AES Shellcode Payload Encryptor

A small Windows utility that encrypts raw shellcode using AES-256-CBC.

The project provides a simple and reliable way to encrypt binary payloads using native Windows cryptographic APIs. It reads a raw shellcode file, generates a random AES key and initialization vector, encrypts the data, and exports the result in formats that can be directly reused in C source code. The implementation focuses on clarity, correctness, and ease of use, without adding unnecessary complexity.

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Features

• AES-256-CBC encryption
• Random key and IV generation
• PKCS#7 padding
• Outputs encrypted payload, key, and IV as C arrays

Build & Usage

gcc shellcrypt.c Tool/crypto.c -o shellcrypt.exe -lAdvapi32

shellcrypt.exe <shellcode_file>

Output

Files generated :

• shellcode_aes.bin – encrypted shellcode (binary)
• shellcode_aes.txt – encrypted shellcode as C array
• key_iv.txt – AES key and IV as C arrays

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License

MIT License

Disclaimer

For educational and research use only.