cti-python-stix2/stix2/v21/observables.py

964 lines
42 KiB
Python

"""STIX 2.1 Cyber Observable Objects.
Embedded observable object types, such as Email MIME Component, which is
embedded in Email Message objects, inherit from ``_STIXBase21`` instead of
_Observable and do not have a ``_type`` attribute.
"""
from collections import OrderedDict
import itertools
from ..custom import _custom_extension_builder, _custom_observable_builder
from ..exceptions import AtLeastOnePropertyError, DependentPropertiesError
from ..properties import (
BinaryProperty, BooleanProperty, DictionaryProperty,
EmbeddedObjectProperty, EnumProperty, ExtensionsProperty, FloatProperty,
HashesProperty, HexProperty, IDProperty, IntegerProperty, ListProperty,
ReferenceProperty, StringProperty, TimestampProperty, TypeProperty,
)
from .base import _Extension, _Observable, _STIXBase21
from .common import GranularMarking
class Artifact(_Observable):
"""For more detailed information on this object's properties, see
`the STIX 2.1 specification <https://docs.oasis-open.org/cti/stix/v2.1/cs01/stix-v2.1-cs01.html#_rqwyxo6gp7cv>`__.
"""
_type = 'artifact'
_properties = OrderedDict([
('type', TypeProperty(_type, spec_version='2.1')),
('id', IDProperty(_type, spec_version='2.1')),
('mime_type', StringProperty()),
('payload_bin', BinaryProperty()),
('url', StringProperty()),
('hashes', HashesProperty(spec_version='2.1')),
('encryption_algorithm', StringProperty()),
('decryption_key', StringProperty()),
('extensions', ExtensionsProperty(spec_version='2.1', enclosing_type=_type)),
('spec_version', StringProperty(fixed='2.1')),
('object_marking_refs', ListProperty(ReferenceProperty(valid_types='marking-definition', spec_version='2.1'))),
('granular_markings', ListProperty(GranularMarking)),
('defanged', BooleanProperty(default=lambda: False)),
])
_id_contributing_properties = ["hashes", "payload_bin"]
def _check_object_constraints(self):
super(Artifact, self)._check_object_constraints()
self._check_mutually_exclusive_properties(['payload_bin', 'url'])
self._check_properties_dependency(['hashes'], ['url'])
class AutonomousSystem(_Observable):
"""For more detailed information on this object's properties, see
`the STIX 2.1 specification <https://docs.oasis-open.org/cti/stix/v2.1/cs01/stix-v2.1-cs01.html#_bxebwa6l91fb>`__.
"""
_type = 'autonomous-system'
_properties = OrderedDict([
('type', TypeProperty(_type, spec_version='2.1')),
('id', IDProperty(_type, spec_version='2.1')),
('number', IntegerProperty(required=True)),
('name', StringProperty()),
('rir', StringProperty()),
('extensions', ExtensionsProperty(spec_version='2.1', enclosing_type=_type)),
('spec_version', StringProperty(fixed='2.1')),
('object_marking_refs', ListProperty(ReferenceProperty(valid_types='marking-definition', spec_version='2.1'))),
('granular_markings', ListProperty(GranularMarking)),
('defanged', BooleanProperty(default=lambda: False)),
])
_id_contributing_properties = ["number"]
class Directory(_Observable):
"""For more detailed information on this object's properties, see
`the STIX 2.1 specification <https://docs.oasis-open.org/cti/stix/v2.1/cs01/stix-v2.1-cs01.html#_vhpkn06q7fvl>`__.
"""
_type = 'directory'
_properties = OrderedDict([
('type', TypeProperty(_type, spec_version='2.1')),
('id', IDProperty(_type, spec_version='2.1')),
('path', StringProperty(required=True)),
('path_enc', StringProperty()),
# these are not the created/modified timestamps of the object itself
('ctime', TimestampProperty()),
('mtime', TimestampProperty()),
('atime', TimestampProperty()),
('contains_refs', ListProperty(ReferenceProperty(valid_types=['file', 'directory'], spec_version='2.1'))),
('extensions', ExtensionsProperty(spec_version='2.1', enclosing_type=_type)),
('spec_version', StringProperty(fixed='2.1')),
('object_marking_refs', ListProperty(ReferenceProperty(valid_types='marking-definition', spec_version='2.1'))),
('granular_markings', ListProperty(GranularMarking)),
('defanged', BooleanProperty(default=lambda: False)),
])
_id_contributing_properties = ["path"]
class DomainName(_Observable):
"""For more detailed information on this object's properties, see
`the STIX 2.1 specification <https://docs.oasis-open.org/cti/stix/v2.1/cs01/stix-v2.1-cs01.html#_i2zf5h7vnrd9>`__.
"""
_type = 'domain-name'
_properties = OrderedDict([
('type', TypeProperty(_type, spec_version='2.1')),
('id', IDProperty(_type, spec_version='2.1')),
('value', StringProperty(required=True)),
('resolves_to_refs', ListProperty(ReferenceProperty(valid_types=['ipv4-addr', 'ipv6-addr', 'domain-name'], spec_version='2.1'))),
('extensions', ExtensionsProperty(spec_version='2.1', enclosing_type=_type)),
('spec_version', StringProperty(fixed='2.1')),
('object_marking_refs', ListProperty(ReferenceProperty(valid_types='marking-definition', spec_version='2.1'))),
('granular_markings', ListProperty(GranularMarking)),
('defanged', BooleanProperty(default=lambda: False)),
])
_id_contributing_properties = ["value"]
class EmailAddress(_Observable):
"""For more detailed information on this object's properties, see
`the STIX 2.1 specification <https://docs.oasis-open.org/cti/stix/v2.1/cs01/stix-v2.1-cs01.html#_am7srelb9c14>`__.
"""
_type = 'email-addr'
_properties = OrderedDict([
('type', TypeProperty(_type, spec_version='2.1')),
('id', IDProperty(_type, spec_version='2.1')),
('value', StringProperty(required=True)),
('display_name', StringProperty()),
('belongs_to_ref', ReferenceProperty(valid_types='user-account', spec_version='2.1')),
('extensions', ExtensionsProperty(spec_version='2.1', enclosing_type=_type)),
('spec_version', StringProperty(fixed='2.1')),
('object_marking_refs', ListProperty(ReferenceProperty(valid_types='marking-definition', spec_version='2.1'))),
('granular_markings', ListProperty(GranularMarking)),
('defanged', BooleanProperty(default=lambda: False)),
])
_id_contributing_properties = ["value"]
class EmailMIMEComponent(_STIXBase21):
"""For more detailed information on this object's properties, see
`the STIX 2.1 specification <https://docs.oasis-open.org/cti/stix/v2.1/cs01/stix-v2.1-cs01.html#_kzv52qqc0xw1>`__.
"""
_properties = OrderedDict([
('body', StringProperty()),
('body_raw_ref', ReferenceProperty(valid_types=['artifact', 'file'], spec_version="2.1")),
('content_type', StringProperty()),
('content_disposition', StringProperty()),
])
def _check_object_constraints(self):
super(EmailMIMEComponent, self)._check_object_constraints()
self._check_at_least_one_property(['body', 'body_raw_ref'])
class EmailMessage(_Observable):
"""For more detailed information on this object's properties, see
`the STIX 2.1 specification <https://docs.oasis-open.org/cti/stix/v2.1/cs01/stix-v2.1-cs01.html#_loz634bn09om>`__.
"""
_type = 'email-message'
_properties = OrderedDict([
('type', TypeProperty(_type, spec_version='2.1')),
('id', IDProperty(_type, spec_version='2.1')),
('is_multipart', BooleanProperty(required=True)),
('date', TimestampProperty()),
('content_type', StringProperty()),
('from_ref', ReferenceProperty(valid_types='email-addr', spec_version='2.1')),
('sender_ref', ReferenceProperty(valid_types='email-addr', spec_version='2.1')),
('to_refs', ListProperty(ReferenceProperty(valid_types='email-addr', spec_version='2.1'))),
('cc_refs', ListProperty(ReferenceProperty(valid_types='email-addr', spec_version='2.1'))),
('bcc_refs', ListProperty(ReferenceProperty(valid_types='email-addr', spec_version='2.1'))),
('message_id', StringProperty()),
('subject', StringProperty()),
('received_lines', ListProperty(StringProperty)),
('additional_header_fields', DictionaryProperty(spec_version='2.1')),
('body', StringProperty()),
('body_multipart', ListProperty(EmbeddedObjectProperty(type=EmailMIMEComponent))),
('raw_email_ref', ReferenceProperty(valid_types='artifact', spec_version='2.1')),
('extensions', ExtensionsProperty(spec_version='2.1', enclosing_type=_type)),
('spec_version', StringProperty(fixed='2.1')),
('object_marking_refs', ListProperty(ReferenceProperty(valid_types='marking-definition', spec_version='2.1'))),
('granular_markings', ListProperty(GranularMarking)),
('defanged', BooleanProperty(default=lambda: False)),
])
_id_contributing_properties = ["from_ref", "subject", "body"]
def _check_object_constraints(self):
super(EmailMessage, self)._check_object_constraints()
self._check_properties_dependency(['is_multipart'], ['body_multipart'])
if self.get('is_multipart') is True and self.get('body'):
# 'body' MAY only be used if is_multipart is false.
raise DependentPropertiesError(self.__class__, [('is_multipart', 'body')])
class ArchiveExt(_Extension):
"""For more detailed information on this object's properties, see
`the STIX 2.1 specification <https://docs.oasis-open.org/cti/stix/v2.1/cs01/stix-v2.1-cs01.html#_mm25z9wuw4tr>`__.
"""
_type = 'archive-ext'
_properties = OrderedDict([
('contains_refs', ListProperty(ReferenceProperty(valid_types=['file', 'directory'], spec_version="2.1"), required=True)),
('comment', StringProperty()),
])
class AlternateDataStream(_STIXBase21):
"""For more detailed information on this object's properties, see
`the STIX 2.1 specification <https://docs.oasis-open.org/cti/stix/v2.1/cs01/stix-v2.1-cs01.html#_nbqgazg6fsma>`__.
"""
_properties = OrderedDict([
('name', StringProperty(required=True)),
('hashes', HashesProperty(spec_version='2.1')),
('size', IntegerProperty()),
])
class NTFSExt(_Extension):
"""For more detailed information on this object's properties, see
`the STIX 2.1 specification <https://docs.oasis-open.org/cti/stix/v2.1/cs01/stix-v2.1-cs01.html#_tb77nk1g3y6f>`__.
"""
_type = 'ntfs-ext'
_properties = OrderedDict([
('sid', StringProperty()),
('alternate_data_streams', ListProperty(EmbeddedObjectProperty(type=AlternateDataStream))),
])
class PDFExt(_Extension):
"""For more detailed information on this object's properties, see
`the STIX 2.1 specification <https://docs.oasis-open.org/cti/stix/v2.1/cs01/stix-v2.1-cs01.html#_30hzxqrmkg8w>`__.
"""
_type = 'pdf-ext'
_properties = OrderedDict([
('version', StringProperty()),
('is_optimized', BooleanProperty()),
('document_info_dict', DictionaryProperty(spec_version='2.1')),
('pdfid0', StringProperty()),
('pdfid1', StringProperty()),
])
class RasterImageExt(_Extension):
"""For more detailed information on this object's properties, see
`the STIX 2.1 specification <https://docs.oasis-open.org/cti/stix/v2.1/cs01/stix-v2.1-cs01.html#_20mnz0u5ppxr>`__.
"""
_type = 'raster-image-ext'
_properties = OrderedDict([
('image_height', IntegerProperty()),
('image_width', IntegerProperty()),
('bits_per_pixel', IntegerProperty()),
('exif_tags', DictionaryProperty(spec_version='2.1')),
])
class WindowsPEOptionalHeaderType(_STIXBase21):
"""For more detailed information on this object's properties, see
`the STIX 2.1 specification <https://docs.oasis-open.org/cti/stix/v2.1/cs01/stix-v2.1-cs01.html#_wyp5qdc2wugy>`__.
"""
_properties = OrderedDict([
('magic_hex', HexProperty()),
('major_linker_version', IntegerProperty()),
('minor_linker_version', IntegerProperty()),
('size_of_code', IntegerProperty(min=0)),
('size_of_initialized_data', IntegerProperty(min=0)),
('size_of_uninitialized_data', IntegerProperty(min=0)),
('address_of_entry_point', IntegerProperty()),
('base_of_code', IntegerProperty()),
('base_of_data', IntegerProperty()),
('image_base', IntegerProperty()),
('section_alignment', IntegerProperty()),
('file_alignment', IntegerProperty()),
('major_os_version', IntegerProperty()),
('minor_os_version', IntegerProperty()),
('major_image_version', IntegerProperty()),
('minor_image_version', IntegerProperty()),
('major_subsystem_version', IntegerProperty()),
('minor_subsystem_version', IntegerProperty()),
('win32_version_value_hex', HexProperty()),
('size_of_image', IntegerProperty(min=0)),
('size_of_headers', IntegerProperty(min=0)),
('checksum_hex', HexProperty()),
('subsystem_hex', HexProperty()),
('dll_characteristics_hex', HexProperty()),
('size_of_stack_reserve', IntegerProperty(min=0)),
('size_of_stack_commit', IntegerProperty(min=0)),
('size_of_heap_reserve', IntegerProperty()),
('size_of_heap_commit', IntegerProperty()),
('loader_flags_hex', HexProperty()),
('number_of_rva_and_sizes', IntegerProperty()),
('hashes', HashesProperty(spec_version='2.1')),
])
def _check_object_constraints(self):
super(WindowsPEOptionalHeaderType, self)._check_object_constraints()
self._check_at_least_one_property()
class WindowsPESection(_STIXBase21):
"""For more detailed information on this object's properties, see
`the STIX 2.1 specification <https://docs.oasis-open.org/cti/stix/v2.1/cs01/stix-v2.1-cs01.html#_wiqw87xsov3t>`__.
"""
_properties = OrderedDict([
('name', StringProperty(required=True)),
('size', IntegerProperty(min=0)),
('entropy', FloatProperty()),
('hashes', HashesProperty(spec_version='2.1')),
])
class WindowsPEBinaryExt(_Extension):
"""For more detailed information on this object's properties, see
`the STIX 2.1 specification <https://docs.oasis-open.org/cti/stix/v2.1/cs01/stix-v2.1-cs01.html#_5f9bgdmj91h5>`__.
"""
_type = 'windows-pebinary-ext'
_properties = OrderedDict([
('pe_type', StringProperty(required=True)), # open_vocab
('imphash', StringProperty()),
('machine_hex', HexProperty()),
('number_of_sections', IntegerProperty(min=0)),
('time_date_stamp', TimestampProperty(precision='second')),
('pointer_to_symbol_table_hex', HexProperty()),
('number_of_symbols', IntegerProperty(min=0)),
('size_of_optional_header', IntegerProperty(min=0)),
('characteristics_hex', HexProperty()),
('file_header_hashes', HashesProperty(spec_version='2.1')),
('optional_header', EmbeddedObjectProperty(type=WindowsPEOptionalHeaderType)),
('sections', ListProperty(EmbeddedObjectProperty(type=WindowsPESection))),
])
class File(_Observable):
"""For more detailed information on this object's properties, see
`the STIX 2.1 specification <https://docs.oasis-open.org/cti/stix/v2.1/cs01/stix-v2.1-cs01.html#_vq03pryd7u32>`__.
"""
_type = 'file'
_properties = OrderedDict([
('type', TypeProperty(_type, spec_version='2.1')),
('id', IDProperty(_type, spec_version='2.1')),
('hashes', HashesProperty(spec_version='2.1')),
('size', IntegerProperty(min=0)),
('name', StringProperty()),
('name_enc', StringProperty()),
('magic_number_hex', HexProperty()),
('mime_type', StringProperty()),
('ctime', TimestampProperty()),
('mtime', TimestampProperty()),
('atime', TimestampProperty()),
('parent_directory_ref', ReferenceProperty(valid_types='directory', spec_version='2.1')),
('contains_refs', ListProperty(ReferenceProperty(valid_types=["SCO"], spec_version='2.1'))),
('content_ref', ReferenceProperty(valid_types='artifact', spec_version='2.1')),
('extensions', ExtensionsProperty(spec_version='2.1', enclosing_type=_type)),
('spec_version', StringProperty(fixed='2.1')),
('object_marking_refs', ListProperty(ReferenceProperty(valid_types='marking-definition', spec_version='2.1'))),
('granular_markings', ListProperty(GranularMarking)),
('defanged', BooleanProperty(default=lambda: False)),
])
_id_contributing_properties = ["hashes", "name", "parent_directory_ref", "extensions"]
def _check_object_constraints(self):
super(File, self)._check_object_constraints()
self._check_at_least_one_property(['hashes', 'name'])
class IPv4Address(_Observable):
"""For more detailed information on this object's properties, see
`the STIX 2.1 specification <https://docs.oasis-open.org/cti/stix/v2.1/cs01/stix-v2.1-cs01.html#_ta83c412bfsc>`__.
"""
_type = 'ipv4-addr'
_properties = OrderedDict([
('type', TypeProperty(_type, spec_version='2.1')),
('id', IDProperty(_type, spec_version='2.1')),
('value', StringProperty(required=True)),
('resolves_to_refs', ListProperty(ReferenceProperty(valid_types='mac-addr', spec_version='2.1'))),
('belongs_to_refs', ListProperty(ReferenceProperty(valid_types='autonomous-system', spec_version='2.1'))),
('extensions', ExtensionsProperty(spec_version='2.1', enclosing_type=_type)),
('spec_version', StringProperty(fixed='2.1')),
('object_marking_refs', ListProperty(ReferenceProperty(valid_types='marking-definition', spec_version='2.1'))),
('granular_markings', ListProperty(GranularMarking)),
('defanged', BooleanProperty(default=lambda: False)),
])
_id_contributing_properties = ["value"]
class IPv6Address(_Observable):
"""For more detailed information on this object's properties, see
`the STIX 2.1 specification <https://docs.oasis-open.org/cti/stix/v2.1/cs01/stix-v2.1-cs01.html#_f76hsv2pvwwq>`__.
"""
_type = 'ipv6-addr'
_properties = OrderedDict([
('type', TypeProperty(_type, spec_version='2.1')),
('id', IDProperty(_type, spec_version='2.1')),
('value', StringProperty(required=True)),
('resolves_to_refs', ListProperty(ReferenceProperty(valid_types='mac-addr', spec_version='2.1'))),
('belongs_to_refs', ListProperty(ReferenceProperty(valid_types='autonomous-system', spec_version='2.1'))),
('extensions', ExtensionsProperty(spec_version='2.1', enclosing_type=_type)),
('spec_version', StringProperty(fixed='2.1')),
('object_marking_refs', ListProperty(ReferenceProperty(valid_types='marking-definition', spec_version='2.1'))),
('granular_markings', ListProperty(GranularMarking)),
('defanged', BooleanProperty(default=lambda: False)),
])
_id_contributing_properties = ["value"]
class MACAddress(_Observable):
"""For more detailed information on this object's properties, see
`the STIX 2.1 specification <https://docs.oasis-open.org/cti/stix/v2.1/cs01/stix-v2.1-cs01.html#_6lhrrdef8852>`__.
"""
_type = 'mac-addr'
_properties = OrderedDict([
('type', TypeProperty(_type, spec_version='2.1')),
('id', IDProperty(_type, spec_version='2.1')),
('value', StringProperty(required=True)),
('extensions', ExtensionsProperty(spec_version='2.1', enclosing_type=_type)),
('spec_version', StringProperty(fixed='2.1')),
('object_marking_refs', ListProperty(ReferenceProperty(valid_types='marking-definition', spec_version='2.1'))),
('granular_markings', ListProperty(GranularMarking)),
('defanged', BooleanProperty(default=lambda: False)),
])
_id_contributing_properties = ["value"]
class Mutex(_Observable):
"""For more detailed information on this object's properties, see
`the STIX 2.1 specification <https://docs.oasis-open.org/cti/stix/v2.1/cs01/stix-v2.1-cs01.html#_u65ia5eoc7cv>`__.
"""
_type = 'mutex'
_properties = OrderedDict([
('type', TypeProperty(_type, spec_version='2.1')),
('id', IDProperty(_type, spec_version='2.1')),
('name', StringProperty(required=True)),
('extensions', ExtensionsProperty(spec_version='2.1', enclosing_type=_type)),
('spec_version', StringProperty(fixed='2.1')),
('object_marking_refs', ListProperty(ReferenceProperty(valid_types='marking-definition', spec_version='2.1'))),
('granular_markings', ListProperty(GranularMarking)),
('defanged', BooleanProperty(default=lambda: False)),
])
_id_contributing_properties = ["name"]
class HTTPRequestExt(_Extension):
"""For more detailed information on this object's properties, see
`the STIX 2.1 specification <https://docs.oasis-open.org/cti/stix/v2.1/cs01/stix-v2.1-cs01.html#_60k6dn28qicj>`__.
"""
_type = 'http-request-ext'
_properties = OrderedDict([
('request_method', StringProperty(required=True)),
('request_value', StringProperty(required=True)),
('request_version', StringProperty()),
('request_header', DictionaryProperty(spec_version='2.1')),
('message_body_length', IntegerProperty()),
('message_body_data_ref', ReferenceProperty(valid_types='artifact', spec_version="2.1")),
])
class ICMPExt(_Extension):
# TODO: Add link
"""For more detailed information on this object's properties, see
`the STIX 2.1 specification <https://docs.oasis-open.org/cti/stix/v2.1/cs01/stix-v2.1-cs01.html#_3g6wds21zwzl>`__.
"""
_type = 'icmp-ext'
_properties = OrderedDict([
('icmp_type_hex', HexProperty(required=True)),
('icmp_code_hex', HexProperty(required=True)),
])
class SocketExt(_Extension):
"""For more detailed information on this object's properties, see
`the STIX 2.1 specification <https://docs.oasis-open.org/cti/stix/v2.1/cs01/stix-v2.1-cs01.html#_f54f1hripxsg>`__.
"""
_type = 'socket-ext'
_properties = OrderedDict([
(
'address_family', EnumProperty(
allowed=[
"AF_UNSPEC",
"AF_INET",
"AF_IPX",
"AF_APPLETALK",
"AF_NETBIOS",
"AF_INET6",
"AF_IRDA",
"AF_BTH",
], required=True,
),
),
('is_blocking', BooleanProperty()),
('is_listening', BooleanProperty()),
(
'protocol_family', EnumProperty(allowed=[
"PF_INET",
"PF_IPX",
"PF_APPLETALK",
"PF_INET6",
"PF_AX25",
"PF_NETROM",
]),
),
('options', DictionaryProperty(spec_version='2.1')),
(
'socket_type', EnumProperty(allowed=[
"SOCK_STREAM",
"SOCK_DGRAM",
"SOCK_RAW",
"SOCK_RDM",
"SOCK_SEQPACKET",
]),
),
('socket_descriptor', IntegerProperty(min=0)),
('socket_handle', IntegerProperty()),
])
def _check_object_constraints(self):
super(SocketExt, self)._check_object_constraints()
options = self.get('options')
if options is not None:
acceptable_prefixes = ["SO_", "ICMP_", "ICMP6_", "IP_", "IPV6_", "MCAST_", "TCP_", "IRLMP_"]
for key, val in options.items():
if key[:key.find('_') + 1] not in acceptable_prefixes:
raise ValueError("Incorrect options key")
if not isinstance(val, int):
raise ValueError("Options value must be an integer")
class TCPExt(_Extension):
"""For more detailed information on this object's properties, see
`the STIX 2.1 specification <https://docs.oasis-open.org/cti/stix/v2.1/cs01/stix-v2.1-cs01.html#_2z78x4m8ewcw>`__.
"""
_type = 'tcp-ext'
_properties = OrderedDict([
('src_flags_hex', HexProperty()),
('dst_flags_hex', HexProperty()),
])
class NetworkTraffic(_Observable):
"""For more detailed information on this object's properties, see
`the STIX 2.1 specification <https://docs.oasis-open.org/cti/stix/v2.1/cs01/stix-v2.1-cs01.html#_e5nyr5squmsd>`__.
"""
_type = 'network-traffic'
_properties = OrderedDict([
('type', TypeProperty(_type, spec_version='2.1')),
('id', IDProperty(_type, spec_version='2.1')),
('start', TimestampProperty()),
('end', TimestampProperty()),
('is_active', BooleanProperty()),
('src_ref', ReferenceProperty(valid_types=['ipv4-addr', 'ipv6-addr', 'mac-addr', 'domain-name'], spec_version='2.1')),
('dst_ref', ReferenceProperty(valid_types=['ipv4-addr', 'ipv6-addr', 'mac-addr', 'domain-name'], spec_version='2.1')),
('src_port', IntegerProperty(min=0, max=65535)),
('dst_port', IntegerProperty(min=0, max=65535)),
('protocols', ListProperty(StringProperty, required=True)),
('src_byte_count', IntegerProperty(min=0)),
('dst_byte_count', IntegerProperty(min=0)),
('src_packets', IntegerProperty(min=0)),
('dst_packets', IntegerProperty(min=0)),
('ipfix', DictionaryProperty(spec_version='2.1')),
('src_payload_ref', ReferenceProperty(valid_types='artifact', spec_version='2.1')),
('dst_payload_ref', ReferenceProperty(valid_types='artifact', spec_version='2.1')),
('encapsulates_refs', ListProperty(ReferenceProperty(valid_types='network-traffic', spec_version='2.1'))),
('encapsulated_by_ref', ReferenceProperty(valid_types='network-traffic', spec_version='2.1')),
('extensions', ExtensionsProperty(spec_version='2.1', enclosing_type=_type)),
('spec_version', StringProperty(fixed='2.1')),
('object_marking_refs', ListProperty(ReferenceProperty(valid_types='marking-definition', spec_version='2.1'))),
('granular_markings', ListProperty(GranularMarking)),
('defanged', BooleanProperty(default=lambda: False)),
])
_id_contributing_properties = ["start", "src_ref", "dst_ref", "src_port", "dst_port", "protocols"]
def _check_object_constraints(self):
super(NetworkTraffic, self)._check_object_constraints()
self._check_at_least_one_property(['src_ref', 'dst_ref'])
start = self.get('start')
end = self.get('end')
is_active = self.get('is_active')
if end and is_active is not False:
msg = "{0.id} 'is_active' must be False if 'end' is present"
raise ValueError(msg.format(self))
if end and is_active is True:
msg = "{0.id} if 'is_active' is True, 'end' must not be included"
raise ValueError(msg.format(self))
if start and end and end <= start:
msg = "{0.id} 'end' must be greater than 'start'"
raise ValueError(msg.format(self))
class WindowsProcessExt(_Extension):
"""For more detailed information on this object's properties, see
`the STIX 2.1 specification <https://docs.oasis-open.org/cti/stix/v2.1/cs01/stix-v2.1-cs01.html#_4wfs4ve800kf>`__.
"""
_type = 'windows-process-ext'
_properties = OrderedDict([
('aslr_enabled', BooleanProperty()),
('dep_enabled', BooleanProperty()),
('priority', StringProperty()),
('owner_sid', StringProperty()),
('window_title', StringProperty()),
('startup_info', DictionaryProperty(spec_version='2.1')),
(
'integrity_level', EnumProperty(allowed=[
"low",
"medium",
"high",
"system",
]),
),
])
class WindowsServiceExt(_Extension):
"""For more detailed information on this object's properties, see
`the STIX 2.1 specification <https://docs.oasis-open.org/cti/stix/v2.1/cs01/stix-v2.1-cs01.html#_s2rmoe7djlt>`__.
"""
_type = 'windows-service-ext'
_properties = OrderedDict([
('service_name', StringProperty()),
('descriptions', ListProperty(StringProperty)),
('display_name', StringProperty()),
('group_name', StringProperty()),
(
'start_type', EnumProperty(allowed=[
"SERVICE_AUTO_START",
"SERVICE_BOOT_START",
"SERVICE_DEMAND_START",
"SERVICE_DISABLED",
"SERVICE_SYSTEM_ALERT",
]),
),
('service_dll_refs', ListProperty(ReferenceProperty(valid_types='file', spec_version="2.1"))),
(
'service_type', EnumProperty(allowed=[
"SERVICE_KERNEL_DRIVER",
"SERVICE_FILE_SYSTEM_DRIVER",
"SERVICE_WIN32_OWN_PROCESS",
"SERVICE_WIN32_SHARE_PROCESS",
]),
),
(
'service_status', EnumProperty(allowed=[
"SERVICE_CONTINUE_PENDING",
"SERVICE_PAUSE_PENDING",
"SERVICE_PAUSED",
"SERVICE_RUNNING",
"SERVICE_START_PENDING",
"SERVICE_STOP_PENDING",
"SERVICE_STOPPED",
]),
),
])
class Process(_Observable):
"""For more detailed information on this object's properties, see
`the STIX 2.1 specification <https://docs.oasis-open.org/cti/stix/v2.1/cs01/stix-v2.1-cs01.html#_ur7snm473t1d>`__.
"""
_type = 'process'
_properties = OrderedDict([
('type', TypeProperty(_type, spec_version='2.1')),
('id', IDProperty(_type, spec_version='2.1')),
('is_hidden', BooleanProperty()),
('pid', IntegerProperty()),
# this is not the created timestamps of the object itself
('created_time', TimestampProperty()),
('cwd', StringProperty()),
('command_line', StringProperty()),
('environment_variables', DictionaryProperty(spec_version='2.1')),
('opened_connection_refs', ListProperty(ReferenceProperty(valid_types='network-traffic', spec_version='2.1'))),
('creator_user_ref', ReferenceProperty(valid_types='user-account', spec_version='2.1')),
('image_ref', ReferenceProperty(valid_types='file', spec_version='2.1')),
('parent_ref', ReferenceProperty(valid_types='process', spec_version='2.1')),
('child_refs', ListProperty(ReferenceProperty(valid_types='process', spec_version='2.1'))),
('extensions', ExtensionsProperty(spec_version='2.1', enclosing_type=_type)),
('spec_version', StringProperty(fixed='2.1')),
('object_marking_refs', ListProperty(ReferenceProperty(valid_types='marking-definition', spec_version='2.1'))),
('granular_markings', ListProperty(GranularMarking)),
('defanged', BooleanProperty(default=lambda: False)),
])
_id_contributing_properties = []
def _check_object_constraints(self):
# no need to check windows-service-ext, since it has a required property
super(Process, self)._check_object_constraints()
try:
self._check_at_least_one_property()
if 'windows-process-ext' in self.get('extensions', {}):
self.extensions['windows-process-ext']._check_at_least_one_property()
except AtLeastOnePropertyError as enclosing_exc:
if 'extensions' not in self:
raise enclosing_exc
else:
if 'windows-process-ext' in self.get('extensions', {}):
self.extensions['windows-process-ext']._check_at_least_one_property()
class Software(_Observable):
"""For more detailed information on this object's properties, see
`the STIX 2.1 specification <https://docs.oasis-open.org/cti/stix/v2.1/cs01/stix-v2.1-cs01.html#_jru33yeokrmh>`__.
"""
_type = 'software'
_properties = OrderedDict([
('type', TypeProperty(_type, spec_version='2.1')),
('id', IDProperty(_type, spec_version='2.1')),
('name', StringProperty(required=True)),
('cpe', StringProperty()),
('swid', StringProperty()),
('languages', ListProperty(StringProperty)),
('vendor', StringProperty()),
('version', StringProperty()),
('extensions', ExtensionsProperty(spec_version='2.1', enclosing_type=_type)),
('spec_version', StringProperty(fixed='2.1')),
('object_marking_refs', ListProperty(ReferenceProperty(valid_types='marking-definition', spec_version='2.1'))),
('granular_markings', ListProperty(GranularMarking)),
('defanged', BooleanProperty(default=lambda: False)),
])
_id_contributing_properties = ["name", "cpe", "swid", "vendor", "version"]
class URL(_Observable):
"""For more detailed information on this object's properties, see
`the STIX 2.1 specification <https://docs.oasis-open.org/cti/stix/v2.1/cs01/stix-v2.1-cs01.html#_6bsklda6vc0c>`__.
"""
_type = 'url'
_properties = OrderedDict([
('type', TypeProperty(_type, spec_version='2.1')),
('id', IDProperty(_type, spec_version='2.1')),
('value', StringProperty(required=True)),
('extensions', ExtensionsProperty(spec_version='2.1', enclosing_type=_type)),
('spec_version', StringProperty(fixed='2.1')),
('object_marking_refs', ListProperty(ReferenceProperty(valid_types='marking-definition', spec_version='2.1'))),
('granular_markings', ListProperty(GranularMarking)),
('defanged', BooleanProperty(default=lambda: False)),
])
_id_contributing_properties = ["value"]
class UNIXAccountExt(_Extension):
"""For more detailed information on this object's properties, see
`the STIX 2.1 specification <https://docs.oasis-open.org/cti/stix/v2.1/cs01/stix-v2.1-cs01.html#_z25gmwyz67kl>`__.
"""
_type = 'unix-account-ext'
_properties = OrderedDict([
('gid', IntegerProperty()),
('groups', ListProperty(StringProperty)),
('home_dir', StringProperty()),
('shell', StringProperty()),
])
class UserAccount(_Observable):
"""For more detailed information on this object's properties, see
`the STIX 2.1 specification <https://docs.oasis-open.org/cti/stix/v2.1/cs01/stix-v2.1-cs01.html#_hah33g4ntxnx>`__.
"""
_type = 'user-account'
_properties = OrderedDict([
('type', TypeProperty(_type, spec_version='2.1')),
('id', IDProperty(_type, spec_version='2.1')),
('user_id', StringProperty()),
('credential', StringProperty()),
('account_login', StringProperty()),
('account_type', StringProperty()), # open vocab
('display_name', StringProperty()),
('is_service_account', BooleanProperty()),
('is_privileged', BooleanProperty()),
('can_escalate_privs', BooleanProperty()),
('is_disabled', BooleanProperty()),
('account_created', TimestampProperty()),
('account_expires', TimestampProperty()),
('credential_last_changed', TimestampProperty()),
('account_first_login', TimestampProperty()),
('account_last_login', TimestampProperty()),
('extensions', ExtensionsProperty(spec_version='2.1', enclosing_type=_type)),
('spec_version', StringProperty(fixed='2.1')),
('object_marking_refs', ListProperty(ReferenceProperty(valid_types='marking-definition', spec_version='2.1'))),
('granular_markings', ListProperty(GranularMarking)),
('defanged', BooleanProperty(default=lambda: False)),
])
_id_contributing_properties = ["account_type", "user_id", "account_login"]
class WindowsRegistryValueType(_STIXBase21):
"""For more detailed information on this object's properties, see
`the STIX 2.1 specification <https://docs.oasis-open.org/cti/stix/v2.1/cs01/stix-v2.1-cs01.html#_6jiqabgqp2hp>`__.
"""
_type = 'windows-registry-value-type'
_properties = OrderedDict([
('name', StringProperty()),
('data', StringProperty()),
(
'data_type', EnumProperty(allowed=[
"REG_NONE",
"REG_SZ",
"REG_EXPAND_SZ",
"REG_BINARY",
"REG_DWORD",
"REG_DWORD_BIG_ENDIAN",
"REG_LINK",
"REG_MULTI_SZ",
"REG_RESOURCE_LIST",
"REG_FULL_RESOURCE_DESCRIPTION",
"REG_RESOURCE_REQUIREMENTS_LIST",
"REG_QWORD",
"REG_INVALID_TYPE",
]),
),
])
class WindowsRegistryKey(_Observable):
"""For more detailed information on this object's properties, see
`the STIX 2.1 specification <https://docs.oasis-open.org/cti/stix/v2.1/cs01/stix-v2.1-cs01.html#_bdim4of4dl37>`__.
"""
_type = 'windows-registry-key'
_properties = OrderedDict([
('type', TypeProperty(_type, spec_version='2.1')),
('id', IDProperty(_type, spec_version='2.1')),
('key', StringProperty()),
('values', ListProperty(EmbeddedObjectProperty(type=WindowsRegistryValueType))),
# this is not the modified timestamps of the object itself
('modified_time', TimestampProperty()),
('creator_user_ref', ReferenceProperty(valid_types='user-account', spec_version='2.1')),
('number_of_subkeys', IntegerProperty()),
('extensions', ExtensionsProperty(spec_version='2.1', enclosing_type=_type)),
('spec_version', StringProperty(fixed='2.1')),
('object_marking_refs', ListProperty(ReferenceProperty(valid_types='marking-definition', spec_version='2.1'))),
('granular_markings', ListProperty(GranularMarking)),
('defanged', BooleanProperty(default=lambda: False)),
])
_id_contributing_properties = ["key", "values"]
class X509V3ExtenstionsType(_STIXBase21):
"""For more detailed information on this object's properties, see
`the STIX 2.1 specification <https://docs.oasis-open.org/cti/stix/v2.1/cs01/stix-v2.1-cs01.html#_c1kt4dheb6vz>`__.
"""
_type = 'x509-v3-extensions-type'
_properties = OrderedDict([
('basic_constraints', StringProperty()),
('name_constraints', StringProperty()),
('policy_constraints', StringProperty()),
('key_usage', StringProperty()),
('extended_key_usage', StringProperty()),
('subject_key_identifier', StringProperty()),
('authority_key_identifier', StringProperty()),
('subject_alternative_name', StringProperty()),
('issuer_alternative_name', StringProperty()),
('subject_directory_attributes', StringProperty()),
('crl_distribution_points', StringProperty()),
('inhibit_any_policy', StringProperty()),
('private_key_usage_period_not_before', TimestampProperty()),
('private_key_usage_period_not_after', TimestampProperty()),
('certificate_policies', StringProperty()),
('policy_mappings', StringProperty()),
])
class X509Certificate(_Observable):
"""For more detailed information on this object's properties, see
`the STIX 2.1 specification <https://docs.oasis-open.org/cti/stix/v2.1/cs01/stix-v2.1-cs01.html#_g3kniyun8ykv>`__.
"""
_type = 'x509-certificate'
_properties = OrderedDict([
('type', TypeProperty(_type, spec_version='2.1')),
('id', IDProperty(_type, spec_version='2.1')),
('is_self_signed', BooleanProperty()),
('hashes', HashesProperty(spec_version='2.1')),
('version', StringProperty()),
('serial_number', StringProperty()),
('signature_algorithm', StringProperty()),
('issuer', StringProperty()),
('validity_not_before', TimestampProperty()),
('validity_not_after', TimestampProperty()),
('subject', StringProperty()),
('subject_public_key_algorithm', StringProperty()),
('subject_public_key_modulus', StringProperty()),
('subject_public_key_exponent', IntegerProperty()),
('x509_v3_extensions', EmbeddedObjectProperty(type=X509V3ExtenstionsType)),
('extensions', ExtensionsProperty(spec_version='2.1', enclosing_type=_type)),
('spec_version', StringProperty(fixed='2.1')),
('object_marking_refs', ListProperty(ReferenceProperty(valid_types='marking-definition', spec_version='2.1'))),
('granular_markings', ListProperty(GranularMarking)),
('defanged', BooleanProperty(default=lambda: False)),
])
_id_contributing_properties = ["hashes", "serial_number"]
def _check_object_constraints(self):
super(X509Certificate, self)._check_object_constraints()
att_list = [
'is_self_signed', 'hashes', 'version', 'serial_number',
'signature_algorithm', 'issuer', 'validity_not_before',
'validity_not_after', 'subject', 'subject_public_key_algorithm',
'subject_public_key_modulus', 'subject_public_key_exponent',
'x509_v3_extensions',
]
self._check_at_least_one_property(att_list)
def CustomObservable(type='x-custom-observable', properties=None, id_contrib_props=None):
"""Custom STIX Cyber Observable Object type decorator.
Example:
>>> from stix2.v21 import CustomObservable
>>> from stix2.properties import IntegerProperty, StringProperty
>>> @CustomObservable('x-custom-observable', [
... ('property1', StringProperty(required=True)),
... ('property2', IntegerProperty()),
... ])
... class MyNewObservableType():
... pass
"""
def wrapper(cls):
_properties = list(itertools.chain.from_iterable([
[('type', TypeProperty(type, spec_version='2.1'))],
[('id', IDProperty(type, spec_version='2.1'))],
properties,
[('extensions', ExtensionsProperty(spec_version='2.1', enclosing_type=type))],
]))
return _custom_observable_builder(cls, type, _properties, '2.1', _Observable, id_contrib_props)
return wrapper
def CustomExtension(observable=None, type='x-custom-observable-ext', properties=None):
"""Decorator for custom extensions to STIX Cyber Observables.
"""
def wrapper(cls):
return _custom_extension_builder(cls, observable, type, properties, '2.1', _Extension)
return wrapper