investigating-windows-endpoints

investigating-windows-endpoints is a skill for Claude Code, Codex from EvilFreelancer/secs. It costs 113 tokens per session (1,735 once invoked), scanned A, original, Apache-2.0.

A workflow for investigating suspected intrusions on Windows computers using files, registry data, caches, shortcuts, and event logs. It combines these artifacts into a timeline with the Eric Zimmerman forensic tools.

In plain words
What is it for?
Collecting and analysing MFT and USN Journal data, registry hives, AmCache, ShimCache, Prefetch, LNK files, Jump Lists, ShellBags, and event logs to investigate compromise, persistence, lateral movement, or data staging.
Why use it?
It helps investigators determine what ran, when, and by whom while preserving evidence and limiting changes caused by the investigation itself.

Skill for Claude CodeCodex

Written for no agent in particular: nothing here depends on one. Also seen: installed under .agents/ (shared by several agents); mentions AGENTS.md.

Good fit Collecting and analysing MFT and USN Journal data, registry hives, AmCache, ShimCache, Prefetch, LNK files, Jump Lists, ShellBags, and event logs to investigate compromise, persistence, lateral movement, or data staging.

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Install with agentmods
npx agentmods add skills/evilfreelancer/secs/investigating-windows-endpoints
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 EvilFreelancer/secs --skill investigating-windows-endpoints
Clone the repo
git clone --depth 1 https://github.com/EvilFreelancer/secs

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 investigating-windows-endpoints

README.md
[![agentmods](https://agentmods.dev/badge/skills/evilfreelancer/secs/investigating-windows-endpoints.svg)](https://agentmods.dev/skills/evilfreelancer/secs/investigating-windows-endpoints)
Your own site
<a href="https://agentmods.dev/skills/evilfreelancer/secs/investigating-windows-endpoints"><img src="https://agentmods.dev/badge/skills/evilfreelancer/secs/investigating-windows-endpoints.svg" alt="Measured on agentmods" height="20"></a>
Per session 113 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 1,735 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.
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 $0.00113 $0.01735
Opus 5 $0.00056 $0.00868
Sonnet 5 $0.00023 $0.00347
Haiku 4.5 $0.00011 $0.00173

Measured 7d ago against content hash 63c012e7414a, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-07, from the pricing page.

Security

Grade A, and why

investigating-windows-endpoints 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 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.

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.

.agents/skills/investigating-windows-endpoints/SKILL.md · 120 lines

How it starts

The opening of the file, as written. The whole thing — 120 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Investigating Windows Endpoints

A Windows host records far more about what ran on it than most operators expect — in the MFT, the registry, execution caches, and shell history — and most of it survives a reboot and a deleted file. The investigator's job is to read those artifacts in the right order, correlate them into one timeline, and separate the adversary's activity from the machine's normal churn. The trap is contamination: every interactive command you run on a live host writes new artifacts and can overwrite the very evidence you came for. Preserve before you poke.

Order of volatility governs the first move: if the host is live and the memory is worth having, capture RAM before disk (hand it to analyzing-memory-images). Record what you touch and when, so your own footprint is separable from the adversary's in the timeline. Confirm the host is in scope per AGENTS.md before acquisition.

When to Use

  • A Windows endpoint is suspected of compromise and needs disk/registry triage
  • Reconstructing what executed, when, and by whom from on-disk artifacts
  • Finding persistence, lateral-movement, and data-staging evidence on a host
  • Confirming or refuting a hunt lead or an alert on a specific machine
  • Producing a host timeline for an incident

When NOT to Use

  • A memory image / RAM capture — use analyzing-memory-images; injected code and live process state live there, not on disk
  • A specific suspicious binary — hand it to analyzing-malware
  • Network evidence — use analyzing-network-traffic
  • The compromise is in the cloud control plane — use investigating-aws-incidents, investigating-azure-incidents, or investigating-gcp-incidents
  • Proactive search with no specific host in hand — use hunting-threats
  • Running the whole incident (scoping, containment, comms) — use responding-to-incidents; this skill is the host-artifact deep dive within it

Preserve First (order of volatility)

  1. If live and warranted: memory, then active processes/connections/services — before disk changes them.
  2. Triage-image the artifacts rather than working the live filesystem. KAPE collects the standard set fast:

Read the full file on GitHub · 120 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 · 120 lines · 113 tokens per session scan A 63c012e7414a

Subscribe to this mod's changes

investigating-windows-endpoints is a skill published in the GitHub repository EvilFreelancer/secs (10 stars, last pushed 29d ago), licensed Apache-2.0. It adds 113 tokens to every session and 1,735 once invoked, about $0.0006 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 2026-08-31.

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