hunt-ntlm-info

hunt-ntlm-info is a skill for Claude Code, Codex from uphiago/recon-skills. It costs 93 tokens per session (4,592 once invoked), scanned A, original, MIT.

A security-hunting guide for information exposed by NTLM, a Windows authentication protocol, on internet-facing Microsoft servers. The leaked details can reveal internal domain names, computer names, and other network clues.

In plain words
What is it for?
It is for checking IIS, SharePoint, Exchange, Citrix, VMware Horizon, and similar public systems that accept NTLM or Negotiate authentication.
Why use it?
It helps security testers spot reconnaissance data that attackers could use to map an organisation's Windows network and plan further attacks.

Skill for Claude CodeCodex

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

Good fit It is for checking IIS, SharePoint, Exchange, Citrix, VMware Horizon, and similar public systems that accept NTLM or Negotiate authentication.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/uphiago/recon-skills/hunt-ntlm-info
About the project

Recon Skills is a pack of security-testing skills covering reconnaissance, web applications, APIs, authentication, vulnerability validation, cloud infrastructure, and reporting. Security professionals use it for authorized assessments of systems they own or have written permission to test. The catalogue entries are individual skills from the pack.

uphiago/recon-skills · 1,254 stars · on GitHub · hiago.sh

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.

Any agent
npx skills add uphiago/recon-skills --skill hunt-ntlm-info
Clone the repo
git clone --depth 1 https://github.com/uphiago/recon-skills

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-ntlm-info

README.md
[![agentmods](https://agentmods.dev/badge/skills/uphiago/recon-skills/hunt-ntlm-info/github.svg)](https://agentmods.dev/skills/uphiago/recon-skills/hunt-ntlm-info)
Your own site
<a href="https://agentmods.dev/skills/uphiago/recon-skills/hunt-ntlm-info"><img src="https://agentmods.dev/badge/skills/uphiago/recon-skills/hunt-ntlm-info/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 hunt-ntlm-info

Your own site · 80×15
<a href="https://agentmods.dev/skills/uphiago/recon-skills/hunt-ntlm-info"><img src="https://agentmods.dev/badge/skills/uphiago/recon-skills/hunt-ntlm-info.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 93 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 4,592 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. Third-party audits
  • NVIDIA SkillSpector pass 7 Sept 2026
How audits are shown
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 $0.00093 $0.04592
Opus 5 $0.00046 $0.02296
Sonnet 5 $0.00019 $0.00918
Haiku 4.5 $0.00009 $0.00459

Measured 8d ago against content hash 6b3b7bb58419, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-11, from the pricing page.

Security

Grade A, and why

hunt-ntlm-info 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 8d 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.

3. **Use a keep-alive raw socket, not Python requests / curl one-shot.** Most HTTP libraries close the connection between the Type-1 send and Type-2 reception. Use one of:
redteam/hunt-ntlm-info/SKILL.md · 307 lines

How it starts

The opening of the file, as written. The whole thing — 307 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Crown Jewel Targets

NTLM info disclosure is a Medium-severity finding when chained to context — the leak itself is intentional protocol behavior (RFC-compliant NTLMSSP challenge), but on internet-exposed enterprise infrastructure it provides exact reconnaissance for the next stage of an attack. Highest-value targets:

  • Internet-reachable IIS / SharePoint / Exchange / OWA with dual-auth (Forms + NTLM, or NTLM + Kerberos)
  • Citrix NetScaler / VMware Horizon View internet-facing gateways with NTLM-backed AD auth
  • Lync / Skype for Business / Teams On-Prem edge servers
  • WSUS / Windows Update Services with NTLM-protected admin paths
  • CIFS-style fileshare proxies (HCL Sametime, IBM Notes Domino) that proxy NTLM
  • Legacy SharePoint farms that left NTLM enabled on the public-zone IIS binding

What makes this pay:

  • Internal AD domain disclosure (parent-forest mapping, e.g. customer.parent-corp.example → tenant inside corporate-AD tree)
  • Default-Windows-hostname disclosure (WIN-XXXXXXXXXXX pattern signals rushed provisioning → likely default service-account passwords)
  • Timestamp leak (used in NTLMv2 hash cracking acceleration)
  • Direct attack-map enrichment for credential spraying combined with hunt-auth-bypass Legacy-Protocol Matrix

Attack Surface Signals

Response headers signaling NTLM availability:

WWW-Authenticate: NTLM
WWW-Authenticate: Negotiate
WWW-Authenticate: NTLM, Negotiate
WWW-Authenticate: Negotiate, NTLM

URL patterns where NTLM is commonly exposed:

/_api/web/CurrentUser                  (SharePoint REST)
/_vti_bin/*.asmx                       (SharePoint legacy SOAP)
/EWS/Exchange.asmx                     (Exchange Web Services)
/Autodiscover/Autodiscover.xml         (Exchange autodiscover)
/owa/                                  (Outlook Web App)
/Microsoft-Server-ActiveSync           (ActiveSync)
/PowerShell                            (Exchange Mgmt Shell over HTTPS)
/api/v3/                               (TeamCity, Atlassian)
/wsus/                                 (Windows Server Update Services)
/manager/html                          (some Tomcat behind IIS)
/iisstart.htm                          (default IIS, sometimes reveals NTLM upstream)

Read the full file on GitHub · 307 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. 8d ago First seen · 307 lines · 93 tokens per session scan A 6b3b7bb58419

Subscribe to this mod's changes

hunt-ntlm-info is a skill published in the GitHub repository uphiago/recon-skills (1,254 stars, last pushed 10d ago), licensed MIT. It adds 93 tokens to every session and 4,592 once invoked, about $0.0005 per session on Opus 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 2026-09-03.

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