Deep Decoder

English | 中文文档

English | 中文文档

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Quick Install (Claude Code)

# 1. Add the Marketplace
/plugin marketplace add bx33661/Deep-Decoder

# 2. Install the Skill
/plugin install deep-decoder@deep-decoder-market

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What is this?

Deep Decoder is a specialized skill designed for Security Researchers, CTF Players, and AI Agents. It autonomously peels back layers of obfuscation, turning binary garbage into readable text or extracting hidden files.

Instead of guessing "Is this Base64?", simply pass the string to Deep Decoder. It recursively attempts 15+ formats until it finds the truth.

Capabilities

Feature	Description
Recursive Decoding	Automatically solves chains like Base64 → Gzip → URL → JSON.
Forensics	Detects and extracts Images, Archives, Databases, and Executables.
Crypto Solving	Brute-force solvers for XOR, Caesar, Rail Fence, Atbash, and Rot47.
Content ID	Intelligently distinguishes Source Code, English Text, and Binary Data.

Agent Usage

1. Analyze ambiguous strings

When you see a random blob of text, run this:

python scripts/deep_decode.py --input "SGVsbG8gV29ybGQ=" --pretty

2. Extract potential files

When you suspect a file is hidden in a hex dump or response:

python scripts/deep_decode.py --file traffic.dump --extract-dir ./workspace

3. Understanding the Output

The tool returns structured JSON. Look at the attempts array.

• If magic is present -> It's a file. (e.g., magic: PNG)
• If text is present -> It's readable data. (e.g., text: "password123")

Supported Formats

• Encodings: Base64, Base32, Ascii85, Hex, URL, Quoted-Printable, HTML.
• Compression: Gzip, Zlib, Deflate.
• Ciphers: XOR, Caesar, Atbash, Rot13/47, Rail Fence.
• Files: PNG, JPG, GIF, WEBP, ZIP, RAR, 7Z, PDF, ELF, PE, Class, SQLite, Office.

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