offensive-windows-boundaries

offensive-windows-boundaries is a skill for Claude Code, Codex from Miosa-osa/OSA. It costs 58 tokens per session (909 once invoked), scanned A, original, Apache-2.0.

A guide to Windows security boundaries, the separations between components with different levels of trust or privilege. It covers the kernel and user boundary, application sandboxes, COM and RPC, the hypervisor, and transitions between trust levels.

In plain words
What is it for?
It is for enumerating Windows attack surfaces, planning authorized privilege-escalation or sandbox-escape research, and understanding how Windows components are separated.
Why use it?
It helps security testers map where a process might cross from a restricted area into a more trusted one. This gives structure to privilege-escalation and sandbox-escape analysis.

Skill for Claude CodeCodex

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

Good fit It is for enumerating Windows attack surfaces, planning authorized privilege-escalation or sandbox-escape research, and understanding how Windows components are separated.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/miosa-osa/osa/offensive-windows-boundaries
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 Miosa-osa/OSA --skill offensive-windows-boundaries
Clone the repo
git clone --depth 1 https://github.com/Miosa-osa/OSA

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 offensive-windows-boundaries

README.md
[![agentmods](https://agentmods.dev/badge/skills/miosa-osa/osa/offensive-windows-boundaries/github.svg)](https://agentmods.dev/skills/miosa-osa/osa/offensive-windows-boundaries)
Your own site
<a href="https://agentmods.dev/skills/miosa-osa/osa/offensive-windows-boundaries"><img src="https://agentmods.dev/badge/skills/miosa-osa/osa/offensive-windows-boundaries/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 offensive-windows-boundaries

Your own site · 80×15
<a href="https://agentmods.dev/skills/miosa-osa/osa/offensive-windows-boundaries"><img src="https://agentmods.dev/badge/skills/miosa-osa/osa/offensive-windows-boundaries.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 58 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 909 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 $0.00058 $0.00909
Opus 5.5 $0.00023 $0.00364
Sonnet 5.5 $0.00012 $0.00182
Haiku 4.5 $0.00006 $0.00091

Measured 1mo ago against content hash 2d75a41798a4, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

offensive-windows-boundaries 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 1mo 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.

priv/skills/offensive-windows-boundaries/SKILL.md · 93 lines

How it starts

The opening of the file, as written. The whole thing — 93 lines — stays where its author put it; the contents beside it link to each section on GitHub.

SKILL: Week 7: Defeating Windows Security Boundaries

Metadata

Description

Windows security boundary taxonomy and attack surface enumeration: kernel/user boundary, sandbox boundaries (LPAC, AppContainer), COM/RPC boundaries, hypervisor boundary, trust level transitions. Use when planning privilege escalation paths, sandbox escapes, or understanding Windows security architecture.

Trigger Phrases

Use this skill when the conversation involves any of: Windows boundaries, security boundary, kernel user boundary, sandbox escape, AppContainer, LPAC, COM boundary, RPC boundary, hypervisor, Hyper-V, privilege escalation, trust level

Full Methodology

Week 7: Defeating Windows Security Boundaries

Overview

created by AnotherOne from @Pwn3rzs Telegram channel.

Week 6 taught you how mitigations work defensively. You'll learn to bypass the OS security policies and features that prevent your code from running, your processes from accessing protected resources, and your actions from being logged. This is distinct from Week 8, which teaches you how to bypass exploit mitigations (DEP, ASLR, CFG) once your code is already running.

Week 7 vs Week 8 - The Key Distinction:

  • Week 7 answers: "Can my code execute at all?" - bypass AMSI, WDAC, ASR, AppContainers, integrity levels, PPL, ETW telemetry
  • Week 8 answers: "Can my exploit succeed?" - bypass DEP, ASLR, stack cookies, CFG/XFG, heap safe-unlinking

This Week's Focus:

  • Offensive reconnaissance and mitigation fingerprinting
  • AMSI bypass and script-based attack techniques
  • Protected Process Light (PPL) exploitation
  • Sandbox, integrity level, and AppContainer bypass
  • WDAC and Attack Surface Reduction (ASR) bypass
  • ETW manipulation and telemetry blinding
  • Kernel driver interaction fundamentals (preparation for Week 11)

Read the full file on GitHub · 93 lines

Files

What ships with it

1 file beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.

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. 1mo ago First seen · 93 lines · 58 tokens per session scan A 2d75a41798a4

Subscribe to this mod's changes

offensive-windows-boundaries is a skill published in the GitHub repository Miosa-osa/OSA (78 stars, last pushed 11d ago), licensed Apache-2.0. It adds 58 tokens to every session and 909 once invoked, about $0.0002 per session on Opus 5.5. 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 2026-09-14.