# -*- coding: utf-8 -*-
import datetime
import json
import os
import base64
from io import BytesIO
from zipfile import ZipFile
import hashlib
import sys
import uuid
from collections import defaultdict
from . import deprecated
from .abstract import AbstractMISP
from .exceptions import UnknownMISPObjectTemplate, InvalidMISPObject, PyMISPError, NewEventError, NewAttributeError
import six # Remove that import when discarding python2 support.
import logging
logger = logging.getLogger('pymisp')
if six.PY2:
logger.warning("You're using python 2, it is strongly recommended to use python >=3.5")
# This is required because Python 2 is a pain.
from datetime import tzinfo, timedelta
class UTC(tzinfo):
"""UTC"""
def utcoffset(self, dt):
return timedelta(0)
def tzname(self, dt):
return "UTC"
def dst(self, dt):
return timedelta(0)
try:
from dateutil.parser import parse
except ImportError:
logger.exception("Cannot import dateutil")
pass
try:
import jsonschema
except ImportError:
logger.exception("Cannot import jsonschema")
pass
try:
# pyme renamed to gpg the 2016-10-28
import gpg
from gpg.constants.sig import mode
has_pyme = True
except ImportError:
try:
# pyme renamed to gpg the 2016-10-28
import pyme as gpg
from pyme.constants.sig import mode
has_pyme = True
except ImportError:
has_pyme = False
# Least dirty way to support python 2 and 3
try:
basestring
unicode
except NameError:
basestring = str
unicode = str
def _int_to_str(d):
# transform all integer back to string
for k, v in d.items():
if isinstance(v, (int, float)) and not isinstance(v, bool):
d[k] = str(v)
return d
class MISPAttribute(AbstractMISP):
def __init__(self, describe_types=None, strict=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(MISPAttribute, self).__init__()
if not describe_types:
ressources_path = os.path.join(os.path.abspath(os.path.dirname(__file__)), 'data')
with open(os.path.join(ressources_path, 'describeTypes.json'), 'r') as f:
t = json.load(f)
describe_types = t['result']
self.__categories = describe_types['categories']
self._types = describe_types['types']
self.__category_type_mapping = describe_types['category_type_mappings']
self.__sane_default = describe_types['sane_defaults']
self.__strict = strict
self.ShadowAttribute = []
@property
def known_types(self):
"""Returns a list of all the known MISP attributes types"""
return self._types
@property
def malware_binary(self):
"""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):
return self.ShadowAttribute
@shadow_attributes.setter
def shadow_attributes(self, shadow_attributes):
"""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.')
def delete(self):
"""Mark the attribute as deleted (soft delete)"""
self.deleted = True
def add_proposal(self, shadow_attribute=None, **kwargs):
"""Alias for add_shadow_attribute"""
self.add_shadow_attribute(shadow_attribute, **kwargs)
def add_shadow_attribute(self, shadow_attribute=None, **kwargs):
"""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
def from_dict(self, **kwargs):
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._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.')
# 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']))
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')
self._load_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'):
if sys.version_info >= (3, 3):
self.timestamp = datetime.datetime.fromtimestamp(int(kwargs.pop('timestamp')), datetime.timezone.utc)
else:
self.timestamp = datetime.datetime.fromtimestamp(int(kwargs.pop('timestamp')), UTC())
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'):
for tag in kwargs.pop('Tag'):
self.add_tag(tag)
if kwargs.get('ShadowAttribute'):
for s_attr in kwargs.pop('ShadowAttribute'):
self.add_shadow_attribute(s_attr)
# 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(MISPAttribute, self).from_dict(**kwargs)
def to_dict(self):
to_return = super(MISPAttribute, self).to_dict()
if to_return.get('data'):
to_return['data'] = base64.b64encode(self.data.getvalue()).decode()
to_return = _int_to_str(to_return)
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):
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 _load_data(self):
if not isinstance(self.data, BytesIO):
self.data = BytesIO(base64.b64decode(self.data))
if self.type == 'malware-sample':
try:
with ZipFile(self.data) as f:
if not self.__is_misp_encrypted_file(f):
raise Exception('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 __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()
@deprecated
def get_known_types(self): # pragma: no cover
return self.known_types
@deprecated
def get_malware_binary(self): # pragma: no cover
return self.malware_binary
@deprecated
def _json(self): # pragma: no cover
return self.to_dict()
@deprecated
def _json_full(self): # pragma: no cover
return self.to_dict()
@deprecated
def set_all_values(self, **kwargs): # pragma: no cover
self.from_dict(**kwargs)
class MISPEvent(AbstractMISP):
def __init__(self, describe_types=None, strict_validation=False):
super(MISPEvent, self).__init__()
ressources_path = os.path.join(os.path.abspath(os.path.dirname(__file__)), 'data')
if strict_validation:
with open(os.path.join(ressources_path, 'schema.json'), 'r') as f:
self.__json_schema = json.load(f)
else:
with open(os.path.join(ressources_path, 'schema-lax.json'), 'r') as f:
self.__json_schema = json.load(f)
if not describe_types:
with open(os.path.join(ressources_path, 'describeTypes.json'), 'r') as f:
t = json.load(f)
describe_types = t['result']
self._types = describe_types['types']
self.Attribute = []
self.Object = []
self.RelatedEvent = []
self.ShadowAttribute = []
@property
def known_types(self):
return self._types
@property
def attributes(self):
return self.Attribute
@attributes.setter
def attributes(self, attributes):
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):
return self.ShadowAttribute
@shadow_attributes.setter
def shadow_attributes(self, shadow_attributes):
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):
return self.RelatedEvent
@property
def objects(self):
return self.Object
@objects.setter
def objects(self, objects):
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):
"""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, 'r') as f:
self.load(f)
def load(self, json_event):
"""Load a JSON dump from a pseudo file or a JSON string"""
if hasattr(json_event, 'read'):
# python2 and python3 compatible to find if we have a file
json_event = json_event.read()
if isinstance(json_event, basestring):
json_event = json.loads(json_event)
if json_event.get('response'):
event = json_event.get('response')[0]
else:
event = json_event
if not event:
raise PyMISPError('Invalid event')
# Invalid event created by MISP up to 2.4.52 (attribute_count is none instead of '0')
if (event.get('Event') and
'attribute_count' in event.get('Event') and
event.get('Event').get('attribute_count') is None):
event['Event']['attribute_count'] = '0'
jsonschema.validate(event, self.__json_schema)
e = event.get('Event')
self.from_dict(**e)
def set_date(self, date, ignore_invalid=False):
"""Set a date for the event (string, datetime, or date object)"""
if isinstance(date, basestring) or isinstance(date, unicode):
self.date = parse(date).date()
elif isinstance(date, datetime.datetime):
self.date = date.date()
elif isinstance(date, datetime.date):
self.date = date
else:
if ignore_invalid:
self.date = datetime.date.today()
else:
raise NewEventError('Invalid format for the date: {} - {}'.format(date, type(date)))
def from_dict(self, **kwargs):
# Required value
self.info = kwargs.pop('info', None)
if not self.info:
raise NewAttributeError('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 NewAttributeError('{} is invalid, the distribution has to be in 0, 1, 2, 3, 4'.format(self.distribution))
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('{} is invalid, the threat_level has to be in 1, 2, 3, 4'.format(self.threat_level_id))
if kwargs.get('analysis') is not None:
self.analysis = int(kwargs.pop('analysis'))
if self.analysis not in [0, 1, 2]:
raise NewEventError('{} is invalid, the analysis has to be in 0, 1, 2'.format(self.analysis))
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'):
for a in kwargs.pop('Attribute'):
self.add_attribute(**a)
# 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'):
if sys.version_info >= (3, 3):
self.timestamp = datetime.datetime.fromtimestamp(int(kwargs.pop('timestamp')), datetime.timezone.utc)
else:
self.timestamp = datetime.datetime.fromtimestamp(int(kwargs.pop('timestamp')), UTC())
if kwargs.get('publish_timestamp'):
if sys.version_info >= (3, 3):
self.publish_timestamp = datetime.datetime.fromtimestamp(int(kwargs.pop('publish_timestamp')), datetime.timezone.utc)
else:
self.publish_timestamp = datetime.datetime.fromtimestamp(int(kwargs.pop('publish_timestamp')), 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(sub_event)
if kwargs.get('Tag'):
for tag in kwargs.pop('Tag'):
self.add_tag(tag)
if kwargs.get('Object'):
for obj in kwargs.pop('Object'):
self.add_object(obj)
super(MISPEvent, self).from_dict(**kwargs)
def to_dict(self):
to_return = super(MISPEvent, self).to_dict()
if to_return.get('date'):
if isinstance(self.date, datetime.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)
to_return = _int_to_str(to_return)
to_return = {'Event': to_return}
return to_return
def add_proposal(self, shadow_attribute=None, **kwargs):
"""Alias for add_shadow_attribute"""
self.add_shadow_attribute(shadow_attribute, **kwargs)
def add_shadow_attribute(self, shadow_attribute=None, **kwargs):
"""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
def get_attribute_tag(self, attribute_identifier):
'''Return the tags associated to an attribute or an object attribute.
:attribute_identifier: can be an ID, UUID, or the value.
'''
tags = []
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
attribute_identifier in a.value.split('|'))):
tags += a.tags
return tags
def add_attribute_tag(self, tag, attribute_identifier):
'''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:
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
attribute_identifier in a.value.split('|'))):
a.add_tag(tag)
attributes.append(a)
if not attributes:
raise Exception('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):
"""Delete an attribute, you can search by ID or UUID"""
found = False
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()
found = True
break
if not found:
raise Exception('No attribute with UUID/ID {} found.'.format(attribute_id))
def add_attribute(self, type, value, **kwargs):
"""Add an attribute. type and value are required but you can pass all
other parameters supported by MISPAttribute"""
if isinstance(value, list):
for a in value:
self.add_attribute(type=type, value=a, **kwargs)
else:
attribute = MISPAttribute()
attribute.from_dict(type=type, value=value, **kwargs)
self.attributes.append(attribute)
self.edited = True
def get_object_by_id(self, object_id):
"""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 exists in ths event'.format(object_id))
def add_object(self, obj=None, **kwargs):
"""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
def __repr__(self):
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):
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
@deprecated
def get_known_types(self): # pragma: no cover
return self.known_types
@deprecated
def set_all_values(self, **kwargs): # pragma: no cover
self.from_dict(**kwargs)
@deprecated
def _json(self): # pragma: no cover
return self.to_dict()
class MISPObjectReference(AbstractMISP):
def __init__(self):
super(MISPObjectReference, self).__init__()
def from_dict(self, object_uuid, referenced_uuid, relationship_type, comment=None, **kwargs):
self.object_uuid = object_uuid
self.referenced_uuid = referenced_uuid
self.relationship_type = relationship_type
self.comment = comment
super(MISPObjectReference, self).from_dict(**kwargs)
def __repr__(self):
if hasattr(self, 'referenced_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 MISPUser(AbstractMISP):
def __init__(self):
super(MISPUser, self).__init__()
class MISPOrganisation(AbstractMISP):
def __init__(self):
super(MISPOrganisation, self).__init__()
class MISPSighting(AbstractMISP):
def __init__(self):
super(MISPSighting, self).__init__()
def from_dict(self, value=None, uuid=None, id=None, source=None, type=None, timestamp=None, **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
"""
self.value = value
self.uuid = uuid
self.id = id
self.source = source
self.type = type
self.timestamp = timestamp
super(MISPSighting, self).from_dict(**kwargs)
def __repr__(self):
if hasattr(self, 'value'):
return '<{self.__class__.__name__}(value={self.value})'.format(self=self)
if hasattr(self, 'id'):
return '<{self.__class__.__name__}(value={self.id})'.format(self=self)
if hasattr(self, 'uuid'):
return '<{self.__class__.__name__}(value={self.uuid})'.format(self=self)
return '<{self.__class__.__name__}(NotInitialized)'.format(self=self)
class MISPObjectAttribute(MISPAttribute):
def __init__(self, definition):
super(MISPObjectAttribute, self).__init__()
self.__definition = definition
def from_dict(self, object_relation, value, **kwargs):
self.object_relation = object_relation
self.value = value
# 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')
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')
super(MISPObjectAttribute, self).from_dict(**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 MISPShadowAttribute(MISPAttribute):
def __init__(self):
super(MISPShadowAttribute, self).__init__()
class MISPObject(AbstractMISP):
def __init__(self, name, strict=False, standalone=False, default_attributes_parameters={}, **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(MISPObject, self).__init__(**kwargs)
self.__strict = strict
self.name = name
misp_objects_path = os.path.join(
os.path.abspath(os.path.dirname(sys.modules['pymisp'].__file__)),
'data', 'misp-objects', 'objects')
misp_objects_path_custom = kwargs.get('misp_objects_path_custom')
if misp_objects_path_custom and os.path.exists(os.path.join(misp_objects_path_custom, self.name, 'definition.json')):
# Use the local object path by default if provided (allows to overwrite a default template)
template_path = os.path.join(misp_objects_path_custom, self.name, 'definition.json')
self.__known_template = True
elif os.path.exists(os.path.join(misp_objects_path, self.name, 'definition.json')):
template_path = os.path.join(misp_objects_path, self.name, 'definition.json')
self.__known_template = True
else:
if self.__strict:
raise UnknownMISPObjectTemplate('{} is unknown in the MISP object directory.'.format(self.name))
else:
self.__known_template = False
if self.__known_template:
with open(template_path, 'r') as f:
self.__definition = json.load(f)
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']
else:
# Then we have no meta-category, template_uuid, description and template_version
pass
self.uuid = str(uuid.uuid4())
self.__fast_attribute_access = defaultdict(list) # Hashtable object_relation: [attributes]
self.ObjectReference = []
self.Attribute = []
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 = self._default_attributes_parameters.get('distribution', 5)
self.sharing_group_id = 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')
@property
def attributes(self):
return self.Attribute
@attributes.setter
def attributes(self, attributes):
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):
return self.ObjectReference
@references.setter
def references(self, references):
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 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 kwargs.get('Attribute'):
for a in kwargs.pop('Attribute'):
self.add_attribute(**a)
if kwargs.get('ObjectReference'):
for r in kwargs.pop('ObjectReference'):
self.add_reference(**r)
# 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(MISPObject, self).from_dict(**kwargs)
def add_reference(self, referenced_uuid, relationship_type, comment=None, **kwargs):
"""Add a link (uuid) to an other object"""
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
def get_attributes_by_relation(self, object_relation):
'''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):
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):
'''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, **value):
"""Add an attribute. object_relation is required and the value key is a
dictionary with all the keys supported by MISPAttribute"""
if value.get('value') is None:
return None
if self.__known_template:
if self.__definition['attributes'].get(object_relation):
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))
self.__fast_attribute_access[object_relation].append(attribute)
self.Attribute.append(attribute)
self.edited = True
return attribute
def to_dict(self, strict=False):
if strict or self.__strict and self.__known_template:
self._validate()
return super(MISPObject, self).to_dict()
def to_json(self, strict=False):
if strict or self.__strict and self.__known_template:
self._validate()
return super(MISPObject, self).to_json()
def _validate(self):
"""Make sure the object we're creating has the required fields"""
if self.__definition.get('required'):
required_missing = set(self.__definition.get('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):
if hasattr(self, 'name'):
return '<{self.__class__.__name__}(name={self.name})'.format(self=self)
return '<{self.__class__.__name__}(NotInitialized)'.format(self=self)