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'
- LIKELY_PORTS =
[ 445 ]
- LIKELY_SERVICE_NAMES =
[ "smb" ]
- PRIVATE_TYPES =
[ :password, :ntlm_hash ]
- REALM_KEY =
Metasploit::Model::Realm::Key::ACTIVE_DIRECTORY_DOMAIN
Instance Attribute Summary collapse
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
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# File 'lib/metasploit/framework/login_scanner/smb.rb', line 53 def dispatcher @dispatcher 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.
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# File 'lib/metasploit/framework/login_scanner/smb.rb', line 63 def attempt_bogus_login(domain) if defined?(@result_for_bogus) return @result_for_bogus end cred = Credential.new( public: Rex::Text.rand_text_alpha(8), private: Rex::Text.rand_text_alpha(8), realm: domain ) @result_for_bogus = attempt_login(cred) end |
#attempt_login(credential) ⇒ Object
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# File 'lib/metasploit/framework/login_scanner/smb.rb', line 77 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 || "").force_encoding('UTF-8') username = (credential.public || "").force_encoding('UTF-8') password = (credential.private || "").force_encoding('UTF-8') client = RubySMB::Client.new(self.dispatcher, username: username, password: password, domain: realm) 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$") # Check to make sure we can write a file to this dir if tree..add_file == 1 access_level = AccessLevels::ADMINISTRATOR end rescue Exception => e client.tree_connect("\\\\#{host}\\IPC$") 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 => e status = Metasploit::Model::Login::Status::UNABLE_TO_CONNECT proof = e rescue RubySMB::Error::UnexpectedStatusCode => e status = Metasploit::Model::Login::Status::INCORRECT 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
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# File 'lib/metasploit/framework/login_scanner/smb.rb', line 152 def connect disconnect self.sock = super self.dispatcher = RubySMB::Dispatcher::Socket.new(self.sock) end |
#set_sane_defaults ⇒ Object
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# File 'lib/metasploit/framework/login_scanner/smb.rb', line 158 def set_sane_defaults self.connection_timeout = 10 if self.connection_timeout.nil? self.max_send_size = 0 if self.max_send_size.nil? self.send_delay = 0 if self.send_delay.nil? end |