import logging import random as rnd import scapy.layers.inet as inet from scapy.layers.smb import * import Attack.AttackParameters as atkParam import Attack.BaseAttack as BaseAttack import ID2TLib.SMB2 as SMB2 import ID2TLib.SMBLib as SMBLib import ID2TLib.Utility as Util logging.getLogger("scapy.runtime").setLevel(logging.ERROR) # noinspection PyPep8 class SMBScanAttack(BaseAttack.BaseAttack): def __init__(self): """ Creates a new instance of the SMBScanAttack. """ # Initialize attack super(SMBScanAttack, self).__init__("SmbScan Attack", "Injects an SMB scan", "Scanning/Probing") self.host_os = Util.get_rnd_os() # Define allowed parameters and their type self.supported_params.update({ atkParam.Parameter.IP_SOURCE: atkParam.ParameterTypes.TYPE_IP_ADDRESS, atkParam.Parameter.IP_DESTINATION: atkParam.ParameterTypes.TYPE_IP_ADDRESS, atkParam.Parameter.PORT_SOURCE: atkParam.ParameterTypes.TYPE_PORT, atkParam.Parameter.MAC_SOURCE: atkParam.ParameterTypes.TYPE_MAC_ADDRESS, atkParam.Parameter.MAC_DESTINATION: atkParam.ParameterTypes.TYPE_MAC_ADDRESS, atkParam.Parameter.INJECT_AT_TIMESTAMP: atkParam.ParameterTypes.TYPE_FLOAT, atkParam.Parameter.INJECT_AFTER_PACKET: atkParam.ParameterTypes.TYPE_PACKET_POSITION, atkParam.Parameter.IP_SOURCE_RANDOMIZE: atkParam.ParameterTypes.TYPE_BOOLEAN, atkParam.Parameter.PACKETS_PER_SECOND: atkParam.ParameterTypes.TYPE_FLOAT, atkParam.Parameter.PORT_SOURCE_RANDOMIZE: atkParam.ParameterTypes.TYPE_BOOLEAN, atkParam.Parameter.HOSTING_IP: atkParam.ParameterTypes.TYPE_IP_ADDRESS, atkParam.Parameter.HOSTING_VERSION: atkParam.ParameterTypes.TYPE_STRING, atkParam.Parameter.SOURCE_PLATFORM: atkParam.ParameterTypes.TYPE_STRING, atkParam.Parameter.PROTOCOL_VERSION: atkParam.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. """ # PARAMETERS: initialize with default values # (values are overwritten if user specifies them) most_used_ip_address = self.statistics.get_most_used_ip_address() self.add_param_value(atkParam.Parameter.IP_SOURCE, most_used_ip_address) self.add_param_value(atkParam.Parameter.IP_SOURCE_RANDOMIZE, 'False') self.add_param_value(atkParam.Parameter.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(atkParam.Parameter.IP_DESTINATION, ip_destinations) 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(atkParam.Parameter.MAC_DESTINATION, destination_mac) self.add_param_value(atkParam.Parameter.PORT_SOURCE, rnd.randint(1024, 65535)) self.add_param_value(atkParam.Parameter.PORT_SOURCE_RANDOMIZE, 'True') self.add_param_value(atkParam.Parameter.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(atkParam.Parameter.INJECT_AFTER_PACKET, rnd.randint(0, self.statistics.get_packet_count())) rnd_ip_count = self.statistics.get_ip_address_count() // 2 self.add_param_value(atkParam.Parameter.HOSTING_IP, self.statistics.get_random_ip_address(rnd_ip_count)) self.add_param_value(atkParam.Parameter.HOSTING_VERSION, SMBLib.get_smb_version(platform=self.host_os)) self.add_param_value(atkParam.Parameter.SOURCE_PLATFORM, Util.get_rnd_os()) self.add_param_value(atkParam.Parameter.PROTOCOL_VERSION, "1") def generate_attack_packets(self): """ Creates the attack packets. """ pps = self.get_param_value(atkParam.Parameter.PACKETS_PER_SECOND) # Calculate complement packet rates of the background traffic for each interval complement_interval_pps = self.statistics.calculate_complement_packet_rates(pps) # Timestamp timestamp_next_pkt = self.get_param_value(atkParam.Parameter.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(atkParam.Parameter.IP_SOURCE) ip_destinations = self.get_param_value(atkParam.Parameter.IP_DESTINATION) hosting_ip = self.get_param_value(atkParam.Parameter.HOSTING_IP) mac_source = self.get_param_value(atkParam.Parameter.MAC_SOURCE) mac_dest = self.get_param_value(atkParam.Parameter.MAC_DESTINATION) # Check smb version smb_version = self.get_param_value(atkParam.Parameter.PROTOCOL_VERSION) if smb_version not in SMBLib.smb_versions: SMBLib.invalid_smb_version(smb_version) hosting_version = self.get_param_value(atkParam.Parameter.HOSTING_VERSION) if hosting_version not in SMBLib.smb_versions: SMBLib.invalid_smb_version(hosting_version) # Check source platform src_platform = self.get_param_value(atkParam.Parameter.SOURCE_PLATFORM).lower() self.packets = [] # randomize source ports according to platform, if specified if self.get_param_value(atkParam.Parameter.PORT_SOURCE_RANDOMIZE): sport = Util.generate_source_port_from_platform(src_platform) else: sport = self.get_param_value(atkParam.Parameter.PORT_SOURCE) # No destination IP was specified, but a destination MAC was specified, generate IP that fits MAC if isinstance(ip_destinations, list) and isinstance(mac_dest, str): ip_destinations = self.statistics.get_ip_address_from_mac(mac_dest) if len(ip_destinations) == 0: ip_destinations = self.generate_random_ipv4_address("Unknown", 1) # Check ip.src == ip.dst self.ip_src_dst_equal_check(ip_source, ip_destinations) ip_dests = [] if isinstance(ip_destinations, list): ip_dests = ip_destinations else: ip_dests.append(ip_destinations) if isinstance(ip_dests, list): rnd.shuffle(ip_dests) # Randomize source IP, if specified if self.get_param_value(atkParam.Parameter.IP_SOURCE_RANDOMIZE): ip_source = self.generate_random_ipv4_address("Unknown", 1) while ip_source in ip_dests: ip_source = self.generate_random_ipv4_address("Unknown", 1) mac_source = self.statistics.get_mac_address(str(ip_source)) if len(mac_source) == 0: mac_source = self.generate_random_mac_address() # Get MSS, TTL and Window size value for source IP source_mss_value, source_ttl_value, source_win_value = self.get_ip_data(ip_source) for ip in ip_dests: if ip != ip_source: # Get destination Mac Address mac_destination = self.statistics.get_mac_address(str(ip)) if len(mac_destination) == 0: if isinstance(mac_dest, str): if len(self.statistics.get_ip_address_from_mac(mac_dest)) != 0: ip = self.statistics.get_ip_address_from_mac(mac_dest) self.ip_src_dst_equal_check(ip_source, ip) mac_destination = mac_dest else: mac_destination = self.generate_random_mac_address() # Get MSS, TTL and Window size value for destination IP destination_mss_value, destination_ttl_value, destination_win_value = self.get_ip_data(ip) min_delay, max_delay = self.get_reply_delay(ip) # New connection, new random TCP sequence numbers attacker_seq = rnd.randint(1000, 50000) victim_seq = rnd.randint(1000, 50000) # Randomize source port for each connection if specified if self.get_param_value(atkParam.Parameter.PORT_SOURCE_RANDOMIZE): sport = Util.generate_source_port_from_platform(src_platform, sport) # 1) Build request package request_ether = inet.Ether(src=mac_source, dst=mac_destination) request_ip = inet.IP(src=ip_source, dst=ip, ttl=source_ttl_value, flags='DF') request_tcp = inet.TCP(sport=sport, dport=SMBLib.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 self.packets.append(request) # Update timestamp for next package timestamp_reply = Util.update_timestamp(timestamp_next_pkt, pps, min_delay) while timestamp_reply <= timestamp_prv_reply: timestamp_reply = Util.update_timestamp(timestamp_prv_reply, pps, min_delay) timestamp_prv_reply = timestamp_reply if ip in hosting_ip: # 2) Build TCP packages for ip that hosts SMB # destination sends SYN, ACK reply_ether = inet.Ether(src=mac_destination, dst=mac_source) reply_ip = inet.IP(src=ip, dst=ip_source, ttl=destination_ttl_value, flags='DF') reply_tcp = inet.TCP(sport=SMBLib.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 self.packets.append(reply) # requester confirms, ACK confirm_ether = request_ether confirm_ip = request_ip confirm_tcp = inet.TCP(sport=sport, dport=SMBLib.smb_port, seq=attacker_seq, ack=victim_seq, window=source_win_value, flags='A') confirm = (confirm_ether / confirm_ip / confirm_tcp) timestamp_confirm = Util.update_timestamp(timestamp_reply, pps, min_delay) confirm.time = timestamp_confirm self.packets.append(confirm) smb_mid = rnd.randint(1, 65535) smb_pid = rnd.randint(1, 65535) smb_req_tail_arr = [] smb_req_tail_size = 0 # select dialects based on smb version if smb_version is "1": smb_req_dialects = SMBLib.smb_dialects[0:6] else: smb_req_dialects = SMBLib.smb_dialects if len(smb_req_dialects) == 0: smb_req_tail_arr.append(SMBNegociate_Protocol_Request_Tail()) smb_req_tail_size = len(SMBNegociate_Protocol_Request_Tail()) else: for dia in smb_req_dialects: smb_req_tail_arr.append(SMBNegociate_Protocol_Request_Tail(BufferData=dia)) smb_req_tail_size += len(SMBNegociate_Protocol_Request_Tail(BufferData=dia)) smb_req_head = SMBNegociate_Protocol_Request_Header(Flags2=0x2801, PID=smb_pid, MID=smb_mid, ByteCount=smb_req_tail_size) smb_req_length = len(smb_req_head) + smb_req_tail_size smb_req_net_bio = NBTSession(TYPE=0x00, LENGTH=smb_req_length) smb_req_tcp = inet.TCP(sport=sport, dport=SMBLib.smb_port, flags='PA', seq=attacker_seq, ack=victim_seq) smb_req_ip = inet.IP(src=ip_source, dst=ip, ttl=source_ttl_value) smb_req_ether = inet.Ether(src=mac_source, dst=mac_destination) attacker_seq += len(smb_req_net_bio) + len(smb_req_head) + smb_req_tail_size smb_req_combined = (smb_req_ether / smb_req_ip / smb_req_tcp / smb_req_net_bio / smb_req_head) for i in range(0, len(smb_req_tail_arr)): smb_req_combined = smb_req_combined / smb_req_tail_arr[i] timestamp_smb_req = Util.update_timestamp(timestamp_confirm, pps, min_delay) smb_req_combined.time = timestamp_smb_req self.packets.append(smb_req_combined) # destination confirms SMB request package reply_tcp = inet.TCP(sport=SMBLib.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 = Util.update_timestamp(timestamp_smb_req, pps, min_delay) confirm_smb_req.time = timestamp_reply self.packets.append(confirm_smb_req) # smb response package first_timestamp = time.mktime(time.strptime(self.statistics.get_pcap_timestamp_start()[:19], "%Y-%m-%d %H:%M:%S")) server_guid, security_blob, capabilities, data_size, server_start_time =\ SMBLib.get_smb_platform_data(self.host_os, first_timestamp) timestamp_smb_rsp = Util.update_timestamp(timestamp_reply, pps, min_delay) diff = timestamp_smb_rsp - timestamp_smb_req begin = Util.get_filetime_format(timestamp_smb_req + diff * 0.1) end = Util.get_filetime_format(timestamp_smb_rsp - diff * 0.1) system_time = rnd.randint(begin, end) if smb_version is not "1" and hosting_version is not "1": smb_rsp_paket = SMB2.SMB2_SYNC_Header(Flags=1) smb_rsp_negotiate_body =\ SMB2.SMB2_Negotiate_Protocol_Response(DialectRevision=0x02ff, SecurityBufferOffset=124, SecurityBufferLength=len(security_blob), SecurityBlob=security_blob, Capabilities=capabilities, MaxTransactSize=data_size, MaxReadSize=data_size, MaxWriteSize=data_size, SystemTime=system_time, ServerStartTime=server_start_time, ServerGuid=server_guid) smb_rsp_length = len(smb_rsp_paket) + len(smb_rsp_negotiate_body) else: smb_rsp_paket =\ SMBNegociate_Protocol_Response_Advanced_Security(Start="\xffSMB", PID=smb_pid, MID=smb_mid, DialectIndex=5, SecurityBlob=security_blob) smb_rsp_length = len(smb_rsp_paket) smb_rsp_net_bio = NBTSession(TYPE=0x00, LENGTH=smb_rsp_length) smb_rsp_tcp = inet.TCP(sport=SMBLib.smb_port, dport=sport, flags='PA', seq=victim_seq, ack=attacker_seq) smb_rsp_ip = inet.IP(src=ip, dst=ip_source, ttl=destination_ttl_value) smb_rsp_ether = inet.Ether(src=mac_destination, dst=mac_source) victim_seq += len(smb_rsp_net_bio) + len(smb_rsp_paket) if smb_version is not "1" and hosting_version is not "1": victim_seq += len(smb_rsp_negotiate_body) smb_rsp_combined = (smb_rsp_ether / smb_rsp_ip / smb_rsp_tcp / smb_rsp_net_bio / smb_rsp_paket) if smb_version is not "1" and hosting_version is not "1": smb_rsp_combined = (smb_rsp_combined / smb_rsp_negotiate_body) smb_rsp_combined.time = timestamp_smb_rsp self.packets.append(smb_rsp_combined) # source confirms SMB response package confirm_tcp = inet.TCP(sport=sport, dport=SMBLib.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 = Util.update_timestamp(timestamp_smb_rsp, pps, min_delay) confirm_smb_res.time = timestamp_confirm self.packets.append(confirm_smb_res) # attacker sends FIN ACK confirm_tcp = inet.TCP(sport=sport, dport=SMBLib.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 = Util.update_timestamp(timestamp_confirm, pps, min_delay) source_fin_ack.time = timestamp_src_fin_ack attacker_seq += 1 self.packets.append(source_fin_ack) # victim sends FIN ACK reply_tcp = inet.TCP(sport=SMBLib.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 = Util.update_timestamp(timestamp_src_fin_ack, pps, min_delay) victim_seq += 1 destination_fin_ack.time = timestamp_dest_fin_ack self.packets.append(destination_fin_ack) # source sends final ACK confirm_tcp = inet.TCP(sport=sport, dport=SMBLib.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 = Util.update_timestamp(timestamp_dest_fin_ack, pps, min_delay) final_ack.time = timestamp_final_ack self.packets.append(final_ack) else: # Build RST package reply_ether = inet.Ether(src=mac_destination, dst=mac_source) reply_ip = inet.IP(src=ip, dst=ip_source, ttl=destination_ttl_value, flags='DF') reply_tcp = inet.TCP(sport=SMBLib.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 self.packets.append(reply) pps = max(Util.get_interval_pps(complement_interval_pps, timestamp_next_pkt), 10) timestamp_next_pkt = Util.update_timestamp(timestamp_next_pkt, pps) def generate_attack_pcap(self): """ Creates a pcap containing the attack packets. :return: The location of the generated pcap file. """ # store end time of attack self.attack_end_utime = self.packets[-1].time # write attack self.packets to pcap pcap_path = self.write_attack_pcap(sorted(self.packets, key=lambda pkt: pkt.time)) # return packets sorted by packet time_sec_start return len(self.packets), pcap_path