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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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class MetasploitModule < Msf::Post
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  include Msf::Auxiliary::Report
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  include Msf::Post::Windows::LDAP
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  #  include Msf::Post::Windows::Accounts
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  USER_FIELDS = [
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    'name',
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    'distinguishedname',
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    'description'
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  ].freeze
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  def initialize(info = {})
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    super(
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      update_info(
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        info,
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        'Name' => 'Windows Gather Active Directory Groups',
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        'Description' => %q{
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          This module will enumerate AD groups on the specified domain.
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        },
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        'License' => MSF_LICENSE,
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        'Author' => [
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          'Stuart Morgan <stuart.morgan[at]mwrinfosecurity.com>'
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        ],
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        'Platform' => [ 'win' ],
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        'SessionTypes' => [ 'meterpreter' ]
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      )
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    )
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    register_options([
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      OptString.new('ADDITIONAL_FIELDS', [false, 'Additional fields to retrieve, comma separated', nil]),
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      OptString.new('FILTER', [false, 'Customised LDAP filter', nil])
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    ])
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  end
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  def run
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    @user_fields = USER_FIELDS.dup
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    if datastore['ADDITIONAL_FIELDS']
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      additional_fields = datastore['ADDITIONAL_FIELDS'].gsub(/\s+/, '').split(',')
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      @user_fields.push(*additional_fields)
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    end
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    max_search = datastore['MAX_SEARCH']
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    begin
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      f = ''
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      f = "(#{datastore['FILTER']})" if datastore['FILTER']
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      q = query("(&(objectClass=group)#{f})", max_search, @user_fields)
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    rescue ::RuntimeError, ::Rex::Post::Meterpreter::RequestError => e
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      # Can't bind or in a network w/ limited accounts
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      print_error(e.message)
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      return
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    end
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    if q.nil? || q[:results].empty?
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      print_status('No results returned.')
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    else
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      results_table = parse_results(q[:results])
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      print_line results_table.to_s
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    end
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  end
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  # Takes the results of LDAP query, parses them into a table
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  # and records and usernames as {Metasploit::Credential::Core}s in
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  # the database.
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  #
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  # @param results [Array<Array<Hash>>] The LDAP query results to parse
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  # @return [Rex::Text::Table] The table containing all the result data
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  def parse_results(results)
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    # Results table holds raw string data
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    results_table = Rex::Text::Table.new(
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      'Header' => 'Domain Groups',
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      'Indent' => 1,
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      'SortIndex' => -1,
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      'Columns' => @user_fields
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    )
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    results.each do |result|
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      row = []
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      result.each do |field|
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        if field.nil?
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          row << ''
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        else
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          row << field[:value]
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        end
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      end
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      results_table << row
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    end
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    results_table
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  end
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end
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