ctf-forensics
The ctf-forensics Claude Code skill provides quick-reference techniques for analyzing digital evidence in capture-the-flag competitions, including disk images, memory dumps, network traffic, registry hives, and steganographic media. Use this skill when tackling forensics CTF challenges requiring identification and extraction of artifacts from Windows systems, network captures, Linux file systems, Docker containers, or multimedia files through tools like Volatility, Wireshark, and binwalk.
git clone --depth 1 https://github.com/ljagiello/ctf-skills /tmp/ctf-forensics && cp -r /tmp/ctf-forensics/ctf-forensics ~/.claude/skills/ctf-forensicsSKILL.md
# 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 ``` **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) - [network.md](network.md) - Network forensics basics (tcpdump, TLS/SSL keylog decryption, TLS master key extraction from coredump, Wireshark, PCAP, port scanning, SMB3 decryption, 5G/NR protocols, WordPress recon, credentials, USB HID steno, BCD encoding, HTTP file upload exfiltration, split archive reassembly via timestamp ordering) - [network-advanced.md](network-advanced.md) - Advanced network forensics (packet interval timing encoding, NTLMv2 hash cracking, TCP flag covert channel, DNS last-byte steganography, DNS trailing byte binary encoding, multi-layer PCAP with XOR + ZIP and mDNS key, Brotli decompression bomb seam analysis, SMB RID recycling via LSARPC, Timeroasting MS-SNTP hash extraction, dnscat2 reassembly, RADIUS shared secret cracking, RC4 stream identification, ICMP payload byte rotation, ICMP ping time-delay covert channel) - [peripheral-capture.md](peripheral-capture.md) - USB/HID/Bluetooth peripheral traffic reconstruction (USB HID mouse/pen drawing recovery, USB HID keyboard capture decoding, USB keyboard LED Morse code exfiltration, USB HID keyboard arrow key navigation tracking, Bluetooth RFCOMM packet reassembly) - [disk-and-memory.md](disk-and-memory.md) - Core disk/memory forensics (Volatility, disk mounting/carving, VM/OVA/VMDK, VMware snapshots, GIMP raw memory dump visual inspection, coredumps, Windows KAPE triage, PowerShell ransomware, Android forensics, Docker container forensics, cloud storage forensics, BSON reconstruction, TrueCrypt/VeraCrypt mounting) - [disk-advanced.md](disk-advanced.md) - Advanced disk and memory techniques (deleted partitions, ZFS forensics, GPT GUID encoding, VMDK sparse parsing, memory dump string carving, ransomware key recovery, WordPerfect macro XOR, minidump ISO 9660 recovery, APFS snapshot recovery, RAID 5 XOR recovery, HFS+ resource fork recovery, Kyoto Cabinet hash DB forensics, SQLite edit history reconstruction) - [disk-recovery.md](disk-recovery.md) - Disk recovery and extraction patterns (LUKS master key recovery, PRNG timestamp seed brute-force, VBA macro binary recovery, FemtoZip decompression, XFS filesystem reconstruction, tar duplicate entry extraction, nested matryoshka filesystem extraction, anti-carving via null byte interleaving, BTRFS subvolume/snapshot recovery, FAT16 free space data recovery, FAT16 deleted file recovery via Sleuth Kit fls/icat, ext2 orphaned inode recovery via fsck, corrupted ZIP header repair) - [steganography.md](steganography.md) - General steganography (binary border stego, PDF multi-layer stego, SVG keyframes, PNG reorder, file overlays, GIF frame diff Morse code, GZSteg + spammimic, spreadsheet frequency recovery, Kitty terminal graphics protocol decoding, ANSI escape sequence steganography, autostereogram solving, two-layer byte+line interleaving, multi-stream video container stego, progressive PNG layered XOR decryption, QR code reconstruction from curved reflection) - [stego-image.md](stego-image.md) - Image-specific steganography (JPEG unused DQT table LSB, BMP bitplane QR extraction, image puzzle reassembly, F5 JPEG DCT ratio detection, PNG unused palette entry stego, QR code tile reconstruction, seed-based pixel permutation + multi-bitplane QR, JPEG thumbnail pixel-to-text mapping, conditional LSB with pixel filtering, JPEG slack space, nearest-neighbor interpolation stego, RGB parity steganography) - [stego-advanced.md](stego-advanced.md) - Advanced steganography part 1: audio and signal techniques (FFT frequency domain, DTMF audio, SSTV+LSB, DotCode barcode, custom frequency dual-tone keypad, multi-track audio differential subtraction, cross-channel multi-bit LSB, audio FFT musical notes, audio metadata octal encoding, nested tar whitespace encoding, DeepSound audio stego with password cracking, audio waveform binary encoding, audio spectrogram hidden QR) - [stego-advanced-2.md](stego-advanced-2.md) - Advanced steganography part 2: video, image transform, and format-specific techniques (video frame accumulation, reversed audio, video frame averaging, JPEG XL TOC permutation steganography, Arnold's Cat Map descrambling, high-resolution SSTV custom FM demodulation, MJPEG FFD9 trailing byte stego, EXIF zlib + Stegano pixel patterns, PDF xref covert channel, ANSI escape code stego, pixel-wise ECB deduplication) - [linux-forensics.md](linux-forensics.md) - Linux/app forensics (log analysis, Docker image forensics, attack chains, browser credentials, Firefox history, TFTP, TLS weak RSA, USB audio, Git directory recovery, KeePass v4 cracking, Git reflog/fsck squash recovery, browser artifact analysis (Chrome/Chromium/Firefox history, cookies, downloads, local storage, session restore), corrupted git blob repair via byte brute-force, VBA macro Excel cell data to ELF binary extraction, Python in-memory source recovery via pyrasite) - [signals-and-hardware.md](signals-and-hardware.md) - Hardware signal decoding with decode code (VGA frame parsing, HDMI TMDS symbol decode, DisplayPort 8b/10b + LFSR descrambler), Voyager Golden Record audio, Saleae Logic 2 UART decode, Flipper Zero .sub files, s
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.
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.
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 indicators of compromise.
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.
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.
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.
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.
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.