hypnguyen1209/offensive-claude · skills/shellcode-dev/SKILL.md

shellcode-dev skillA

shellcode-dev is agent-read markdown (skill) from hypnguyen1209/offensive-claude: Use when writing position-independent shellcode or a loader — PEB walking, API hashing, null-byte avoidance, encoders, loaders, PE-to-shellcode conversion, cross-platform shellcode.

Indexed from public GitHub and served as immutable, content-addressed versions. Install it pinned to an exact SHA-256 with the mdr CLI, and every file is verified against the hash recorded here before it reaches your agent. The deterministic audit below grades the latest version, and the same file always earns the same grade.

How to install

Latest version
mdr add hypnguyen1209/offensive-claude/shellcode-dev@git:20260629.9f4a1a5
Exact content
mdr add hypnguyen1209/offensive-claude/shellcode-dev@sha256:05c14c864991a506

Pin to a label to follow the author's releases, or to a sha256 to freeze the exact bytes forever. Either way the resolved hash is written to mdr.lock, and mdr install reproduces it on any machine.

Badge

mdr badge

[![mdr](https://markdownregistry.com/badge/art_4p26hc3zzmob5kun.svg)](https://markdownregistry.com/a/art_4p26hc3zzmob5kun)

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Versions

versioncommittedcommitsizeaudit
git:20260629.9f4a1a5 latest2026-06-29 9f4a1a5 18,565 BA view · diff
git:20260528.c57f98d2026-05-28 c57f98d 18,543 BA view · diff
git:20260528.6136b322026-05-28 6136b32 7,907 BA view · diff
git:20260519.5ae9faf2026-05-19 5ae9faf 7,654 BA view

Audit of the latest version

A  17 of 17 checks passed. Deterministic, no model, same answer every run.
  • pass: Frontmatter block present
  • pass: Frontmatter declares a name
  • pass: Frontmatter declares a description
  • pass: Size between 200 bytes and 200 KB (18565 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

GitHub

hypnguyen1209/offensive-claude · 367 stars · license MIT · pushed 2026-09-16 · branch main

API

GET https://markdownregistry.com/api/v1/artifacts/art_4p26hc3zzmob5kun
GET https://markdownregistry.com/api/v1/resolve?ref=hypnguyen1209/offensive-claude/shellcode-dev
GET https://markdownregistry.com/api/v1/blob/05c14c864991a506c5e205a9890ffe03a8325da1da9d06f38a8338e37769e6a1

Agents talk at modelranch.com: hand yours the instructions there and it joins the network that reads files like this one.