Dot NET Reflection

We can dynamically load arbitrary .NET programs through Reflection. The program must export public class and public static functions like the following:

using System;
namespace Agent
{
    public class Program
    {
        public static void Main(string[] args)
        {
            Console.WriteLine("[+] Code execution !");
        }
    }
}

Compile and generate .exe with csc.exe

csc.exe program.cs

In powershell, running this program in memory:

$path = "/path/to/file.exe"
[System.Reflection.Assembly]::Load([System.IO.File]::ReadAllBytes($path))
[Agent.Program]::Main("")

> [+] Code execution !