import logging
from random import randint, 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.utils import RawPcapReader
from scapy.layers.inet import IP, Ether, TCP, RandShort
class EternalBlueExploit(BaseAttack.BaseAttack):
template_scan_pcap_path = "resources/Win7_eternalblue_scan.pcap"
template_attack_pcap_path = "resources/Win7_eternalblue_exploit.pcap"
# SMB port
smb_port = 445
# Empirical values from Metasploit experiments
minDefaultPort = 30000
maxDefaultPort = 50000
last_conn_dst_port = 4444
def __init__(self):
"""
Creates a new instance of the EternalBlue Exploit.
"""
# Initialize attack
super(EternalBlueExploit, self).__init__("EternalBlue Exploit", "Injects an EternalBlue exploit'",
"Privilege elevation")
# Define allowed parameters and their type
self.supported_params = {
Param.MAC_SOURCE: ParameterTypes.TYPE_MAC_ADDRESS,
Param.IP_SOURCE: ParameterTypes.TYPE_IP_ADDRESS,
Param.PORT_SOURCE: ParameterTypes.TYPE_PORT,
Param.MAC_DESTINATION: ParameterTypes.TYPE_MAC_ADDRESS,
Param.IP_DESTINATION: ParameterTypes.TYPE_IP_ADDRESS,
Param.PORT_DESTINATION: ParameterTypes.TYPE_PORT,
Param.INJECT_AT_TIMESTAMP: ParameterTypes.TYPE_FLOAT,
Param.INJECT_AFTER_PACKET: ParameterTypes.TYPE_PACKET_POSITION,
Param.PACKETS_PER_SECOND: ParameterTypes.TYPE_FLOAT
}
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 utilsvalues
# (values are overwritten if user specifies them)
# Attacker configuration
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]
random_ip_address = self.statistics.get_random_ip_address()
self.add_param_value(Param.IP_SOURCE, random_ip_address)
self.add_param_value(Param.MAC_SOURCE, self.statistics.get_mac_address(random_ip_address))
self.add_param_value(Param.PORT_SOURCE, randint(self.minDefaultPort, self.maxDefaultPort))
# Victim configuration
self.add_param_value(Param.IP_DESTINATION, most_used_ip_address)
destination_mac = self.statistics.get_mac_address(most_used_ip_address)
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_DESTINATION, self.smb_port)
# Attack configuration
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()))
def generate_attack_pcap(self):
def update_timestamp(timestamp, pps):
"""
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.
"""
# Calculate the request timestamp
# A distribution 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())
def getIntervalPPS(complement_interval_pps, timestamp):
"""
Gets the packet rate (pps) in specific time interval.
:return: the corresponding packet rate for 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
# Timestamp
timestamp_next_pkt = self.get_param_value(Param.INJECT_AT_TIMESTAMP)
pps = self.get_param_value(Param.PACKETS_PER_SECOND)
# calculate complement packet rates of BG traffic per interval
complement_interval_pps = self.statistics.calculate_complement_packet_rates(pps)
# Initialize parameters
packets = []
mac_source = self.get_param_value(Param.MAC_SOURCE)
ip_source = self.get_param_value(Param.IP_SOURCE)
port_source = self.get_param_value(Param.PORT_SOURCE)
mac_destination = self.get_param_value(Param.MAC_DESTINATION)
ip_destination = self.get_param_value(Param.IP_DESTINATION)
port_destination = self.get_param_value(Param.PORT_DESTINATION)
# Check ip.src == ip.dst
self.ip_src_dst_equal_check(ip_source, ip_destination)
path_attack_pcap = None
# 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)")
destination_ttl_dist = self.statistics.get_ttl_distribution(ip_destination)
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
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)
else:
source_win_dist = self.statistics.get_win_distribution(self.statistics.get_most_used_ip_address())
source_win_prob_dict = Lea.fromValFreqsDict(source_win_dist)
destination_win_dist = self.statistics.get_win_distribution(ip_destination)
if len(destination_win_dist) > 0:
destination_win_prob_dict = Lea.fromValFreqsDict(destination_win_dist)
else:
destination_win_dist = self.statistics.get_win_distribution(self.statistics.get_most_used_ip_address())
destination_win_prob_dict = Lea.fromValFreqsDict(destination_win_dist)
# Set MSS (Maximum Segment Size) based on MSS distribution of IP address
mss_value = self.statistics.process_db_query("most_used(mssValue)")
if not mss_value:
mss_value = 1465
# Scan (MS17) for EternalBlue
# Read Win7_eternalblue_scan pcap file
orig_ip_dst = None
exploit_raw_packets = RawPcapReader(self.template_scan_pcap_path)
inter_arrival_times = self.get_inter_arrival_time(exploit_raw_packets)
exploit_raw_packets = RawPcapReader(self.template_scan_pcap_path)
source_origin_wins, destination_origin_wins = {}, {}
for pkt_num, pkt in enumerate(exploit_raw_packets):
eth_frame = Ether(pkt[0])
ip_pkt = eth_frame.payload
tcp_pkt = ip_pkt.payload
if pkt_num == 0:
if tcp_pkt.getfieldval("dport") == self.smb_port:
orig_ip_dst = ip_pkt.getfieldval("dst") # victim IP
# Request
if ip_pkt.getfieldval("dst") == orig_ip_dst: # victim IP
# Ether
eth_frame.setfieldval("src", mac_source)
eth_frame.setfieldval("dst", mac_destination)
# IP
ip_pkt.setfieldval("src", ip_source)
ip_pkt.setfieldval("dst", ip_destination)
ip_pkt.setfieldval("ttl", source_ttl_value)
# TCP
tcp_pkt.setfieldval("sport",port_source)
tcp_pkt.setfieldval("dport",port_destination)
## Window Size (mapping)
source_origin_win = tcp_pkt.getfieldval("window")
if source_origin_win not in source_origin_wins:
source_origin_wins[source_origin_win] = source_win_prob_dict.random()
new_win = source_origin_wins[source_origin_win]
tcp_pkt.setfieldval("window", new_win)
## MSS
tcp_options = tcp_pkt.getfieldval("options")
if tcp_options:
if tcp_options[0][0] == "MSS":
tcp_options [0] = ("MSS",mss_value)
tcp_pkt.setfieldval("options", tcp_options)
new_pkt = (eth_frame / ip_pkt / tcp_pkt)
new_pkt.time = timestamp_next_pkt
pps = max(getIntervalPPS(complement_interval_pps, timestamp_next_pkt), 10)
timestamp_next_pkt = update_timestamp(timestamp_next_pkt, pps) + inter_arrival_times[pkt_num]#float(timeSteps.random())
# Reply
else:
# Ether
eth_frame.setfieldval("src", mac_destination)
eth_frame.setfieldval("dst", mac_source)
# IP
ip_pkt.setfieldval("src", ip_destination)
ip_pkt.setfieldval("dst", ip_source)
ip_pkt.setfieldval("ttl", destination_ttl_value)
# TCP
tcp_pkt.setfieldval("dport", port_source)
tcp_pkt.setfieldval("sport",port_destination)
## Window Size
destination_origin_win = tcp_pkt.getfieldval("window")
if destination_origin_win not in destination_origin_wins:
destination_origin_wins[destination_origin_win] = destination_win_prob_dict.random()
new_win = destination_origin_wins[destination_origin_win]
tcp_pkt.setfieldval("window", new_win)
## MSS
tcp_options = tcp_pkt.getfieldval("options")
if tcp_options:
if tcp_options[0][0] == "MSS":
tcp_options[0] = ("MSS", mss_value)
tcp_pkt.setfieldval("options", tcp_options)
new_pkt = (eth_frame / ip_pkt / tcp_pkt)
timestamp_next_pkt = update_timestamp(timestamp_next_pkt, pps) + inter_arrival_times[pkt_num]#+ float(timeSteps.random())
new_pkt.time = timestamp_next_pkt
packets.append(new_pkt)
# Inject EternalBlue exploit packets
# Read Win7_eternalblue_exploit pcap file
exploit_raw_packets = RawPcapReader(self.template_attack_pcap_path)
port_source = randint(self.minDefaultPort,self.maxDefaultPort) # experiments show this range of ports
# conversations = {(ip.src, ip.dst, port.src, port.dst): packets}
conversations, orderList_conversations = self.packetsToConvs(exploit_raw_packets)
conv_start_timesamp = timestamp_next_pkt
for conv_index, conv in enumerate(orderList_conversations):
conv_start_timesamp = conv_start_timesamp + uniform(0.001,0.01) # the distance between the starts of the converstaions
timestamp_next_pkt = conv_start_timesamp
conv_pkts = conversations[conv]
inter_arrival_times = self.get_inter_arrival_time(conv_pkts)
if conv_index == len(orderList_conversations) - 2: # Not the last conversation
timestamp_next_pkt = packets[-1].time + uniform(0.001,0.01)
if conv_index != len(orderList_conversations)-1: # Not the last conversation
port_source += 2
for pkt_num, pkt in enumerate(conv_pkts):
eth_frame = Ether(pkt[0])
ip_pkt = eth_frame.payload
tcp_pkt = ip_pkt.payload
if pkt_num == 0:
if tcp_pkt.getfieldval("dport") == self.smb_port:
orig_ip_dst = ip_pkt.getfieldval("dst")
# Request
if ip_pkt.getfieldval("dst") == orig_ip_dst: # victim IP
# Ether
eth_frame.setfieldval("src", mac_source)
eth_frame.setfieldval("dst", mac_destination)
# IP
ip_pkt.setfieldval("src", ip_source)
ip_pkt.setfieldval("dst", ip_destination)
ip_pkt.setfieldval("ttl", source_ttl_value)
# TCP
tcp_pkt.setfieldval("sport", port_source)
tcp_pkt.setfieldval("dport", port_destination)
## Window Size
source_origin_win = tcp_pkt.getfieldval("window")
if source_origin_win not in source_origin_wins:
source_origin_wins[source_origin_win] = source_win_prob_dict.random()
new_win = source_origin_wins[source_origin_win]
tcp_pkt.setfieldval("window", new_win)
## MSS
tcp_options = tcp_pkt.getfieldval("options")
if tcp_options:
if tcp_options[0][0] == "MSS":
tcp_options[0] = ("MSS", mss_value)
tcp_pkt.setfieldval("options", tcp_options)
new_pkt = (eth_frame / ip_pkt / tcp_pkt)
new_pkt.time = timestamp_next_pkt
pps = max(getIntervalPPS(complement_interval_pps, timestamp_next_pkt), 10)
timestamp_next_pkt = update_timestamp(timestamp_next_pkt, pps) + inter_arrival_times[pkt_num] #float(timeSteps.random())
# Reply
else:
# Ether
eth_frame.setfieldval("src", mac_destination)
eth_frame.setfieldval("dst", mac_source)
# IP
ip_pkt.setfieldval("src", ip_destination)
ip_pkt.setfieldval("dst", ip_source)
ip_pkt.setfieldval("ttl", destination_ttl_value)
# TCP
tcp_pkt.setfieldval("dport", port_source)
tcp_pkt.setfieldval("sport", port_destination)
## Window Size
destination_origin_win = tcp_pkt.getfieldval("window")
if destination_origin_win not in destination_origin_wins:
destination_origin_wins[destination_origin_win] = destination_win_prob_dict.random()
new_win = destination_origin_wins[destination_origin_win]
tcp_pkt.setfieldval("window", new_win)
## MSS
tcp_options = tcp_pkt.getfieldval("options")
if tcp_options:
if tcp_options[0][0] == "MSS":
tcp_options[0] = ("MSS", mss_value)
tcp_pkt.setfieldval("options", tcp_options)
new_pkt = (eth_frame / ip_pkt / tcp_pkt)
pps = max(getIntervalPPS(complement_interval_pps, timestamp_next_pkt), 10)
timestamp_next_pkt = update_timestamp(timestamp_next_pkt, pps) + inter_arrival_times[pkt_num]#float(timeSteps.random())
new_pkt.time = timestamp_next_pkt
packets.append(new_pkt)
else: # Last conversation where the victim start a connection with the attacker
timestamp_next_pkt = packets[-1].time + uniform(0.001, 0.01)
port_source = randint(self.minDefaultPort,self.maxDefaultPort)
for pkt_num, pkt in enumerate(conv_pkts):
eth_frame = Ether(pkt[0])
ip_pkt = eth_frame.payload
tcp_pkt = ip_pkt.payload
# Request
if tcp_pkt.getfieldval("dport") == self.last_conn_dst_port:
# Ether
eth_frame.setfieldval("src", mac_destination)
eth_frame.setfieldval("dst", mac_source)
# IP
ip_pkt.setfieldval("src", ip_destination)
ip_pkt.setfieldval("dst", ip_source)
ip_pkt.setfieldval("ttl", destination_ttl_value)
# TCP
tcp_pkt.setfieldval("sport", port_source)
# destination port is fixed 4444
## Window Size
destination_origin_win = tcp_pkt.getfieldval("window")
if destination_origin_win not in destination_origin_wins:
destination_origin_wins[destination_origin_win] = destination_win_prob_dict.random()
new_win = destination_origin_wins[destination_origin_win]
tcp_pkt.setfieldval("window", new_win)
## MSS
tcp_options = tcp_pkt.getfieldval("options")
if tcp_options:
if tcp_options[0][0] == "MSS":
tcp_options[0] = ("MSS", mss_value)
tcp_pkt.setfieldval("options", tcp_options)
new_pkt = (eth_frame / ip_pkt / tcp_pkt)
new_pkt.time = timestamp_next_pkt
pps = max(getIntervalPPS(complement_interval_pps, timestamp_next_pkt), 10)
timestamp_next_pkt = update_timestamp(timestamp_next_pkt, pps) + inter_arrival_times[pkt_num]# float(timeSteps.random())
# Reply
else:
# Ether
eth_frame.setfieldval("src", mac_source)
eth_frame.setfieldval("dst", mac_destination)
# IP
ip_pkt.setfieldval("src", ip_source)
ip_pkt.setfieldval("dst", ip_destination)
ip_pkt.setfieldval("ttl", source_ttl_value)
# TCP
tcp_pkt.setfieldval("dport", port_source)
# source port is fixed 4444
## Window Size
source_origin_win = tcp_pkt.getfieldval("window")
if source_origin_win not in source_origin_wins:
source_origin_wins[source_origin_win] = source_win_prob_dict.random()
new_win = source_origin_wins[source_origin_win]
tcp_pkt.setfieldval("window", new_win)
## MSS
tcp_options = tcp_pkt.getfieldval("options")
if tcp_options:
if tcp_options[0][0] == "MSS":
tcp_options[0] = ("MSS", mss_value)
tcp_pkt.setfieldval("options", tcp_options)
new_pkt = (eth_frame / ip_pkt / tcp_pkt)
pps = max(getIntervalPPS(complement_interval_pps, timestamp_next_pkt), 10)
timestamp_next_pkt = update_timestamp(timestamp_next_pkt, pps) + inter_arrival_times[pkt_num]# float(timeSteps.random())
new_pkt.time = timestamp_next_pkt
packets.append(new_pkt)
# Store timestamp of first packet (for attack label)
self.attack_start_utime = packets[0].time
self.attack_end_utime = packets[-1].time
if len(packets) > 0:
packets = sorted(packets, key=lambda pkt: pkt.time)
path_attack_pcap = self.write_attack_pcap(packets, True, path_attack_pcap)
# return packets sorted by packet time_sec_start
# pkt_num+1: because pkt_num starts at 0
return pkt_num + 1, path_attack_pcap