import logging
from random import shuffle, randint, choice, uniform
from lea import Lea
from Attack import BaseAttack
from Attack.AttackParameters import Parameter as Param
from Attack.AttackParameters import ParameterTypes
logging.getLogger("scapy.runtime").setLevel(logging.ERROR)
# noinspection PyPep8
from scapy.layers.inet import IP, Ether, TCP
from scapy.layers.smb import *
from scapy.layers.netbios import *
class SmbScanAttack(BaseAttack.BaseAttack):
# SMB port
smb_port = 445
def __init__(self):
"""
Creates a new instance of the SmbScanAttack.
"""
# Initialize attack
super(SmbScanAttack, self).__init__("SmbScan Attack", "Injects an SMB scan",
"Scanning/Probing")
# Define allowed parameters and their type
self.supported_params = {
Param.IP_SOURCE: ParameterTypes.TYPE_IP_ADDRESS,
Param.IP_DESTINATION: ParameterTypes.TYPE_IP_ADDRESS,
Param.PORT_SOURCE: ParameterTypes.TYPE_PORT,
Param.MAC_SOURCE: ParameterTypes.TYPE_MAC_ADDRESS,
Param.MAC_DESTINATION: ParameterTypes.TYPE_MAC_ADDRESS,
Param.INJECT_AT_TIMESTAMP: ParameterTypes.TYPE_FLOAT,
Param.INJECT_AFTER_PACKET: ParameterTypes.TYPE_PACKET_POSITION,
Param.IP_SOURCE_RANDOMIZE: ParameterTypes.TYPE_BOOLEAN,
Param.PACKETS_PER_SECOND: ParameterTypes.TYPE_FLOAT,
Param.PORT_SOURCE_RANDOMIZE: ParameterTypes.TYPE_BOOLEAN,
Param.IP_HOSTING: ParameterTypes.TYPE_IP_ADDRESS,
Param.PROTOCOL_VERSION: ParameterTypes.TYPE_STRING
}
def init_params(self):
"""
Initialize the parameters of this attack using the user supplied command line parameters.
Use the provided statistics to calculate default parameters and to process user
supplied queries.
:param statistics: Reference to a statistics object.
"""
# PARAMETERS: initialize with default values
# (values are overwritten if user specifies them)
most_used_ip_address = self.statistics.get_most_used_ip_address()
if isinstance(most_used_ip_address, list):
most_used_ip_address = most_used_ip_address[0]
self.add_param_value(Param.IP_SOURCE, most_used_ip_address)
self.add_param_value(Param.IP_SOURCE_RANDOMIZE, 'False')
self.add_param_value(Param.MAC_SOURCE, self.statistics.get_mac_address(most_used_ip_address))
all_ips = self.statistics.get_ip_addresses()
if not isinstance(all_ips, list):
ip_destinations = []
ip_destinations.append(all_ips)
else:
ip_destinations = all_ips
self.add_param_value(Param.IP_DESTINATION, ip_destinations)
# MAYBE REMOVE/CHANGE THIS MAC STUFF
#
destination_mac = []
for ip in ip_destinations:
destination_mac.append(self.statistics.get_mac_address(str(ip)))
if isinstance(destination_mac, list) and len(destination_mac) == 0:
destination_mac = self.generate_random_mac_address()
self.add_param_value(Param.MAC_DESTINATION, destination_mac)
#
#
self.add_param_value(Param.PORT_SOURCE, randint(1024, 65535))
self.add_param_value(Param.PORT_SOURCE_RANDOMIZE, 'False')
self.add_param_value(Param.PACKETS_PER_SECOND,
(self.statistics.get_pps_sent(most_used_ip_address) +
self.statistics.get_pps_received(most_used_ip_address)) / 2)
self.add_param_value(Param.INJECT_AFTER_PACKET, randint(0, self.statistics.get_packet_count()))
rnd_ip_count = self.statistics.get_ip_address_count()/2
self.add_param_value(Param.IP_HOSTING, self.statistics.get_random_ip_address(rnd_ip_count))
# maybe change to version 1 as default
self.add_param_value(Param.PROTOCOL_VERSION, "2.1")
@property
def generate_attack_pcap(self):
def update_timestamp(timestamp, pps, delay=0):
"""
Calculates the next timestamp to be used based on the packet per second rate (pps) and the maximum delay.
:return: Timestamp to be used for the next packet.
"""
if delay == 0:
# Calculate request timestamp
# To imitate the bursty behavior of traffic
randomdelay = Lea.fromValFreqsDict({1 / pps: 70, 2 / pps: 20, 5 / pps: 7, 10 / pps: 3})
return timestamp + uniform(1/pps , randomdelay.random())
else:
# Calculate reply timestamp
randomdelay = Lea.fromValFreqsDict({2*delay: 70, 3*delay: 20, 5*delay: 7, 10*delay: 3})
return timestamp + uniform(1 / pps + delay, 1 / pps + randomdelay.random())
def getIntervalPPS(complement_interval_pps, timestamp):
"""
Gets the packet rate (pps) for a specific time interval.
:param complement_interval_pps: an array of tuples (the last timestamp in the interval, the packet rate in the crresponding interval).
:param timestamp: the timestamp at which the packet rate is required.
:return: the corresponding packet rate (pps) .
"""
for row in complement_interval_pps:
if timestamp<=row[0]:
return row[1]
return complement_interval_pps[-1][1] # in case the timstamp > capture max timestamp
mac_source = self.get_param_value(Param.MAC_SOURCE)
mac_dest = self.get_param_value(Param.MAC_DESTINATION)
pps = self.get_param_value(Param.PACKETS_PER_SECOND)
# Calculate complement packet rates of the background traffic for each interval
complement_interval_pps = self.statistics.calculate_complement_packet_rates(pps)
if self.get_param_value(Param.PORT_SOURCE_RANDOMIZE):
sport = randint(1, 65535)
else:
sport = self.get_param_value(Param.PORT_SOURCE)
# Timestamp
timestamp_next_pkt = self.get_param_value(Param.INJECT_AT_TIMESTAMP)
# store start time of attack
self.attack_start_utime = timestamp_next_pkt
timestamp_prv_reply, timestamp_confirm = 0,0
# Initialize parameters
ip_source = self.get_param_value(Param.IP_SOURCE)
ip_destinations = self.get_param_value(Param.IP_DESTINATION)
ip_hosting = self.get_param_value(Param.IP_HOSTING)
packets = []
# Check ip.src == ip.dst
#self.ip_src_dst_equal_check(ip_source, ip_destination)
# Set MSS (Maximum Segment Size) based on MSS distribution of IP address
source_mss_dist = self.statistics.get_mss_distribution(ip_source)
if len(source_mss_dist) > 0:
source_mss_prob_dict = Lea.fromValFreqsDict(source_mss_dist)
source_mss_value = source_mss_prob_dict.random()
else:
source_mss_value = self.statistics.process_db_query("most_used(mssValue)")
# Set TTL based on TTL distribution of IP address
source_ttl_dist = self.statistics.get_ttl_distribution(ip_source)
if len(source_ttl_dist) > 0:
source_ttl_prob_dict = Lea.fromValFreqsDict(source_ttl_dist)
source_ttl_value = source_ttl_prob_dict.random()
else:
source_ttl_value = self.statistics.process_db_query("most_used(ttlValue)")
# Set Window Size based on Window Size distribution of IP address
source_win_dist = self.statistics.get_win_distribution(ip_source)
if len(source_win_dist) > 0:
source_win_prob_dict = Lea.fromValFreqsDict(source_win_dist)
source_win_value = source_win_prob_dict.random()
else:
source_win_value = self.statistics.process_db_query("most_used(winSize)")
# ACTUAL ATTACK GOES HERE
#print(len(mac_dest))
#print(mac_destination)
#print(len(ip_destinations))
#print(ip_destinations)
#print(ip_source)
ip_dests = []
if isinstance(ip_destinations, list):
ip_dests = ip_destinations
else:
ip_dests.append(ip_destinations)
#print(ip_dests)
for ip in ip_dests:
if ip != ip_source:
# Get destination Mac Address
#print(ip)
mac_destination = self.statistics.get_mac_address(str(ip))
if len(mac_destination) == 0:
if isinstance(mac_dest, str):
mac_destination = mac_dest
else:
mac_destination = self.generate_random_mac_address()
#print(len(mac_destination))
#print(mac_destination)
#print(ip)
# Set MSS (Maximum Segment Size) based on MSS distribution of IP address
destination_mss_dist = self.statistics.get_mss_distribution(ip)
if len(destination_mss_dist) > 0:
destination_mss_prob_dict = Lea.fromValFreqsDict(destination_mss_dist)
destination_mss_value = destination_mss_prob_dict.random()
else:
destination_mss_value = self.statistics.process_db_query("most_used(mssValue)")
# Set TTL based on TTL distribution of IP address
destination_ttl_dist = self.statistics.get_ttl_distribution(ip)
if len(destination_ttl_dist) > 0:
destination_ttl_prob_dict = Lea.fromValFreqsDict(destination_ttl_dist)
destination_ttl_value = destination_ttl_prob_dict.random()
else:
destination_ttl_value = self.statistics.process_db_query("most_used(ttlValue)")
# Set Window Size based on Window Size distribution of IP address
destination_win_dist = self.statistics.get_win_distribution(ip)
if len(destination_win_dist) > 0:
destination_win_prob_dict = Lea.fromValFreqsDict(destination_win_dist)
destination_win_value = destination_win_prob_dict.random()
else:
destination_win_value = self.statistics.process_db_query("most_used(winSize)")
minDelay, maxDelay = self.get_reply_delay(ip)
# New connection, new random TCP sequence numbers
attacker_seq = randint(1000, 50000)
victim_seq = randint(1000, 50000)
# 1) Build request package
request_ether = Ether(src=mac_source, dst=mac_destination)
request_ip = IP(src=ip_source, dst=ip, ttl=source_ttl_value, flags='DF')
request_tcp = TCP(sport=sport, dport=self.smb_port, window=source_win_value, flags='S',
seq=attacker_seq, options=[('MSS', source_mss_value)])
attacker_seq += 1
request = (request_ether / request_ip / request_tcp)
request.time = timestamp_next_pkt
# Append request
packets.append(request)
# Update timestamp for next package
timestamp_reply = update_timestamp(timestamp_next_pkt, pps, minDelay)
while (timestamp_reply <= timestamp_prv_reply):
timestamp_reply = update_timestamp(timestamp_prv_reply, pps, minDelay)
timestamp_prv_reply = timestamp_reply
if ip in ip_hosting:
# 2) Build TCP packages for ip that hosts SMB
# destination sends SYN, ACK
reply_ether = Ether(src=mac_destination, dst=mac_source)
reply_ip = IP(src=ip, dst=ip_source, ttl=destination_ttl_value, flags='DF')
reply_tcp = TCP(sport=self.smb_port, dport=sport, seq=victim_seq, ack=attacker_seq, flags='SA', window=destination_win_value,
options=[('MSS', destination_mss_value)])
victim_seq += 1
reply = (reply_ether / reply_ip / reply_tcp)
reply.time = timestamp_reply
packets.append(reply)
# requester confirms, ACK
confirm_ether = request_ether
confirm_ip = request_ip
confirm_tcp = TCP(sport=sport, dport=self.smb_port, seq=attacker_seq, ack=victim_seq, window=source_win_value, flags='A')
confirm = (confirm_ether / confirm_ip / confirm_tcp)
timestamp_confirm = update_timestamp(timestamp_reply, pps, minDelay)
confirm.time = timestamp_confirm
packets.append(confirm)
# INSERT SMB-REQUEST PACKAGE HERE
# CHECK FOR PROTOCOL VERSION?
smb_MID = randint(1, 65535)
smb_PID = randint(1, 65535)
smb_req_tail = SMBNegociate_Protocol_Request_Tail()
smb_req_head = SMBNegociate_Protocol_Request_Header(Flags2=0x2801, PID=smb_PID, MID=smb_MID)
smb_req_length = len(smb_req_head) + len(smb_req_tail)
smb_req_net_bio = NBTSession(TYPE=0x00, LENGTH=smb_req_length)
smb_req_tcp = TCP(sport=sport, dport=self.smb_port, flags='PA', seq=attacker_seq, ack=victim_seq)
smb_req_ip = IP(src=ip_source, dst=ip, ttl=source_ttl_value)
smb_req_ether = Ether(src=mac_source, dst=mac_destination)
attacker_seq += len(smb_req_net_bio) + len(smb_req_head) + len(smb_req_tail)
smb_req_combined = (
smb_req_ether / smb_req_ip / smb_req_tcp / smb_req_net_bio / smb_req_head / smb_req_tail)
timestamp_smb_req = update_timestamp(timestamp_confirm, pps, minDelay)
smb_req_combined.time = timestamp_smb_req
packets.append(smb_req_combined)
# destination confirms SMB request package
reply_tcp = TCP(sport=self.smb_port, dport=sport, seq=victim_seq, ack=attacker_seq, window=destination_win_value, flags='A')
confirm_smb_req = (reply_ether / reply_ip / reply_tcp)
timestamp_reply = update_timestamp(timestamp_smb_req, pps, minDelay)
confirm_smb_req.time = timestamp_reply
packets.append(confirm_smb_req)
# INSERT SMB-RESPONSE PACKAGE HERE
# CHECK FOR PROTOCOL VERSION?
smb_rsp_paket = SMBNegociate_Protocol_Response_No_Security_No_Key()
smb_rsp_length = len(smb_rsp_paket)
smb_rsp_net_bio = NBTSession(TYPE=0x00, LENGTH=smb_rsp_length)
smb_rsp_tcp = TCP(sport=self.smb_port, dport=sport, flags='PA', seq=victim_seq, ack=attacker_seq)
smb_rsp_ip = IP(src=ip, dst=ip_source, ttl=destination_ttl_value)
smb_rsp_ether = Ether(src=mac_destination, dst=mac_source)
victim_seq += len(smb_rsp_net_bio) + len(smb_rsp_paket)
smb_rsp_combined = (smb_rsp_ether / smb_rsp_ip / smb_rsp_tcp / smb_rsp_net_bio / smb_rsp_paket)
timestamp_smb_rsp = update_timestamp(timestamp_reply, pps, minDelay)
smb_rsp_combined.time = timestamp_smb_rsp
packets.append(smb_rsp_combined)
# source confirms SMB response package
confirm_tcp = TCP(sport=sport, dport=self.smb_port, seq=attacker_seq, ack=victim_seq, window=source_win_value, flags='A')
confirm_smb_res = (confirm_ether / confirm_ip / confirm_tcp)
timestamp_confirm = update_timestamp(timestamp_smb_rsp, pps, minDelay)
confirm_smb_res.time = timestamp_confirm
packets.append(confirm_smb_res)
# attacker sends FIN ACK
confirm_tcp = TCP(sport=sport, dport=self.smb_port, seq=attacker_seq, ack=victim_seq, window=source_win_value, flags='FA')
source_fin_ack = (confirm_ether / confirm_ip / confirm_tcp)
timestamp_src_fin_ack = update_timestamp(timestamp_confirm, pps, minDelay)
source_fin_ack.time = timestamp_src_fin_ack
attacker_seq += 1
packets.append(source_fin_ack)
# victim sends FIN ACK
reply_tcp = TCP(sport=self.smb_port, dport=sport, seq=victim_seq, ack=attacker_seq, window=destination_win_value, flags='FA')
destination_fin_ack = (reply_ether / reply_ip / reply_tcp)
timestamp_dest_fin_ack = update_timestamp(timestamp_src_fin_ack, pps, minDelay)
victim_seq += 1
destination_fin_ack.time = timestamp_dest_fin_ack
packets.append(destination_fin_ack)
# source sends final ACK
confirm_tcp = TCP(sport=sport, dport=self.smb_port, seq=attacker_seq, ack=victim_seq, window=source_win_value, flags='A')
final_ack = (confirm_ether / confirm_ip / confirm_tcp)
timestamp_final_ack = update_timestamp(timestamp_dest_fin_ack, pps, minDelay)
final_ack.time = timestamp_final_ack
packets.append(final_ack)
else:
# Build RST package
reply_ether = Ether(src=mac_destination, dst=mac_source)
reply_ip = IP(src=ip, dst=ip_source, ttl=destination_ttl_value, flags='DF')
reply_tcp = TCP(sport=self.smb_port, dport=sport, seq=0, ack=attacker_seq, flags='RA', window=destination_win_value,
options=[('MSS', destination_mss_value)])
reply = (reply_ether / reply_ip / reply_tcp)
reply.time = timestamp_reply
packets.append(reply)
pps = max(getIntervalPPS(complement_interval_pps, timestamp_next_pkt), 10)
timestamp_next_pkt = update_timestamp(timestamp_next_pkt, pps)
# store end time of attack
self.attack_end_utime = packets[-1].time
# write attack packets to pcap
pcap_path = self.write_attack_pcap(sorted(packets, key=lambda pkt: pkt.time))
# return packets sorted by packet time_sec_start
return len(packets), pcap_path