ctf-malware SKILL.md skillA

ctf-malware 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-malware@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-malware/SKILL.md
Versions recorded: 7
Latest version: git:20261027.2388a3b, committed Oct 27, 2026
First version recorded: Mar 27, 2026
Size: 9,091 bytes
Repository stars: 3,657
License: MIT

Provides malware analysis and network traffic techniques for CTF challenges. Use when analyzing obfuscated scripts, malicious packages, custom crypto protocols, C2 traffic, PE/.NET binaries, RC4/AES encrypted communications, YARA rules, shellcode analysis, memory forensics for malware (Volatility malfind, process injection detection), anti-analysis techniques (VM/sandbox detection, timing evasion, API hashing, process injection, environment checks), or extracting malware configurations and…

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 Malware & Network Analysis

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

## Prerequisites

**Python packages (all platforms):**
```bash
pip install yara-python pefile capstone oletools unicorn pycryptodome \
  volatility3 dissect.cobaltstrike
```

**Linux (apt):**
```bash
apt install strace ltrace tshark binwalk binutils
```

**macOS (Homebrew):**
```bash
brew install wireshark binwalk binutils ghidra
```

**Manual install:**
- dnSpy — [GitHub](https://github.com/dnSpy/dnSpy), .NET decompiler (Windows)

**MCP servers (optional):** IDA Pro MCP / Ghidra MCP (unpacking, config extraction), WinDbg MCP ([svnscha/mcp-windbg](https://github.com/svnscha/mcp-windbg)) for dynamic analysis, JADX MCP for Android — see [tools-mcp.md](tools-mcp.md). Run malware only in an isolated, disposable VM.

## Additional Resources
…

Read the whole file at its exact version.

How to install

The exact contents, by fingerprint

mdr add ljagiello/ctf-skills/ctf-malware@sha256:1fd901d9ce449b10

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_mqtrws6az2romwtb.svg)](https://markdownregistry.com/a/art_mqtrws6az2romwtb)

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

Versions

The registry has recorded 7 versions of this file, between Mar 27, 2026 and Oct 27, 2026, about one every 36 days.

version	committed	commit	size	audit
git:20261027.2388a3b latest	2026-10-27	2388a3b	9,091 B	A	view · diff
git:20261015.c957f4f	2026-10-15	c957f4f	9,065 B	A	view · diff
git:20260912.61c2efe	2026-09-12	61c2efe	8,392 B	A	view · diff
git:20260403.008fb99	2026-04-03	008fb99	8,379 B	A	view · diff
git:20260328.8d978f1	2026-03-28	8d978f1	7,950 B	A	view · diff
git:20260327.40100a9	2026-03-27	40100a9	7,369 B	A	view · diff
git:20260327.62aa5ea	2026-03-27	62aa5ea	6,997 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 (9091 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_mqtrws6az2romwtb
GET https://markdownregistry.com/api/v1/resolve?ref=ljagiello/ctf-skills/ctf-malware
GET https://markdownregistry.com/api/v1/blob/1fd901d9ce449b1030ac47b1cda9440aaec12e3b9c42eec780ff2abbb4ec0902

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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