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PyMISP
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PyMISP/pymisp/mispevent.py

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# -*- coding: utf-8 -*-
from datetime import timezone, datetime, date
import json
import os
import base64
import sys
from io import BytesIO, IOBase
from zipfile import ZipFile
import uuid
from collections import defaultdict
import logging
import hashlib
from pathlib import Path
from typing import List, Optional, Union, IO, Dict, Any
from .abstract import AbstractMISP, MISPTag
from .exceptions import UnknownMISPObjectTemplate, InvalidMISPObject, PyMISPError, NewEventError, NewAttributeError
logger = logging.getLogger('pymisp')
try:
from dateutil.parser import parse
except ImportError:
logger.exception("Cannot import dateutil")
try:
import jsonschema # type: ignore
except ImportError:
logger.exception("Cannot import jsonschema")
try:
# pyme renamed to gpg the 2016-10-28
import gpg # type: ignore
from gpg.constants.sig import mode # type: ignore
has_pyme = True
except ImportError:
try:
# pyme renamed to gpg the 2016-10-28
import pyme as gpg # type: ignore
from pyme.constants.sig import mode # type: ignore
has_pyme = True
except ImportError:
has_pyme = False
def _make_datetime(value) -> datetime:
if isinstance(value, (int, float)):
# Timestamp
value = datetime.fromtimestamp(value)
elif isinstance(value, str):
if sys.version_info >= (3, 7):
try:
# faster
value = datetime.fromisoformat(value)
except Exception:
value = parse(value)
else:
try:
# faster
if '+' in value or value.find('-', 10) > -1: # date contains `-` char
value = datetime.strptime(value, "%Y-%m-%dT%H:%M:%S.%f%z")
elif '.' in value:
value = datetime.strptime(value, "%Y-%m-%dT%H:%M:%S.%f")
elif 'T' in value:
value = datetime.strptime(value, "%Y-%m-%dT%H:%M:%S")
else:
value = datetime.strptime(value, "%Y-%m-%d")
except Exception:
value = parse(value)
elif isinstance(value, datetime):
pass
elif isinstance(value, date): # NOTE: date has to be *after* datetime, or it will be overwritten
value = datetime.combine(value, datetime.min.time())
else:
raise PyMISPError(f'Invalid format for {value}: {type(value)}.')
if not value.tzinfo:
# set localtimezone if not present
value = value.astimezone()
return value
def make_bool(value: Optional[Union[bool, int, str, dict, list]]) -> bool:
if isinstance(value, bool):
return value
if isinstance(value, int):
return bool(value)
if not value: # None, 0, '', {}, []
return False
if isinstance(value, str):
if value == '0':
return False
return True
else:
raise PyMISPError('Unable to convert {} to a boolean.'.format(value))
class MISPOrganisation(AbstractMISP):
_fields_for_feed: set = {'name', 'uuid'}
def __init__(self):
super().__init__()
self.id: int
def from_dict(self, **kwargs):
if 'Organisation' in kwargs:
kwargs = kwargs['Organisation']
super(MISPOrganisation, self).from_dict(**kwargs)
class MISPSharingGroup(AbstractMISP):
def from_dict(self, **kwargs):
if 'SharingGroup' in kwargs:
kwargs = kwargs['SharingGroup']
super().from_dict(**kwargs)
class MISPShadowAttribute(AbstractMISP):
def __init__(self):
super().__init__()
self.type: str
self.value: str
def from_dict(self, **kwargs):
if 'ShadowAttribute' in kwargs:
kwargs = kwargs['ShadowAttribute']
super().from_dict(**kwargs)
def __repr__(self) -> str:
if hasattr(self, 'value'):
return f'<{self.__class__.__name__}(type={self.type}, value={self.value})'
return f'<{self.__class__.__name__}(NotInitialized)'
class MISPSighting(AbstractMISP):
def __init__(self):
super().__init__()
self.id: int
self.value: str
def from_dict(self, **kwargs):
"""Initialize the MISPSighting from a dictionary
:value: Value of the attribute the sighting is related too. Pushing this object
will update the sighting count of each attriutes with thifs value on the instance
:uuid: UUID of the attribute to update
:id: ID of the attriute to update
:source: Source of the sighting
:type: Type of the sighting
:timestamp: Timestamp associated to the sighting
"""
if 'Sighting' in kwargs:
kwargs = kwargs['Sighting']
super(MISPSighting, self).from_dict(**kwargs)
def __repr__(self) -> str:
if hasattr(self, 'value'):
return '<{self.__class__.__name__}(value={self.value})'.format(self=self)
if hasattr(self, 'id'):
return '<{self.__class__.__name__}(id={self.id})'.format(self=self)
if hasattr(self, 'uuid'):
return '<{self.__class__.__name__}(uuid={self.uuid})'.format(self=self)
return '<{self.__class__.__name__}(NotInitialized)'.format(self=self)
class MISPAttribute(AbstractMISP):
_fields_for_feed: set = {'uuid', 'value', 'category', 'type', 'comment', 'data', 'deleted',
'timestamp', 'to_ids', 'disable_correlation', 'first_seen', 'last_seen'}
def __init__(self, describe_types: Optional[Dict]=None, strict: bool=False):
"""Represents an Attribute
:describe_type: Use it is you want to overwrite the defualt describeTypes.json file (you don't)
:strict: If false, fallback to sane defaults for the attribute type if the ones passed by the user are incorrect
"""
super().__init__()
if describe_types:
self.describe_types: Dict[str, Any] = describe_types
self.__categories: List[str] = self.describe_types['categories']
self.__category_type_mapping: Dict[str, List[str]] = self.describe_types['category_type_mappings']
self.__sane_default: Dict[str, Dict[str, Union[str, int]]] = self.describe_types['sane_defaults']
self.__strict: bool = strict
self.data: Optional[BytesIO] = None
self.first_seen: datetime
self.last_seen: datetime
self.uuid: str = str(uuid.uuid4())
self.ShadowAttribute: List[MISPShadowAttribute] = []
self.SharingGroup: MISPSharingGroup
self.Sighting: List[MISPSighting] = []
self.Tag: List[MISPTag] = []
# For search
self.Event: MISPEvent
self.RelatedAttribute: List[MISPAttribute]
def add_tag(self, tag: Optional[Union[str, MISPTag, Dict]]=None, **kwargs) -> MISPTag:
return super()._add_tag(tag, **kwargs)
@property
def tags(self) -> List[MISPTag]:
"""Returns a lost of tags associated to this Attribute"""
return self.Tag
@tags.setter
def tags(self, tags: List[MISPTag]):
"""Set a list of prepared MISPTag."""
super()._set_tags(tags)
def _prepare_data(self, data: Optional[Union[Path, str, bytes, BytesIO]]):
if not data:
super().__setattr__('data', None)
return
if isinstance(data, BytesIO):
super().__setattr__('data', data)
elif isinstance(data, Path):
with data.open('rb') as f_temp:
super().__setattr__('data', BytesIO(f_temp.read()))
elif isinstance(data, (str, bytes)):
super().__setattr__('data', BytesIO(base64.b64decode(data)))
else:
raise PyMISPError(f'Invalid type ({type(data)}) for the data key: {data}')
if self.type == 'malware-sample':
try:
# Ignore type, if data is None -> exception
with ZipFile(self.data) as f: # type: ignore
if not self.__is_misp_encrypted_file(f):
raise PyMISPError('Not an existing malware sample')
for name in f.namelist():
if name.endswith('.filename.txt'):
with f.open(name, pwd=b'infected') as unpacked:
self.malware_filename = unpacked.read().decode().strip()
else:
with f.open(name, pwd=b'infected') as unpacked:
self._malware_binary = BytesIO(unpacked.read())
except Exception:
# not a encrypted zip file, assuming it is a new malware sample
self._prepare_new_malware_sample()
def __setattr__(self, name: str, value: Any):
if name in ['first_seen', 'last_seen']:
_datetime = _make_datetime(value)
if name == 'last_seen' and hasattr(self, 'first_seen') and self.first_seen > _datetime:
raise PyMISPError('last_seen ({value}) has to be after first_seen ({self.first_seen})')
if name == 'first_seen' and hasattr(self, 'last_seen') and self.last_seen < _datetime:
raise PyMISPError('first_seen ({value}) has to be before last_seen ({self.last_seen})')
super().__setattr__(name, _datetime)
elif name == 'data':
self._prepare_data(value)
else:
super().__setattr__(name, value)
def hash_values(self, algorithm: str='sha512') -> List[str]:
"""Compute the hash of every values for fast lookups"""
if algorithm not in hashlib.algorithms_available:
raise PyMISPError('The algorithm {} is not available for hashing.'.format(algorithm))
if '|' in self.type or self.type == 'malware-sample':
hashes = []
for v in self.value.split('|'):
h = hashlib.new(algorithm)
h.update(v.encode("utf-8"))
hashes.append(h.hexdigest())
return hashes
else:
h = hashlib.new(algorithm)
to_encode = self.value
if not isinstance(to_encode, str):
to_encode = str(to_encode)
h.update(to_encode.encode("utf-8"))
return [h.hexdigest()]
def _set_default(self):
if not hasattr(self, 'comment'):
self.comment = ''
if not hasattr(self, 'timestamp'):
self.timestamp = datetime.timestamp(datetime.now())
def _to_feed(self) -> Dict:
to_return = super()._to_feed()
if self.data:
to_return['data'] = base64.b64encode(self.data.getvalue()).decode()
if self.tags:
to_return['Tag'] = list(filter(None, [tag._to_feed() for tag in self.tags]))
return to_return
@property
def known_types(self) -> List[str]:
"""Returns a list of all the known MISP attributes types"""
return self.describe_types['types']
@property
def malware_binary(self) -> Optional[BytesIO]:
"""Returns a BytesIO of the malware (if the attribute has one, obvs)."""
if hasattr(self, '_malware_binary'):
return self._malware_binary
return None
@property
def shadow_attributes(self) -> List[MISPShadowAttribute]:
return self.ShadowAttribute
@shadow_attributes.setter
def shadow_attributes(self, shadow_attributes: List[MISPShadowAttribute]):
"""Set a list of prepared MISPShadowAttribute."""
if all(isinstance(x, MISPShadowAttribute) for x in shadow_attributes):
self.ShadowAttribute = shadow_attributes
else:
raise PyMISPError('All the attributes have to be of type MISPShadowAttribute.')
@property
def sightings(self) -> List[MISPSighting]:
return self.Sighting
@sightings.setter
def sightings(self, sightings: List[MISPSighting]):
"""Set a list of prepared MISPShadowAttribute."""
if all(isinstance(x, MISPSighting) for x in sightings):
self.Sighting = sightings
else:
raise PyMISPError('All the attributes have to be of type MISPSighting.')
def delete(self):
"""Mark the attribute as deleted (soft delete)"""
self.deleted = True
def add_proposal(self, shadow_attribute=None, **kwargs) -> MISPShadowAttribute:
"""Alias for add_shadow_attribute"""
return self.add_shadow_attribute(shadow_attribute, **kwargs)
def add_shadow_attribute(self, shadow_attribute: Optional[Union[MISPShadowAttribute, Dict]]=None, **kwargs) -> MISPShadowAttribute:
"""Add a shadow attribute to the attribute (by name or a MISPShadowAttribute object)"""
if isinstance(shadow_attribute, MISPShadowAttribute):
misp_shadow_attribute = shadow_attribute
elif isinstance(shadow_attribute, dict):
misp_shadow_attribute = MISPShadowAttribute()
misp_shadow_attribute.from_dict(**shadow_attribute)
elif kwargs:
misp_shadow_attribute = MISPShadowAttribute()
misp_shadow_attribute.from_dict(**kwargs)
else:
raise PyMISPError("The shadow_attribute is in an invalid format (can be either string, MISPShadowAttribute, or an expanded dict): {}".format(shadow_attribute))
self.shadow_attributes.append(misp_shadow_attribute)
self.edited = True
return misp_shadow_attribute
def add_sighting(self, sighting: Optional[Union[MISPSighting, dict]]=None, **kwargs) -> MISPSighting:
"""Add a sighting to the attribute (by name or a MISPSighting object)"""
if isinstance(sighting, MISPSighting):
misp_sighting = sighting
elif isinstance(sighting, dict):
misp_sighting = MISPSighting()
misp_sighting.from_dict(**sighting)
elif kwargs:
misp_sighting = MISPSighting()
misp_sighting.from_dict(**kwargs)
else:
raise PyMISPError("The sighting is in an invalid format (can be either string, MISPShadowAttribute, or an expanded dict): {}".format(sighting))
self.sightings.append(misp_sighting)
self.edited = True
return misp_sighting
def from_dict(self, **kwargs):
if 'Attribute' in kwargs:
kwargs = kwargs['Attribute']
if kwargs.get('type') and kwargs.get('category'):
if kwargs['type'] not in self.__category_type_mapping[kwargs['category']]:
if self.__strict:
raise NewAttributeError('{} and {} is an invalid combination, type for this category has to be in {}'.format(
kwargs.get('type'), kwargs.get('category'), (', '.join(self.__category_type_mapping[kwargs['category']]))))
else:
kwargs.pop('category', None)
self.type = kwargs.pop('type', None) # Required
if self.type is None:
raise NewAttributeError('The type of the attribute is required.')
if self.type not in self.known_types:
raise NewAttributeError('{} is invalid, type has to be in {}'.format(self.type, (', '.join(self.known_types))))
type_defaults = self.__sane_default[self.type]
self.value = kwargs.pop('value', None)
if self.value is None:
raise NewAttributeError('The value of the attribute is required.')
if self.type == 'datetime' and isinstance(self.value, str):
try:
# Faster
if sys.version_info >= (3, 7):
self.value = datetime.fromisoformat(self.value)
else:
if '+' in self.value or '-' in self.value:
self.value = datetime.strptime(self.value, "%Y-%m-%dT%H:%M:%S.%f%z")
elif '.' in self.value:
self.value = datetime.strptime(self.value, "%Y-%m-%dT%H:%M:%S.%f")
else:
self.value = datetime.strptime(self.value, "%Y-%m-%dT%H:%M:%S")
except ValueError:
# Slower, but if the other ones fail, that's a good fallback
self.value = parse(self.value)
# Default values
self.category = kwargs.pop('category', type_defaults['default_category'])
if self.category is None:
# In case the category key is passed, but None
self.category = type_defaults['default_category']
if self.category not in self.__categories:
raise NewAttributeError('{} is invalid, category has to be in {}'.format(self.category, (', '.join(self.__categories))))
self.to_ids = kwargs.pop('to_ids', bool(int(type_defaults['to_ids'])))
if self.to_ids is None:
self.to_ids = bool(int(type_defaults['to_ids']))
else:
self.to_ids = make_bool(self.to_ids)
if not isinstance(self.to_ids, bool):
raise NewAttributeError('{} is invalid, to_ids has to be True or False'.format(self.to_ids))
self.distribution = kwargs.pop('distribution', None)
if self.distribution is not None:
self.distribution = int(self.distribution)
if self.distribution not in [0, 1, 2, 3, 4, 5]:
raise NewAttributeError('{} is invalid, the distribution has to be in 0, 1, 2, 3, 4, 5'.format(self.distribution))
# other possible values
if kwargs.get('data'):
self.data = kwargs.pop('data')
if kwargs.get('id'):
self.id = int(kwargs.pop('id'))
if kwargs.get('event_id'):
self.event_id = int(kwargs.pop('event_id'))
if kwargs.get('timestamp'):
ts = kwargs.pop('timestamp')
if isinstance(ts, datetime):
self.timestamp = ts
else:
self.timestamp = datetime.fromtimestamp(int(ts), timezone.utc)
if kwargs.get('first_seen'):
fs = kwargs.pop('first_seen')
try:
# Faster
if sys.version_info >= (3, 7):
self.first_seen = datetime.fromisoformat(fs)
else:
self.first_seen = datetime.strptime(fs, "%Y-%m-%dT%H:%M:%S.%f%z")
except Exception:
# Use __setattr__
self.first_seen = fs
if kwargs.get('last_seen'):
ls = kwargs.pop('last_seen')
try:
# Faster
if sys.version_info >= (3, 7):
self.last_seen = datetime.fromisoformat(ls)
else:
self.last_seen = datetime.strptime(ls, "%Y-%m-%dT%H:%M:%S.%f%z")
except Exception:
# Use __setattr__
self.last_seen = ls
if kwargs.get('sharing_group_id'):
self.sharing_group_id = int(kwargs.pop('sharing_group_id'))
if self.distribution == 4:
# The distribution is set to sharing group, a sharing_group_id is required.
if not hasattr(self, 'sharing_group_id'):
raise NewAttributeError('If the distribution is set to sharing group, a sharing group ID is required.')
elif not self.sharing_group_id:
# Cannot be None or 0 either.
raise NewAttributeError('If the distribution is set to sharing group, a sharing group ID is required (cannot be {}).'.format(self.sharing_group_id))
if kwargs.get('Tag'):
[self.add_tag(tag) for tag in kwargs.pop('Tag')]
if kwargs.get('Sighting'):
[self.add_sighting(sighting) for sighting in kwargs.pop('Sighting')]
if kwargs.get('ShadowAttribute'):
[self.add_shadow_attribute(s_attr) for s_attr in kwargs.pop('ShadowAttribute')]
if kwargs.get('SharingGroup'):
self.SharingGroup = MISPSharingGroup()
self.SharingGroup.from_dict(**kwargs.pop('SharingGroup'))
# If the user wants to disable correlation, let them. Defaults to False.
self.disable_correlation = kwargs.pop("disable_correlation", False)
if self.disable_correlation is None:
self.disable_correlation = False
super().from_dict(**kwargs)
def to_dict(self) -> Dict:
to_return = super().to_dict()
if self.data:
to_return['data'] = base64.b64encode(self.data.getvalue()).decode()
return to_return
def _prepare_new_malware_sample(self):
if '|' in self.value:
# Get the filename, ignore the md5, because humans.
self.malware_filename, md5 = self.value.split('|')
else:
# Assuming the user only passed the filename
self.malware_filename = self.value
# m = hashlib.md5()
# m.update(self.data.getvalue())
self.value = self.malware_filename
# md5 = m.hexdigest()
# self.value = '{}|{}'.format(self.malware_filename, md5)
self._malware_binary = self.data
self.encrypt = True
def __is_misp_encrypted_file(self, f) -> bool:
files_list = f.namelist()
if len(files_list) != 2:
return False
md5_from_filename = ''
md5_from_file = ''
for name in files_list:
if name.endswith('.filename.txt'):
md5_from_filename = name.replace('.filename.txt', '')
else:
md5_from_file = name
if not md5_from_filename or not md5_from_file or md5_from_filename != md5_from_file:
return False
return True
def __repr__(self):
if hasattr(self, 'value'):
return '<{self.__class__.__name__}(type={self.type}, value={self.value})'.format(self=self)
return '<{self.__class__.__name__}(NotInitialized)'.format(self=self)
def verify(self, gpg_uid): # pragma: no cover
# Not used
if not has_pyme:
raise PyMISPError('pyme is required, please install: pip install --pre pyme3. You will also need libgpg-error-dev and libgpgme11-dev.')
signed_data = self._serialize()
with gpg.Context() as c:
keys = list(c.keylist(gpg_uid))
try:
c.verify(signed_data, signature=base64.b64decode(self.sig), verify=keys[:1])
return {self.uuid: True}
except Exception:
return {self.uuid: False}
def _serialize(self): # pragma: no cover
# Not used
return '{type}{category}{to_ids}{uuid}{timestamp}{comment}{deleted}{value}'.format(
type=self.type, category=self.category, to_ids=self.to_ids, uuid=self.uuid, timestamp=self.timestamp,
comment=self.comment, deleted=self.deleted, value=self.value).encode()
def sign(self, gpg_uid, passphrase=None): # pragma: no cover
# Not used
if not has_pyme:
raise PyMISPError('pyme is required, please install: pip install --pre pyme3. You will also need libgpg-error-dev and libgpgme11-dev.')
to_sign = self._serialize()
with gpg.Context() as c:
keys = list(c.keylist(gpg_uid))
c.signers = keys[:1]
if passphrase:
c.set_passphrase_cb(lambda *args: passphrase)
signed, _ = c.sign(to_sign, mode=mode.DETACH)
self.sig = base64.b64encode(signed).decode()
class MISPObjectReference(AbstractMISP):
_fields_for_feed: set = {'uuid', 'timestamp', 'relationship_type', 'comment',
'object_uuid', 'referenced_uuid'}
def __init__(self):
super().__init__()
self.uuid = str(uuid.uuid4())
self.object_uuid: str
self.referenced_uuid: str
self.relationship_type: str
def _set_default(self):
if not hasattr(self, 'comment'):
self.comment = ''
if not hasattr(self, 'timestamp'):
self.timestamp = datetime.timestamp(datetime.now())
def from_dict(self, **kwargs):
if 'ObjectReference' in kwargs:
kwargs = kwargs['ObjectReference']
super(MISPObjectReference, self).from_dict(**kwargs)
def __repr__(self) -> str:
if hasattr(self, 'referenced_uuid') and hasattr(self, 'object_uuid'):
return '<{self.__class__.__name__}(object_uuid={self.object_uuid}, referenced_uuid={self.referenced_uuid}, relationship_type={self.relationship_type})'.format(self=self)
return '<{self.__class__.__name__}(NotInitialized)'.format(self=self)
class MISPObject(AbstractMISP):
_fields_for_feed: set = {'name', 'meta-category', 'description', 'template_uuid',
'template_version', 'uuid', 'timestamp', 'distribution',
'sharing_group_id', 'comment', 'first_seen', 'last_seen'}
def __init__(self, name: str, strict: bool=False, standalone: bool=False, default_attributes_parameters: dict={}, **kwargs):
''' Master class representing a generic MISP object
:name: Name of the object
:strict: Enforce validation with the object templates
:standalone: The object will be pushed as directly on MISP, not as a part of an event.
In this case the ObjectReference needs to be pushed manually and cannot be in the JSON dump.
:default_attributes_parameters: Used as template for the attributes if they are not overwritten in add_attribute
:misp_objects_path_custom: Path to custom object templates
'''
super().__init__(**kwargs)
self._strict: bool = strict
self.name: str = name
self._known_template: bool = False
self.id: int
self._set_template(kwargs.get('misp_objects_path_custom'))
self.uuid: str = str(uuid.uuid4())
self.first_seen: datetime
self.last_seen: datetime
self.__fast_attribute_access: dict = defaultdict(list) # Hashtable object_relation: [attributes]
self.ObjectReference: List[MISPObjectReference] = []
self.Attribute: List[MISPObjectAttribute] = []
self.SharingGroup: MISPSharingGroup
self._default_attributes_parameters: dict
if isinstance(default_attributes_parameters, MISPAttribute):
# Just make sure we're not modifying an existing MISPAttribute
self._default_attributes_parameters = default_attributes_parameters.to_dict()
else:
self._default_attributes_parameters = default_attributes_parameters
if self._default_attributes_parameters:
# Let's clean that up
self._default_attributes_parameters.pop('value', None) # duh
self._default_attributes_parameters.pop('uuid', None) # duh
self._default_attributes_parameters.pop('id', None) # duh
self._default_attributes_parameters.pop('object_id', None) # duh
self._default_attributes_parameters.pop('type', None) # depends on the value
self._default_attributes_parameters.pop('object_relation', None) # depends on the value
self._default_attributes_parameters.pop('disable_correlation', None) # depends on the value
self._default_attributes_parameters.pop('to_ids', None) # depends on the value
self._default_attributes_parameters.pop('deleted', None) # doesn't make sense to pre-set it
self._default_attributes_parameters.pop('data', None) # in case the original in a sample or an attachment
# Those values are set for the current object, if they exist, but not pop'd because they are still useful for the attributes
self.distribution: int = self._default_attributes_parameters.get('distribution', 5)
self.sharing_group_id: int = self._default_attributes_parameters.get('sharing_group_id', 0)
else:
self.distribution = 5 # Default to inherit
self.sharing_group_id = 0
self._standalone = standalone
if self._standalone:
# Mark as non_jsonable because we need to add the references manually after the object(s) have been created
self.update_not_jsonable('ObjectReference')
def _load_template_path(self, template_path: Union[Path, str]) -> bool:
self._definition: Optional[Dict] = self._load_json(template_path)
if not self._definition:
return False
setattr(self, 'meta-category', self._definition['meta-category'])
self.template_uuid = self._definition['uuid']
self.description = self._definition['description']
self.template_version = self._definition['version']
return True
def _set_default(self):
if not hasattr(self, 'comment'):
self.comment = ''
if not hasattr(self, 'timestamp'):
self.timestamp = datetime.timestamp(datetime.now())
def _to_feed(self) -> Dict:
to_return = super(MISPObject, self)._to_feed()
if self.references:
to_return['ObjectReference'] = [reference._to_feed() for reference in self.references]
return to_return
def __setattr__(self, name, value):
if name in ['first_seen', 'last_seen']:
value = _make_datetime(value)
if name == 'last_seen' and hasattr(self, 'first_seen') and self.first_seen > value:
raise PyMISPError('last_seen ({value}) has to be after first_seen ({self.first_seen})')
if name == 'first_seen' and hasattr(self, 'last_seen') and self.last_seen < value:
raise PyMISPError('first_seen ({value}) has to be before last_seen ({self.last_seen})')
super().__setattr__(name, value)
def force_misp_objects_path_custom(self, misp_objects_path_custom: Union[Path, str], object_name: Optional[str]=None):
if object_name:
self.name = object_name
self._set_template(misp_objects_path_custom)
def _set_template(self, misp_objects_path_custom: Optional[Union[Path, str]]=None):
if misp_objects_path_custom:
# If misp_objects_path_custom is given, and an object with the given name exists, use that.
if isinstance(misp_objects_path_custom, str):
self.misp_objects_path = Path(misp_objects_path_custom)
else:
self.misp_objects_path = misp_objects_path_custom
# Try to get the template
self._known_template = self._load_template_path(self.misp_objects_path / self.name / 'definition.json')
if not self._known_template and self._strict:
raise UnknownMISPObjectTemplate('{} is unknown in the MISP object directory.'.format(self.name))
else:
# Then we have no meta-category, template_uuid, description and template_version
pass
@property
def disable_validation(self):
self._strict = False
@property
def attributes(self) -> List['MISPObjectAttribute']:
return self.Attribute
@attributes.setter
def attributes(self, attributes: List['MISPObjectAttribute']):
if all(isinstance(x, MISPObjectAttribute) for x in attributes):
self.Attribute = attributes
self.__fast_attribute_access = defaultdict(list)
else:
raise PyMISPError('All the attributes have to be of type MISPObjectAttribute.')
@property
def references(self) -> List[MISPObjectReference]:
return self.ObjectReference
@references.setter
def references(self, references: List[MISPObjectReference]):
if all(isinstance(x, MISPObjectReference) for x in references):
self.ObjectReference = references
else:
raise PyMISPError('All the attributes have to be of type MISPObjectReference.')
def from_dict(self, **kwargs):
if 'Object' in kwargs:
kwargs = kwargs['Object']
if self._known_template:
if kwargs.get('template_uuid') and kwargs['template_uuid'] != self.template_uuid:
if self._strict:
raise UnknownMISPObjectTemplate('UUID of the object is different from the one of the template.')
else:
self._known_template = False
if kwargs.get('template_version') and int(kwargs['template_version']) != self.template_version:
if self._strict:
raise UnknownMISPObjectTemplate('Version of the object ({}) is different from the one of the template ({}).'.format(kwargs['template_version'], self.template_version))
else:
self._known_template = False
if 'distribution' in kwargs and kwargs['distribution'] is not None:
self.distribution = kwargs.pop('distribution')
self.distribution = int(self.distribution)
if self.distribution not in [0, 1, 2, 3, 4, 5]:
raise NewAttributeError('{} is invalid, the distribution has to be in 0, 1, 2, 3, 4, 5'.format(self.distribution))
if kwargs.get('timestamp'):
ts = kwargs.pop('timestamp')
if isinstance(ts, datetime):
self.timestamp = ts
else:
self.timestamp = datetime.fromtimestamp(int(ts), timezone.utc)
if kwargs.get('first_seen'):
fs = kwargs.pop('first_seen')
try:
# Faster
if sys.version_info >= (3, 7):
self.first_seen = datetime.fromisoformat(fs)
else:
self.first_seen = datetime.strptime(fs, "%Y-%m-%dT%H:%M:%S.%f%z")
except Exception:
# Use __setattr__
self.first_seen = fs
if kwargs.get('last_seen'):
ls = kwargs.pop('last_seen')
try:
# Faster
if sys.version_info >= (3, 7):
self.last_seen = datetime.fromisoformat(ls)
else:
self.last_seen = datetime.strptime(ls, "%Y-%m-%dT%H:%M:%S.%f%z")
except Exception:
# Use __setattr__
self.last_seen = ls
if kwargs.get('Attribute'):
[self.add_attribute(**a) for a in kwargs.pop('Attribute')]
if kwargs.get('ObjectReference'):
[self.add_reference(**r) for r in kwargs.pop('ObjectReference')]
if kwargs.get('SharingGroup'):
self.SharingGroup = MISPSharingGroup()
self.SharingGroup.from_dict(**kwargs.pop('SharingGroup'))
# Not supported yet - https://github.com/MISP/PyMISP/issues/168
# if kwargs.get('Tag'):
# for tag in kwargs.pop('Tag'):
# self.add_tag(tag)
super().from_dict(**kwargs)
def add_reference(self, referenced_uuid: Union[AbstractMISP, str], relationship_type: str, comment: Optional[str]=None, **kwargs) -> MISPObjectReference:
"""Add a link (uuid) to an other object"""
if isinstance(referenced_uuid, AbstractMISP):
# Allow to pass an object or an attribute instead of its UUID
referenced_uuid = referenced_uuid.uuid
if kwargs.get('object_uuid'):
# Load existing object
object_uuid = kwargs.pop('object_uuid')
else:
# New reference
object_uuid = self.uuid
reference = MISPObjectReference()
reference.from_dict(object_uuid=object_uuid, referenced_uuid=referenced_uuid,
relationship_type=relationship_type, comment=comment, **kwargs)
self.ObjectReference.append(reference)
self.edited = True
return reference
def get_attributes_by_relation(self, object_relation: str) -> List[MISPAttribute]:
'''Returns the list of attributes with the given object relation in the object'''
return self._fast_attribute_access.get(object_relation, [])
@property
def _fast_attribute_access(self) -> Dict:
if not self.__fast_attribute_access:
for a in self.attributes:
self.__fast_attribute_access[a.object_relation].append(a)
return self.__fast_attribute_access
def has_attributes_by_relation(self, list_of_relations: List[str]) -> bool:
'''True if all the relations in the list are defined in the object'''
return all(relation in self._fast_attribute_access for relation in list_of_relations)
def add_attribute(self, object_relation: str, simple_value: Optional[Union[str, int, float]]=None, **value) -> Optional[MISPAttribute]:
"""Add an attribute. object_relation is required and the value key is a
dictionary with all the keys supported by MISPAttribute"""
if simple_value is not None: # /!\ The value *can* be 0
value = {'value': simple_value}
if value.get('value') in [None, '']:
logger.warning("The value of the attribute you're trying to add is None or empty string, skipping it. Object relation: {}".format(object_relation))
return None
if self._known_template and self._definition:
if object_relation in self._definition['attributes']:
attribute = MISPObjectAttribute(self._definition['attributes'][object_relation])
else:
# Woopsie, this object_relation is unknown, no sane defaults for you.
logger.warning("The template ({}) doesn't have the object_relation ({}) you're trying to add.".format(self.name, object_relation))
attribute = MISPObjectAttribute({})
else:
attribute = MISPObjectAttribute({})
# Overwrite the parameters of self._default_attributes_parameters with the ones of value
attribute.from_dict(object_relation=object_relation, **dict(self._default_attributes_parameters, **value))
# FIXME New syntax python3 only, keep for later.
# attribute.from_dict(object_relation=object_relation, **{**self._default_attributes_parameters, **value})
self.__fast_attribute_access[object_relation].append(attribute)
self.Attribute.append(attribute)
self.edited = True
return attribute
def add_attributes(self, object_relation: str, *attributes) -> List[Optional[MISPAttribute]]:
'''Add multiple attributes with the same object_relation.
Helper for object_relation when multiple is True in the template.
It is the same as calling multiple times add_attribute with the same object_relation.
'''
to_return = []
for attribute in attributes:
if isinstance(attribute, dict):
a = self.add_attribute(object_relation, **attribute)
else:
a = self.add_attribute(object_relation, value=attribute)
to_return.append(a)
return to_return
def to_dict(self, strict: bool=False) -> Dict:
if strict or self._strict and self._known_template:
self._validate()
return super(MISPObject, self).to_dict()
def to_json(self, sort_keys: bool=False, indent: Optional[int]=None, strict: bool=False):
if strict or self._strict and self._known_template:
self._validate()
return super(MISPObject, self).to_json(sort_keys=sort_keys, indent=indent)
def _validate(self) -> bool:
if not self._definition:
raise PyMISPError('No object definition available, unable to validate.')
"""Make sure the object we're creating has the required fields"""
if self._definition.get('required'):
required_missing = set(self._definition['required']) - set(self._fast_attribute_access.keys())
if required_missing:
raise InvalidMISPObject('{} are required.'.format(required_missing))
if self._definition.get('requiredOneOf'):
if not set(self._definition['requiredOneOf']) & set(self._fast_attribute_access.keys()):
# We ecpect at least one of the object_relation in requiredOneOf, and it isn't the case
raise InvalidMISPObject('At least one of the following attributes is required: {}'.format(', '.join(self._definition['requiredOneOf'])))
for rel, attrs in self._fast_attribute_access.items():
if len(attrs) == 1:
# object_relation's here only once, everything's cool, moving on
continue
if not self._definition['attributes'][rel].get('multiple'):
# object_relation's here more than once, but it isn't allowed in the template.
raise InvalidMISPObject('Multiple occurrences of {} is not allowed'.format(rel))
return True
def __repr__(self) -> str:
if hasattr(self, 'name'):
return '<{self.__class__.__name__}(name={self.name})'.format(self=self)
return '<{self.__class__.__name__}(NotInitialized)'.format(self=self)
class MISPEvent(AbstractMISP):
_fields_for_feed: set = {'uuid', 'info', 'threat_level_id', 'analysis', 'timestamp',
'publish_timestamp', 'published', 'date', 'extends_uuid'}
def __init__(self, describe_types: Optional[Dict]=None, strict_validation: bool=False, **kwargs):
super().__init__(**kwargs)
if strict_validation:
schema_file = 'schema.json'
else:
schema_file = 'schema-lax.json'
self.__json_schema = self._load_json(self.resources_path / schema_file)
if describe_types:
# This variable is used in add_attribute in order to avoid duplicating the structure
self.describe_types = describe_types
self.uuid: str = str(uuid.uuid4())
self.date: date
self.Attribute: List[MISPAttribute] = []
self.Object: List[MISPObject] = []
self.RelatedEvent: List[MISPEvent] = []
self.ShadowAttribute: List[MISPShadowAttribute] = []
self.SharingGroup: MISPSharingGroup
self.Tag: List[MISPTag] = []
def add_tag(self, tag: Optional[Union[str, MISPTag, dict]]=None, **kwargs) -> MISPTag:
return super()._add_tag(tag, **kwargs)
@property
def tags(self) -> List[MISPTag]:
"""Returns a lost of tags associated to this Event"""
return self.Tag
@tags.setter
def tags(self, tags: List[MISPTag]):
"""Set a list of prepared MISPTag."""
super()._set_tags(tags)
def _set_default(self):
"""There are a few keys that could, or need to be set by default for the feed generator"""
if not hasattr(self, 'published'):
self.published = True
if not hasattr(self, 'uuid'):
self.uuid = str(uuid.uuid4())
if not hasattr(self, 'extends_uuid'):
self.extends_uuid = ''
if not hasattr(self, 'date'):
self.set_date(date.today())
if not hasattr(self, 'timestamp'):
self.timestamp = datetime.timestamp(datetime.now())
if not hasattr(self, 'publish_timestamp'):
self.publish_timestamp = datetime.timestamp(datetime.now())
if not hasattr(self, 'analysis'):
# analysis: 0 means initial, 1 ongoing, 2 completed
self.analysis = 2
if not hasattr(self, 'threat_level_id'):
# threat_level_id 4 means undefined. Tags are recommended.
self.threat_level_id = 4
@property
def manifest(self) -> Dict:
required = ['info', 'Orgc']
for r in required:
if not hasattr(self, r):
raise PyMISPError('The field {} is required to generate the event manifest.')
self._set_default()
return {
self.uuid: {
'Orgc': self.Orgc._to_feed(),
'Tag': list(filter(None, [tag._to_feed() for tag in self.tags])),
'info': self.info,
'date': self.date.isoformat(),
'analysis': self.analysis,
'threat_level_id': self.threat_level_id,
'timestamp': self._datetime_to_timestamp(self.timestamp)
}
}
def attributes_hashes(self, algorithm: str='sha512') -> List[str]:
to_return: List[str] = []
for attribute in self.attributes:
to_return += attribute.hash_values(algorithm)
for obj in self.objects:
for attribute in obj.attributes:
to_return += attribute.hash_values(algorithm)
return to_return
def to_feed(self, valid_distributions: List[int]=[0, 1, 2, 3, 4, 5], with_meta: bool=False) -> Dict:
""" Generate a json output for MISP Feed.
Notes:
* valid_distributions only makes sense if the distribution key is set (i.e. the event is exported from a MISP instance)
"""
required = ['info', 'Orgc']
for r in required:
if not hasattr(self, r):
raise PyMISPError(f'The field {r} is required to generate the event feed output.')
if (hasattr(self, 'distribution')
and self.distribution is not None
and int(self.distribution) not in valid_distributions):
return {}
to_return = super()._to_feed()
if with_meta:
to_return['_hashes'] = []
to_return['_manifest'] = self.manifest
to_return['Orgc'] = self.Orgc._to_feed()
to_return['Tag'] = list(filter(None, [tag._to_feed() for tag in self.tags]))
if self.attributes:
to_return['Attribute'] = []
for attribute in self.attributes:
if (valid_distributions and attribute.get('distribution') is not None and attribute.distribution not in valid_distributions):
continue
to_return['Attribute'].append(attribute._to_feed())
if with_meta:
to_return['_hashes'] += attribute.hash_values('md5')
if self.objects:
to_return['Object'] = []
for obj in self.objects:
if (valid_distributions and obj.get('distribution') is not None and obj.distribution not in valid_distributions):
continue
obj_to_attach = obj._to_feed()
obj_to_attach['Attribute'] = []
for attribute in obj.attributes:
if (valid_distributions and attribute.get('distribution') is not None and attribute.distribution not in valid_distributions):
continue
obj_to_attach['Attribute'].append(attribute._to_feed())
if with_meta:
to_return['_hashes'] += attribute.hash_values('md5')
to_return['Object'].append(obj_to_attach)
return {'Event': to_return}
@property
def known_types(self) -> List[str]:
return self.describe_types['types']
@property
def org(self) -> MISPOrganisation:
return self.Org
@property
def orgc(self) -> MISPOrganisation:
return self.Orgc
@orgc.setter
def orgc(self, orgc: MISPOrganisation):
if isinstance(orgc, MISPOrganisation):
self.Orgc = orgc
else:
raise PyMISPError('Orgc must be of type MISPOrganisation.')
@property
def attributes(self) -> List[MISPAttribute]:
return self.Attribute
@attributes.setter
def attributes(self, attributes: List[MISPAttribute]):
if all(isinstance(x, MISPAttribute) for x in attributes):
self.Attribute = attributes
else:
raise PyMISPError('All the attributes have to be of type MISPAttribute.')
@property
def shadow_attributes(self) -> List[MISPShadowAttribute]:
return self.ShadowAttribute
@shadow_attributes.setter
def shadow_attributes(self, shadow_attributes: List[MISPShadowAttribute]):
if all(isinstance(x, MISPShadowAttribute) for x in shadow_attributes):
self.ShadowAttribute = shadow_attributes
else:
raise PyMISPError('All the attributes have to be of type MISPShadowAttribute.')
@property
def related_events(self) -> List['MISPEvent']:
return self.RelatedEvent
@property
def objects(self) -> List[MISPObject]:
return self.Object
@objects.setter
def objects(self, objects: List[MISPObject]):
if all(isinstance(x, MISPObject) for x in objects):
self.Object = objects
else:
raise PyMISPError('All the attributes have to be of type MISPObject.')
def load_file(self, event_path: Union[Path, str], validate: bool=False, metadata_only: bool=False):
"""Load a JSON dump from a file on the disk"""
if not os.path.exists(event_path):
raise PyMISPError('Invalid path, unable to load the event.')
with open(event_path, 'rb') as f:
self.load(f, validate, metadata_only)
def load(self, json_event: Union[IO, str, bytes, dict], validate: bool=False, metadata_only: bool=False):
"""Load a JSON dump from a pseudo file or a JSON string"""
if isinstance(json_event, IOBase):
# python2 and python3 compatible to find if we have a file
json_event = json_event.read()
if isinstance(json_event, (str, bytes)):
json_event = json.loads(json_event)
if isinstance(json_event, dict) and 'response' in json_event and isinstance(json_event['response'], list):
event = json_event['response'][0]
else:
event = json_event
if not event:
raise PyMISPError('Invalid event')
if metadata_only:
event.pop('Attribute', None)
event.pop('Object', None)
self.from_dict(**event)
if validate:
jsonschema.validate(json.loads(self.to_json()), self.__json_schema)
def __setattr__(self, name, value):
if name in ['date']:
if isinstance(value, date):
pass
elif isinstance(value, str):
if sys.version_info >= (3, 7):
try:
# faster
value = date.fromisoformat(value)
except Exception:
value = parse(value).date()
else:
value = parse(value).date()
elif isinstance(value, (int, float)):
value = date.fromtimestamp(value)
elif isinstance(value, datetime):
value = value.date()
else:
raise NewEventError(f'Invalid format for the date: {type(value)} - {value}')
super().__setattr__(name, value)
def set_date(self, d: Optional[Union[str, int, float, datetime, date]]=None, ignore_invalid: bool=False):
"""Set a date for the event (string, datetime, or date object)"""
if isinstance(d, (str, int, float, datetime, date)):
self.date = d # type: ignore
elif ignore_invalid:
self.date = date.today()
else:
raise NewEventError(f'Invalid format for the date: {type(d)} - {d}')
def from_dict(self, **kwargs):
if 'Event' in kwargs:
kwargs = kwargs['Event']
# Required value
self.info = kwargs.pop('info', None)
if self.info is None:
raise NewEventError('The info field of the new event is required.')
# Default values for a valid event to send to a MISP instance
self.distribution = kwargs.pop('distribution', None)
if self.distribution is not None:
self.distribution = int(self.distribution)
if self.distribution not in [0, 1, 2, 3, 4]:
raise NewEventError(f'{self.info}: {self.distribution} is invalid, the distribution has to be in 0, 1, 2, 3, 4')
if kwargs.get('threat_level_id') is not None:
self.threat_level_id = int(kwargs.pop('threat_level_id'))
if self.threat_level_id not in [1, 2, 3, 4]:
raise NewEventError(f'{self.info}: {self.threat_level_id} is invalid, the threat_level_id has to be in 1, 2, 3, 4')
if kwargs.get('analysis') is not None:
self.analysis = int(kwargs.pop('analysis'))
if self.analysis not in [0, 1, 2]:
raise NewEventError(f'{self.info}: {self.analysis} is invalid, the analysis has to be in 0, 1, 2')
self.published = kwargs.pop('published', None)
if self.published is True:
self.publish()
else:
self.unpublish()
if kwargs.get('date'):
self.set_date(kwargs.pop('date'))
if kwargs.get('Attribute'):
[self.add_attribute(**a) for a in kwargs.pop('Attribute')]
# All other keys
if kwargs.get('id'):
self.id = int(kwargs.pop('id'))
if kwargs.get('orgc_id'):
self.orgc_id = int(kwargs.pop('orgc_id'))
if kwargs.get('org_id'):
self.org_id = int(kwargs.pop('org_id'))
if kwargs.get('timestamp'):
self.timestamp = datetime.fromtimestamp(int(kwargs.pop('timestamp')), timezone.utc)
if kwargs.get('publish_timestamp'):
self.publish_timestamp = datetime.fromtimestamp(int(kwargs.pop('publish_timestamp')), timezone.utc)
if kwargs.get('sighting_timestamp'):
self.sighting_timestamp = datetime.fromtimestamp(int(kwargs.pop('sighting_timestamp')), timezone.utc)
if kwargs.get('sharing_group_id'):
self.sharing_group_id = int(kwargs.pop('sharing_group_id'))
if kwargs.get('RelatedEvent'):
for rel_event in kwargs.pop('RelatedEvent'):
sub_event = MISPEvent()
sub_event.load(rel_event)
self.RelatedEvent.append({'Event': sub_event})
if kwargs.get('Tag'):
[self.add_tag(tag) for tag in kwargs.pop('Tag')]
if kwargs.get('Object'):
[self.add_object(obj) for obj in kwargs.pop('Object')]
if kwargs.get('Org'):
self.Org = MISPOrganisation()
self.Org.from_dict(**kwargs.pop('Org'))
if kwargs.get('Orgc'):
self.Orgc = MISPOrganisation()
self.Orgc.from_dict(**kwargs.pop('Orgc'))
if kwargs.get('SharingGroup'):
self.SharingGroup = MISPSharingGroup()
self.SharingGroup.from_dict(**kwargs.pop('SharingGroup'))
super(MISPEvent, self).from_dict(**kwargs)
def to_dict(self) -> Dict:
to_return = super().to_dict()
if to_return.get('date'):
if isinstance(self.date, datetime):
self.date = self.date.date()
to_return['date'] = self.date.isoformat()
if to_return.get('publish_timestamp'):
to_return['publish_timestamp'] = self._datetime_to_timestamp(self.publish_timestamp)
if to_return.get('sighting_timestamp'):
to_return['sighting_timestamp'] = self._datetime_to_timestamp(self.sighting_timestamp)
return to_return
def add_proposal(self, shadow_attribute=None, **kwargs) -> MISPShadowAttribute:
"""Alias for add_shadow_attribute"""
return self.add_shadow_attribute(shadow_attribute, **kwargs)
def add_shadow_attribute(self, shadow_attribute=None, **kwargs) -> MISPShadowAttribute:
"""Add a tag to the attribute (by name or a MISPTag object)"""
if isinstance(shadow_attribute, MISPShadowAttribute):
misp_shadow_attribute = shadow_attribute
elif isinstance(shadow_attribute, dict):
misp_shadow_attribute = MISPShadowAttribute()
misp_shadow_attribute.from_dict(**shadow_attribute)
elif kwargs:
misp_shadow_attribute = MISPShadowAttribute()
misp_shadow_attribute.from_dict(**kwargs)
else:
raise PyMISPError("The shadow_attribute is in an invalid format (can be either string, MISPShadowAttribute, or an expanded dict): {}".format(shadow_attribute))
self.shadow_attributes.append(misp_shadow_attribute)
self.edited = True
return misp_shadow_attribute
def get_attribute_tag(self, attribute_identifier: str) -> List[MISPTag]:
"""Return the tags associated to an attribute or an object attribute.
:attribute_identifier: can be an ID, UUID, or the value.
"""
tags: List[MISPTag] = []
for a in self.attributes + [attribute for o in self.objects for attribute in o.attributes]:
if ((hasattr(a, 'id') and a.id == attribute_identifier)
or (hasattr(a, 'uuid') and a.uuid == attribute_identifier)
or (hasattr(a, 'value') and attribute_identifier == a.value
or (isinstance(a.value, str) and attribute_identifier in a.value.split('|')))):
tags += a.tags
return tags
def add_attribute_tag(self, tag: Union[MISPTag, str], attribute_identifier: str) -> List[MISPAttribute]:
"""Add a tag to an existing attribute, raise an Exception if the attribute doesn't exists.
:tag: Tag name as a string, MISPTag instance, or dictionary
:attribute_identifier: can be an ID, UUID, or the value.
"""
attributes = []
for a in self.attributes + [attribute for o in self.objects for attribute in o.attributes]:
if ((hasattr(a, 'id') and a.id == attribute_identifier)
or (hasattr(a, 'uuid') and a.uuid == attribute_identifier)
or (hasattr(a, 'value') and attribute_identifier == a.value
or (isinstance(a.value, str) and attribute_identifier in a.value.split('|')))):
a.add_tag(tag)
attributes.append(a)
if not attributes:
raise PyMISPError('No attribute with identifier {} found.'.format(attribute_identifier))
self.edited = True
return attributes
def publish(self):
"""Mark the attribute as published"""
self.published = True
def unpublish(self):
"""Mark the attribute as un-published (set publish flag to false)"""
self.published = False
def delete_attribute(self, attribute_id: str):
"""Delete an attribute, you can search by ID or UUID"""
for a in self.attributes:
if ((hasattr(a, 'id') and a.id == attribute_id)
or (hasattr(a, 'uuid') and a.uuid == attribute_id)):
a.delete()
break
else:
raise PyMISPError('No attribute with UUID/ID {} found.'.format(attribute_id))
def add_attribute(self, type: str, value: Union[str, int, float], **kwargs) -> Union[MISPAttribute, List[MISPAttribute]]:
"""Add an attribute. type and value are required but you can pass all
other parameters supported by MISPAttribute"""
attr_list: List[MISPAttribute] = []
if isinstance(value, list):
attr_list = [self.add_attribute(type=type, value=a, **kwargs) for a in value]
else:
attribute = MISPAttribute(describe_types=self.describe_types)
attribute.from_dict(type=type, value=value, **kwargs)
self.attributes.append(attribute)
self.edited = True
if attr_list:
return attr_list
return attribute
def get_object_by_id(self, object_id: Union[str, int]) -> MISPObject:
"""Get an object by ID (the ID is the one set by the server when creating the new object)"""
for obj in self.objects:
if hasattr(obj, 'id') and int(obj.id) == int(object_id):
return obj
raise InvalidMISPObject('Object with {} does not exist in this event'.format(object_id))
def get_object_by_uuid(self, object_uuid: str) -> MISPObject:
"""Get an object by UUID (UUID is set by the server when creating the new object)"""
for obj in self.objects:
if hasattr(obj, 'uuid') and obj.uuid == object_uuid:
return obj
raise InvalidMISPObject('Object with {} does not exist in this event'.format(object_uuid))
def get_objects_by_name(self, object_name: str) -> List[MISPObject]:
"""Get an object by UUID (UUID is set by the server when creating the new object)"""
objects = []
for obj in self.objects:
if hasattr(obj, 'uuid') and obj.name == object_name:
objects.append(obj)
return objects
def add_object(self, obj: Union[MISPObject, dict, None]=None, **kwargs) -> MISPObject:
"""Add an object to the Event, either by passing a MISPObject, or a dictionary"""
if isinstance(obj, MISPObject):
misp_obj = obj
elif isinstance(obj, dict):
misp_obj = MISPObject(name=obj.pop('name'), strict=obj.pop('strict', False),
default_attributes_parameters=obj.pop('default_attributes_parameters', {}),
**obj)
misp_obj.from_dict(**obj)
elif kwargs:
misp_obj = MISPObject(name=kwargs.pop('name'), strict=kwargs.pop('strict', False),
default_attributes_parameters=kwargs.pop('default_attributes_parameters', {}),
**kwargs)
misp_obj.from_dict(**kwargs)
else:
raise InvalidMISPObject("An object to add to an existing Event needs to be either a MISPObject, or a plain python dictionary")
self.Object.append(misp_obj)
self.edited = True
return misp_obj
def run_expansions(self):
for index, attribute in enumerate(self.attributes):
if 'expand' not in attribute:
continue
# NOTE: Always make sure the attribute with the expand key is either completely removed,
# of the key is deleted to avoid seeing it processed again on MISP side
elif attribute.expand == 'binary':
try:
from .tools import make_binary_objects
except ImportError as e:
logger.info('Unable to load make_binary_objects: {}'.format(e))
continue
file_object, bin_type_object, bin_section_objects = make_binary_objects(pseudofile=attribute.malware_binary, filename=attribute.malware_filename)
self.add_object(file_object)
if bin_type_object:
self.add_object(bin_type_object)
if bin_section_objects:
for bin_section_object in bin_section_objects:
self.add_object(bin_section_object)
self.attributes.pop(index)
else:
logger.warning('No expansions for this data type ({}). Open an issue if needed.'.format(attribute.type))
def __repr__(self) -> str:
if hasattr(self, 'info'):
return '<{self.__class__.__name__}(info={self.info})'.format(self=self)
return '<{self.__class__.__name__}(NotInitialized)'.format(self=self)
def _serialize(self): # pragma: no cover
return '{date}{threat_level_id}{info}{uuid}{analysis}{timestamp}'.format(
date=self.date, threat_level_id=self.threat_level_id, info=self.info,
uuid=self.uuid, analysis=self.analysis, timestamp=self.timestamp).encode()
def _serialize_sigs(self): # pragma: no cover
# Not used
all_sigs = self.sig
for a in self.attributes:
all_sigs += a.sig
return all_sigs.encode()
def sign(self, gpg_uid, passphrase=None): # pragma: no cover
# Not used
if not has_pyme:
raise PyMISPError('pyme is required, please install: pip install --pre pyme3. You will also need libgpg-error-dev and libgpgme11-dev.')
to_sign = self._serialize()
with gpg.Context() as c:
keys = list(c.keylist(gpg_uid))
c.signers = keys[:1]
if passphrase:
c.set_passphrase_cb(lambda *args: passphrase)
signed, _ = c.sign(to_sign, mode=mode.DETACH)
self.sig = base64.b64encode(signed).decode()
for a in self.attributes:
a.sign(gpg_uid, passphrase)
to_sign_global = self._serialize_sigs()
with gpg.Context() as c:
keys = list(c.keylist(gpg_uid))
c.signers = keys[:1]
if passphrase:
c.set_passphrase_cb(lambda *args: passphrase)
signed, _ = c.sign(to_sign_global, mode=mode.DETACH)
self.global_sig = base64.b64encode(signed).decode()
def verify(self, gpg_uid): # pragma: no cover
# Not used
if not has_pyme:
raise PyMISPError('pyme is required, please install: pip install --pre pyme3. You will also need libgpg-error-dev and libgpgme11-dev.')
to_return = {}
signed_data = self._serialize()
with gpg.Context() as c:
keys = list(c.keylist(gpg_uid))
try:
c.verify(signed_data, signature=base64.b64decode(self.sig), verify=keys[:1])
to_return[self.uuid] = True
except Exception:
to_return[self.uuid] = False
for a in self.attributes:
to_return.update(a.verify(gpg_uid))
to_verify_global = self._serialize_sigs()
with gpg.Context() as c:
keys = list(c.keylist(gpg_uid))
try:
c.verify(to_verify_global, signature=base64.b64decode(self.global_sig), verify=keys[:1])
to_return['global'] = True
except Exception:
to_return['global'] = False
return to_return
class MISPObjectTemplate(AbstractMISP):
def from_dict(self, **kwargs):
if 'ObjectTemplate' in kwargs:
kwargs = kwargs['ObjectTemplate']
super().from_dict(**kwargs)
def __repr__(self) -> str:
return '<{self.__class__.__name__}(self.name)'.format(self=self)
class MISPUser(AbstractMISP):
def __init__(self, **kwargs):
super().__init__(**kwargs)
self.email: str
def from_dict(self, **kwargs):
if 'User' in kwargs:
kwargs = kwargs['User']
super().from_dict(**kwargs)
if hasattr(self, 'password') and set(self.password) == set(['*']):
self.password = None
def __repr__(self) -> str:
if hasattr(self, 'email'):
return '<{self.__class__.__name__}(email={self.email})'.format(self=self)
return '<{self.__class__.__name__}(NotInitialized)'.format(self=self)
class MISPFeed(AbstractMISP):
def from_dict(self, **kwargs):
if 'Feed' in kwargs:
kwargs = kwargs['Feed']
super().from_dict(**kwargs)
if hasattr(self, 'settings'):
self.settings = json.loads(self.settings)
class MISPWarninglist(AbstractMISP):
def from_dict(self, **kwargs):
if 'Warninglist' in kwargs:
kwargs = kwargs['Warninglist']
super().from_dict(**kwargs)
class MISPTaxonomy(AbstractMISP):
def from_dict(self, **kwargs):
if 'Taxonomy' in kwargs:
kwargs = kwargs['Taxonomy']
super().from_dict(**kwargs)
class MISPGalaxy(AbstractMISP):
def from_dict(self, **kwargs):
if 'Galaxy' in kwargs:
kwargs = kwargs['Galaxy']
super().from_dict(**kwargs)
class MISPNoticelist(AbstractMISP):
def from_dict(self, **kwargs):
if 'Noticelist' in kwargs:
kwargs = kwargs['Noticelist']
super().from_dict(**kwargs)
class MISPRole(AbstractMISP):
def __init__(self, **kwargs):
super().__init__(**kwargs)
self.perm_admin: int
self.perm_site_admin: int
def from_dict(self, **kwargs):
if 'Role' in kwargs:
kwargs = kwargs['Role']
super().from_dict(**kwargs)
class MISPServer(AbstractMISP):
def from_dict(self, **kwargs):
if 'Server' in kwargs:
kwargs = kwargs['Server']
super().from_dict(**kwargs)
class MISPLog(AbstractMISP):
def __init__(self, **kwargs):
super().__init__(**kwargs)
self.model: str
self.action: str
self.title: str
def from_dict(self, **kwargs):
if 'Log' in kwargs:
kwargs = kwargs['Log']
super().from_dict(**kwargs)
def __repr__(self) -> str:
return '<{self.__class__.__name__}({self.model}, {self.action}, {self.title})'.format(self=self)
class MISPEventDelegation(AbstractMISP):
def __init__(self, **kwargs):
super().__init__(**kwargs)
self.org_id: int
self.requester_org_id: int
self.event_id: int
def from_dict(self, **kwargs):
if 'EventDelegation' in kwargs:
kwargs = kwargs['EventDelegation']
super().from_dict(**kwargs)
def __repr__(self) -> str:
return '<{self.__class__.__name__}(org_id={self.org_id}, requester_org_id={self.requester_org_id}, {self.event_id})'.format(self=self)
class MISPObjectAttribute(MISPAttribute):
_fields_for_feed: set = {'uuid', 'object_relation', 'value', 'category', 'type',
'comment', 'data', 'timestamp', 'to_ids', 'disable_correlation'}
def __init__(self, definition):
super().__init__()
self._definition = definition
def from_dict(self, object_relation: str, value: Union[str, int, float], **kwargs): # type: ignore
# NOTE: Signature of "from_dict" incompatible with supertype "MISPAttribute"
self.object_relation = object_relation
self.value = value
if 'Attribute' in kwargs:
kwargs = kwargs['Attribute']
# Initialize the new MISPAttribute
# Get the misp attribute type from the definition
self.type = kwargs.pop('type', None)
if self.type is None:
self.type = self._definition.get('misp-attribute')
if 'category' not in kwargs and 'categories' in self._definition:
# Get first category in the list from the object template as default
self.category = self._definition['categories'][0]
self.disable_correlation = kwargs.pop('disable_correlation', None)
if self.disable_correlation is None:
# The correlation can be disabled by default in the object definition.
# Use this value if it isn't overloaded by the object
self.disable_correlation = self._definition.get('disable_correlation')
self.to_ids = kwargs.pop('to_ids', None)
if self.to_ids is None:
# Same for the to_ids flag
self.to_ids = self._definition.get('to_ids')
if not self.type:
raise NewAttributeError("The type of the attribute is required. Is the object template missing?")
super().from_dict(**{**self, **kwargs})
def __repr__(self):
if hasattr(self, 'value'):
return '<{self.__class__.__name__}(object_relation={self.object_relation}, value={self.value})'.format(self=self)
return '<{self.__class__.__name__}(NotInitialized)'.format(self=self)
class MISPCommunity(AbstractMISP):
def from_dict(self, **kwargs):
if 'Community' in kwargs:
kwargs = kwargs['Community']
super().from_dict(**kwargs)
def __repr__(self):
return f'<{self.__class__.__name__}(name={self.name}, uuid={self.uuid})'
class MISPUserSetting(AbstractMISP):
def from_dict(self, **kwargs):
if 'UserSetting' in kwargs:
kwargs = kwargs['UserSetting']
super().from_dict(**kwargs)
def __repr__(self):
return f'<{self.__class__.__name__}(name={self.setting}'
class MISPInbox(AbstractMISP):
def __init__(self, **kwargs):
super().__init__(**kwargs)
self.data: Dict
def from_dict(self, **kwargs):
if 'Inbox' in kwargs:
kwargs = kwargs['Inbox']
super().from_dict(**kwargs)
def __repr__(self):
return f'<{self.__class__.__name__}(name={self.type})>'
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