scan A a9812725edef
active-directory-kerberos-attacks is a skill published in the GitHub repository SecurityTalent/bugskill-ai (13 stars, last pushed 21d ago), licensed MIT. It adds 48 tokens to every session and 2,929 once invoked, about $0.0002 per session on Opus 5.5. A static security scan graded it A with 0 findings. It is 100% identical to active-directory-kerberos-attacks, differing in 0 lines, and is treated as a copy.
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