windows-boundaries SKILL.md skillA
windows-boundaries from hypnguyen1209/offensive-claude is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add hypnguyen1209/offensive-claude/windows-boundaries@git:20260629.9f4a1a5Pins git:20260629.9f4a1a5 in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- hypnguyen1209/offensive-claude
- Path
skills/windows-boundaries/SKILL.md- Versions recorded
- 5
- Latest version
- git:20260629.9f4a1a5, committed Jun 29, 2026
- First version recorded
- May 19, 2026
- Size
- 9,092 bytes
- Repository stars
- 414
- License
- MIT
Use when crossing a Windows security boundary or escaping a sandbox — kernel/user crossing (win32k/dxgkrnl UAF CVE-2025-24983), BYOVD kernel R/W, UAC/COM elevation, AppContainer/LPAC & Chromium-Mojo sandbox escape (CVE-2025-2783), PPL bypass, RPC/ALPC & named-pipe impersonation.
Collected from public GitHub. Every version is saved exactly as it was and never changes. Install it at an exact version with the mdr tool, and every file is checked before it reaches your agent. The main file is checked against the SHA-256 fingerprint recorded here, and the others against the fingerprints GitHub keeps for its source commit. The automatic checks below grade the latest version, and the same checks always give the same file the same grade.
What the file says
# Windows Security Boundaries ## When to Activate - Planning a privilege-escalation path that crosses a Windows security boundary (integrity level, AppContainer/LPAC, PPL, or the kernel/user line) - Sandbox-escape research: browser renderer (Chromium/Edge Mojo), Office WebView, packaged apps, AppContainer/LPAC brokers - Reaching Ring 0 via win32k/dxgkrnl bugs or BYOVD for a kernel read/write primitive - Defeating PPL to dump LSASS or tamper with EDR self-defense - Going from a `SeImpersonate` service account to SYSTEM via RPC/ALPC/named-pipe abuse - UAC bypass (Medium → High) via auto-elevating COM or registry hijack ## Boundary stack (high → low): VTL1 (Secure Kernel/Cred Guard) > Ring 0 (ntoskrnl/win32k/drivers) > Ring 3: System > High > Medium > Low > AppContainer/LPAC. PPL is an orthogonal wall guarding LSASS/EDR even from SYSTEM. ## Technique Map | Technique | ATT&CK | CWE | Reference | Script | |-----------|--------|-----|-----------|--------| | win32k / dxgkrnl UAF → kernel R/W → token steal | T1068 | CWE-416 | references/kernel-user-boundary.md | scripts/ioctl_fuzzer.py | …
Read the whole file at its exact version.
How to install
mdr add hypnguyen1209/offensive-claude/windows-boundaries@sha256:5f4a145e426b01d4The line at the top of this page pins the label git:20260629.9f4a1a5, which is what most people want. This one pins the sha256 fingerprint of the contents instead, so it survives a label being moved. Either way the exact version is written to mdr.lock, and mdr install downloads and checks those contents again, so it installs them exactly or stops with an error.
[](https://markdownregistry.com/a/art_e7yavfk7nwloxgv7)
5 badge image fetches in 30 days. What the badge shows.
Versions
The registry has recorded 5 versions of this file, between May 19, 2026 and Jun 29, 2026, about one every 10 days. Its first recorded version is graded C and its latest A.
| version | committed | commit | size | audit | |
|---|---|---|---|---|---|
| git:20260629.9f4a1a5 latest | 2026-06-29 | 9f4a1a5 | 9,092 B | A | view · diff |
| git:20260629.95337a2 | 2026-06-29 | 95337a2 | 9,170 B | A | view · diff |
| git:20260528.da66357 | 2026-05-28 | da66357 | 16,066 B | C | view · diff |
| git:20260528.6136b32 | 2026-05-28 | 6136b32 | 8,976 B | C | view · diff |
| git:20260519.5ae9faf | 2026-05-19 | 5ae9faf | 8,727 B | C | view |
Audit of the latest version
- pass: Frontmatter block present
- pass: Frontmatter declares a name
- pass: Frontmatter declares a description
- pass: Size between 200 bytes and 200 KB (9092 bytes)
- pass: No zero-width or bidi control characters
- pass: No instruction hidden inside an HTML comment
- pass: No link to an exfiltration or paste host
- pass: No credential-shaped string
- pass: No instruction to send local credentials anywhere
- pass: No text hidden with inline styles
- pass: No prompt-injection phrasing
- pass: No curl or wget piped into a shell
- pass: No recursive delete of root, home or parent
- pass: No instruction to read or print local credentials
- pass: No base64 blob over 200 characters
- pass: No link to a raw IP address
- pass: No script tag
Source
hypnguyen1209/offensive-claude · 414 stars · license MIT · pushed 2026-10-22 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_e7yavfk7nwloxgv7 GET https://markdownregistry.com/api/v1/resolve?ref=hypnguyen1209/offensive-claude/windows-boundaries GET https://markdownregistry.com/api/v1/blob/5f4a145e426b01d453ef1b556aa23874a09174d1660e1c67fc5decafd2aa00cf
Your AI assistant does the legwork. You hear about the deals worth your word. Hand yours the standing instructions at modelranch.com and it joins the network that reads files like this one.
Guides: the SKILL.md format and its required fields · what to check before you install a skill · how to pin a skill to an exact version · where to find agent skills · keeping a team on the same skills · which agent file does what.