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- # Created by Aidmar
- 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):
- # Metasploit default packet rate
- maxDefaultPPS = 100
- minDefaultPPS = 5
- # SMB port
- smb_port = 445
- # Empirical values from Metasploit experiments
- minDefaultPort = 30000
- maxDefaultPort = 50000
- last_conn_dst_port = 4444
- def __init__(self, statistics, pcap_file_path):
- """
- Creates a new instance of the EternalBlue Exploit.
- :param statistics: A reference to the statistics class.
- """
- # Initialize attack
- super(EternalBlueExploit, self).__init__(statistics, "EternalBlue Exploit", "Injects an EternalBlue exploit'",
- "Resource Exhaustion")
- # Define allowed parameters and their type
- self.supported_params = {
- Param.MAC_SOURCE: ParameterTypes.TYPE_MAC_ADDRESS,
- Param.IP_SOURCE: ParameterTypes.TYPE_IP_ADDRESS,
- Param.MAC_DESTINATION: ParameterTypes.TYPE_MAC_ADDRESS,
- Param.IP_DESTINATION: ParameterTypes.TYPE_IP_ADDRESS,
- Param.INJECT_AT_TIMESTAMP: ParameterTypes.TYPE_FLOAT,
- Param.INJECT_AFTER_PACKET: ParameterTypes.TYPE_PACKET_POSITION,
- Param.PACKETS_PER_SECOND: ParameterTypes.TYPE_FLOAT
- }
- # PARAMETERS: initialize with default utilsvalues
- # (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.MAC_SOURCE, self.statistics.get_mac_address(most_used_ip_address))
- self.add_param_value(Param.INJECT_AFTER_PACKET, randint(0, self.statistics.get_packet_count()))
- self.add_param_value(Param.PACKETS_PER_SECOND,self.maxDefaultPPS)
- # victim configuration
- random_ip_address = self.statistics.get_random_ip_address()
- self.add_param_value(Param.IP_DESTINATION, random_ip_address)
- destination_mac = self.statistics.get_mac_address(random_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)
- def generate_attack_pcap(self):
- def update_timestamp(timestamp, pps, maxdelay):
- """
- 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.
- """
- return timestamp + uniform(1 / pps, maxdelay)
- # Aidmar
- 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)
- # TO-DO: find better pkt rate
- pps = self.get_param_value(Param.PACKETS_PER_SECOND)
- randomdelay = Lea.fromValFreqsDict({1 / pps: 70, 2 / pps: 30, 5 / pps: 15, 10 / pps: 3})
- # Aidmar - 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)
- # Aidmar - check ip.src == ip.dst
- self.ip_src_dst_equal_check(ip_source, ip_destination)
- path_attack_pcap = None
- minDelay, maxDelay = self.get_reply_delay(ip_destination)
- # 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)")
- # Scan (MS17) for EternalBlue
- # Read Win7_eternalblue_scan_vulnerable pcap file
- orig_ip_dst = None
- exploit_raw_packets = RawPcapReader("resources/Win7_eternalblue_scan.pcap")
- port_source = randint(self.minDefaultPort,self.maxDefaultPort) # experiments show this range of ports
- 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)
- new_pkt = (eth_frame / ip_pkt / tcp_pkt)
- new_pkt.time = timestamp_next_pkt
- maxdelay = randomdelay.random()
- pps = max(getIntervalPPS(complement_interval_pps, timestamp_next_pkt), self.minDefaultPPS)
- timestamp_next_pkt = update_timestamp(timestamp_next_pkt, pps, maxdelay)
- # 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)
- new_pkt = (eth_frame / ip_pkt / tcp_pkt)
- timestamp_next_pkt = timestamp_next_pkt + uniform(minDelay, maxDelay)
- new_pkt.time = timestamp_next_pkt
- packets.append(new_pkt)
- # Inject EternalBlue exploit packets
- # Read Win7_eternalblue_exploit pcap file
- exploit_raw_packets = RawPcapReader("resources/Win7_eternalblue_exploit.pcap")
- 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)
- # the last two connections have special treatment, they start after the other connections finish
- # TO-DO
- 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]
- 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")
- # defining req/rep should be adapted to fit the last converstaion where
- # victim starts a connection with the attacker
- # 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)
- new_pkt = (eth_frame / ip_pkt / tcp_pkt)
- new_pkt.time = timestamp_next_pkt
- maxdelay = randomdelay.random()
- pps = max(getIntervalPPS(complement_interval_pps, timestamp_next_pkt), self.minDefaultPPS)
- timestamp_next_pkt = update_timestamp(timestamp_next_pkt, pps, maxdelay)
- # 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)
- new_pkt = (eth_frame / ip_pkt / tcp_pkt)
- timestamp_next_pkt = timestamp_next_pkt + uniform(minDelay, maxDelay)
- 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
- # defining req/rep should be adapted to fit the last converstaion where
- # victim start a connection with the attacker
- # 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)
- new_pkt = (eth_frame / ip_pkt / tcp_pkt)
- new_pkt.time = timestamp_next_pkt
- maxdelay = randomdelay.random()
- pps = max(getIntervalPPS(complement_interval_pps, timestamp_next_pkt), self.minDefaultPPS)
- timestamp_next_pkt = update_timestamp(timestamp_next_pkt, pps, maxdelay)
- # 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)
- new_pkt = (eth_frame / ip_pkt / tcp_pkt)
- timestamp_next_pkt = timestamp_next_pkt + uniform(minDelay, maxDelay)
- 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
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