603 lines
21 KiB
Python
603 lines
21 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 .exceptions import AtLeastOnePropertyError
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from .properties import (BinaryProperty, BooleanProperty, DictionaryProperty,
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EmbeddedObjectProperty, EnumProperty,
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ExtensionsProperty, FloatProperty, 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_constraints(self):
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super(Artifact, self)._check_object_constraints()
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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(valid_types=['file', 'directory'])),
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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(valid_types=['ipv4-addr', 'ipv6-addr', 'domain-name'])),
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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(valid_types='user-account'),
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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(valid_types=['artifact', 'file']),
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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_constraints(self):
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super(EmailMIMEComponent, self)._check_object_constraints()
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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(valid_types='email-addr'),
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'sender_ref': ObjectReferenceProperty(valid_types='email-addr'),
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'to_refs': ListProperty(ObjectReferenceProperty(valid_types='email-addr')),
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'cc_refs': ListProperty(ObjectReferenceProperty(valid_types='email-addr')),
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'bcc_refs': ListProperty(ObjectReferenceProperty(valid_types='email-addr')),
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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(valid_types='artifact'),
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}
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def _check_object_constraints(self):
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super(EmailMessage, self)._check_object_constraints()
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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 ArchiveExt(_STIXBase):
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_properties = {
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'contains_refs': ListProperty(ObjectReferenceProperty(valid_types='file'), required=True),
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'version': StringProperty(),
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'comment': StringProperty(),
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}
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class AlternateDataStream(_STIXBase):
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_properties = {
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'name': StringProperty(required=True),
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'hashes': HashesProperty(),
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'size': IntegerProperty(),
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}
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class NTFSExt(_STIXBase):
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_properties = {
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'sid': StringProperty(),
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'alternate_data_streams': ListProperty(EmbeddedObjectProperty(type=AlternateDataStream)),
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}
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def _check_object_constraints(self):
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super(NTFSExt, self)._check_object_constraints()
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self._check_at_least_one_property()
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class PDFExt(_STIXBase):
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_properties = {
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'version': StringProperty(),
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'is_optimized': BooleanProperty(),
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'document_info_dict': DictionaryProperty(),
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'pdfid0': StringProperty(),
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'pdfid1': StringProperty(),
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}
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def _check_object_constraints(self):
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super(PDFExt, self)._check_object_constraints()
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self._check_at_least_one_property()
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class RasterImageExt(_STIXBase):
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_properties = {
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'image_height': IntegerProperty(),
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'image_weight': IntegerProperty(),
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'bits_per_pixel': IntegerProperty(),
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'image_compression_algorithm': StringProperty(),
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'exif_tags': DictionaryProperty(),
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}
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def _check_object_constraints(self):
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super(RasterImageExt, self)._check_object_constraints()
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self._check_at_least_one_property()
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class WindowsPEOptionalHeaderType(_STIXBase):
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_properties = {
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'magic_hex': HexProperty(),
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'major_linker_version': IntegerProperty(),
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'minor_linker_version': IntegerProperty(),
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'size_of_code': IntegerProperty(),
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'size_of_initialized_data': IntegerProperty(),
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'size_of_uninitialized_data': IntegerProperty(),
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'address_of_entry_point': IntegerProperty(),
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'base_of_code': IntegerProperty(),
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'base_of_data': IntegerProperty(),
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'image_base': IntegerProperty(),
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'section_alignment': IntegerProperty(),
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'file_alignment': IntegerProperty(),
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'major_os_version': IntegerProperty(),
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'minor_os_version': IntegerProperty(),
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'major_image_version': IntegerProperty(),
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'minor_image_version': IntegerProperty(),
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'major_subsystem_version': IntegerProperty(),
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'minor_subsystem_version': IntegerProperty(),
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'win32_version_value_hex': HexProperty(),
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'size_of_image': IntegerProperty(),
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'size_of_headers': IntegerProperty(),
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'checksum_hex': HexProperty(),
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'subsystem_hex': HexProperty(),
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'dll_characteristics_hex': HexProperty(),
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'size_of_stack_reserve': IntegerProperty(),
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'size_of_stack_commit': IntegerProperty(),
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'size_of_heap_reserve': IntegerProperty(),
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'size_of_heap_commit': IntegerProperty(),
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'loader_flags_hex': HexProperty(),
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'number_of_rva_and_sizes': IntegerProperty(),
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'hashes': HashesProperty(),
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}
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def _check_object_constraints(self):
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super(WindowsPEOptionalHeaderType, self)._check_object_constraints()
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self._check_at_least_one_property()
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class WindowsPESection(_STIXBase):
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_properties = {
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'name': StringProperty(required=True),
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'size': IntegerProperty(),
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'entropy': FloatProperty(),
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'hashes': HashesProperty(),
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}
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class WindowsPEBinaryExt(_STIXBase):
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_properties = {
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'pe_type': StringProperty(required=True), # open_vocab
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'imphash': StringProperty(),
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'machine_hex': HexProperty(),
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'number_of_sections': IntegerProperty(),
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'time_date_stamp': TimestampProperty(),
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'pointer_to_symbol_table_hex': HexProperty(),
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'number_of_symbols': IntegerProperty(),
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'size_of_optional_header': IntegerProperty(),
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'characteristics_hex': HexProperty(),
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'file_header_hashes': HashesProperty(),
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'optional_header': EmbeddedObjectProperty(type=WindowsPEOptionalHeaderType),
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'sections': ListProperty(EmbeddedObjectProperty(type=WindowsPESection)),
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}
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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': ExtensionsProperty(enclosing_type=_type),
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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(valid_types='directory'),
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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(valid_types='artifact'),
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}
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def _check_object_constraints(self):
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super(File, self)._check_object_constraints()
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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(valid_types='mac-addr')),
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'belongs_to_refs': ListProperty(ObjectReferenceProperty(valid_types='autonomous-system')),
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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(valid_types='mac-addr')),
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'belongs_to_refs': ListProperty(ObjectReferenceProperty(valid_types='autonomous-system')),
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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 HTTPRequestExt(_STIXBase):
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_properties = {
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'request_method': StringProperty(required=True),
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'request_value': StringProperty(required=True),
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'request_version': StringProperty(),
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'request_header': DictionaryProperty(),
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'message_body_length': IntegerProperty(),
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'message_body_data_ref': ObjectReferenceProperty(valid_types='artifact'),
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}
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class ICMPExt(_STIXBase):
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_properties = {
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'icmp_type_hex': HexProperty(required=True),
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'icmp_code_hex': HexProperty(required=True),
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}
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class SocketExt(_STIXBase):
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_properties = {
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'address_family': EnumProperty([
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"AF_UNSPEC",
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"AF_INET",
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"AF_IPX",
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"AF_APPLETALK",
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"AF_NETBIOS",
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"AF_INET6",
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"AF_IRDA",
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"AF_BTH",
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], required=True),
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'is_blocking': BooleanProperty(),
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'is_listening': BooleanProperty(),
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'protocol_family': EnumProperty([
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"PF_INET",
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"PF_IPX",
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"PF_APPLETALK",
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"PF_INET6",
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"PF_AX25",
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"PF_NETROM"
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]),
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'options': DictionaryProperty(),
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'socket_type': EnumProperty([
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"SOCK_STREAM",
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"SOCK_DGRAM",
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"SOCK_RAW",
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"SOCK_RDM",
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"SOCK_SEQPACKET",
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]),
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}
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class TCPExt(_STIXBase):
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_properties = {
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'src_flags_hex': HexProperty(),
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'dst_flags_hex': HexProperty(),
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}
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def _check_object_constraints(self):
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super(TCPExt, self)._check_object_constraints()
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self._check_at_least_one_property()
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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': ExtensionsProperty(enclosing_type=_type),
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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(valid_types=['ipv4-addr', 'ipv6-addr', 'mac-addr', 'domain-name']),
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'dst_ref': ObjectReferenceProperty(valid_types=['ipv4-addr', 'ipv6-addr', 'mac-addr', 'domain-name']),
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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(valid_types='artifact'),
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'dst_payload_ref': ObjectReferenceProperty(valid_types='artifact'),
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'encapsulates_refs': ListProperty(ObjectReferenceProperty(valid_types='network-traffic')),
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'encapsulates_by_ref': ObjectReferenceProperty(valid_types='network-traffic'),
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}
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def _check_object_constraints(self):
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super(NetworkTraffic, self)._check_object_constraints()
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self._check_at_least_one_property(["src_ref", "dst_ref"])
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class WindowsProcessExt(_STIXBase):
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_properties = {
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'aslr_enabled': BooleanProperty(),
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'dep_enabled': BooleanProperty(),
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'priority': StringProperty(),
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'owner_sid': StringProperty(),
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'window_title': StringProperty(),
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'startup_info': DictionaryProperty(),
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}
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class WindowsServiceExt(_STIXBase):
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_properties = {
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'service_name': StringProperty(required=True),
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'descriptions': ListProperty(StringProperty),
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'display_name': StringProperty(),
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'group_name': StringProperty(),
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'start_type': EnumProperty([
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"SERVICE_AUTO_START",
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"SERVICE_BOOT_START",
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"SERVICE_DEMAND_START",
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"SERVICE_DISABLED",
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"SERVICE_SYSTEM_ALERT",
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]),
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'service_dll_refs': ListProperty(ObjectReferenceProperty(valid_types='file')),
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'service_type': EnumProperty([
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"SERVICE_KERNEL_DRIVER",
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"SERVICE_FILE_SYSTEM_DRIVER",
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"SERVICE_WIN32_OWN_PROCESS",
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"SERVICE_WIN32_SHARE_PROCESS",
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]),
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'service_status': EnumProperty([
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"SERVICE_CONTINUE_PENDING",
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"SERVICE_PAUSE_PENDING",
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"SERVICE_PAUSED",
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"SERVICE_RUNNING",
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"SERVICE_START_PENDING",
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"SERVICE_STOP_PENDING",
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"SERVICE_STOPPED",
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]),
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}
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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': ExtensionsProperty(enclosing_type=_type),
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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(valid_types='network-traffic')),
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'creator_user_ref': ObjectReferenceProperty(valid_types='user-account'),
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'binary_ref': ObjectReferenceProperty(valid_types='file'),
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'parent_ref': ObjectReferenceProperty(valid_types='process'),
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'child_refs': ListProperty(ObjectReferenceProperty('process')),
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}
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def _check_object_constraints(self):
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# no need to check windows-service-ext, since it has a required property
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super(Process, self)._check_object_constraints()
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try:
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self._check_at_least_one_property()
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if self.extensions and "windows-process-ext" in self.extensions:
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self.extensions["windows-process-ext"]._check_at_least_one_property()
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except AtLeastOnePropertyError as enclosing_exc:
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if not self.extensions:
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raise enclosing_exc
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else:
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if "windows-process-ext" in self.extensions:
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self.extensions["windows-process-ext"]._check_at_least_one_property()
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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 UNIXAccountExt(_STIXBase):
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_properties = {
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'gid': IntegerProperty(),
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'groups': ListProperty(StringProperty),
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'home_dir': StringProperty(),
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'shell': StringProperty(),
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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': ExtensionsProperty(enclosing_type=_type),
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'user_id': StringProperty(required=True),
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'account_login': StringProperty(),
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'account_type': StringProperty(), # open vocab
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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):
|
|
_type = 'windows-registry-value-type'
|
|
_properties = {
|
|
'name': StringProperty(required=True),
|
|
'data': StringProperty(),
|
|
'data_type': EnumProperty([
|
|
'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):
|
|
_type = 'windows-registry-key'
|
|
_properties = {
|
|
'type': TypeProperty(_type),
|
|
'key': StringProperty(required=True),
|
|
'values': ListProperty(EmbeddedObjectProperty(type=WindowsRegistryValueType)),
|
|
# this is not the modified timestamps of the object itself
|
|
'modified': TimestampProperty(),
|
|
'creator_user_ref': ObjectReferenceProperty(valid_types='user-account'),
|
|
'number_of_subkeys': IntegerProperty(),
|
|
}
|
|
|
|
@property
|
|
def values(self):
|
|
# Needed because 'values' is a property on collections.Mapping objects
|
|
return self._inner['values']
|
|
|
|
|
|
class X509V3ExtenstionsType(_STIXBase):
|
|
_type = 'x509-v3-extensions-type'
|
|
_properties = {
|
|
'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):
|
|
_type = 'x509-certificate'
|
|
_properties = {
|
|
'type': TypeProperty(_type),
|
|
'is_self_signed': BooleanProperty(),
|
|
'hashes': HashesProperty(),
|
|
'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),
|
|
}
|