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DNP3pot.py
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DNP3pot.py
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#! /usr/bin/env python3
# DNP3pot - The Industrial Honeypot
#
#Creative Commons 2019 <wachowsky.artur@gmail.com>
#
# 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 2
# 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, write to the Free Software
# Foundation, Inc.,
# 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
"""
DNP3 Lib based on DNP3Lib.py and ported to Python3 by referefref [https://github.com/nrodofile/ScapyDNP3_lib]
Original author: Nicholas Rodofile
Updated by: James Brine
"""
import signal
import sys
import time
import collections
import select
import socket
import os
import chardet
import threading
import multiprocessing
from scapy.all import *
import DNP3_Lib
import logging
def listen(Ip, DNP3port):
p.start()
while 1:
try:
s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
s.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 3)
s.bind((Ip, DNP3port))
s.listen(5)
except socket.error:
exit(1)
conn, addr = s.accept()
logger.info('New connection from {}'.format(addr))
print('Received connection from {}'.format(addr))
try:
threading.Thread(target=new, args=(conn, addr)).start()
except:
print('Terrible Error!')
import traceback
traceback.print_exc()
print("cannot bind port :(")
exit(1)
def scapy(Ip, DNP3port):
sniff(filter="host " + Ip + " and tcp port " + str(DNP3port) + " and greater 50", prn=packet_callback, store=0)
# Packet Inspection
def new(conn, addr):
msg = conn.recv(2048)
try:
conn.send(banner)
time.sleep(1.02)
conn.close()
except TypeError:
conn.close()
if not len(str(msg)) == 0:
encoding = chardet.detect(msg)['encoding']
logger.info('Raw data received from {} rawdata: {} encoding: {}'.format(addr, msg, encoding))
# TODO FullPacket
else:
conn.close()
return
# DNP3 SCAPY FILTER
def packet_callback(pkt):
if pkt.haslayer(IP) and pkt[IP].dport == DNP3port and pkt[IP].dst == Ip and pkt.haslayer(DNP3):
if pkt[TCP].payload:
p = str(pkt.summary())
else:
p = 'No payload'
logger.info('DNP3 application layer detected - No Payload src {} dport {} dst {} sval {} chcval {}'.format(pkt[IP].src, pkt[IP].dport, pkt[IP].dst, pkt.START, pkt.LENGTH))
if not p == 'No payload':
logger.info('DNP3 application layer detected - Payload: {} src {} dport {} dst {} sval {} chcval {}'.format(p, pkt[IP].src, pkt[IP].dport, pkt[IP].dst, pkt.START, pkt.LENGTH))
# Pseudo Transport Layer Check
if pkt.haslayer(DNP3_Lib.DNP3Transport):
logger.info('DNP3 transport layer detected src {} dport {} dst {} FIN BIT {} FIR BIT {}'.format(pkt[IP].src, pkt[IP].dport, pkt[IP].dst, pkt.FIN, pkt.FIR))
# Function codes check
if pkt.haslayer(DNP3_Lib.DNP3ApplicationRequest):
if pkt.FUNC_CODE is not None:
if 0 <= pkt.FUNC_CODE <= 33:
logger.critical('\n DNP3 Function code {} detected {} ----{}----> {}:\n'.format(pkt.FUNC_CODE, pkt[IP].src, pkt[IP].dport, pkt[IP].dst))
send(response)
if 33 < pkt.FUNC_CODE < 129:
logger.critical('\n DNP3 OUT OF RANGE Function code {} detected {} ----{}----> {}:\n'.format(pkt.FUNC_CODE, pkt[IP].src, pkt[IP].dport, pkt[IP].dst))
if 129 <= pkt.FUNC_CODE <= 131:
logger.critical('\n DNP3 Function code {} detected {} ----{}----> {}:\n'.format(pkt.FUNC_CODE, pkt[IP].src, pkt[IP].dport, pkt[IP].dst))
send(response)
if not 0 <= pkt.FUNC_CODE <= 131:
logger.critical('\n DNP3 OUT OF RANGE Function code {} detected {} ----{}----> {}:\n'.format(pkt.FUNC_CODE, pkt[IP].src, pkt[IP].dport, pkt[IP].dst))
def get_eth0_ip():
try:
s = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
s.connect(("8.8.8.8", 80))
ip_address = s.getsockname()[0]
s.close()
return ip_address
except socket.error:
return None
if __name__ == "__main__":
print('Initialized')
s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
logger = logging.getLogger(__name__)
logging.getLogger("scapy.runtime").setLevel(logging.ERROR)
logger.setLevel(logging.INFO)
handler = logging.FileHandler('/var/log/dnp3pot.log')
handler.setLevel(logging.INFO)
formatter = logging.Formatter('%(asctime)s - %(name)s - %(levelname)s - %(message)s\n')
handler.setFormatter(formatter)
logger.addHandler(handler)
DNP3 = DNP3_Lib.DNP3
DNP3port = 20000
# Remove original ip command exec and replace with python sockets implementation instead for better portability
Ip = get_eth0_ip()
if Ip:
print("Eth0 IP address:", Ip)
else:
print("Failed to retrieve eth0 IP address. Exiting.")
sys.exit(1)
bind_layers(TCP, DNP3, dport=DNP3port)
bind_layers(TCP, DNP3, sport=DNP3port)
response = IP() / TCP() / '\x05\x64\x0A\x00\x01\x00\x05\x00\x39\x71\xC0\xF4\x82\x00\x00\x6F\xBA'
banner = '\x05\x64\x0A\x00\x01\x00\x05\x00\x39\x71\xC0\xF4\x82\x00\x00\x6F\xBA'
p = multiprocessing.Process(target=scapy, args=(Ip, DNP3port))
try:
listen(Ip, DNP3port)
except KeyboardInterrupt:
print('\nInterrupted')
s.close()
p.join()
sys.exit(0)