352 lines
12 KiB
Python
352 lines
12 KiB
Python
"""STIX 2.0 Cyber Observable Objects
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Embedded observable object types, such as Email MIME Component, which is
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embedded in Email Message objects, inherit from _STIXBase instead of Observable
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and do not have a '_type' attribute.
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"""
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from .base import _Observable, _STIXBase
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from .properties import (BinaryProperty, BooleanProperty, DictionaryProperty,
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EmbeddedObjectProperty, EnumProperty, HashesProperty,
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HexProperty, IntegerProperty, ListProperty,
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ObjectReferenceProperty, StringProperty,
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TimestampProperty, TypeProperty)
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class Artifact(_Observable):
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_type = 'artifact'
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_properties = {
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'type': TypeProperty(_type),
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'mime_type': StringProperty(),
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'payload_bin': BinaryProperty(),
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'url': StringProperty(),
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'hashes': HashesProperty(),
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}
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def _check_object_constaints(self):
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super(Artifact, self)._check_object_constaints()
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self._check_mutually_exclusive_properties(["payload_bin", "url"])
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self._check_properties_dependency(["hashes"], ["url"])
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class AutonomousSystem(_Observable):
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_type = 'autonomous-system'
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_properties = {
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'type': TypeProperty(_type),
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'number': IntegerProperty(),
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'name': StringProperty(),
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'rir': StringProperty(),
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}
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class Directory(_Observable):
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_type = 'directory'
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_properties = {
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'type': TypeProperty(_type),
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'path': StringProperty(required=True),
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'path_enc': StringProperty(),
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# these are not the created/modified timestamps of the object itself
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'created': TimestampProperty(),
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'modified': TimestampProperty(),
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'accessed': TimestampProperty(),
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'contains_refs': ListProperty(ObjectReferenceProperty),
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}
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class DomainName(_Observable):
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_type = 'domain-name'
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_properties = {
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'type': TypeProperty(_type),
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'value': StringProperty(required=True),
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'resolves_to_refs': ListProperty(ObjectReferenceProperty),
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}
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class EmailAddress(_Observable):
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_type = 'email-address'
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_properties = {
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'type': TypeProperty(_type),
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'value': StringProperty(required=True),
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'display_name': StringProperty(),
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'belongs_to_ref': ObjectReferenceProperty(),
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}
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class EmailMIMEComponent(_STIXBase):
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_properties = {
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'body': StringProperty(),
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'body_raw_ref': ObjectReferenceProperty(),
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'content_type': StringProperty(),
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'content_disposition': StringProperty(),
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}
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def _check_object_constaints(self):
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super(EmailMIMEComponent, self)._check_object_constaints()
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self._check_at_least_one_property(["body", "body_raw_ref"])
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class EmailMessage(_Observable):
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_type = 'email-message'
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_properties = {
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'type': TypeProperty(_type),
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'is_multipart': BooleanProperty(required=True),
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'date': TimestampProperty(),
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'content_type': StringProperty(),
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'from_ref': ObjectReferenceProperty(),
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'sender_ref': ObjectReferenceProperty(),
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'to_refs': ListProperty(ObjectReferenceProperty),
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'cc_refs': ListProperty(ObjectReferenceProperty),
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'bcc_refs': ListProperty(ObjectReferenceProperty),
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'subject': StringProperty(),
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'received_lines': ListProperty(StringProperty),
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'additional_header_fields': DictionaryProperty(),
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'body': StringProperty(),
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'body_multipart': ListProperty(EmbeddedObjectProperty(type=EmailMIMEComponent)),
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'raw_email_ref': ObjectReferenceProperty(),
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}
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def _check_object_constaints(self):
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super(EmailMessage, self)._check_object_constaints()
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self._check_properties_dependency(["is_multipart"], ["body_multipart"])
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# self._dependency(["is_multipart"], ["body"], [False])
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class File(_Observable):
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_type = 'file'
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_properties = {
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'type': TypeProperty(_type),
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# extensions
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'hashes': HashesProperty(),
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'size': IntegerProperty(),
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'name': StringProperty(),
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'name_enc': StringProperty(),
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'magic_number_hex': HexProperty(),
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'mime_type': StringProperty(),
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# these are not the created/modified timestamps of the object itself
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'created': TimestampProperty(),
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'modified': TimestampProperty(),
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'accessed': TimestampProperty(),
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'parent_directory_ref': ObjectReferenceProperty(),
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'is_encrypted': BooleanProperty(),
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'encryption_algorithm': StringProperty(),
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'decryption_key': StringProperty(),
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'contains_refs': ListProperty(ObjectReferenceProperty),
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'content_ref': ObjectReferenceProperty(),
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}
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def _check_object_constaints(self):
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super(File, self)._check_object_constaints()
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self._check_properties_dependency(["is_encrypted"], ["encryption_algorithm", "decryption_key"])
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self._check_at_least_one_property(["hashes", "name"])
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class IPv4Address(_Observable):
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_type = 'ipv4-addr'
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_properties = {
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'type': TypeProperty(_type),
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'value': StringProperty(required=True),
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'resolves_to_refs': ListProperty(ObjectReferenceProperty),
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'belongs_to_refs': ListProperty(ObjectReferenceProperty),
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}
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class IPv6Address(_Observable):
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_type = 'ipv6-addr'
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_properties = {
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'type': TypeProperty(_type),
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'value': StringProperty(required=True),
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'resolves_to_refs': ListProperty(ObjectReferenceProperty),
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'belongs_to_refs': ListProperty(ObjectReferenceProperty),
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}
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class MACAddress(_Observable):
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_type = 'mac-addr'
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_properties = {
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'type': TypeProperty(_type),
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'value': StringProperty(required=True),
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}
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class Mutex(_Observable):
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_type = 'mutex'
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_properties = {
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'type': TypeProperty(_type),
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'name': StringProperty(),
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}
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class NetworkTraffic(_Observable):
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_type = 'network-traffic'
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_properties = {
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'type': TypeProperty(_type),
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# extensions
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'start': TimestampProperty(),
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'end': TimestampProperty(),
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'is_active': BooleanProperty(),
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'src_ref': ObjectReferenceProperty(),
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'dst_ref': ObjectReferenceProperty(),
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'src_port': IntegerProperty(),
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'dst_port': IntegerProperty(),
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'protocols': ListProperty(StringProperty, required=True),
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'src_byte_count': IntegerProperty(),
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'dst_byte_count': IntegerProperty(),
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'src_packets': IntegerProperty(),
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'dst_packets': IntegerProperty(),
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'ipfix': DictionaryProperty(),
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'src_payload_ref': ObjectReferenceProperty(),
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'dst_payload_ref': ObjectReferenceProperty(),
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'encapsulates_refs': ListProperty(ObjectReferenceProperty),
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'encapsulates_by_ref': ObjectReferenceProperty(),
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}
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def _check_object_constaints(self):
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super(NetworkTraffic, self)._check_object_constaints()
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self._check_at_least_one_property(["src_ref", "dst_ref"])
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class Process(_Observable):
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_type = 'process'
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_properties = {
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'type': TypeProperty(_type),
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# extensions
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'is_hidden': BooleanProperty(),
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'pid': IntegerProperty(),
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'name': StringProperty(),
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# this is not the created timestamps of the object itself
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'created': TimestampProperty(),
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'cwd': StringProperty(),
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'arguments': ListProperty(StringProperty),
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'command_line': StringProperty(),
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'environment_variables': DictionaryProperty(),
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'opened_connection_refs': ListProperty(ObjectReferenceProperty),
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'creator_user_ref': ObjectReferenceProperty(),
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'binary_ref': ObjectReferenceProperty(),
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'parent_ref': ObjectReferenceProperty(),
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'child_refs': ListProperty(ObjectReferenceProperty),
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}
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class Software(_Observable):
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_type = 'software'
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_properties = {
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'type': TypeProperty(_type),
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'name': StringProperty(required=True),
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'cpe': StringProperty(),
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'languages': ListProperty(StringProperty),
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'vendor': StringProperty(),
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'version': StringProperty(),
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}
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class URL(_Observable):
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_type = 'url'
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_properties = {
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'type': TypeProperty(_type),
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'value': StringProperty(required=True),
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}
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class UserAccount(_Observable):
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_type = 'user-account'
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_properties = {
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'type': TypeProperty(_type),
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# extensions
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'user_id': StringProperty(required=True),
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'account_login': StringProperty(),
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'account_type': StringProperty(),
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'display_name': StringProperty(),
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'is_service_account': BooleanProperty(),
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'is_privileged': BooleanProperty(),
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'can_escalate_privs': BooleanProperty(),
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'is_disabled': BooleanProperty(),
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'account_created': TimestampProperty(),
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'account_expires': TimestampProperty(),
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'password_last_changed': TimestampProperty(),
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'account_first_login': TimestampProperty(),
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'account_last_login': TimestampProperty(),
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}
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class WindowsRegistryValueType(_STIXBase):
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_type = 'windows-registry-value-type'
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_properties = {
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'name': StringProperty(required=True),
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'data': StringProperty(),
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'data_type': EnumProperty([
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'REG_NONE',
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'REG_SZ',
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'REG_EXPAND_SZ',
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'REG_BINARY',
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'REG_DWORD',
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'REG_DWORD_BIG_ENDIAN',
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'REG_LINK',
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'REG_MULTI_SZ',
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'REG_RESOURCE_LIST',
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'REG_FULL_RESOURCE_DESCRIPTION',
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'REG_RESOURCE_REQUIREMENTS_LIST',
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'REG_QWORD',
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'REG_INVALID_TYPE',
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]),
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}
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class WindowsRegistryKey(_Observable):
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_type = 'windows-registry-key'
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_properties = {
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'type': TypeProperty(_type),
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'key': StringProperty(required=True),
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'values': ListProperty(EmbeddedObjectProperty(type=WindowsRegistryValueType)),
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# this is not the modified timestamps of the object itself
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'modified': TimestampProperty(),
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'creator_user_ref': ObjectReferenceProperty(),
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'number_of_subkeys': IntegerProperty(),
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}
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@property
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def values(self):
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# Needed because 'values' is a property on collections.Mapping objects
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return self._inner['values']
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class X509V3ExtenstionsType(_STIXBase):
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_type = 'x509-v3-extensions-type'
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_properties = {
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'basic_constraints': StringProperty(),
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'name_constraints': StringProperty(),
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'policy_constraints': StringProperty(),
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'key_usage': StringProperty(),
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'extended_key_usage': StringProperty(),
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'subject_key_identifier': StringProperty(),
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'authority_key_identifier': StringProperty(),
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'subject_alternative_name': StringProperty(),
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'issuer_alternative_name': StringProperty(),
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'subject_directory_attributes': StringProperty(),
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'crl_distribution_points': StringProperty(),
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'inhibit_any_policy': StringProperty(),
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'private_key_usage_period_not_before': TimestampProperty(),
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'private_key_usage_period_not_after': TimestampProperty(),
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'certificate_policies': StringProperty(),
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'policy_mappings': StringProperty(),
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}
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class X509Certificate(_Observable):
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_type = 'x509-certificate'
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_properties = {
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'type': TypeProperty(_type),
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'is_self_signed': BooleanProperty(),
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'hashes': HashesProperty(),
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'version': StringProperty(),
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'serial_number': StringProperty(),
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'signature_algorithm': StringProperty(),
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'issuer': StringProperty(),
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'validity_not_before': TimestampProperty(),
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'validity_not_after': TimestampProperty(),
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'subject': StringProperty(),
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'subject_public_key_algorithm': StringProperty(),
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'subject_public_key_modulus': StringProperty(),
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'subject_public_key_exponent': IntegerProperty(),
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'x509_v3_extensions': EmbeddedObjectProperty(type=X509V3ExtenstionsType),
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}
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