hunt-auth

hunt-auth is a skill for Claude Code, Codex from Encod3d-Sec/TORCH. It costs 55 tokens per session (2,342 once invoked), scanned A, original, MIT.

A security-testing guide for finding ways attackers could bypass login controls or take over accounts, including older login protocols, password resets, sessions, tokens, and single sign-on.

In plain words
What is it for?
It helps test legacy authentication endpoints, password-reset flows, session handling, multi-factor authentication, web tokens, and SAML-based sign-in.
Why use it?
It gives researchers a structured set of areas to check instead of relying only on the visible login form.

Skill for Claude CodeCodex

Written for no agent in particular: nothing here depends on one.

Install

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.

agentmods
npx agentmods add skills/encod3d-sec/torch/hunt-auth
Any agent
npx skills add Encod3d-Sec/TORCH --skill hunt-auth
Clone the repo
git clone --depth 1 https://github.com/Encod3d-Sec/TORCH

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 hunt-auth

README.md
[![agentmods](https://agentmods.dev/badge/skills/encod3d-sec/torch/hunt-auth.svg)](https://agentmods.dev/skills/encod3d-sec/torch/hunt-auth)
Your own site
<a href="https://agentmods.dev/skills/encod3d-sec/torch/hunt-auth"><img src="https://agentmods.dev/badge/skills/encod3d-sec/torch/hunt-auth.svg" alt="Measured on agentmods" height="20"></a>
Per session 55 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 2,342 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. Scan, not verified.
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 $0.00055 $0.02342
Opus 5 $0.00028 $0.01171
Sonnet 5 $0.00011 $0.00468
Haiku 4.5 $0.00006 $0.00234

Measured 6d ago against content hash b6b90282dc4a, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-06, from the pricing page.

Security

Grade A, and why

hunt-auth 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 6d 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.

skills/hunt/hunt-auth/SKILL.md · 124 lines

How it starts

The opening of the file, as written. The whole thing — 124 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Hunt: Auth Bypass & Account Takeover

Assumes hunt-core for the scope gate, two-account rule, confirmation gate, enumeration limits, stop conditions, wiki protocol, FIND output, and Deadends. Do not re-derive any of that here.

Wiki

qmd_query "authentication bypass account takeover password reset poisoning session fixation legacy protocol" via wiki-search MCP

Hub: [[web-moc]] (live index). Primary page: [[authentication-attacks]]. Payload arsenal: wiki/payloads/{auth-bypass,jwt,oauth-saml,session,mfa-bypass,crypto}.md. Anchors: [[session-management-attacks]], [[mfa-bypass]].

Attack surface (ranked)

Probe in this order; a higher entry is more often unguarded than a cleverer payload on the main form is likely to land.

  1. Legacy protocol endpoints (matrix below) - a second door to the same credential store, frequently with no rate limit, MFA, or CAPTCHA. Probe first on any custom/branded login.
  2. Password reset flows - host-header poisoning, token in Referer, token reuse/expiry, reset that does not invalidate live sessions.
  3. Session and MFA - fixation, missing rotation on privilege change, MFA-optional endpoints, JWT manipulation.
  4. Read the login form's fields, not just the endpoint. A login that takes username only, no password field is instant ATO - just submit the privileged/target username (custom auth on a CTF/lab app does this constantly). Same for a "just email"/"just token" form with no secret.
  5. Predictable/leaked signing key -> forge as any user. When auth or a "signed message" rests on a per-user key, hunt for a /debug, docs, or /about endpoint (or source) that discloses the key-derivation (deterministic seed like f(username, CONST), nextprime(int(SHA256(seed)))). If the derivation is known, reconstruct the private key offline and forge signatures/sessions/JWTs for admin - no factoring, modulus size irrelevant. Build + oracle-brute steps in [[cryptography-attacks]] ("RSA private key from a known/deterministic seed").

Read the full file on GitHub · 124 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. 6d ago First seen · 124 lines · 55 tokens per session scan A b6b90282dc4a

Subscribe to this mod's changes

hunt-auth is a skill published in the GitHub repository Encod3d-Sec/TORCH (286 stars, last pushed 4d ago), licensed MIT. It adds 55 tokens to every session and 2,342 once invoked, about $0.0003 per session on Opus 5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.

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