Fix a handle leak & change thread creation flag

lib/msf/core/post/windows/process.rb

@@ -21,7 +21,7 @@ module Process
 	#   true if successful, otherwise false
 	##
 	def execute_shellcode(shellcode, base_addr, pid=nil)
-		pid ||= session.sys.process.open.pid
+		pid ||= session.sys.process.getpid
 		host  = session.sys.process.open(pid.to_i, PROCESS_ALL_ACCESS)
 		shell_addr = host.memory.allocate(shellcode.length, nil, base_addr)
 		if host.memory.write(shell_addr, shellcode) < shellcode.length
@@ -30,19 +30,11 @@ module Process
 		end
 
 		vprint_status("Creating the thread to execute in 0x#{shell_addr.to_s(16)} (pid=#{pid.to_s})")
-		ret = session.railgun.kernel32.CreateThread(nil, 0, shell_addr, nil, "CREATE_SUSPENDED", nil)
+		ret = session.railgun.kernel32.CreateThread(nil, 0, shell_addr, nil, 0, nil)
 		if ret['return'] < 1
 			vprint_error("Unable to CreateThread")
 			return false
 		end
-		hthread = ret['return']
-
-		vprint_status("Resuming the Thread...")
-		ret = session.railgun.kernel32.ResumeThread(hthread)
-		if ret['return'] < 1
-			vprint_error("Unable to ResumeThread")
-			return false
-		end
 
 		true
 	end