def _filter_packet(self, packet: scapy.Packet) -> bool:
if not self._filter_clauses:
return True
clause_evals = []
for ((layer, attribute), value) in self._filter_clauses:
truthy_clause = True
try:
if layer[0] == '!':
truthy_clause = False
layer = layer[1:]
layer_reference = getattr(scapy, layer)
if attribute == 'exists':
clause_evals.append(
str(int(packet.haslayer(layer_reference))) == value)
else:
if packet.haslayer(layer_reference):
packet_layer = packet[layer_reference]
packet_attribute = str(getattr(packet_layer,
attribute))
clause_evals.append((
packet_attribute == value) if truthy_clause else (
packet_attribute != value))
else:
clause_evals.append(False)
except AttributeError as exc:
clause_evals.append(False)
return all(clause_evals)
def _callback(self, pkt: Packet) -> None:
log.debug(pkt.summary())
if pkt.haslayer(DNS) and pkt.getlayer(DNS).qr == 0:
if IP in pkt:
return self._disect_dns(pkt.getlayer(DNS), pkt[IP].src)
elif IPv6 in pkt:
return self._disect_dns(pkt.getlayer(DNS), pkt[IPv6].src, True)
def __init__(self, *args, **kwargs):
"""Constructor."""
self._anno = {}
self.__priv = {}
Packet.__init__(self, *args, **kwargs)
self.hide_defaults()
self._setup()
def handle_packet(self, packet: Packet) -> None:
try:
if packet.haslayer(Dot11) or packet.haslayer(Dot11FCS):
self.in_pkcs_queue.put(packet)
except Exception as e:
self.cmd.perror(
"[!] Exception while handling packet: {}\n{}".format(
e, packet.show(dump=True)))
def __init__(self, _pkt="", post_transform=None, _internal=0, _underlayer=None, config=None, **fields): # noqa: E501
"""
length=None means that the length must be managed by the user. If it's
defined, the field will always be length-long (padded with b"\\x00" if
needed)
"""
self._config = config
Packet.__init__(self, _pkt=_pkt, post_transform=post_transform,
_internal=_internal, _underlayer=_underlayer, **fields)
def __init__(self, *args, **kwargs):
# VERY IMPORTANT: Do this first, because the superclass will call back in
# to do_dissect().
self.fields_by_id = {f.pb_id: f for f in self.fields_desc}
self.fields_seen = []
self.dummy_count = 0
self.repr_output_suppressed = 0
Packet.__init__(self, *args, **kwargs)
return
def detect_ip_version_DNS(self, packet: Packet) -> Packet:
"""
This function crafts the DNS response.
"""
if packet.haslayer(IP):
return self.craft_MDNS_IP(packet)
elif packet.haslayer(IPv6):
return self.craft_MDNS_IPv6(packet)
def __init__(self, _pkt="", post_transform=None, _internal=0, _underlayer=None, config=None, **fields):
"""
length=None means that the length must be managed by the user. If it's
defined, the field will always be length-long (padded with b"\\x00" if
needed)
"""
self._config = config
Packet.__init__(self, _pkt=_pkt, post_transform=post_transform,
_internal=_internal, _underlayer=_underlayer, **fields)
def get_ips(pkt: Packet) -> Tuple[Optional[str], Optional[str]]:
if pkt.haslayer(ARP):
return (pkt[ARP].psrc, pkt[ARP].pdst)
if pkt.haslayer(IP):
return (pkt[IP].src, pkt[IP].dst)
if pkt.haslayer(IPv6):
return (pkt[IPv6].src, pkt[IPv6].dst)
return (None, None)
def get_app_protocol(pkt: Packet) -> Optional[str]:
if pkt.haslayer(ARP):
return "ARP"
if pkt.haslayer(ICMP):
return "ICMP"
else:
for layer in reversed(pkt.layers()):
name = layer.__name__
if name != "Raw":
return name
return pkt.lastlayer().__name__
def process_packet(pkt: scapy.Packet):
if pkt.haslayer(HTTPRequest):
url = pkt[HTTPRequest].Host.decode() + pkt[HTTPRequest].Path.decode()
method = pkt[HTTPRequest].Method.decode()
print('[{t}][{m}] HTTP Request >> {u}'.format(
t=dt.now().strftime('%Y-%m-%d %H:%M:%S'), u=url, m=method))
if show_raw and pkt.haslayer(scapy.Raw) and method == 'POST':
raw = pkt[scapy.Raw]
print(f'[*] Raw data: {raw.load}')
time.sleep(1)
def guess_payload_class(self, payload):
''' Decides if the payload is an ICAP Request or Response, or
something else '''
try:
icap_req = payload[:payload.index("\r\n")]
s1,s2,s3 = icap_req.split(" ") # @UnusedVariable s2
except:
return Packet.guess_payload_class(self, payload)
icap_versions = ["ICAP/0.9","ICAP/1.0","ICAP/1.1"]
for icap_version in icap_versions:
if s3 == icap_version:
return ICAPRequest
if s1 == icap_version:
return ICAPResponse
return Packet.guess_payload_class(self, payload)
def post_build(self, pkt, pay):
# add padding to ensure min packet length
padding = MIN_PACKET_LENGTH - (len(pkt + pay))
pay += b"\0" * padding
return Packet.post_build(self, pkt, pay)
def identify_packet(self, packet: Packet) -> None:
"""
This function detects the request type and send the response.
"""
if packet.haslayer(NBNSQueryRequest) and packet[IP].src != self.ip:
responses, ip_src, name, style = self.craft_NBNS_response(packet)
elif packet.haslayer(LLMNRQuery):
responses, ip_src, name, style = self.detect_LLMNR_type(packet)
elif packet.haslayer(DNS) and packet.haslayer(DNSQR):
responses, ip_src, name, style = self.detect_ip_version_DNS(packet)
else:
return None
for response in responses:
send(response, verbose=0, iface=self.iface)
logger.info(f"Protocol {style}, spoof {name} for {ip_src}")
def test_ip_tsb(ipval, tsbval, expected):
f0 = InstantPowerField('test', 0)
f1 = TSBField('test', 0)
pkt = Packet()
pay = f0.addfield(pkt, b'', ipval)
pay = f1.addfield(pkt, pay, tsbval)
assert pay == expected
def guess_payload_class(self, payload):
if self.setID == 2:
return Template
elif self.setID > 255:
return Data
else:
return Packet.guess_payload_class(self, payload)
def detect_LLMNR_type(self, packet: Packet) -> Packet:
"""
This function detects the IP version and DNSQR
type to forge the LLMNR response.
"""
if packet.haslayer(IP):
if packet[DNSQR].qtype == 28:
return self.craft_LLMNR_IP_type_28(packet)
else:
return self.craft_LLMNR_IP(packet)
elif packet.haslayer(IPv6):
if packet[DNSQR].qtype == 28:
return self.craft_LLMNR_IPv6_type_28(packet)
else:
return self.craft_LLMNR_IPv6(packet)
def __call__(self, packet: Packet):
is_TCP = packet.haslayer(TCP)
is_UDP = packet.haslayer(UDP)
# Perform TCP and UDP checks
if is_TCP or is_UDP:
proto_type = TCP if is_TCP else UDP
# Scan for using port 80 and the plaintext for privacy leaks
if (packet[proto_type].dport == 80) or (packet[proto_type].sport
== 80):
alert_port_80 = Alert(None,
"Sending data over unencrypted port.",
ALERT_TYPE.PRIVACY, SEVERITY.ALERT)
alert_port_80.alert()
self.__scan_plaintext(packet, proto_type)
# Monitor suspicious ports
print("Monitoring suspicious ports")
if packet[proto_type].dport in suspicious_ports:
alert_suspicious_ports = Alert(
None, "Suspicious destination port used: " +
packet[proto_type].dport, ALERT_TYPE.PRIVACY,
SEVERITY.WARN)
alert_suspicious_ports.alert()
print("Alert on bad port")
def guess_payload_class(self, payload):
if self.setID == 2:
return Template
elif self.setID > 255:
return Data
else:
return Packet.guess_payload_class(self, payload)
def guess_payload_class(self, payload):
# For frameID in the RT_CLASS_* range, use the RTC packet as payload
if (self.frameID >= 0x0100 and self.frameID < 0x1000) or \
(self.frameID >= 0x8000 and self.frameID < 0xFC00):
from scapy.contrib.pnio_rtc import PNIORealTime
return PNIORealTime
else:
return Packet.guess_payload_class(self, payload)
def guess_payload_class(self, payload):
# For frameID in the RT_CLASS_* range, use the RTC packet as payload
if (self.frameID >= 0x0100 and self.frameID < 0x1000) or \
(self.frameID >= 0x8000 and self.frameID < 0xFC00):
from scapy.contrib.pnio_rtc import PNIORealTime
return PNIORealTime
else:
return Packet.guess_payload_class(self, payload)
def __handle_pkt(self, packet: Packet) -> str:
'''Callback method to be executed by Scapy for every sniffed packet.'''
stat_key = None
message = {}
message['is_enip'] = packet.haslayer(ENIP_TCP) or packet.haslayer(
ENIP_UDP)
if packet.haslayer(ENIP_SendRRData) and packet[
'ENIP_SendRRData'].items[1]['CIP'].direction == 1: # Response
message['src'] = {}
message['dst'] = {}
message['src']['MAC'] = str.upper(packet['Ethernet'].src)
message['dst']['MAC'] = str.upper(packet['Ethernet'].dst)
message['src']['IP'] = packet['IP'].src
message['dst']['IP'] = packet['IP'].dst
message['rawdata'] = bytes(
packet['ENIP_SendRRData'].items[1]['Raw'])
message['data'] = self.read_cip_tag(message['rawdata'][0],
message['rawdata'][2:])
message['rawdata'] = hexlify(message['rawdata']).decode('utf-8')
if packet.haslayer(TCP):
stat_key = '{0:s}:{1:d}/{2:s}:{3:d}/TCP'.format(
packet['IP'].src, packet['TCP'].sport, packet['IP'].dst,
packet['TCP'].dport)
elif packet.haslayer(UDP):
stat_key = '{0:s}:{1:d}/{2:s}:{3:d}/UDP'.format(
packet['IP'].src, packet['UDP'].sport, packet['IP'].dst,
packet['UDP'].dport)
self.__messages.append(message)
elif packet.haslayer(IP):
message['src'] = {}
message['dst'] = {}
message['src']['MAC'] = str.upper(packet['Ethernet'].src)
message['dst']['MAC'] = str.upper(packet['Ethernet'].dst)
message['src']['IP'] = packet['IP'].src
message['dst']['IP'] = packet['IP'].dst
message['rawippayload'] = packet['IP'].payload
if packet.haslayer('TCP'):
stat_key = '{0:s}:{1:d}/{2:s}:{3:d}/TCP'.format(
packet['IP'].src, packet['TCP'].sport, packet['IP'].dst,
packet['TCP'].dport)
elif packet.haslayer('UDP'):
stat_key = '{0:s}:{1:d}/{2:s}:{3:d}/UDP'.format(
packet['IP'].src, packet['UDP'].sport, packet['IP'].dst,
packet['UDP'].dport)
else:
stat_key = '{0:s}/{1:s}/{2:s}'.format(
packet['IP'].src, packet['IP'].dst,
LOCAL_PROTOS[packet['IP'].proto])
self.__messages.append(message)
if stat_key is not None:
if stat_key in self.__packet_stats.keys():
self.__packet_stats[stat_key] += 1
else:
self.__packet_stats[stat_key] = 1
return None
def test_instant_power(ipval, expected):
f = InstantPowerField('test', 0)
pkt = Packet()
pay = f.addfield(pkt, b'', ipval)
assert pay == expected
rem, val = f.getfield(pkt, expected)
assert rem == expected[1:]
assert val == ipval & 0xFFF
def test_tsb(tsbval, expected):
f = TSBField('test', 0)
pkt = Packet()
pay = f.addfield(pkt, b'\x00\x00', tsbval)
assert pay == expected
rem, val = f.getfield(pkt, expected[1:])
assert rem == b''
assert val == tsbval
def add_packet(self, packet: scapy.Packet) -> None:
packet_item = QtWidgets.QListWidgetItem(packet.summary())
packet_item.setData(QtCore.Qt.UserRole, packet)
self._packet_list.addItem(packet_item)
if self._filter_packet(packet) and \
self.parent.parent.auto_select_action.isChecked():
self._packet_list.clearSelection()
self._packet_list.setCurrentItem(packet_item)
self._packet_list.scrollToBottom()
self.refresh_filter()
def guess_payload_class(self, payload): #to match the payload in the regular expression groups = IRC().regex(payload) command = groups[1] if command != None: if command in IRC.commands: # to check if it's a irc command return IRC return Packet.guess_payload_class(self, payload) #return default guess
def get_ttl(pkt: Packet) -> Optional[int]:
if IP in pkt:
return pkt.ttl
if IPv6 in pkt:
return pkt.hlim
for layer in reversed(pkt.layers()):
ttl = getattr(pkt[layer.__name__], "ttl", None)
if ttl:
return ttl
def guess_payload_class(self, payload):
prog = re.compile("^(OPTIONS|GET|HEAD|POST|PUT|DELETE|TRACE|CONNECT)")
result = prog.search(payload)
if result:
return HTTPrequest
else:
prog = re.compile("^HTTP/((0\.9)|(1\.0)|(1\.1))\ [0-9]{3}.*")
result = prog.search(payload)
if result:
return HTTPresponse
return Packet.guess_payload_class(self, payload)
def build_pkt_dict(self, No, pkt: Packet):
SingelRow = {
'No.': str(No),
'Time': str(time.time() - self.startTime)[0:6],
'Protocal': SnifferThread.get_packet_proto(pkt),
'Length': str(len(pkt)),
'Info': pkt.summary(),
}
SingelRow['Source'], SingelRow[
'Destination'] = SnifferThread.get_src_dst(pkt)
return SingelRow
def send_batch(self, batches):
packets_len = len(batches)
if packets_len == 0:
return
packet_list = PacketList()
for pkt in batches:
packet_raw = Packet(pkt)
packet_list.append(packet_raw)
sendp(packet_list, iface=self._options.iface, verbose=0)
def guess_payload_class(self, payload):
prog=re.compile("^(OPTIONS|GET|HEAD|POST|PUT|DELETE|TRACE|CONNECT)")
result=prog.search(payload)
if result:
return HTTPrequest
else:
prog=re.compile("^HTTP/((0\.9)|(1\.0)|(1\.1))\ [0-9]{3}.*")
result=prog.search(payload)
if result:
return HTTPresponse
return Packet.guess_payload_class(self, payload)
def on_wireshark(packet: Packet):
""" 抓包回调函数 """
if not packet.haslayer(MQTTPublish):
return
global packet_info
# 约定使用 utf-8 编码
packet_info['topic'] = packet.topic.decode('gbk')
packet_info['msg'] = packet.value.decode('gbk')
packet_info['src host'] = str(packet[IP].src)
packet_info['dst host'] = str(packet[IP].dst)
def guess_payload_class(self, payload):
''' Decides if the payload is an HTTP Request or Response, or
something else '''
prog = re.compile("^(OPTIONS|GET|HEAD|POST|PUT|DELETE|TRACE|CONNECT)")
result = prog.search(payload)
if result:
return HTTPRequest
else:
prog = re.compile("^HTTP/((0\.9)|(1\.0)|(1\.1))\ [0-9]{3}.*")
result = prog.search(payload)
if result:
return HTTPResponse
return Packet.guess_payload_class(self, payload)
def guess_payload_class(self, payload):
''' Decides if the payload is an HTTP Request or Response, or
something else '''
prog = re.compile("^(OPTIONS|GET|HEAD|POST|PUT|DELETE|TRACE|CONNECT)")
result = prog.search(payload)
if result:
return HTTPRequest
else:
prog = re.compile("^HTTP/((0\.9)|(1\.0)|(1\.1))\ [0-9]{3}.*")
result = prog.search(payload)
if result:
return HTTPResponse
return Packet.guess_payload_class(self, payload)
def process_sniffed_packet(packet: scapy.Packet):
if packet.haslayer(http.HTTPRequest):
# detecting url
url_to_print = ""
if packet[http.HTTPRequest]:
url_to_print += str(packet[http.HTTPRequest].Host, 'utf-8')
if packet[http.HTTPRequest]:
url_to_print += str(packet[http.HTTPRequest].Path, 'utf-8')
print(url_to_print)
url_to_print = ""
# detecting passwords
if packet.haslayer(scapy.Raw):
load = packet[scapy.Raw].load
login_keywords = ['user', 'username', 'uname', 'phone', 'mobile', 'email', 'mail'
'pass', 'password', 'code',
'remember']
for word in login_keywords:
if word in str(load):
print(bcolors.OKGREEN + "[+] suspected auth credits: " + str(load) + bcolors.ENDC)
break
def guess_payload_class(self, payload):
""" Decides if the payload is an HTTP Request or Response, or
something else """
try:
prog = re.compile(r"^(?:OPTIONS|GET|HEAD|POST|PUT|DELETE|TRACE|CONNECT) " r"(?:.+?) " r"HTTP/\d\.\d$")
req = payload[: payload.index("\r\n")]
result = prog.match(req)
if result:
return HTTPRequest
else:
prog = re.compile(r"^HTTP/\d\.\d \d\d\d .+?$")
result = prog.match(req)
if result:
return HTTPResponse
except:
pass
return Packet.guess_payload_class(self, payload)
def guess_payload_class(self, payload):
if self.type == 0:
return OpenFlowHello
#if self.type == 1:
# return OpenFlowError
elif self.type == 2:
return OpenFlowEchoRequest
elif self.type == 3:
return OpenFlowEchoReply
#if self.type == 4:
# return OpenFlowEchoReply
elif self.type == 5:
return OpenFlowFeaturesRequest
elif self.type == 6:
return OpenFlowFeaturesReply
else:
return Packet.guess_payload_class(self, payload)
def scapy_match(self, packet: Packet) -> None:
"""
This function gets IP address of matching packets with scapy.
"""
if packet.haslayer(ARP):
ip = packet[ARP].psrc
mode = "ARP"
else:
ip = packet[IP].src
mode = "IP"
debug(f"{mode} detected in packet...")
targets = self._targets
if ip in targets:
targets.remove(ip)
self._handle_UP(ip, mode, packet[Ether].src)
def handle_packet(self, packet: Packet):
if not DeviceSniffer.is_probe_request(packet):
return
try:
target_ssid = packet.getlayer(Dot11Elt).getfieldval("info").decode(
"utf-8")
if len(target_ssid) == 0:
return
source_mac_addr = packet.addr2.upper()
userid = self.user_querier.get_userid(target_ssid, source_mac_addr)
if userid is not None:
self.device_dectect_stream.on_next(userid)
except Exception as err:
self.device_dectect_stream.on_error(err)
def guess_payload_class(self, payload):
if self.type == 0:
return OpenFlowHello
#if self.type == 1:
# return OpenFlowError
elif self.type == 2:
return OpenFlowEchoRequest
elif self.type == 3:
return OpenFlowEchoReply
#if self.type == 4:
# return OpenFlowEchoReply
elif self.type == 5:
return OpenFlowFeaturesRequest
elif self.type == 6:
return OpenFlowFeaturesReply
else:
return Packet.guess_payload_class(self, payload)
def copy(self, *args, **kwargs):
"""Overwrite Packet.copy from Scapy Packet class."""
clone = Packet.copy(self, *args, **kwargs)
clone._setup()
newanno, keepkeys = {}, []
for k in self._anno:
keep = True
keep &= not isinstance(self.getanno(k), list) # do not copy lists
keep &= not isinstance(self.getanno(k), dict) # do not copy dicts
keep &= not (k in self.privanno())
keep &= not (k in const.ANNO_BLACKLIST)
if keep: keepkeys.append(k)
for k in keepkeys:
if isinstance(self._anno[k], Reference):
newanno[k] = Reference(self._anno[k])
else:
try: newanno[k] = deepcopy(self._anno[k]) # deepcopy item
except: sys.stderr.write("%s caused deepcopy error\n"%(k))
clone.writeanno(newanno)
return clone
def copy(self):
pkt = Packet.copy(self)
pkt._config = self._config
return pkt
def clone_with(self, *args, **kargs):
pkt = Packet.clone_with(self, *args, **kargs)
pkt._config = self._config
return pkt
