Class: Metasploit::Framework::LoginScanner::SMB
- Inherits:
-
Object
- Object
- Metasploit::Framework::LoginScanner::SMB
- Includes:
- Base, RexSocket, Tcp::Client
- Defined in:
- lib/metasploit/framework/login_scanner/smb.rb
Overview
This is the LoginScanner class for dealing with the Server Messaging Block protocol.
Defined Under Namespace
Modules: AccessLevels, StatusCodes
Constant Summary collapse
- CAN_GET_SESSION =
true
- DEFAULT_REALM =
'WORKSTATION'.freeze
- LIKELY_PORTS =
[ 445 ].freeze
- LIKELY_SERVICE_NAMES =
[ 'smb' ].freeze
- PRIVATE_TYPES =
%i[password ntlm_hash].freeze
- REALM_KEY =
Metasploit::Model::Realm::Key::ACTIVE_DIRECTORY_DOMAIN
Instance Attribute Summary collapse
- #dispatcher ⇒ RubySMB::Dispatcher::Socket
-
#kerberos_authenticator_factory ⇒ Func<username, password, realm> : Msf::Exploit::Remote::Kerberos::ServiceAuthenticator::SMB
A factory method for creating a kerberos authenticator.
Attributes included from Tcp::Client
#max_send_size, #send_delay, #sock
Instance Method Summary collapse
-
#attempt_bogus_login(domain) ⇒ Result
If login is successul and Result#access_level is not set then arbitrary credentials are accepted.
- #attempt_login(credential) ⇒ Object
- #connect ⇒ Object
- #set_sane_defaults ⇒ Object
Methods included from Tcp::Client
#chost, #cport, #disconnect, #proxies, #rhost, #rport, #set_tcp_evasions, #ssl, #ssl_version
Instance Attribute Details
#dispatcher ⇒ RubySMB::Dispatcher::Socket
53 54 55 |
# File 'lib/metasploit/framework/login_scanner/smb.rb', line 53 def dispatcher @dispatcher end |
#kerberos_authenticator_factory ⇒ Func<username, password, realm> : Msf::Exploit::Remote::Kerberos::ServiceAuthenticator::SMB
Returns A factory method for creating a kerberos authenticator.
58 59 60 |
# File 'lib/metasploit/framework/login_scanner/smb.rb', line 58 def kerberos_authenticator_factory @kerberos_authenticator_factory end |
Instance Method Details
#attempt_bogus_login(domain) ⇒ Result
If login is successul and Result#access_level is not set then arbitrary credentials are accepted. If it is set to Guest, then arbitrary credentials are accepted, but given Guest permissions.
68 69 70 71 72 73 74 75 76 77 78 79 |
# File 'lib/metasploit/framework/login_scanner/smb.rb', line 68 def attempt_bogus_login(domain) if defined?(@attempt_bogus_login) return @attempt_bogus_login end cred = Credential.new( public: Rex::Text.rand_text_alpha(8), private: Rex::Text.rand_text_alpha(8), realm: domain ) @attempt_bogus_login = attempt_login(cred) end |
#attempt_login(credential) ⇒ Object
82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 |
# File 'lib/metasploit/framework/login_scanner/smb.rb', line 82 def attempt_login(credential) begin connect rescue ::Rex::ConnectionError => e result = Result.new( credential: credential, status: Metasploit::Model::Login::Status::UNABLE_TO_CONNECT, proof: e, host: host, port: port, protocol: 'tcp', service_name: 'smb' ) return result end proof = nil begin realm = (credential.realm || '').dup.force_encoding('UTF-8') username = (credential.public || '').dup.force_encoding('UTF-8') password = (credential.private || '').dup.force_encoding('UTF-8') client = RubySMB::Client.new(dispatcher, username: username, password: password, domain: realm) if kerberos_authenticator_factory client.extend(Msf::Exploit::Remote::SMB::Client::KerberosAuthentication) client.kerberos_authenticator = kerberos_authenticator_factory.call(username, password, realm) end status_code = client.login if status_code == WindowsError::NTStatus::STATUS_SUCCESS # Windows SMB will return an error code during Session # Setup, but nix Samba requires a Tree Connect. Try admin$ # first, since that will tell us if this user has local # admin access. Fall back to IPC$ which should be accessible # to any user with valid creds. begin tree = client.tree_connect("\\\\#{host}\\admin$") # Check to make sure we can write a file to this dir if tree..add_file == 1 access_level = AccessLevels::ADMINISTRATOR end rescue StandardError => _e client.tree_connect("\\\\#{host}\\IPC$") end end case status_code when WindowsError::NTStatus::STATUS_SUCCESS, WindowsError::NTStatus::STATUS_PASSWORD_MUST_CHANGE, WindowsError::NTStatus::STATUS_PASSWORD_EXPIRED status = Metasploit::Model::Login::Status::SUCCESSFUL when WindowsError::NTStatus::STATUS_ACCOUNT_LOCKED_OUT status = Metasploit::Model::Login::Status::LOCKED_OUT when WindowsError::NTStatus::STATUS_LOGON_FAILURE, WindowsError::NTStatus::STATUS_ACCESS_DENIED status = Metasploit::Model::Login::Status::INCORRECT when *StatusCodes::CORRECT_CREDENTIAL_STATUS_CODES status = Metasploit::Model::Login::Status::DENIED_ACCESS else status = Metasploit::Model::Login::Status::INCORRECT end rescue ::Rex::ConnectionError, Errno::EINVAL, RubySMB::Error::NetBiosSessionService, RubySMB::Error::NegotiationFailure, RubySMB::Error::CommunicationError => e status = Metasploit::Model::Login::Status::UNABLE_TO_CONNECT proof = e rescue RubySMB::Error::UnexpectedStatusCode => _e status = Metasploit::Model::Login::Status::INCORRECT rescue Rex::Proto::Kerberos::Model::Error::KerberosError => e status = Metasploit::Framework::LoginScanner::Kerberos.login_status_for_kerberos_error(e) proof = e rescue RubySMB::Error::RubySMBError => _e status = Metasploit::Model::Login::Status::UNABLE_TO_CONNECT proof = e ensure client.disconnect! if client end if status == Metasploit::Model::Login::Status::SUCCESSFUL && credential.public.empty? access_level ||= AccessLevels::GUEST end result = Result.new(credential: credential, status: status, proof: proof, access_level: access_level) result.host = host result.port = port result.protocol = 'tcp' result.service_name = 'smb' result end |
#connect ⇒ Object
168 169 170 171 172 |
# File 'lib/metasploit/framework/login_scanner/smb.rb', line 168 def connect disconnect self.sock = super self.dispatcher = RubySMB::Dispatcher::Socket.new(sock) end |
#set_sane_defaults ⇒ Object
174 175 176 177 178 |
# File 'lib/metasploit/framework/login_scanner/smb.rb', line 174 def set_sane_defaults self.connection_timeout = 10 if connection_timeout.nil? self.max_send_size = 0 if max_send_size.nil? self.send_delay = 0 if send_delay.nil? end |