entra-enum

entra-enum is a skill for Claude Code from PurpleAILAB/Decepticon. It costs 65 tokens per session (2,181 once invoked), scanned A, original, Apache-2.0.

A reconnaissance guide for Microsoft Entra ID, the cloud identity service behind Microsoft 365. It covers finding a tenant, identifying sign-in and federation details, checking account clues, and reviewing authentication protections.

In plain words
What is it for?
Mapping Entra tenants, checking Microsoft 365 sign-in behaviour, identifying federated identity providers, and reviewing authentication posture.
Why use it?
It helps security testers understand an organisation's identity setup before attempting authenticated testing. This can reveal how sign-ins, federation, multifactor authentication, and access policies are configured.

Skill for Claude Code

Written for Claude Code: allowed-tools in frontmatter. Also seen: positional $N argument.

Good fit Mapping Entra tenants, checking Microsoft 365 sign-in behaviour, identifying federated identity providers, and reviewing authentication posture.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/purpleailab/decepticon/entra-enum
About the project

Decepticon is an autonomous red-team agent that coordinates AI agents, security tools, sandboxes, and supporting services for authorized cybersecurity assessments. Security researchers and red teams can run it through its Docker stack, cloud service, command-line interface, or Python SDK, with the catalogue entries representing its available skills.

PurpleAILAB/Decepticon · 5,482 stars · on GitHub · decepticon.red

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 PurpleAILAB/Decepticon --skill entra-enum
Clone the repo
git clone --depth 1 https://github.com/PurpleAILAB/Decepticon

Made for: Claude Code.

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 entra-enum

README.md
[![agentmods](https://agentmods.dev/badge/skills/purpleailab/decepticon/entra-enum/github.svg)](https://agentmods.dev/skills/purpleailab/decepticon/entra-enum)
Your own site
<a href="https://agentmods.dev/skills/purpleailab/decepticon/entra-enum"><img src="https://agentmods.dev/badge/skills/purpleailab/decepticon/entra-enum/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 entra-enum

Your own site · 80×15
<a href="https://agentmods.dev/skills/purpleailab/decepticon/entra-enum"><img src="https://agentmods.dev/badge/skills/purpleailab/decepticon/entra-enum.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 65 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 2,181 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 warn 7 Sept 2026
SkillSpector: 5 findings, up to high

These are SkillSpector’s own severities. On a checked sample its high-severity flags on skills were ~96% false positives — a documented command, a public API, a “never do X” rule — so we show them as a caution to read, not a verdict. Why →

  • high YARA Match · line 37
    YARA rule matched a hack tool or exploit indicator (offensive tools, reconnaissance, privilege escalation, or exploit frameworks).
    Fix: Remove offensive tool references and exploit code. Legitimate agent skills should not contain penetration testing tools, exploit frameworks, or reconnaissance utilities.
  • medium Data Exfiltration · line 24
    Data is being sent to an external URL. This could be legitimate telemetry or data exfiltration. Manual review is recommended.
    Fix: Verify the destination URL is trusted and necessary. Remove or replace with documented APIs. Ensure no secrets, tokens, or PII are transmitted.
  • medium Data Exfiltration · line 52
    Data is being sent to an external URL. This could be legitimate telemetry or data exfiltration. Manual review is recommended.
    Fix: Verify the destination URL is trusted and necessary. Remove or replace with documented APIs. Ensure no secrets, tokens, or PII are transmitted.
  • medium Data Exfiltration · line 60
    Data is being sent to an external URL. This could be legitimate telemetry or data exfiltration. Manual review is recommended.
    Fix: Verify the destination URL is trusted and necessary. Remove or replace with documented APIs. Ensure no secrets, tokens, or PII are transmitted.
  • medium Data Exfiltration · line 72
    Data is being sent to an external URL. This could be legitimate telemetry or data exfiltration. Manual review is recommended.
    Fix: Verify the destination URL is trusted and necessary. Remove or replace with documented APIs. Ensure no secrets, tokens, or PII are transmitted.
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 $0.00065 $0.02181
Opus 5 $0.00032 $0.01091
Sonnet 5 $0.00013 $0.00436
Haiku 4.5 $0.00006 $0.00218

Measured 7d ago against content hash fdf2b0c15615, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-11, from the pricing page.

Security

Grade A, and why

entra-enum 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 7d 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.

curl -s "https://login.microsoftonline.com/${TARGET}/.well-known/openid-configuration" | jq '{tenant: .issuer, authz: .authorization_endpoint, token: .token_endpoint}'
packages/decepticon/decepticon/skills/standard/cloud/entra-enum/SKILL.md · 157 lines

How it starts

The opening of the file, as written. The whole thing — 157 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Entra ID / M365 Enumeration

You have a target domain (e.g. <TARGET>) and want to map the Entra ID tenant before any auth attempt. Tenant ID, validated users, federation type, MFA/CA posture — all reachable unauth. Then layer authenticated recon once you have a token.

Phase 0: Tenant discovery (unauth)

TARGET=<TARGET>           # e.g. contoso.com
# 1. OpenID config — tenant ID + auth endpoints
curl -s "https://login.microsoftonline.com/${TARGET}/.well-known/openid-configuration" | jq '{tenant: .issuer, authz: .authorization_endpoint, token: .token_endpoint}'

# 2. GetUserRealm — federation type (Managed | Federated | Unknown)
curl -s "https://login.microsoftonline.com/getuserrealm.srf?login=any@${TARGET}&xml=1"

# 3. Autodiscover — federated IdP hint (ADFS, Okta, PingFed)
curl -s "https://autodiscover-s.outlook.com/autodiscover/autodiscover.svc" \
  -H "Content-Type: text/xml; charset=utf-8" \
  -H "SOAPAction: \"http://schemas.microsoft.com/exchange/2010/Autodiscover/Autodiscover/GetFederationInformation\"" \
  -d @- <<XML | xmllint --format -
<soap:Envelope xmlns:soap="http://schemas.xmlsoap.org/soap/envelope/" xmlns:a="http://schemas.microsoft.com/exchange/2010/Autodiscover">
  <soap:Header><a:RequestedServerVersion>Exchange2010</a:RequestedServerVersion></soap:Header>
  <soap:Body><a:GetFederationInformationRequestMessage><a:Request><a:Domain>${TARGET}</a:Domain></a:Request></a:GetFederationInformationRequestMessage></soap:Body>
</soap:Envelope>
XML

# 4. Tenant branding (logo, banner string => social-engineering pretext)
curl -sI "https://login.microsoftonline.com/${TARGET}/v2.0/.well-known/openid-configuration"

Pull tenant ID into env:

TENANT=$(curl -s "https://login.microsoftonline.com/${TARGET}/.well-known/openid-configuration" | jq -r .issuer | awk -F/ '{print $4}')
echo "$TENANT"   # GUID

Phase 1: User enumeration (unauth)

o365creeper — login endpoint response codes

# AADSTS50053 = locked, AADSTS50034 = user doesn't exist, AADSTS50126 = wrong pw (= valid user)
curl -s -X POST "https://login.microsoftonline.com/common/oauth2/token" \
  -d "resource=https://graph.windows.net&client_id=1b730954-1685-4b74-9bfd-dac224a7b894&grant_type=password&username=<UPN>&password=Invalid!" \
  -d "scope=openid" | jq -r .error_description

Read the full file on GitHub · 157 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. 7d ago First seen · 157 lines · 65 tokens per session scan A fdf2b0c15615

Subscribe to this mod's changes

entra-enum is a skill published in the GitHub repository PurpleAILAB/Decepticon (5,482 stars, last pushed 11d ago), licensed Apache-2.0. It adds 65 tokens to every session and 2,181 once invoked, about $0.0003 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.