Class: Rex::Post::Meterpreter::Ui::Console::CommandDispatcher::NetworkPug

Inherits:
Object
  • Object
show all
Includes:
Rex::Post::Meterpreter::Ui::Console::CommandDispatcher
Defined in:
lib/rex/post/meterpreter/ui/console/command_dispatcher/networkpug.rb

Overview

Rex::Ui::Text::IrbShell.new(binding).run

Constant Summary collapse

Klass =
Console::CommandDispatcher::NetworkPug
@@options =
Rex::Parser::Arguments.new(
  "-i" => [ true, "Interface on remote machine to listen on" ],
  "-f" => [ true, "Additional pcap filtering mechanism" ],
  "-v" => [ false, "Virtual NIC (packets only for your TAP dev locally)" ]
)

Instance Attribute Summary collapse

Attributes included from Ui::Text::DispatcherShell::CommandDispatcher

#shell, #tab_complete_items

Instance Method Summary collapse

Methods included from Rex::Post::Meterpreter::Ui::Console::CommandDispatcher

check_hash, #client, #log_error, #msf_loaded?, set_hash

Methods included from Ui::Text::DispatcherShell::CommandDispatcher

#cmd_help, #cmd_help_help, #cmd_help_tabs, #deprecated_cmd, #deprecated_commands, #deprecated_help, #help_to_s, #print, #print_error, #print_good, #print_line, #print_status, #print_warning, #tab_complete_filenames, #update_prompt

Constructor Details

#initialize(shell) ⇒ NetworkPug

Returns a new instance of NetworkPug


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# File 'lib/rex/post/meterpreter/ui/console/command_dispatcher/networkpug.rb', line 23

def initialize(shell)
  @thread_stuff = nil
  @tapdev = nil
  @channel = nil

  super
end

Instance Attribute Details

#channelObject

Returns the value of attribute channel


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# File 'lib/rex/post/meterpreter/ui/console/command_dispatcher/networkpug.rb', line 33

def channel
  @channel
end

#tapdevObject

Returns the value of attribute tapdev


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# File 'lib/rex/post/meterpreter/ui/console/command_dispatcher/networkpug.rb', line 32

def tapdev
  @tapdev
end

#thread_stuffObject

Returns the value of attribute thread_stuff


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# File 'lib/rex/post/meterpreter/ui/console/command_dispatcher/networkpug.rb', line 31

def thread_stuff
  @thread_stuff
end

Instance Method Details

#cmd_networkpug_start(*args) ⇒ Object


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# File 'lib/rex/post/meterpreter/ui/console/command_dispatcher/networkpug.rb', line 118

def cmd_networkpug_start(*args)
  # PKS - I suck at ruby ;\

  virtual_nic = false
  filter = nil
  interface = nil

  if(args.length == 0)
    args.unshift("-h")
  end

  @@options.parse(args) { |opt, idx, val|
    # print_line("before: #{opt} #{idx} #{val} || virtual nic: #{virtual_nic}, filter: #{filter}, interface: #{interface}")
    case opt
      when "-v"
        virtual_nic = true

      when "-f"
        filter = val

      when "-i"
        interface = val

      when "-h"
        print_error("Usage: networkpug_start -i interface [options]")
        print_error("")
        print_error(@@options.usage)
    end
    # print_line("after: #{opt} #{idx} #{val} || virtual nic: #{virtual_nic}, filter: #{filter}, interface: #{interface}")

  }

  if (interface == nil)
    print_error("Usage: networkpug_start -i interface [options]")
    print_error("")
    print_error(@@options.usage)
    return
  end

  @tapdev, tapname, mac = setup_tapdev

  if(@tapdev == nil)
    print_status("Failed to create tapdev")
    return
  end

  # PKS, we should implement multiple filter strings and let the
  # remote host build it properly.
  # not (our conn) and (virtual nic filter) and (custom filter)
  # print_line("before virtual, filter is #{filter}")

  if(filter == nil and virtual_nic == true)
    filter = "ether host #{mac}"
  elsif(filter != nil and virtual_nic == true)
    filter += " and ether host #{mac}"
    #print_line("Adjusted filter is #{filter}")
  end

  print_line("#{tapname} created with a hwaddr of #{mac}, ctrl-c when done")

  response, @channel = client.networkpug.networkpug_start(interface, filter)

  if(@channel)
    @thread_stuff = Rex::ThreadFactory.spawn("MeterpreterNetworkPUGReceiver", false) {
      proxy_packets()
    }

    print_line("Packet slinger for #{interface} has a thread structure of #{@thread_stuff}")
  end

  return true
end

#cmd_networkpug_stop(*args) ⇒ Object


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# File 'lib/rex/post/meterpreter/ui/console/command_dispatcher/networkpug.rb', line 191

def cmd_networkpug_stop(*args)
  interface = args[0]
  if (interface == nil)
    print_error("Usage: networkpug_stop [interface]")
    return
  end

  client.networkpug.networkpug_stop(interface)

  #print_line("client.networkpug.networkpug_stop returned")

  if(@thread_stuff)
    # print_line("killing thread")
    @thread_stuff.kill

    #print_line("joining thread")
    #@thread_stuff.join
    # meterpreter dies if i try to join.. not sure why.

    @thread_stuff = nil

    #print_line("closing tapdev")
    @tapdev.close

    #print_line("closing channel")
    #@channel.close
  end

  print_status("Packet slinging stopped on #{interface}")
  return true
end

#commandsObject

List of supported commands.


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# File 'lib/rex/post/meterpreter/ui/console/command_dispatcher/networkpug.rb', line 39

def commands
  {
    "networkpug_start" => "Start slinging packets between hosts",
    "networkpug_stop"  => "Stop slinging packets between hosts",
  }
end

#nameObject


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# File 'lib/rex/post/meterpreter/ui/console/command_dispatcher/networkpug.rb', line 223

def name
  "NetworkPug"
end

#proxy_packetsObject


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# File 'lib/rex/post/meterpreter/ui/console/command_dispatcher/networkpug.rb', line 77

def proxy_packets()
  while 1
    # Ghetto :\

    sd = Rex::ThreadSafe.select([ @channel.lsock, @tapdev ], nil, nil)

    sd[0].each { |s|
      if(s == @channel.lsock)	# Packet from remote host to local TAP dev
        len = @channel.lsock.read(2)
        len = len.unpack('n')[0]

        #print_line("Got #{len} bytes from remote host's network")

        if(len > 1514 or len == 0)
          @tapdev.close()
          print_line("length is invalid .. #{len} ?, de-synchronized ? ")
        end

        packet = @channel.lsock.read(len)

        print_line("packet from remote host:\n" + Rex::Text.hexify(packet))

        @tapdev.syswrite(packet)

      elsif(s == @tapdev)
        # Packet from tapdev to remote host network

        packet = @tapdev.sysread(1514)

        print_line("packet to remote host:\n" + Rex::Text.hexify(packet))

        @channel.write(packet)
      end
    } if(sd)

    if(not sd)
      print_line("hmmm. ")
    end
  end
end

#setup_tapdevObject


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# File 'lib/rex/post/meterpreter/ui/console/command_dispatcher/networkpug.rb', line 46

def setup_tapdev
  # XXX, look at how to use windows equivilient and include

  tapdev = ::File.open("/dev/net/tun", "wb+")

  0.upto(16) { |idx|
    name = "npug#{idx}"

    ifreq = [ name, 0x1000 | 0x02, "" ].pack("a16va14")

    begin
      tapdev.ioctl(0x400454ca, ifreq)		# is there a better way than hex constant
    rescue Errno::EBUSY
      next
    end

    ifreq = [ name ].pack("a32")

    tapdev.ioctl(0x8927, ifreq)

    # print_line(Rex::Text.hexify(ifreq))

    mac = sprintf("%02x:%02x:%02x:%02x:%02x:%02x", ifreq[18], ifreq[19], ifreq[20], ifreq[21], ifreq[22], ifreq[23])

    return tapdev, name, mac
  }

  tapdev.close()
  return nil, nil, nil
end