Class: Rex::Proto::NTLM::Utils
- Inherits:
-
Object
- Object
- Rex::Proto::NTLM::Utils
- Defined in:
- lib/rex/proto/ntlm/utils.rb
Class Method Summary collapse
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.asn1encode(str = '') ⇒ Object
Prepends an ASN1 formatted length field to a piece of data.
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.create_lm_ntlm_responses(user, pass, challenge_key, domain = '', default_name = '', default_domain = '', dns_host_name = '', dns_domain_name = '', chall_MsvAvTimestamp = nil, spnopt = {}, opt = {}) ⇒ Object
create lm/ntlm responses.
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.create_session_key(ntlmssp_flags, server_ntlmssp_flags, user, pass, domain, challenge_key, client_challenge = '', ntlm_cli_challenge = '', opt = {}) ⇒ Object
create the session key.
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.is_pass_ntlm_hash?(str) ⇒ Boolean
Determine whether the password is a known hash format.
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.make_negotiate_secblob_resp(account, domain) ⇒ Object
GSS BLOB useful for SMB_NEGOCIATE_RESPONSE message mechTypes: 4 items : MechType: 1.2.840.48018.1.2.2 (MS KRB5 - Microsoft Kerberos 5) MechType: 1.2.840.113554.1.2.2 (KRB5 - Kerberos 5) MechType: 1.2.840.113554.1.2.2.3 (KRB5 - Kerberos 5 - User to User) MechType: 1.3.6.1.4.1.311.2.2.10 (NTLMSSP - Microsoft NTLM Security Support Provider) mechListMIC: principal: account@domain.
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.make_ntlm_flags(opt = {}) ⇒ Object
Return the correct ntlmflags upon the configuration.
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.make_ntlmssp_blob_auth(domain, name, user, lm, ntlm, enc_session_key, flags = 0x080201) ⇒ Object
BLOB without GSS Useful for ntlmssp type 3 message.
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.make_ntlmssp_blob_chall(win_domain, win_name, dns_domain, dns_name, chall, flags) ⇒ Object
BLOB without GSS useful for ntlm type 2 message.
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.make_ntlmssp_blob_init(domain = 'WORKGROUP', name = 'WORKSTATION', flags = 0x80201) ⇒ Object
BLOB without GSS useful for ntlmssp type 1 message.
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.make_ntlmssp_secblob_auth(domain, name, user, lm, ntlm, enc_session_key, flags = 0x080201) ⇒ Object
GSS BLOB Useful for ntlmssp type 3 message.
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.make_ntlmssp_secblob_chall(win_domain, win_name, dns_domain, dns_name, chall, flags) ⇒ Object
GSS BLOB useful for ntlmssp type 2 message.
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.make_ntlmssp_secblob_init(domain = 'WORKGROUP', name = 'WORKSTATION', flags = 0x80201) ⇒ Object
GSS BLOB useful for ntlmssp type 1 message.
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.make_ntlmv2_clientchallenge(win_domain, win_name, dns_domain, dns_name, client_challenge = nil, chall_MsvAvTimestamp = nil, spnopt = {}) ⇒ Object
This function return an ntlmv2 client challenge This is a partial implementation, full description is in [MS-NLMP].pdf around 3.1.5.2.1 :-/.
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.make_ntlmv2_secblob_success ⇒ Object
GSS BLOB Useful for SMB Success.
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.make_simple_negotiate_secblob_resp ⇒ Object
GSS BLOB useful for SMB_NEGOCIATE_RESPONSE message mechTypes: 2 items : -MechType: 1.3.6.1.4.1.311.2.2.30 (SNMPv2-SMI::enterprises.311.2.2.30) -MechType: 1.3.6.1.4.1.311.2.2.10 (NTLMSSP - Microsoft NTLM Security Support Provider).
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.parse_ntlm_type_2_blob(blob) ⇒ Object
Parse an ntlm type 2 challenge blob and return useful data.
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.time_unix_to_smb(unix_time) ⇒ Object
duplicate from lib/rex/proto/smb/utils cause we only need this function from Rex::Proto::SMB::Utils Convert a unix timestamp to a 64-bit signed server time.
Class Method Details
.asn1encode(str = '') ⇒ Object
Prepends an ASN1 formatted length field to a piece of data
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# File 'lib/rex/proto/ntlm/utils.rb', line 23 def self.asn1encode(str = '') res = '' # If the high bit of the first byte is 1, it contains the number of # length bytes that follow case str.length when 0 .. 0x7F res = [str.length].pack('C') + str when 0x80 .. 0xFF res = [0x81, str.length].pack('CC') + str when 0x100 .. 0xFFFF res = [0x82, str.length].pack('Cn') + str when 0x10000 .. 0xffffff res = [0x83, str.length >> 16, str.length & 0xFFFF].pack('CCn') + str when 0x1000000 .. 0xffffffff res = [0x84, str.length].pack('CN') + str else raise "ASN1 str too long" end return res end |
.create_lm_ntlm_responses(user, pass, challenge_key, domain = '', default_name = '', default_domain = '', dns_host_name = '', dns_domain_name = '', chall_MsvAvTimestamp = nil, spnopt = {}, opt = {}) ⇒ Object
create lm/ntlm responses
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# File 'lib/rex/proto/ntlm/utils.rb', line 478 def self.create_lm_ntlm_responses(user, pass, challenge_key, domain = '', default_name = '', default_domain = '', dns_host_name = '', dns_domain_name = '', chall_MsvAvTimestamp = nil, spnopt = {}, opt = {} ) usentlm2_session = opt[:usentlm2_session] != nil ? opt[:usentlm2_session] : true use_ntlmv2 = opt[:use_ntlmv2] != nil ? opt[:use_ntlmv2] : false send_lm = opt[:send_lm] != nil ? opt[:send_lm] : true send_ntlm = opt[:send_ntlm] != nil ? opt[:send_ntlm] : true #calculate the lm/ntlm response resp_lm = "\x00" * 24 resp_ntlm = "\x00" * 24 client_challenge = Rex::Text.rand_text(8) ntlm_cli_challenge = '' if send_ntlm #should be default if usentlm2_session if use_ntlmv2 ntlm_cli_challenge = self.make_ntlmv2_clientchallenge( default_domain, default_name, dns_domain_name, dns_host_name,client_challenge, chall_MsvAvTimestamp, spnopt) if self.is_pass_ntlm_hash?(pass) argntlm = { :ntlmv2_hash => Rex::Proto::NTLM::Crypt::ntlmv2_hash( user, [ pass.upcase()[33,65] ].pack('H32'), domain,{:pass_is_hash => true} ), :challenge => challenge_key } else argntlm = { :ntlmv2_hash => Rex::Proto::NTLM::Crypt::ntlmv2_hash(user, pass, domain), :challenge => challenge_key } end optntlm = { :nt_client_challenge => ntlm_cli_challenge} ntlmv2_response = Rex::Proto::NTLM::Crypt::ntlmv2_response(argntlm,optntlm) resp_ntlm = ntlmv2_response if send_lm if self.is_pass_ntlm_hash?(pass) arglm = { :ntlmv2_hash => Rex::Proto::NTLM::Crypt::ntlmv2_hash( user, [ pass.upcase()[33,65] ].pack('H32'), domain,{:pass_is_hash => true} ), :challenge => challenge_key } else arglm = { :ntlmv2_hash => Rex::Proto::NTLM::Crypt::ntlmv2_hash(user,pass, domain), :challenge => challenge_key } end optlm = { :client_challenge => client_challenge } resp_lm = Rex::Proto::NTLM::Crypt::lmv2_response(arglm, optlm) else resp_lm = "\x00" * 24 end else # ntlm2_session if self.is_pass_ntlm_hash?(pass) argntlm = { :ntlm_hash => [ pass.upcase()[33,65] ].pack('H32'), :challenge => challenge_key } else argntlm = { :ntlm_hash => Rex::Proto::NTLM::Crypt::ntlm_hash(pass), :challenge => challenge_key } end optntlm = { :client_challenge => client_challenge} resp_ntlm = Rex::Proto::NTLM::Crypt::ntlm2_session(argntlm,optntlm).join[24,24] # Generate the fake LANMAN hash resp_lm = client_challenge + ("\x00" * 16) end else # we use lmv1/ntlmv1 if self.is_pass_ntlm_hash?(pass) argntlm = { :ntlm_hash => [ pass.upcase()[33,65] ].pack('H32'), :challenge => challenge_key } else argntlm = { :ntlm_hash => Rex::Proto::NTLM::Crypt::ntlm_hash(pass), :challenge => challenge_key } end resp_ntlm = Rex::Proto::NTLM::Crypt::ntlm_response(argntlm) if send_lm if self.is_pass_ntlm_hash?(pass) arglm = { :lm_hash => [ pass.upcase()[0,32] ].pack('H32'), :challenge => challenge_key } else arglm = { :lm_hash => Rex::Proto::NTLM::Crypt::lm_hash(pass), :challenge => challenge_key } end resp_lm = Rex::Proto::NTLM::Crypt::lm_response(arglm) else #when windows does not send lm in ntlmv1 type response, # it gives lm response the same value as ntlm response resp_lm = resp_ntlm end end else #send_ntlm = false #lmv2 if usentlm2_session && use_ntlmv2 if self.is_pass_ntlm_hash?(pass) arglm = { :ntlmv2_hash => Rex::Proto::NTLM::Crypt::ntlmv2_hash( user, [ pass.upcase()[33,65] ].pack('H32'), domain,{:pass_is_hash => true} ), :challenge => challenge_key } else arglm = { :ntlmv2_hash => Rex::Proto::NTLM::Crypt::ntlmv2_hash(user,pass, domain), :challenge => challenge_key } end optlm = { :client_challenge => client_challenge } resp_lm = Rex::Proto::NTLM::Crypt::lmv2_response(arglm, optlm) else if self.is_pass_ntlm_hash?(pass) arglm = { :lm_hash => [ pass.upcase()[0,32] ].pack('H32'), :challenge => challenge_key } else arglm = { :lm_hash => Rex::Proto::NTLM::Crypt::lm_hash(pass), :challenge => challenge_key } end resp_lm = Rex::Proto::NTLM::Crypt::lm_response(arglm) end resp_ntlm = "" end return resp_lm, resp_ntlm, client_challenge, ntlm_cli_challenge end |
.create_session_key(ntlmssp_flags, server_ntlmssp_flags, user, pass, domain, challenge_key, client_challenge = '', ntlm_cli_challenge = '', opt = {}) ⇒ Object
create the session key
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# File 'lib/rex/proto/ntlm/utils.rb', line 636 def self.create_session_key(ntlmssp_flags, server_ntlmssp_flags, user, pass, domain, challenge_key, client_challenge = '', ntlm_cli_challenge = '' , opt = {} ) usentlm2_session = opt[:usentlm2_session] != nil ? opt[:usentlm2_session] : true use_ntlmv2 = opt[:use_ntlmv2] != nil ? opt[:use_ntlmv2] : false send_lm = opt[:send_lm] != nil ? opt[:send_lm] : true send_ntlm = opt[:send_ntlm] != nil ? opt[:send_ntlm] : true use_lanman_key = opt[:use_lanman_key] != nil ? opt[:use_lanman_key] : false # Create the sessionkey (aka signing key, aka mackey) and encrypted session key # Server will decide for key_size and key_exchange enc_session_key = '' signing_key = '' # Set default key size and key exchange values key_size = 40 key_exchange = false # Remove ntlmssp.negotiate56 ntlmssp_flags &= 0x7fffffff # Remove ntlmssp.negotiatekeyexch ntlmssp_flags &= 0xbfffffff # Remove ntlmssp.negotiate128 ntlmssp_flags &= 0xdfffffff # Check the keyexchange if server_ntlmssp_flags & Rex::Proto::NTLM::Constants::NEGOTIATE_KEY_EXCH != 0 then key_exchange = true ntlmssp_flags |= Rex::Proto::NTLM::Constants::NEGOTIATE_KEY_EXCH end # Check 128bits if server_ntlmssp_flags & Rex::Proto::NTLM::Constants::NEGOTIATE_128 != 0 then key_size = 128 ntlmssp_flags |= Rex::Proto::NTLM::Constants::NEGOTIATE_128 ntlmssp_flags |= Rex::Proto::NTLM::Constants::NEGOTIATE_56 # Check 56bits else if server_ntlmssp_flags & Rex::Proto::NTLM::Constants::NEGOTIATE_56 != 0 then key_size = 56 ntlmssp_flags |= Rex::Proto::NTLM::Constants::NEGOTIATE_56 end end # Generate the user session key lanman_weak = false if send_ntlm # Should be default if usentlm2_session if use_ntlmv2 if self.is_pass_ntlm_hash?(pass) user_session_key = Rex::Proto::NTLM::Crypt::ntlmv2_user_session_key(user, [ pass.upcase()[33,65] ].pack('H32'), domain, challenge_key, ntlm_cli_challenge, {:pass_is_hash => true}) else user_session_key = Rex::Proto::NTLM::Crypt::ntlmv2_user_session_key(user, pass, domain, challenge_key, ntlm_cli_challenge) end else if self.is_pass_ntlm_hash?(pass) user_session_key = Rex::Proto::NTLM::Crypt::ntlm2_session_user_session_key([ pass.upcase()[33,65] ].pack('H32'), challenge_key, client_challenge, {:pass_is_hash => true}) else user_session_key = Rex::Proto::NTLM::Crypt::ntlm2_session_user_session_key(pass, challenge_key, client_challenge) end end else # lmv1/ntlmv1 # lanman_key may also be used without ntlm response but it is not so much used # so we don't care about this feature if send_lm && use_lanman_key if self.is_pass_ntlm_hash?(pass) user_session_key = Rex::Proto::NTLM::Crypt::lanman_session_key([ pass.upcase()[0,32] ].pack('H32'), challenge_key, {:pass_is_hash => true}) else user_session_key = Rex::Proto::NTLM::Crypt::lanman_session_key(pass, challenge_key) end lanman_weak = true else if self.is_pass_ntlm_hash?(pass) user_session_key = Rex::Proto::NTLM::Crypt::ntlmv1_user_session_key([ pass.upcase()[33,65] ].pack('H32'), {:pass_is_hash => true}) else user_session_key = Rex::Proto::NTLM::Crypt::ntlmv1_user_session_key(pass) end end end else if usentlm2_session && use_ntlmv2 if self.is_pass_ntlm_hash?(pass) user_session_key = Rex::Proto::NTLM::Crypt::lmv2_user_session_key(user, [ pass.upcase()[33,65] ].pack('H32'), domain, challenge_key, client_challenge, {:pass_is_hash => true}) else user_session_key = Rex::Proto::NTLM::Crypt::lmv2_user_session_key(user, pass, domain, challenge_key, client_challenge) end else if self.is_pass_ntlm_hash?(pass) user_session_key = Rex::Proto::NTLM::Crypt::lmv1_user_session_key([ pass.upcase()[0,32] ].pack('H32'), {:pass_is_hash => true}) else user_session_key = Rex::Proto::NTLM::Crypt::lmv1_user_session_key(pass) end end end user_session_key = Rex::Proto::NTLM::Crypt::make_weak_sessionkey(user_session_key,key_size, lanman_weak) # Sessionkey and encrypted session key if key_exchange signing_key = Rex::Text.rand_text(16) enc_session_key = Rex::Proto::NTLM::Crypt::encrypt_sessionkey(signing_key, user_session_key) else signing_key = user_session_key end return signing_key, enc_session_key, ntlmssp_flags end |
.is_pass_ntlm_hash?(str) ⇒ Boolean
Determine whether the password is a known hash format
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# File 'lib/rex/proto/ntlm/utils.rb', line 16 def self.is_pass_ntlm_hash?(str) str.downcase =~ /^[0-9a-f]{32}:[0-9a-f]{32}$/ end |
.make_negotiate_secblob_resp(account, domain) ⇒ Object
GSS BLOB useful for SMB_NEGOCIATE_RESPONSE message mechTypes: 4 items : MechType: 1.2.840.48018.1.2.2 (MS KRB5 - Microsoft Kerberos 5) MechType: 1.2.840.113554.1.2.2 (KRB5 - Kerberos 5) MechType: 1.2.840.113554.1.2.2.3 (KRB5 - Kerberos 5 - User to User) MechType: 1.3.6.1.4.1.311.2.2.10 (NTLMSSP - Microsoft NTLM Security Support Provider) mechListMIC: principal: account@domain
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# File 'lib/rex/proto/ntlm/utils.rb', line 84 def self.make_negotiate_secblob_resp(account, domain) blob = "\x60" + self.asn1encode( "\x06" + self.asn1encode( "\x2b\x06\x01\x05\x05\x02" ) + "\xa0" + self.asn1encode( "\x30" + self.asn1encode( "\xa0" + self.asn1encode( "\x30" + self.asn1encode( "\x06" + self.asn1encode( "\x2a\x86\x48\x82\xf7\x12\x01\x02\x02" ) + "\x06" + self.asn1encode( "\x2a\x86\x48\x86\xf7\x12\x01\x02\x02" ) + "\x06" + self.asn1encode( "\x2a\x86\x48\x86\xf7\x12\x01\x02\x02\x03" ) + "\x06" + self.asn1encode( "\x2b\x06\x01\x04\x01\x82\x37\x02\x02\x0a" ) ) ) + "\xa3" + self.asn1encode( "\x30" + self.asn1encode( "\xa0" + self.asn1encode( "\x1b" + self.asn1encode( account + '@' + domain ) ) ) ) ) ) ) return blob end |
.make_ntlm_flags(opt = {}) ⇒ Object
Return the correct ntlmflags upon the configuration
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# File 'lib/rex/proto/ntlm/utils.rb', line 328 def self.make_ntlm_flags(opt = {}) signing = opt[:signing] != nil ? opt[:signing] : false usentlm2_session = opt[:usentlm2_session] != nil ? opt[:usentlm2_session] : true use_ntlmv2 = opt[:use_ntlmv2] != nil ? opt[:use_ntlmv2] : false send_lm = opt[:send_lm] != nil ? opt[:send_lm] : true send_ntlm = opt[:send_ntlm] != nil ? opt[:send_ntlm] : true use_lanman_key = opt[:use_lanman_key] != nil ? opt[:use_lanman_key] : false if signing ntlmssp_flags = 0xe2088215 else ntlmssp_flags = 0xa2080205 end if usentlm2_session if use_ntlmv2 #set Negotiate Target Info ntlmssp_flags |= Rex::Proto::NTLM::Constants::NEGOTIATE_TARGET_INFO end else #remove the ntlm2_session flag ntlmssp_flags &= 0xfff7ffff #set lanmanflag only when lm and ntlm are sent if send_lm ntlmssp_flags |= Rex::Proto::NTLM::Constants::NEGOTIATE_LMKEY if use_lanman_key end end #we can also downgrade ntlm2_session when we send only lmv1 ntlmssp_flags &= 0xfff7ffff if usentlm2_session && (not use_ntlmv2) && (not send_ntlm) return ntlmssp_flags end |
.make_ntlmssp_blob_auth(domain, name, user, lm, ntlm, enc_session_key, flags = 0x080201) ⇒ Object
BLOB without GSS Useful for ntlmssp type 3 message
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# File 'lib/rex/proto/ntlm/utils.rb', line 233 def self.make_ntlmssp_blob_auth(domain, name, user, lm, ntlm, enc_session_key, flags = 0x080201) lm ||= "\x00" * 24 ntlm ||= "\x00" * 24 domain_uni = Rex::Text.to_unicode(domain) user_uni = Rex::Text.to_unicode(user) name_uni = Rex::Text.to_unicode(name) session = enc_session_key ptr = 64 blob = "NTLMSSP\x00" + [ 3 ].pack('V') + [ # Lan Manager Response lm.length, lm.length, (ptr) ].pack('vvV') + [ # NTLM Manager Response ntlm.length, ntlm.length, (ptr += lm.length) ].pack('vvV') + [ # Domain Name domain_uni.length, domain_uni.length, (ptr += ntlm.length) ].pack('vvV') + [ # Username user_uni.length, user_uni.length, (ptr += domain_uni.length) ].pack('vvV') + [ # Hostname name_uni.length, name_uni.length, (ptr += user_uni.length) ].pack('vvV') + [ # Session Key (none) session.length, session.length, (ptr += name_uni.length) ].pack('vvV') + [ flags ].pack('V') + lm + ntlm + domain_uni + user_uni + name_uni + session + "\x00" return blob end |
.make_ntlmssp_blob_chall(win_domain, win_name, dns_domain, dns_name, chall, flags) ⇒ Object
BLOB without GSS useful for ntlm type 2 message
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# File 'lib/rex/proto/ntlm/utils.rb', line 175 def self.make_ntlmssp_blob_chall(win_domain, win_name, dns_domain, dns_name, chall, flags) addr_list = '' addr_list << [2, win_domain.length].pack('vv') + win_domain addr_list << [1, win_name.length].pack('vv') + win_name addr_list << [4, dns_domain.length].pack('vv') + dns_domain addr_list << [3, dns_name.length].pack('vv') + dns_name addr_list << [0, 0].pack('vv') ptr = 0 blob = "NTLMSSP\x00" + [2].pack('V') + [ win_domain.length, # length win_domain.length, # max length (ptr += 48) # offset ].pack('vvV') + [ flags ].pack('V') + chall + "\x00\x00\x00\x00\x00\x00\x00\x00" + [ addr_list.length, # length addr_list.length, # max length (ptr += win_domain.length) ].pack('vvV') + win_domain + addr_list return blob end |
.make_ntlmssp_blob_init(domain = 'WORKGROUP', name = 'WORKSTATION', flags = 0x80201) ⇒ Object
BLOB without GSS useful for ntlmssp type 1 message
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# File 'lib/rex/proto/ntlm/utils.rb', line 125 def self.make_ntlmssp_blob_init(domain = 'WORKGROUP', name = 'WORKSTATION', flags=0x80201) blob = "NTLMSSP\x00" + [1, flags].pack('VV') + [ domain.length, #length domain.length, #max length 32 ].pack('vvV') + [ name.length, #length name.length, #max length domain.length + 32 ].pack('vvV') + domain + name return blob end |
.make_ntlmssp_secblob_auth(domain, name, user, lm, ntlm, enc_session_key, flags = 0x080201) ⇒ Object
GSS BLOB Useful for ntlmssp type 3 message
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# File 'lib/rex/proto/ntlm/utils.rb', line 296 def self.make_ntlmssp_secblob_auth(domain, name, user, lm, ntlm, enc_session_key, flags = 0x080201) blob = "\xa1" + self.asn1encode( "\x30" + self.asn1encode( "\xa2" + self.asn1encode( "\x04" + self.asn1encode( make_ntlmssp_blob_auth(domain, name, user, lm, ntlm, enc_session_key, flags ) ) ) ) ) return blob end |
.make_ntlmssp_secblob_chall(win_domain, win_name, dns_domain, dns_name, chall, flags) ⇒ Object
GSS BLOB useful for ntlmssp type 2 message
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# File 'lib/rex/proto/ntlm/utils.rb', line 206 def self.make_ntlmssp_secblob_chall(win_domain, win_name, dns_domain, dns_name, chall, flags) blob = "\xa1" + self.asn1encode( "\x30" + self.asn1encode( "\xa0" + self.asn1encode( "\x0a" + self.asn1encode( "\x01" ) ) + "\xa1" + self.asn1encode( "\x06" + self.asn1encode( "\x2b\x06\x01\x04\x01\x82\x37\x02\x02\x0a" ) ) + "\xa2" + self.asn1encode( "\x04" + self.asn1encode( make_ntlmssp_blob_chall(win_domain, win_name, dns_domain, dns_name, chall, flags) ) ) ) ) return blob end |
.make_ntlmssp_secblob_init(domain = 'WORKGROUP', name = 'WORKSTATION', flags = 0x80201) ⇒ Object
GSS BLOB useful for ntlmssp type 1 message
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# File 'lib/rex/proto/ntlm/utils.rb', line 146 def self.make_ntlmssp_secblob_init(domain = 'WORKGROUP', name = 'WORKSTATION', flags=0x80201) blob = "\x60" + self.asn1encode( "\x06" + self.asn1encode( "\x2b\x06\x01\x05\x05\x02" ) + "\xa0" + self.asn1encode( "\x30" + self.asn1encode( "\xa0" + self.asn1encode( "\x30" + self.asn1encode( "\x06" + self.asn1encode( "\x2b\x06\x01\x04\x01\x82\x37\x02\x02\x0a" ) ) ) + "\xa2" + self.asn1encode( "\x04" + self.asn1encode( make_ntlmssp_blob_init(domain, name, flags) ) ) ) ) ) return blob end |
.make_ntlmv2_clientchallenge(win_domain, win_name, dns_domain, dns_name, client_challenge = nil, chall_MsvAvTimestamp = nil, spnopt = {}) ⇒ Object
This function return an ntlmv2 client challenge This is a partial implementation, full description is in [MS-NLMP].pdf around 3.1.5.2.1 :-/
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# File 'lib/rex/proto/ntlm/utils.rb', line 429 def self.make_ntlmv2_clientchallenge(win_domain, win_name, dns_domain, dns_name, client_challenge = nil, chall_MsvAvTimestamp = nil, spnopt = {}) client_challenge ||= Rex::Text.rand_text(8) # We have to set the timestamps here to the one in the challenge message from server if present # If we don't do that, recent server like Seven/2008 will send a STATUS_INVALID_PARAMETER error packet = chall_MsvAvTimestamp != '' ? chall_MsvAvTimestamp : self.time_unix_to_smb(::Time.now.to_i).reverse.pack("VV") # Make those values unicode as requested win_domain = Rex::Text.to_unicode(win_domain) win_name = Rex::Text.to_unicode(win_name) dns_domain = Rex::Text.to_unicode(dns_domain) dns_name = Rex::Text.to_unicode(dns_name) # Make the AV_PAIRs addr_list = '' addr_list << [2, win_domain.length].pack('vv') + win_domain addr_list << [1, win_name.length].pack('vv') + win_name addr_list << [4, dns_domain.length].pack('vv') + dns_domain addr_list << [3, dns_name.length].pack('vv') + dns_name addr_list << [7, 8].pack('vv') + # Windows Seven / 2008r2 Request this type if in local security policies, # Microsoft network server : Server SPN target name validation level is set to <Required from client> # otherwise it send an STATUS_ACCESS_DENIED packet if spnopt[:use_spn] spn= Rex::Text.to_unicode("cifs/#{spnopt[:name] || 'unknown'}") addr_list << [9, spn.length].pack('vv') + spn end # MAY BE USEFUL FOR FUTURE # Seven (client) add at least one more av that is of type MsAvRestrictions (8) # maybe this will be useful with future windows OSs but has no use at all for the moment afaik # restriction_encoding = [48,0,0,0].pack("VVV") + # Size, Z4, IntegrityLevel, SubjectIntegrityLevel # Rex::Text.rand_text(32) # MachineId generated on startup on win7 and above # addr_list << [8, restriction_encoding.length].pack('vv') + restriction_encoding # Seven (client) and maybe others versions also add an av of type MsvChannelBindings (10) but the hash is "\x00" * 16 # addr_list << [10, 16].pack('vv') + "\x00" * 16 addr_list << [0, 0].pack('vv') ntlm_clientchallenge = [1,1,0,0].pack("CCvV") + #RespType, HiRespType, Reserved1, Reserved2 + #Timestamp client_challenge + #clientchallenge [0].pack("V") + #Reserved3 addr_list + "\x00" * 4 end |
.make_ntlmv2_secblob_success ⇒ Object
GSS BLOB Useful for SMB Success
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# File 'lib/rex/proto/ntlm/utils.rb', line 313 def self.make_ntlmv2_secblob_success blob = "\xa1" + self.asn1encode( "\x30" + self.asn1encode( "\xa0" + self.asn1encode( "\x0a" + self.asn1encode( "\x00" ) ) ) ) return blob end |
.make_simple_negotiate_secblob_resp ⇒ Object
GSS BLOB useful for SMB_NEGOCIATE_RESPONSE message mechTypes: 2 items : -MechType: 1.3.6.1.4.1.311.2.2.30 (SNMPv2-SMI::enterprises.311.2.2.30) -MechType: 1.3.6.1.4.1.311.2.2.10 (NTLMSSP - Microsoft NTLM Security Support Provider)
this is the default on Win7
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# File 'lib/rex/proto/ntlm/utils.rb', line 54 def self.make_simple_negotiate_secblob_resp blob = "\x60" + self.asn1encode( "\x06" + self.asn1encode( "\x2b\x06\x01\x05\x05\x02" ) + "\xa0" + self.asn1encode( "\x30" + self.asn1encode( "\xa0" + self.asn1encode( "\x30" + self.asn1encode( "\x06" + self.asn1encode( "\x2b\x06\x01\x04\x01\x82\x37\x02\x02\x0a" ) ) ) ) ) ) return blob end |
.parse_ntlm_type_2_blob(blob) ⇒ Object
Parse an ntlm type 2 challenge blob and return useful data
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# File 'lib/rex/proto/ntlm/utils.rb', line 367 def self.parse_ntlm_type_2_blob(blob) data = {} # Extract the NTLM challenge key the lazy way cidx = blob.index("NTLMSSP\x00\x02\x00\x00\x00") if not cidx raise Rex::Proto::NTLM::Exceptions::NTLMMissingChallenge end data[:challenge_key] = blob[cidx + 24, 8] data[:server_ntlmssp_flags] = blob[cidx + 20, 4].unpack("V")[0] # Extract the address list from the blob alist_len,alist_mlen,alist_off = blob[cidx + 40, 8].unpack("vvV") alist_buf = blob[cidx + alist_off, alist_len] while(alist_buf.length > 0) atype, alen = alist_buf.slice!(0,4).unpack('vv') break if atype == 0x00 addr = alist_buf.slice!(0, alen) case atype when 1 #netbios name temp_name = addr temp_name.force_encoding("UTF-16LE") data[:default_name] = temp_name.encode("UTF-8") when 2 #netbios domain temp_domain = addr temp_domain.force_encoding("UTF-16LE") data[:default_domain] = temp_domain.encode("UTF-8") when 3 #dns name temp_dns = addr temp_dns.force_encoding("UTF-16LE") data[:dns_host_name] = temp_dns.encode("UTF-8") when 4 #dns domain temp_dns_domain = addr temp_dns_domain.force_encoding("UTF-16LE") data[:dns_domain_name] = temp_dns_domain.encode("UTF-8") when 5 #The FQDN of the forest. when 6 #A 32-bit value indicating server or client configuration when 7 #Client time data[:chall_MsvAvTimestamp] = addr when 8 #A Restriction_Encoding structure when 9 #The SPN of the target server. when 10 #A channel bindings hash. end end return data end |
.time_unix_to_smb(unix_time) ⇒ Object
duplicate from lib/rex/proto/smb/utils cause we only need this function from Rex::Proto::SMB::Utils Convert a unix timestamp to a 64-bit signed server time
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# File 'lib/rex/proto/ntlm/utils.rb', line 8 def self.time_unix_to_smb(unix_time) t64 = (unix_time + 11644473600) * 10000000 thi = (t64 & 0xffffffff00000000) >> 32 tlo = (t64 & 0x00000000ffffffff) return [thi, tlo] end |