Add another ref about the technique

modules/exploits/windows/local/trusted_service_path.rb

@@ -31,10 +31,14 @@ class Metasploit3 < Msf::Exploit::Local
 				of these unexpected paths, sometimes escalate privileges if run as SYSTEM.
 				Some softwares such as OpenVPN 2.1.1, or OpenSSH Server 5, etc... all have the
 				same problem.
+
+				The offensive technique is also described in Writing Secure Code (2nd Edition),
+				Chapter 23, in the section "Calling Processes Security" on page 676.
 			},
 			'References'     =>
 				[
-					['URL', 'http://msdn.microsoft.com/en-us/library/windows/desktop/ms682425(v=vs.85).aspx']
+					['URL', 'http://msdn.microsoft.com/en-us/library/windows/desktop/ms682425(v=vs.85).aspx'],
+					['URL', 'http://www.microsoft.com/learning/en/us/book.aspx?id=5957&locale=en-us']  #pg 676
 				],
 			'DisclosureDate' => "Oct 25 2001",
 			'License'        => MSF_LICENSE,
@@ -136,7 +140,7 @@ class Metasploit3 < Msf::Exploit::Local
 				print_error("Unable to start #{svr_name}")
 				return
 			else
-				tried = true	
+				tried = true
 			end
 
 			case s.message