Module: Msf::Exploit::Remote::SMB::Client
- Includes:
- NTLM::Client, Tcp
- Included in:
- Authenticated, PipeAuditor
- Defined in:
- lib/msf/core/exploit/remote/smb/client.rb
Overview
This mixin provides utility methods for interacting with a SMB/CIFS service on a remote machine. These methods may generally be useful in the context of exploitation. This mixin extends the Tcp exploit mixin. Only one SMB service can be accessed at a time using this class.
Defined Under Namespace
Modules: Authenticated, Ipc, KerberosAuthentication, LocalPaths, PipeAuditor, Psexec, Psexec_MS17_010, RemotePaths, WebExec
Constant Summary collapse
- SIMPLE =
These constants are unused here, but may be used in some code that includes this. Local definitions should be preferred.
Rex::Proto::SMB::SimpleClient
- XCEPT =
Rex::Proto::SMB::Exceptions
- CONST =
Rex::Proto::SMB::Constants
- DCERPCPacket =
Alias over the Rex DCERPC protocol modules
Rex::Proto::DCERPC::Packet
- DCERPCClient =
Rex::Proto::DCERPC::Client
- DCERPCResponse =
Rex::Proto::DCERPC::Response
- DCERPCUUID =
Rex::Proto::DCERPC::UUID
- NDR =
Rex::Encoder::NDR
Instance Attribute Summary collapse
Attributes included from Tcp
Instance Method Summary collapse
-
#connect(global = true, versions: [], backend: nil, direct: nil) ⇒ Object
Override Tcp#connect to setup an SMB connection and configure evasion options.
- #domain ⇒ Object
-
#domain_username_split(user) ⇒ Object
If the username contains a / slash, then split it as a domain/username.
- #initialize(info = {}) ⇒ Object
-
#smb_create(pipe) ⇒ Object
This method opens a handle to an IPC pipe.
- #smb_direct ⇒ Object
-
#smb_enumprinters(flags, name, level, blen) ⇒ Object
Calls the EnumPrinters() function of the spooler service.
-
#smb_enumprintproviders ⇒ Object
This method dumps the print provider strings from the spooler.
-
#smb_file_exist?(file) ⇒ Boolean
Whether a remote file exists.
-
#smb_file_rm(file) ⇒ void
Remove remote file.
-
#smb_fingerprint ⇒ Object
This method performs an extensive set of fingerprinting operations.
-
#smb_fingerprint_windows_lang ⇒ Object
Determine the native language pack of a Windows system via SMB probes.
-
#smb_fingerprint_windows_sp(os) ⇒ Object
Determine the service pack level of a Windows system via SMB probes.
- #smb_hostname ⇒ Object
-
#smb_lanman_netshareenumall ⇒ Object
Retrieve a list of shares via the NetShareEnumAll function in the LANMAN service This method can only return shares with names 12 bytes or less.
-
#smb_login(simple_client = self.simple, opts: {}) ⇒ void
Establishes an SMB session over the default socket and connects to the IPC$ share.
-
#smb_lookup_share_type(val) ⇒ Object
Map an integer share type to a human friendly descriptor.
-
#smb_netshareenumall ⇒ Object
Retrieve a list of all shares using any available method.
-
#smb_netsharegetinfo(share) ⇒ Object
Retrieve detailed information about a specific share using any available method.
-
#smb_open(path, perm, read: true, write: false) ⇒ Object
the default chunk size of 48000 for OpenFile is not compatible when signing is enabled (and with some nt4 implementations) cause it looks like MS windows refuse to sign big packet and send STATUS_ACCESS_DENIED fd.chunk_size = 500 is better.
-
#smb_peer_lm ⇒ Object
This method returns the native lanman version of the peer.
-
#smb_peer_os ⇒ Object
This method returns the native operating system of the peer.
-
#smb_srvsvc_netshareenumall ⇒ Object
Retrieve a list of shares via the NetShareEnumAll function in the Server Service.
-
#smb_srvsvc_netsharegetinfo(share) ⇒ Object
Retrieve detailed share dinformation via the NetShareGetInfo function in the Server Service.
- #smbhost ⇒ Object
- #splitname(uname) ⇒ Object
-
#unicode(str) ⇒ Object
Convert a standard ASCII string to 16-bit Unicode.
Methods included from Tcp
#chost, #cleanup, #connect_timeout, #cport, #disconnect, #handler, #lhost, #lport, #peer, #print_prefix, #proxies, #rhost, #rport, #set_tcp_evasions, #shutdown, #ssl, #ssl_cipher, #ssl_verify_mode, #ssl_version
Instance Attribute Details
#simple ⇒ Rex::Proto::SMB::SimpleClient
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# File 'lib/msf/core/exploit/remote/smb/client.rb', line 907 def simple @simple end |
Instance Method Details
#connect(global = true, versions: [], backend: nil, direct: nil) ⇒ Object
Override Tcp#connect to setup an SMB connection and configure evasion options
Also populates #simple.
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# File 'lib/msf/core/exploit/remote/smb/client.rb', line 97 def connect(global=true, versions: [], backend: nil, direct: nil) if versions.nil? || versions.empty? versions = datastore['SMB::ProtocolVersion'].split(',').map(&:strip).reject(&:blank?).map(&:to_i) # if the user explicitly set the protocol version to 1, still use ruby_smb backend ||= :ruby_smb if versions == [1] end disconnect() if global s = super(global, {'SSL' => false}) self.sock = s if global # Disable direct SMB when SMBDirect has not been set # and the destination port is configured as 139 if direct.nil? direct = smb_direct if datastore.default?('SMBDirect') and rport.to_i == 139 direct = false end end c = Rex::Proto::SMB::SimpleClient.new(s, direct, versions, always_encrypt: datastore['SMB::AlwaysEncrypt'], backend: backend) # setup pipe evasion foo if datastore['SMB::pipe_evasion'] # XXX - insert code to change the instance of the read/write functions to do segmentation end if (datastore['SMB::pad_data_level']) c.client.evasion_opts['pad_data'] = datastore['SMB::pad_data_level'] end if (datastore['SMB::pad_file_level']) c.client.evasion_opts['pad_file'] = datastore['SMB::pad_file_level'] end if (datastore['SMB::obscure_trans_pipe_level']) c.client.evasion_opts['obscure_trans_pipe'] = datastore['SMB::obscure_trans_pipe_level'] end self.simple = c if global c end |
#domain ⇒ Object
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# File 'lib/msf/core/exploit/remote/smb/client.rb', line 243 def domain datastore['SMBDomain'] end |
#domain_username_split(user) ⇒ Object
If the username contains a / slash, then split it as a domain/username. NOTE: this is predicated on forward slashes, and not Microsoft’s backwards slash convention.
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# File 'lib/msf/core/exploit/remote/smb/client.rb', line 259 def domain_username_split(user) return user if(user.nil? || user.empty?) if !user[/\//] # Only /, not \! return [nil,user] else return user.split("/",2) end end |
#initialize(info = {}) ⇒ Object
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# File 'lib/msf/core/exploit/remote/smb/client.rb', line 29 def initialize(info = {}) super ( [ OptBool.new('SMB::pipe_evasion', [ true, 'Enable segmented read/writes for SMB Pipes', false]), OptInt.new('SMB::pipe_write_min_size', [ true, 'Minimum buffer size for pipe writes', 1]), OptInt.new('SMB::pipe_write_max_size', [ true, 'Maximum buffer size for pipe writes', 1024]), OptInt.new('SMB::pipe_read_min_size', [ true, 'Minimum buffer size for pipe reads', 1]), OptInt.new('SMB::pipe_read_max_size', [ true, 'Maximum buffer size for pipe reads', 1024]), OptInt.new('SMB::pad_data_level', [ true, 'Place extra padding between headers and data (level 0-3)', 0]), OptInt.new('SMB::pad_file_level', [ true, 'Obscure path names used in open/create (level 0-3)', 0]), OptInt.new('SMB::obscure_trans_pipe_level', [ true, 'Obscure PIPE string in TransNamedPipe (level 0-3)', 0]), ], Msf::Exploit::Remote::SMB::Client) ( [ OptBool.new('SMBDirect', [ false, 'The target port is a raw SMB service (not NetBIOS)', true ]), OptString.new('SMBUser', [ false, 'The username to authenticate as', ''], fallbacks: ['USERNAME']), OptString.new('SMBPass', [ false, 'The password for the specified username', ''], fallbacks: ['PASSWORD']), OptString.new('SMBDomain', [ false, 'The Windows domain to use for authentication', '.'], fallbacks: ['DOMAIN']), OptString.new('SMBName', [ true, 'The NetBIOS hostname (required for port 139 connections)', '*SMBSERVER']), OptBool.new('SMB::VerifySignature', [ true, "Enforces client-side verification of server response signatures", false]), OptInt.new('SMB::ChunkSize', [ true, 'The chunk size for SMB segments, bigger values will increase speed but break NT 4.0 and SMB signing', 500]), # # Control the identified operating system of the client # OptString.new('SMB::Native_OS', [ true, 'The Native OS to send during authentication', 'Windows 2000 2195']), OptString.new('SMB::Native_LM', [ true, 'The Native LM to send during authentication', 'Windows 2000 5.0']), OptString.new( 'SMB::ProtocolVersion', [ true, 'One or a list of coma-separated SMB protocol versions to '\ 'negotiate (e.g. "1" or "1,2" or "2,3,1")', '1,2,3' ], regex: '^[123](?:,[123])*$' ), OptBool.new( 'SMB::AlwaysEncrypt', [ true, 'Enforces encryption even if the server does not require it (SMB3.x only). '\ 'Note that when it is set to false, the SMB client will still '\ 'encrypt the communication if the server requires it', true ] ) ], Msf::Exploit::Remote::SMB::Client) ( [ Opt::RHOST, OptPort.new('RPORT', [ true, 'The SMB service port', 445]) ], Msf::Exploit::Remote::SMB::Client) register_autofilter_ports([ 139, 445]) register_autofilter_services(%W{ netbios-ssn microsoft-ds }) end |
#smb_create(pipe) ⇒ Object
This method opens a handle to an IPC pipe
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# File 'lib/msf/core/exploit/remote/smb/client.rb', line 224 def smb_create(pipe) self.simple.create_pipe(pipe) end |
#smb_direct ⇒ Object
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# File 'lib/msf/core/exploit/remote/smb/client.rb', line 239 def smb_direct datastore['SMBDirect'] end |
#smb_enumprinters(flags, name, level, blen) ⇒ Object
Calls the EnumPrinters() function of the spooler service
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# File 'lib/msf/core/exploit/remote/smb/client.rb', line 328 def smb_enumprinters(flags, name, level, blen) stub = NDR.long(flags) + (name ? NDR.uwstring(name) : NDR.long(0)) + NDR.long(level) + NDR.long(rand(0xffffffff)+1)+ NDR.long(blen) + "\x00" * blen + NDR.long(blen) handle = dcerpc_handle( '12345678-1234-abcd-ef00-0123456789ab', '1.0', 'ncacn_np', ["\\SPOOLSS"] ) begin dcerpc_bind(handle) dcerpc.call(0x00, stub) return dcerpc.last_response.stub_data rescue ::Interrupt raise $! rescue ::Exception => e return nil end end |
#smb_enumprintproviders ⇒ Object
This method dumps the print provider strings from the spooler
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# File 'lib/msf/core/exploit/remote/smb/client.rb', line 355 def smb_enumprintproviders resp = smb_enumprinters(8, nil, 1, 0) return nil if not resp rptr, tmp, blen = resp.unpack("V*") resp = smb_enumprinters(8, nil, 1, blen) return nil if not resp bcnt,pcnt,stat = resp[-12, 12].unpack("VVV") return nil if stat != 0 return nil if pcnt == 0 return nil if bcnt > blen return nil if pcnt < 3 # # The correct way, which leads to invalid offsets :-( # #providers = [] # #0.upto(pcnt-1) do |i| # flags,desc_o,name_o,comm_o = resp[8 + (i*16), 16].unpack("VVVV") # # #desc = read_unicode(resp,8+desc_o).gsub("\x00", '') # #name = read_unicode(resp,8+name_o).gsub("\x00", '') # #comm = read_unicode(resp,8+comm_o).gsub("\x00", '') # #providers << [flags,desc,name,comm] #end # #providers return resp end |
#smb_file_exist?(file) ⇒ Boolean
Whether a remote file exists
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# File 'lib/msf/core/exploit/remote/smb/client.rb', line 282 def smb_file_exist?(file) begin fd = simple.open(file, 'o') rescue RubySMB::Error::UnexpectedStatusCode => e found = false rescue Rex::Proto::SMB::Exceptions::ErrorCode => e # If attempting to open the file results in a "*_NOT_FOUND" error, # then we can be sure the file is not there. # # Copy-pasted from smb/exceptions.rb to avoid the gymnastics # required to pull them out of a giant inverted hash # # 0xC0000034 => "STATUS_OBJECT_NAME_NOT_FOUND", # 0xC000003A => "STATUS_OBJECT_PATH_NOT_FOUND", # 0xC0000225 => "STATUS_NOT_FOUND", error_is_not_found = [ 0xC0000034, 0xC000003A, 0xC0000225 ].include?(e.error_code) # If the server returns some other error, then there was a # permissions problem or some other difficulty that we can't # really account for and hope the caller can deal with it. raise e unless error_is_not_found found = !error_is_not_found else # There was no exception, so we know the file is openable fd.close found = true end found end |
#smb_file_rm(file) ⇒ void
This method returns an undefined value.
Remove remote file
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# File 'lib/msf/core/exploit/remote/smb/client.rb', line 316 def smb_file_rm(file) fd = smb_open(file, 'ro') fd.delete end |
#smb_fingerprint ⇒ Object
This method performs an extensive set of fingerprinting operations
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# File 'lib/msf/core/exploit/remote/smb/client.rb', line 390 def smb_fingerprint fprint = {} # Connect to the server if needed if not self.simple # native_lm/native_os is only available with SMB1 vprint_status('Force SMB1 since SMB fingerprint needs native_lm/native_os information') connect(versions: [1]) # The login method can throw any number of exceptions, we don't # care since we still get the native_lm/native_os. begin smb_login() rescue ::Rex::Proto::SMB::Exceptions::NoReply, ::Rex::Proto::SMB::Exceptions::ErrorCode, ::Rex::Proto::SMB::Exceptions::LoginError => e dlog("Error with SMB fingerprint: #{e.}") end end fprint['native_os'] = smb_peer_os() fprint['native_lm'] = smb_peer_lm() # Leverage Recog for SMB native OS fingerprinting fp_match = Recog::Nizer.match('smb.native_os', fprint['native_os']) || { } os = fp_match['os.product'] || 'Unknown' sp = fp_match['os.version'] || '' # Metasploit prefers 'Windows 2003' vs 'Windows Server 2003' if os =~ /^Windows Server/ os = os.sub(/^Windows Server/, 'Windows') end if fp_match['os.edition'] fprint['edition'] = fp_match['os.edition'] end if fp_match['os.build'] fprint['build'] = fp_match['os.build'] end if sp == '' sp = smb_fingerprint_windows_sp(os) end lang = smb_fingerprint_windows_lang fprint['os'] = os fprint['sp'] = sp fprint['lang'] = lang fprint end |
#smb_fingerprint_windows_lang ⇒ Object
Determine the native language pack of a Windows system via SMB probes
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# File 'lib/msf/core/exploit/remote/smb/client.rb', line 552 def smb_fingerprint_windows_lang # # Remote language detection via Print Providers # Credit: http://immunityinc.com/downloads/Remote_Language_Detection_in_Immunity_CANVAS.odt # lang = 'Unknown' sigs = { 'English' => [ Rex::Text.to_unicode('Windows NT Remote Printers'), Rex::Text.to_unicode('LanMan Print Services') ], 'Spanish' => [ Rex::Text.to_unicode('Impresoras remotas Windows NT'), Rex::Text.to_unicode('Impresoras remotas de Windows NT') ], 'Italian' => [ Rex::Text.to_unicode('Stampanti remote di Windows NT'), Rex::Text.to_unicode('Servizi di stampa LanMan') ], 'French' => [ Rex::Text.to_unicode('Imprimantes distantes NT'), Rex::Text.to_unicode('Imprimantes distantes pour Windows NT'), Rex::Text.to_unicode("Services d'impression LanMan") ], 'German' => [ Rex::Text.to_unicode('Remotedrucker') ], 'Portuguese - Brazilian' => [ Rex::Text.to_unicode('Impr. remotas Windows NT'), Rex::Text.to_unicode('Impressoras remotas do Windows NT') ], 'Portuguese' => [ Rex::Text.to_unicode('Imp. remotas do Windows NT') ], 'Hungarian' => [ Rex::Text.to_unicode("\x54\xe1\x76\x6f\x6c\x69\x20\x6e\x79\x6f\x6d\x74\x61\x74\xf3\x6b") ], 'Finnish' => [ Rex::Text.to_unicode("\x45\x74\xe4\x74\x75\x6c\x6f\x73\x74\x69\x6d\x65\x74") ], 'Dutch' => [ Rex::Text.to_unicode('Externe printers voor NT') ], 'Danish' => [ Rex::Text.to_unicode('Fjernprintere') ], 'Swedish' => [ Rex::Text.to_unicode("\x46\x6a\xe4\x72\x72\x73\x6b\x72\x69\x76\x61\x72\x65") ], 'Polish' => [ Rex::Text.to_unicode('Zdalne drukarki') ], 'Czech' => [ Rex::Text.to_unicode("\x56\x7a\x64\xe1\x6c\x65\x6e\xe9\x20\x74\x69\x73\x6b\xe1\x72\x6e\x79") ], 'Turkish' => [ "\x59\x00\x61\x00\x7a\x00\x31\x01\x63\x00\x31\x01\x6c\x00\x61\x00\x72\x00" ], 'Japanese' => [ "\xea\x30\xe2\x30\xfc\x30\xc8\x30\x20\x00\xd7\x30\xea\x30\xf3\x30\xbf\x30" ], 'Chinese - Traditional' => [ "\xdc\x8f\x0b\x7a\x53\x62\x70\x53\x3a\x67" ], 'Chinese - Traditional / Taiwan' => [ "\x60\x90\xef\x7a\x70\x53\x68\x88\x5f\x6a", ], 'Korean' => [ "\xd0\xc6\xa9\xac\x20\x00\x04\xd5\xb0\xb9\x30\xd1", ], 'Russian' => [ "\x1f\x04\x40\x04\x38\x04\x3d\x04\x42\x04\x35\x04\x40\x04\x4b\x04\x20\x00\x43\x04\x34\x04\x30\x04\x3b\x04\x35\x04\x3d\x04\x3d\x04\x3e\x04\x33\x04\x3e\x04\x20\x00\x34\x04\x3e\x04\x41\x04\x42\x04\x43\x04\x3f\x04\x30\x04", ], } begin prov = smb_enumprintproviders() if(prov) sigs.each_key do |k| sigs[k].each do |s| if(prov.index(s)) lang = k break end break if lang != 'Unknown' end break if lang != 'Unknown' end if(lang == 'Unknown') @fpcache ||= {} mhash = ::Digest::MD5.hexdigest(prov[4,prov.length-4]) if(not @fpcache[mhash]) buff = "\n" buff << "*** NEW FINGERPRINT: PLEASE SEND TO [ msfdev[at]metasploit.com ]\n" buff << " VERS: $Revision$\n" buff << " HOST: #{rhost}\n" buff << " OS: #{os}\n" buff << " SP: #{sp}\n" prov.unpack("H*")[0].scan(/.{64}|.*/).each do |line| next if line.length == 0 buff << " FP: #{line}\n" end prov.split(/\x00\x00+/n).each do |line| line.gsub!("\x00",'') line.strip! next if line.length < 6 buff << " TXT: #{line}\n" end buff << "*** END FINGERPRINT\n" print_line(buff) @fpcache[mhash] = true end end end rescue ::Interrupt raise $! rescue ::Rex::Proto::SMB::Exceptions::ErrorCode end lang end |
#smb_fingerprint_windows_sp(os) ⇒ Object
Determine the service pack level of a Windows system via SMB probes
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# File 'lib/msf/core/exploit/remote/smb/client.rb', line 447 def smb_fingerprint_windows_sp(os) sp = '' if (os == 'Windows XP') # SRVSVC was blocked in SP2 begin smb_create("\\SRVSVC") sp = 'Service Pack 0 / 1' rescue ::Rex::Proto::SMB::Exceptions::ErrorCode => e if (e.error_code == 0xc0000022) sp = 'Service Pack 2+' end end end if (os == 'Windows 2000' and sp.length == 0) # LLSRPC was blocked in a post-SP4 update begin smb_create("\\LLSRPC") sp = 'Service Pack 0 - 4' rescue ::Rex::Proto::SMB::Exceptions::ErrorCode => e if (e.error_code == 0xc0000022) sp = 'Service Pack 4 with MS05-010+' end end end # # Perform granular XP SP checks if LSARPC is exposed # if (os == 'Windows XP') # # Service Pack 2 added a range(0,64000) to opnum 0x22 in SRVSVC # Credit to spoonm for first use of unbounded [out] buffers # handle = dcerpc_handle( '4b324fc8-1670-01d3-1278-5a47bf6ee188', '3.0', 'ncacn_np', ["\\BROWSER"] ) begin dcerpc_bind(handle) stub = NDR.uwstring(Rex::Text.rand_text_alpha(rand(10)+1)) + NDR.wstring(Rex::Text.rand_text_alpha(rand(10)+1)) + NDR.long(64001) + NDR.long(0) + NDR.long(0) dcerpc.call(0x22, stub) sp = "Service Pack 0 / 1" rescue ::Interrupt raise $! rescue ::Rex::Proto::SMB::Exceptions::ErrorCode rescue ::Rex::Proto::SMB::Exceptions::ReadPacket rescue ::Rex::Proto::DCERPC::Exceptions::Fault sp = "Service Pack 2+" rescue ::Exception end # # Service Pack 3 fixed information leaks via [unique][out] pointers # Call SRVSVC::NetRemoteTOD() to return [out] [ref] [unique] # Credit: # Pointer leak is well known, but Immunity also covered in a paper # Silent fix of pointer leak in SP3 and detection method by Rhys Kidd # handle = dcerpc_handle( '4b324fc8-1670-01d3-1278-5a47bf6ee188', '3.0', 'ncacn_np', ["\\BROWSER"] ) begin dcerpc_bind(handle) stub = NDR.uwstring(Rex::Text.rand_text_alpha(rand(8)+1)) resp = dcerpc.call(0x1c, stub) if(resp and resp[0,4] == "\x00\x00\x02\x00") sp = "Service Pack 3" else if(resp and sp =~ /Service Pack 2\+/) sp = "Service Pack 2" end end rescue ::Interrupt raise $! rescue ::Rex::Proto::SMB::Exceptions::ErrorCode rescue ::Rex::Proto::SMB::Exceptions::ReadPacket rescue ::Exception end end sp end |
#smb_hostname ⇒ Object
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# File 'lib/msf/core/exploit/remote/smb/client.rb', line 235 def smb_hostname datastore['SMBName'] || '*SMBSERVER' end |
#smb_lanman_netshareenumall ⇒ Object
Retrieve a list of shares via the NetShareEnumAll function in the LANMAN service This method can only return shares with names 12 bytes or less
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# File 'lib/msf/core/exploit/remote/smb/client.rb', line 863 def smb_lanman_netshareenumall shares = [] begin # XXX: #trans is not supported by RubySMB res = self.simple.client.trans( "\\PIPE\\LANMAN", ( [0x00].pack('v') + "WrLeh\x00" + "B13BWz\x00" + [0x01, 65406].pack("vv") )) rescue ::Rex::Proto::SMB::Exceptions::ErrorCode => e vprint_error("Could not enumerate shares via LANMAN") return [] end if res.nil? vprint_error("Could not enumerate shares via LANMAN") return [] end lerror, lconv, lentries, lcount = res['Payload'].to_s[ res['Payload'].v['ParamOffset'], res['Payload'].v['ParamCount'] ].unpack("v4") data = res['Payload'].to_s[ res['Payload'].v['DataOffset'], res['Payload'].v['DataCount'] ] 0.upto(lentries - 1) do |i| sname,tmp = data[(i * 20) + 0, 14].split("\x00") stype = data[(i * 20) + 14, 2].unpack('v')[0] scoff = data[(i * 20) + 16, 2].unpack('v')[0] scoff -= lconv if lconv != 0 scomm,tmp = data[scoff, data.length - scoff].split("\x00") shares << [ sname, smb_lookup_share_type(stype), scomm] end shares end |
#smb_login(simple_client = self.simple, opts: {}) ⇒ void
This method returns an undefined value.
Establishes an SMB session over the default socket and connects to the IPC$ share.
You should call #connect before calling this
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# File 'lib/msf/core/exploit/remote/smb/client.rb', line 158 def smb_login(simple_client = self.simple, opts: {}) username = opts.fetch(:username) {datastore['SMBUser']} domain = opts.fetch(:domain) {datastore['SMBDomain']} password = opts.fetch(:password) {datastore['SMBPass']} smb_auth = opts.fetch(:auth_protocol) {datastore['SMB::Auth']} # Override the default RubySMB capabilities with Kerberos authentication if smb_auth == Msf::Exploit::Remote::AuthOption::KERBEROS fail_with(Msf::Exploit::Failure::BadConfig, 'The Smb::Rhostname option is required when using Kerberos authentication.') if datastore['Smb::Rhostname'].blank? fail_with(Msf::Exploit::Failure::BadConfig, 'The SMBDomain option is required when using Kerberos authentication.') if datastore['SMBDomain'].blank? offered_etypes = Msf::Exploit::Remote::AuthOption.as_default_offered_etypes(datastore['Smb::KrbOfferedEncryptionTypes']) fail_with(Msf::Exploit::Failure::BadConfig, 'At least one encryption type is required when using Kerberos authentication.') if offered_etypes.empty? kerberos_authenticator = Msf::Exploit::Remote::Kerberos::ServiceAuthenticator::SMB.new( host: datastore['DomainControllerRhost'].blank? ? nil : datastore['DomainControllerRhost'], hostname: datastore['Smb::Rhostname'], proxies: datastore['Proxies'], realm: domain, username: username, password: password, framework: framework, framework_module: self, cache_file: datastore['Smb::Krb5Ccname'].blank? ? nil : datastore['Smb::Krb5Ccname'], ticket_storage: kerberos_ticket_storage, offered_etypes: offered_etypes ) simple_client.client.extend(Msf::Exploit::Remote::SMB::Client::KerberosAuthentication) simple_client.client.kerberos_authenticator = kerberos_authenticator end simple_client.login( datastore['SMBName'], username, password, domain, datastore['SMB::VerifySignature'], datastore['NTLM::UseNTLMv2'], datastore['NTLM::UseNTLM2_session'], datastore['NTLM::SendLM'], datastore['NTLM::UseLMKey'], datastore['NTLM::SendNTLM'], datastore['SMB::Native_OS'], datastore['SMB::Native_LM'], { :use_spn => datastore['NTLM::SendSPN'], :name => simple_client.peerhost } ) # XXX: Any reason to connect to the IPC$ share in this method? simple_client.client.tree_connect("\\\\#{simple_client.peerhost}\\IPC$") end |
#smb_lookup_share_type(val) ⇒ Object
Map an integer share type to a human friendly descriptor
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# File 'lib/msf/core/exploit/remote/smb/client.rb', line 710 def smb_lookup_share_type(val) [ 'DISK', 'PRINTER', 'DEVICE', 'IPC', 'SPECIAL', 'TEMPORARY' ][val] end |
#smb_netshareenumall ⇒ Object
Retrieve a list of all shares using any available method
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# File 'lib/msf/core/exploit/remote/smb/client.rb', line 770 def smb_netshareenumall begin return smb_srvsvc_netshareenumall rescue Rex::Proto::SMB::Exceptions::ErrorCode, RubySMB::Error::RubySMBError => e vprint_error("Warning: NetShareEnumAll failed via Server Service: #{e}") return [] if self.simple.client.is_a?(RubySMB::Client) vprint_error("Falling back to LANMAN") return smb_lanman_netshareenumall end end |
#smb_netsharegetinfo(share) ⇒ Object
Retrieve detailed information about a specific share using any available method
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# File 'lib/msf/core/exploit/remote/smb/client.rb', line 715 def smb_netsharegetinfo(share) smb_srvsvc_netsharegetinfo(share) end |
#smb_open(path, perm, read: true, write: false) ⇒ Object
the default chunk size of 48000 for OpenFile is not compatible when signing is enabled (and with some nt4 implementations) cause it looks like MS windows refuse to sign big packet and send STATUS_ACCESS_DENIED fd.chunk_size = 500 is better
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# File 'lib/msf/core/exploit/remote/smb/client.rb', line 231 def smb_open(path, perm, read: true, write: false) self.simple.open(path, perm, datastore['SMB::ChunkSize'], read: read, write: write) end |
#smb_peer_lm ⇒ Object
This method returns the native lanman version of the peer
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# File 'lib/msf/core/exploit/remote/smb/client.rb', line 216 def smb_peer_lm unless self.simple.negotiated_smb_version == 1 print_warning("peer_native_lm is only available with SMB1 (current version: SMB#{self.simple.negotiated_smb_version})") end self.simple.client.peer_native_lm end |
#smb_peer_os ⇒ Object
This method returns the native operating system of the peer
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# File 'lib/msf/core/exploit/remote/smb/client.rb', line 208 def smb_peer_os unless self.simple.negotiated_smb_version == 1 print_warning("peer_native_os is only available with SMB1 (current version: SMB#{self.simple.negotiated_smb_version})") end self.simple.client.peer_native_os end |
#smb_srvsvc_netshareenumall ⇒ Object
Retrieve a list of shares via the NetShareEnumAll function in the Server Service
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# File 'lib/msf/core/exploit/remote/smb/client.rb', line 782 def smb_srvsvc_netshareenumall shares = [] simple.connect("\\\\#{rhost}\\IPC$") handle = dcerpc_handle('4b324fc8-1670-01d3-1278-5a47bf6ee188', '3.0', 'ncacn_np', ["\\srvsvc"]) begin dcerpc_bind(handle) rescue Rex::Proto::SMB::Exceptions::ErrorCode, RubySMB::Error::RubySMBError => e vprint_error(e.) return [] end stubdata = NDR.uwstring("\\\\#{rhost}") + NDR.long(1) #level ref_id = stubdata[0,4].unpack("V")[0] ctr = [1, ref_id + 4 , 0, 0].pack("VVVV") stubdata << ctr stubdata << NDR.align(ctr) stubdata << ["FFFFFFFF"].pack("H*") stubdata << [ref_id + 8, 0].pack("VV") response = dcerpc.call(0x0f, stubdata) res = response.dup win_error = res.slice!(-4, 4).unpack("V")[0] if win_error != 0 raise RuntimeError, "Invalid DCERPC response: win_error = #{win_error}" end # Remove unused data res.slice!(0,12) # level, CTR header, Reference ID of CTR share_count = res.slice!(0, 4).unpack("V")[0] res.slice!(0,4) # Reference ID of CTR1 share_max_count = res.slice!(0, 4).unpack("V")[0] if share_max_count != share_count raise RuntimeError, "Invalid DCERPC response: count != count max (#{share_count}/#{share_max_count})" end # ReferenceID / Type / ReferenceID of Comment types = res.slice!(0, share_count * 12).scan(/.{12}/n).map{|a| a[4,2].unpack("v")[0]} share_count.times do |t| length, offset, max_length = res.slice!(0, 12).unpack("VVV") if offset != 0 raise RuntimeError, "Invalid DCERPC response: offset != 0 (#{offset})" end if length != max_length raise RuntimeError, "Invalid DCERPC response: length !=max_length (#{length}/#{max_length})" end name = res.slice!(0, 2 * length).gsub('\x00','') res.slice!(0,2) if length % 2 == 1 # pad comment_length, comment_offset, comment_max_length = res.slice!(0, 12).unpack("VVV") if comment_offset != 0 raise RuntimeError, "Invalid DCERPC response: comment_offset != 0 (#{comment_offset})" end if comment_length != comment_max_length raise RuntimeError, "Invalid DCERPC response: comment_length != comment_max_length (#{comment_length}/#{comment_max_length})" end comment = res.slice!(0, 2 * comment_length) res.slice!(0,2) if comment_length % 2 == 1 # pad name = Rex::Text.to_ascii(name).gsub("\x00", "") s_type = smb_lookup_share_type(types[t]) comment = Rex::Text.to_ascii(comment).gsub("\x00", "") shares << [ name, s_type, comment ] end shares end |
#smb_srvsvc_netsharegetinfo(share) ⇒ Object
Retrieve detailed share dinformation via the NetShareGetInfo function in the Server Service
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# File 'lib/msf/core/exploit/remote/smb/client.rb', line 720 def smb_srvsvc_netsharegetinfo(share) shares = [] simple.connect("\\\\#{rhost}\\IPC$") handle = dcerpc_handle('4b324fc8-1670-01d3-1278-5a47bf6ee188', '3.0', 'ncacn_np', ["\\srvsvc"]) begin dcerpc_bind(handle) rescue Rex::Proto::SMB::Exceptions::ErrorCode, RubySMB::Error::RubySMBError => e vprint_error(e.) return [] end stubdata = NDR.uwstring("\\\\#{rhost}") + NDR.wstring(share) + NDR.long(2) response = dcerpc.call(0x10, stubdata) if ! response raise RuntimeError, "Invalid DCERPC response: <empty>" end head = response.slice!(0, 40) if head.length != 40 raise RuntimeError, "Invalid DCERPC response: not enough data" end share_info = { share_type: head[12, 4].unpack('V').first, permissions: head[20, 4].unpack('V').first, max_users: head[24, 4].unpack('V').first, } idx = 0 [:share, :comment, :path, :password].each do |field| field_info = response[idx, 12].unpack("V*") break if field_info.length == 0 idx += 12 field_text = response[idx, field_info.first * 2] share_info[ field ] = field_text.gsub("\x00", '') idx += (field_info.first * 2) idx += (idx % 4) end share_info end |
#smbhost ⇒ Object
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# File 'lib/msf/core/exploit/remote/smb/client.rb', line 247 def smbhost if domain == "." "#{rhost}:#{rport}" else "#{rhost}:#{rport}|#{domain}" end end |
#splitname(uname) ⇒ Object
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# File 'lib/msf/core/exploit/remote/smb/client.rb', line 268 def splitname(uname) if datastore["PRESERVE_DOMAINS"] d,u = domain_username_split(uname) return u else return uname end end |
#unicode(str) ⇒ Object
Convert a standard ASCII string to 16-bit Unicode
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# File 'lib/msf/core/exploit/remote/smb/client.rb', line 142 def unicode(str) Rex::Text.to_unicode(str) end |