ctf-reverse SKILL.md skillA
ctf-reverse from ljagiello/ctf-skills is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add ljagiello/ctf-skills/ctf-reverse@git:20261027.2388a3bPins git:20261027.2388a3b in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- ljagiello/ctf-skills
- Path
ctf-reverse/SKILL.md- Versions recorded
- 11
- Latest version
- git:20261027.2388a3b, committed Oct 27, 2026
- First version recorded
- Apr 3, 2026
- Size
- 15,934 bytes
- Repository stars
- 3,657
- License
- MIT
Provides reverse engineering techniques for CTF challenges. Use when the main job is to understand how a compiled, obfuscated, packed, or virtualized target works before exploiting or solving it, including binaries, APKs, WASM, firmware, custom VMs, bytecode, game clients, malware-like loaders, and anti-debug or anti-analysis logic. Do not use it when the vulnerability is already understood and the remaining task is exploitation; use pwn instead. Do not use it for pure web workflows, log or…
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
# CTF Reverse Engineering Quick reference for RE challenges. For detailed techniques, see supporting files. ## Prerequisites **Python packages (all platforms):** ```bash pip install frida-tools angr qiling uncompyle6 capstone lief z3-solver # For Python 3.9+ bytecode: build pycdc from source git clone https://github.com/zrax/pycdc && cd pycdc && cmake . && make ``` **Linux (apt):** ```bash apt install gdb radare2 binutils strace ltrace apktool upx ``` **macOS (Homebrew):** ```bash brew install gdb radare2 binutils apktool upx ghidra ``` **radare2 plugins:** ```bash r2pm -ci r2ghidra # Native Ghidra decompiler for radare2 # The prebuilt r2ghidra zip is ABI-locked to one radare2 version (WARN: ABI mismatch: Expect 142 vs 152); r2pm -ci r2ghidra builds the plugin from source instead. ``` **Manual install:** - pwndbg — Linux: [GitHub](https://github.com/pwndbg/pwndbg), macOS: `brew install pwndbg/tap/pwndbg-gdb` …
Read the whole file at its exact version.
How to install
mdr add ljagiello/ctf-skills/ctf-reverse@sha256:f8df1575e6e0d245The line at the top of this page pins the label git:20261027.2388a3b, 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_vcuzpznin6l4whhc)
2 badge image fetches in 30 days. What the badge shows.
Versions
The registry has recorded 11 versions of this file, between Apr 3, 2026 and Oct 27, 2026, about one every 21 days.
| version | committed | commit | size | audit | |
|---|---|---|---|---|---|
| git:20261027.2388a3b latest | 2026-10-27 | 2388a3b | 15,934 B | A | view · diff |
| git:20261020.10ca5a7 | 2026-10-20 | 10ca5a7 | 15,908 B | A | view · diff |
| git:20261019.fcbd8a8 | 2026-10-19 | fcbd8a8 | 15,763 B | A | view · diff |
| git:20261017.3bb6bad | 2026-10-17 | 3bb6bad | 15,554 B | A | view · diff |
| git:20261015.c957f4f | 2026-10-15 | c957f4f | 15,032 B | A | view · diff |
| git:20261015.0d99b9d | 2026-10-15 | 0d99b9d | 13,483 B | A | view · diff |
| git:20260912.61c2efe | 2026-09-12 | 61c2efe | 13,279 B | A | view · diff |
| git:20260417.b80ec3f | 2026-04-17 | b80ec3f | 12,960 B | A | view · diff |
| git:20260413.730d82f | 2026-04-13 | 730d82f | 12,574 B | A | view · diff |
| git:20260403.008fb99 | 2026-04-03 | 008fb99 | 11,819 B | A | view · diff |
| git:20260403.1c010be | 2026-04-03 | 1c010be | 11,472 B | A | 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 (15934 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
ljagiello/ctf-skills · 3,657 stars · license MIT · pushed 2026-11-06 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_vcuzpznin6l4whhc GET https://markdownregistry.com/api/v1/resolve?ref=ljagiello/ctf-skills/ctf-reverse GET https://markdownregistry.com/api/v1/blob/f8df1575e6e0d2452058de2529901a60755e03d2ab8b65cb89bd68cb840229a0
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.
More from ljagiello/ctf-skills
Every file in ljagiello/ctf-skills