Home / ljagiello / ctf-skills · GitHub

ctf-forensics SKILL.md skillA

ctf-forensics from ljagiello/ctf-skills is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.

Install it, pinned

mdr add ljagiello/ctf-skills/ctf-forensics@git:20261027.2388a3b

Pins 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-forensics/SKILL.md
Versions recorded: 7
Latest version: git:20261027.2388a3b, committed Oct 27, 2026
First version recorded: Mar 28, 2026
Size: 37,034 bytes
Repository stars: 3,657
License: MIT

Provides digital forensics and signal analysis techniques for CTF challenges. Use when analyzing disk images, memory dumps, event logs, network captures, cryptocurrency transactions, steganography, PDF analysis, Windows registry, Volatility, PCAP, Docker images, coredumps, side-channel power traces, DTMF audio spectrograms, packet timing analysis, CD audio disc images, or recovering deleted files and credentials.

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 Forensics & Blockchain

Quick reference for forensics CTF challenges. Each technique has a one-liner here; see supporting files for full details.

## Prerequisites

**Python packages (all platforms):**
```bash
pip install volatility3 Pillow numpy matplotlib scipy librosa scikit-learn opencv-python-headless pymongo impacket brotli exrex stegano heatshrink2
```

**Linux (apt):**
```bash
apt install binwalk foremost libimage-exiftool-perl tshark sleuthkit \
  ffmpeg steghide testdisk john pcapfix
```

**macOS (Homebrew):**
```bash
brew install binwalk exiftool wireshark sleuthkit ffmpeg \
  testdisk john-jumbo
```

**Ruby gems (all platforms):**
```bash
gem install zsteg
```

## Additional Resources

- [3d-printing.md](3d-printing.md) - 3D printing forensics (PrusaSlicer binary G-code, QOIF, heatshrink)
- [windows.md](windows.md) - Windows forensics (registry, SAM, event logs, recycle bin, NTFS alternate data streams, USN journal, PowerShell history, Defender MPLog, WMI persistence, Amcache)
…

Read the whole file at its exact version.

How to install

The exact contents, by fingerprint

mdr add ljagiello/ctf-skills/ctf-forensics@sha256:5f28e2511595b559

The 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.

Badge

[![mdr](https://markdownregistry.com/badge/art_n7hxuu6dosvw2jjp.svg)](https://markdownregistry.com/a/art_n7hxuu6dosvw2jjp)

3 badge image fetches in 30 days. What the badge shows.

Versions

The registry has recorded 7 versions of this file, between Mar 28, 2026 and Oct 27, 2026, about one every 35 days.

version	committed	commit	size	audit
git:20261027.2388a3b latest	2026-10-27	2388a3b	37,034 B	A	view · diff
git:20261015.0d99b9d	2026-10-15	0d99b9d	37,008 B	A	view · diff
git:20260912.61c2efe	2026-09-12	61c2efe	36,687 B	A	view · diff
git:20260417.b80ec3f	2026-04-17	b80ec3f	36,688 B	A	view · diff
git:20260413.62df117	2026-04-13	62df117	36,679 B	A	view · diff
git:20260403.008fb99	2026-04-03	008fb99	36,215 B	A	view · diff
git:20260328.ac4dfd9	2026-03-28	ac4dfd9	34,506 B	A	view

Audit of the latest version

A 17 of 17 checks passed. Fixed automatic checks with no AI involved, so the same checks give the 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 (37034 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

ljagiello/ctf-skills · 3,657 stars · license MIT · pushed 2026-11-06 · branch main

API

GET https://markdownregistry.com/api/v1/artifacts/art_n7hxuu6dosvw2jjp
GET https://markdownregistry.com/api/v1/resolve?ref=ljagiello/ctf-skills/ctf-forensics
GET https://markdownregistry.com/api/v1/blob/5f28e2511595b559678649f8f68b2e40a64861e7f2a9f6562a0cf91b145998bb

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.

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