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 vinayaklatthe/microsoft-security-skills --skill defender-for-identitygit clone --depth 1 https://github.com/vinayaklatthe/microsoft-security-skillsWrote 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/vinayaklatthe/microsoft-security-skills/defender-for-identity)<a href="https://agentmods.dev/skills/vinayaklatthe/microsoft-security-skills/defender-for-identity"><img src="https://agentmods.dev/badge/skills/vinayaklatthe/microsoft-security-skills/defender-for-identity/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/vinayaklatthe/microsoft-security-skills/defender-for-identity"><img src="https://agentmods.dev/badge/skills/vinayaklatthe/microsoft-security-skills/defender-for-identity.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 | $0.00167 | $0.01893 |
| Opus 5 | $0.00084 | $0.00946 |
| Sonnet 5 | $0.00033 | $0.00379 |
| Haiku 4.5 | $0.00017 | $0.00189 |
Grade A, and why
defender-for-identity 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 12d 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.
How it starts
The opening of the file, as written. The whole thing — 123 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Microsoft Defender for Identity
Microsoft Defender for Identity (MDI) is a cloud-based identity threat detection and response (ITDR) solution. Lightweight sensors on domain controllers and other identity infrastructure parse network traffic, ETW events, and AD object reads to detect reconnaissance, credential theft, lateral movement, and domain dominance. Signals correlate into Defender XDR incidents.
When to use
Detecting identity-based attacks against on-premises Active Directory, AD CS, AD FS, and Entra Connect — and surfacing identity posture issues (legacy protocols, unsecure accounts, risky delegations) that lead to those attacks.
Do not use this skill for cloud-only Entra ID risk detection — that is Entra ID
Protection (entra-id-protection). MDI sees on-prem and hybrid identity infrastructure.
Map the attack to a detection source
Pick the row that matches the attacker behaviour to confirm MDI is the right control and which sensor surface produces the signal.
| If the attacker is... | MDI detection family | Sensor surface |
|---|---|---|
| Enumerating users, groups, SPNs | Reconnaissance | DC sensor (LDAP, SAMR) |
| Cracking service-account TGS tickets offline | Kerberoasting | DC sensor (Kerberos) |
| Replicating directory secrets (DCSync) | Domain dominance | DC sensor (DRSUAPI RPC) |
| Forging Kerberos tickets | Golden / Silver Ticket | DC sensor (Kerberos anomalies) |
| Abusing AD CS misconfig (ESC1–ESC8) | Certificate-based privilege escalation | AD CS sensor |
| Hijacking the AD FS sign-in flow | Token / SAML forgery | AD FS sensor |
| Stealing Entra Connect sync account creds | Hybrid identity compromise | Entra Connect sensor |
| Probing risky configurations (legacy SMB, weak SPNs) | Identity Security Posture (ISPM) | All sensors + cloud assessments |
Rule of thumb: if the attacker touches an on-prem identity service for any step, MDI should see it. A gap in any sensor (one un-instrumented DC, AD CS, or AD FS) is a blind spot for the whole kill chain.
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.
- 12d ago First seen · 123 lines · 167 tokens per session scan A 22cf820ef540
defender-for-identity is a skill published in the GitHub repository vinayaklatthe/microsoft-security-skills (173 stars, last pushed 2mo ago), licensed MIT. It adds 167 tokens to every session and 1,893 once invoked, about $0.0008 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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