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ljagiello/ctf-malware

Analyse de malwares et de trafic réseau pour challenges CTF. Utilisez-le pour analyser des scripts obfusqués, paquets malveillants, protocoles crypto personnalisés, trafic C2, binaires PE/.NET, communications chiffrées RC4/AES, règles YARA, shellcodes, forensique mémoire (Volatility malfind, détection d'injection de processus), techniques anti-analyse (détection VM/sandbox, contournement temporel, hachage d'API, injection de processus, vérifications d'environnement) ou extraction de configurations et d'indicateurs de compromission.

Qu'est-ce que ctf-malware ?

Ce skill est conçu pour les participants aux challenges CTF (Capture The Flag) qui doivent analyser des malwares et du trafic réseau malveillant. Il fournit des techniques et méthodologies pour déchiffrer des scripts obfusqués, examiner des paquets malveillants, comprendre des protocoles cryptographiques personnalisés, et analyser le trafic de commande et contrôle (C2). Il prend en charge l'analyse de binaires PE (Portable Executable) et .NET, les communications chiffrées avec RC4 et AES, ainsi que les règles YARA. En forensique mémoire, il couvre des outils comme Volatility (malfind, détection d'injection de processus) et les techniques anti-analyse utilisées par les malwares (détection de VM/sandbox, contournement temporel, hachage d'API, injection de processus). Le skill permet également d'extraire des configurations de malwares et des indicateurs de compromission (IOC), facilitant la résolution des défis CTF complexes.

Compatible avec~Claude Code~Codex CLI~Cursor
npx skills add https://github.com/ljagiello/ctf-skills/tree/main/skills/ctf-malware

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Documentation

Que fait ctf-malware ?

Fournit des techniques d'analyse de malwares et de trafic réseau pour les challenges CTF. À utiliser lors de l'analyse de scripts obfusqués, de paquets malveillants, de protocoles cryptographiques personnalisés, de trafic C2, de binaires PE/.NET, de communications chiffrées RC4/AES, de règles YARA, d'analyse de shellcode, de forensique mémoire pour malwares (Volatility malfind, détection d'injection de processus), de techniques anti-analyse (détection de VM/sandbox, contournement temporel, hachage d'API, injection de processus, vérifications d'environnement), ou d'extraction de configurations de malwares et d'indicateurs de compromission.

Individual skills in this repo

This repo contains 10 individual skills — each has its own dedicated page.

ljagiello/ctf-ai-ml

Provides AI and machine learning techniques for CTF challenges. Use when attacking ML models, crafting adversarial examples, performing model extraction, prompt injection, membership inference, training data poisoning, fine-tuning manipulation, neural network analysis, LoRA adapter exploitation, LLM jailbreaking, or solving AI-related puzzles.

ljagiello/ctf-crypto

Provides cryptography attack techniques for CTF challenges. Use when attacking encryption, hashing, signatures, ZKP, PRNG, or mathematical crypto problems involving RSA, AES, ECC, lattices, LWE, CVP, number theory, Coppersmith, Pollard, Wiener, padding oracle, GCM, key derivation, or stream/block cipher weaknesses.

ljagiello/ctf-forensics

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.

ljagiello/ctf-misc

Provides miscellaneous CTF challenge techniques for problems that do not cleanly fit the main categories. Use for encoding puzzles, pyjails, bash jails, RF/SDR, DNS oddities, unicode tricks, esoteric languages, QR or audio puzzles, constraint solving, game theory, unusual sandbox escapes, and hybrid logic puzzles. Prefer a more specific skill first when the challenge is mainly web, pwn, reverse, forensics, malware, OSINT, or crypto. Treat this as the fallback skill for genuine cross-category or edge-case challenges, not the default starting point.

ljagiello/ctf-osint

Provides open source intelligence techniques for CTF challenges. Use when gathering information from public sources, social media, geolocation, DNS records, username enumeration, reverse image search, Google dorking, Wayback Machine, Tor relays, FEC filings, or identifying unknown data like hashes and coordinates.

ljagiello/ctf-pwn

Provides binary exploitation techniques for CTF challenges. Use when you already have a vulnerable native target or service and need to turn memory corruption or low-level primitives into code execution or privilege escalation, such as buffer overflows, format strings, heap bugs, ROP, ret2libc, shellcode, kernel exploitation, seccomp bypass, sandbox escape, or Windows/Linux exploit chains. Do not use it when the main blocker is understanding what the binary does; use reverse engineering first. Do not use it for pure web bugs, disk or packet forensics, or standalone crypto/math challenges.

ljagiello/ctf-reverse

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 disk forensics, or standalone crypto problems unless reversing the implementation is the real blocker.

ljagiello/ctf-web

Provides web exploitation techniques for CTF challenges. Use when the target is primarily an HTTP application, API, browser client, template engine, identity flow, or smart-contract frontend/backend surface, including XSS, SQLi, SSTI, SSRF, XXE, JWT, auth bypass, file upload, request smuggling, OAuth/OIDC, SAML, prototype pollution, and similar web bugs. Do not use it for native binary memory corruption, reverse engineering of standalone executables, disk or memory forensics, or pure cryptanalysis unless the web flaw is still the main path to the flag.

ljagiello/ctf-writeup

Generates a single standardized submission-style CTF writeup for competition handoff and organizer review. Use after solving a CTF challenge to document the solution steps, tools used, and lessons learned in a structured format.

ljagiello/solve-challenge

Solves CTF challenges by performing first-pass triage, identifying the dominant category, and routing execution to the right specialized ctf-* skill. Use when the user gives you a challenge bundle, a remote service, a suspicious file, or only a vague challenge description and you must determine where to start. Do not use it when the category is already clear and a specialized skill can be invoked directly; this is the dispatcher and recon entrypoint, not the deepest reference for category-specific techniques.

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