Shellcode Encoder x86/x64

Shellcode Encoder — Multi-Scheme x86/x64

Command-line tool that takes raw shellcode and produces encoded versions with an integrated decoder stub:

• XOR Rolling Key — Each byte is XORed with a rotating key. 15-byte decoder stub.
• AES-128 Stub — AES-encrypted with a decoder stub containing the key that decrypts at runtime. ~200 bytes overhead.
• RC4 Stream — RC4-encrypted with an embedded key. Good balance between size and variability.
• SUB/ADD Chain — Transforms each byte into a sequence of arithmetic operations. Avoids bad characters.
• Insertion Encoder — Inserts junk bytes between real bytes. The decoder filters them at runtime.
• Polymorphic XOR — Shikata_ga_nai style: dynamic key, variable decoder stub on each generation.
• Custom bad char avoidance — Specify prohibited bytes and the encoder avoids them automatically.
• Output formats — C array, Python bytes, raw binary, PowerShell byte array, C# byte array.