PyMISP/pymisp/api.py

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#!/usr/bin/env python
# -*- coding: utf-8 -*-
""" Python API using the REST interface of MISP """
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import json
import datetime
import os
import base64
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import re
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try:
from urllib.parse import urljoin
except ImportError:
from urlparse import urljoin
from io import BytesIO
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import zipfile
import warnings
import functools
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try:
import requests
HAVE_REQUESTS = True
except ImportError:
HAVE_REQUESTS = False
from . import __version__
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# Least dirty way to support python 2 and 3
try:
basestring
except NameError:
basestring = str
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class PyMISPError(Exception):
def __init__(self, message):
super(PyMISPError, self).__init__(message)
self.message = message
class NewEventError(PyMISPError):
pass
class NewAttributeError(PyMISPError):
pass
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class MissingDependency(PyMISPError):
pass
class NoURL(PyMISPError):
pass
class NoKey(PyMISPError):
pass
def deprecated(func):
'''This is a decorator which can be used to mark functions
as deprecated. It will result in a warning being emitted
when the function is used.'''
@functools.wraps(func)
def new_func(*args, **kwargs):
warnings.warn_explicit(
"Call to deprecated function {}.".format(func.__name__),
category=DeprecationWarning,
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filename=func.__code__.co_filename,
lineno=func.__code__.co_firstlineno + 1
)
return func(*args, **kwargs)
return new_func
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class PyMISP(object):
"""
Python API for MISP
:param url: URL of the MISP instance you want to connect to
:param key: API key of the user you want to use
:param ssl: can be True or False (to check ot not the validity
of the certificate. Or a CA_BUNDLE in case of self
signed certiifcate (the concatenation of all the
*.crt of the chain)
:param out_type: Type of object (json or xml)
"""
def __init__(self, url, key, ssl=True, out_type='json'):
if not url:
raise NoURL('Please provide the URL of your MISP instance.')
if not key:
raise NoKey('Please provide your authorization key.')
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self.root_url = url
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self.key = key
self.ssl = ssl
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self.out_type = out_type
self.categories = ['Internal reference', 'Targeting data', 'Antivirus detection',
'Payload delivery', 'Payload installation', 'Artifacts dropped',
'Persistence mechanism', 'Network activity', 'Payload type',
'Attribution', 'External analysis', 'Other']
self.types = ['md5', 'sha1', 'sha256', 'filename', 'filename|md5', 'filename|sha1',
'filename|sha256', 'ip-src', 'ip-dst', 'hostname', 'domain', 'url',
'user-agent', 'http-method', 'regkey', 'regkey|value', 'AS', 'snort',
'pattern-in-file', 'pattern-in-traffic', 'pattern-in-memory', 'named pipe', 'mutex',
'vulnerability', 'attachment', 'malware-sample', 'link', 'comment', 'text', 'other']
try:
# Make sure the MISP instance is working and the URL is valid
self.get_version()
except Exception as e:
raise PyMISPError('Unable to connect to MISP ({}). Please make sure the API key and the URL are correct (http/https is required): {}'.format(self.root_url, e))
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def __prepare_session(self, force_out=None):
"""
Prepare the headers of the session
:param force_out: force the type of the expect output
(overwrite the constructor)
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"""
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if not HAVE_REQUESTS:
raise MissingDependency('Missing dependency, install requests (`pip install requests`)')
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if force_out is not None:
out = force_out
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else:
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out = self.out_type
session = requests.Session()
session.verify = self.ssl
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session.headers.update(
{'Authorization': self.key,
'Accept': 'application/' + out,
'content-type': 'application/' + out})
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return session
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def _check_response(self, response):
if response.status_code >= 500:
response.raise_for_status()
to_return = response.json()
if 400 <= response.status_code < 500:
if to_return.get('error') is None:
to_return['error'] = to_return.get('message')
return to_return
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# ################################################
# ############### Simple REST API ################
# ################################################
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def get_index(self, force_out=None):
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"""
Return the index.
Warning, there's a limit on the number of results
"""
session = self.__prepare_session(force_out)
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url = urljoin(self.root_url, 'events')
return session.get(url)
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def get_event(self, event_id, force_out=None):
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"""
Get an event
:param event_id: Event id to get
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"""
session = self.__prepare_session(force_out)
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url = urljoin(self.root_url, 'events/{}'.format(event_id))
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return session.get(url)
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def add_event(self, event, force_out=None):
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"""
Add a new event
:param event: Event as JSON object / string or XML to add
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"""
session = self.__prepare_session(force_out)
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url = urljoin(self.root_url, 'events')
if self.out_type == 'json':
if isinstance(event, basestring):
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return session.post(url, data=event)
else:
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return session.post(url, data=json.dumps(event))
else:
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return session.post(url, data=event)
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def update_event(self, event_id, event, force_out=None):
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"""
Update an event
:param event_id: Event id to update
:param event: Event as JSON object / string or XML to add
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"""
session = self.__prepare_session(force_out)
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url = urljoin(self.root_url, 'events/{}'.format(event_id))
if self.out_type == 'json':
if isinstance(event, basestring):
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return session.post(url, data=event)
else:
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return session.post(url, data=json.dumps(event))
else:
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return session.post(url, data=event)
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def delete_event(self, event_id, force_out=None):
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"""
Delete an event
:param event_id: Event id to delete
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"""
session = self.__prepare_session(force_out)
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url = urljoin(self.root_url, 'events/{}'.format(event_id))
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return session.delete(url)
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def delete_attribute(self, attribute_id, force_out=None):
session = self.__prepare_session(force_out)
url = urljoin(self.root_url, 'attributes/{}'.format(attribute_id))
return session.delete(url)
# ##############################################
# ######### Event handling (Json only) #########
# ##############################################
def _prepare_full_event(self, distribution, threat_level_id, analysis, info, date=None, published=False):
to_return = {'Event': {}}
# Setup details of a new event
if distribution not in [0, 1, 2, 3]:
raise NewEventError('{} is invalid, the distribution has to be in 0, 1, 2, 3'.format(distribution))
if threat_level_id not in [1, 2, 3, 4]:
raise NewEventError('{} is invalid, the threat_level_id has to be in 1, 2, 3, 4'.format(threat_level_id))
if analysis not in [0, 1, 2]:
raise NewEventError('{} is invalid, the analysis has to be in 0, 1, 2'.format(analysis))
if date is None:
date = datetime.date.today().isoformat()
if published not in [True, False]:
raise NewEventError('{} is invalid, published has to be True or False'.format(published))
to_return['Event'] = {'distribution': distribution, 'info': info, 'date': date, 'published': published,
'threat_level_id': threat_level_id, 'analysis': analysis}
return to_return
def _prepare_full_attribute(self, category, type_value, value, to_ids, comment=None, distribution=None):
to_return = {}
if category not in self.categories:
raise NewAttributeError('{} is invalid, category has to be in {}'.format(category, (', '.join(self.categories))))
to_return['category'] = category
if type_value not in self.types:
raise NewAttributeError('{} is invalid, type_value has to be in {}'.format(type_value, (', '.join(self.types))))
to_return['type'] = type_value
if to_ids not in [True, False]:
raise NewAttributeError('{} is invalid, to_ids has to be True or False'.format(to_ids))
to_return['to_ids'] = to_ids
if distribution is not None:
distribution = int(distribution)
# If None: take the default value of the event
if distribution not in [None, 0, 1, 2, 3]:
raise NewAttributeError('{} is invalid, the distribution has to be in 0, 1, 2, 3 or None'.format(distribution))
if distribution is not None:
to_return['distribution'] = distribution
to_return['value'] = value
if comment is not None:
to_return['comment'] = comment
return to_return
def _prepare_update(self, event):
# Cleanup the received event to make it publishable
event['Event'].pop('locked', None)
event['Event'].pop('attribute_count', None)
event['Event'].pop('RelatedEvent', None)
event['Event'].pop('orgc', None)
event['Event'].pop('ShadowAttribute', None)
event['Event'].pop('org', None)
event['Event'].pop('proposal_email_lock', None)
event['Event'].pop('publish_timestamp', None)
event['Event'].pop('published', None)
event['Event'].pop('timestamp', None)
event['Event']['id'] = int(event['Event']['id'])
return event
# ########## Helpers ##########
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def get(self, eid):
response = self.get_event(int(eid), 'json')
return self._check_response(response)
def update(self, event):
eid = event['Event']['id']
response = self.update_event(eid, event, 'json')
return self._check_response(response)
def new_event(self, distribution=None, threat_level_id=None, analysis=None, info=None, date=None, published=False):
data = self._prepare_full_event(distribution, threat_level_id, analysis, info, date, published)
response = self.add_event(data, 'json')
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return self._check_response(response)
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def publish(self, event):
if event['Event']['published']:
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return {'error': 'Already published'}
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event = self._prepare_update(event)
event['Event']['published'] = True
response = self.update_event(event['Event']['id'], event, 'json')
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return self._check_response(response)
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# ##### File attributes #####
def _send_attributes(self, event, attributes):
event = self._prepare_update(event)
for a in attributes:
if a.get('distribution') is None:
a['distribution'] = event['Event']['distribution']
event['Event']['Attribute'] = attributes
response = self.update_event(event['Event']['id'], event, 'json')
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return self._check_response(response)
def add_hashes(self, event, category='Artifacts dropped', filename=None, md5=None, sha1=None, sha256=None, comment=None, to_ids=True, distribution=None):
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categories = ['Payload delivery', 'Artifacts dropped', 'Payload installation', 'External analysis']
if category not in categories:
raise NewAttributeError('{} is invalid, category has to be in {}'.format(category, (', '.join(categories))))
attributes = []
type_value = '{}'
value = '{}'
if filename:
type_value = 'filename|{}'
value = filename + '|{}'
if md5:
attributes.append(self._prepare_full_attribute(category, type_value.format('md5'), value.format(md5),
to_ids, comment, distribution))
if sha1:
attributes.append(self._prepare_full_attribute(category, type_value.format('sha1'), value.format(sha1),
to_ids, comment, distribution))
if sha256:
attributes.append(self._prepare_full_attribute(category, type_value.format('sha256'), value.format(sha256),
to_ids, comment, distribution))
return self._send_attributes(event, attributes)
def add_regkey(self, event, regkey, rvalue=None, category='Artifacts dropped', to_ids=True, comment=None, distribution=None):
type_value = '{}'
value = '{}'
if rvalue:
type_value = 'regkey|value'
value = '{}|{}'.format(regkey, rvalue)
else:
type_value = 'regkey'
value = regkey
attributes = []
attributes.append(self._prepare_full_attribute(category, type_value, value, to_ids, comment, distribution))
return self._send_attributes(event, attributes)
def add_pattern(self, event, pattern, in_file=True, in_memory=False, category='Artifacts dropped', to_ids=True, comment=None, distribution=None):
attributes = []
if in_file:
attributes.append(self._prepare_full_attribute(category, 'pattern-in-file', pattern, to_ids, comment, distribution))
if in_memory:
attributes.append(self._prepare_full_attribute(category, 'pattern-in-memory', pattern, to_ids, comment, distribution))
return self._send_attributes(event, attributes)
def add_pipe(self, event, named_pipe, category='Artifacts dropped', to_ids=True, comment=None, distribution=None):
attributes = []
if not named_pipe.startswith('\\.\\pipe\\'):
named_pipe = '\\.\\pipe\\{}'.format(named_pipe)
attributes.append(self._prepare_full_attribute(category, 'named pipe', named_pipe, to_ids, comment, distribution))
return self._send_attributes(event, attributes)
def add_mutex(self, event, mutex, category='Artifacts dropped', to_ids=True, comment=None, distribution=None):
attributes = []
if not mutex.startswith('\\BaseNamedObjects\\'):
mutex = '\\BaseNamedObjects\\{}'.format(mutex)
attributes.append(self._prepare_full_attribute(category, 'mutex', mutex, to_ids, comment, distribution))
return self._send_attributes(event, attributes)
# ##### Network attributes #####
def add_ipdst(self, event, ipdst, category='Network activity', to_ids=True, comment=None, distribution=None):
attributes = []
attributes.append(self._prepare_full_attribute(category, 'ip-dst', ipdst, to_ids, comment, distribution))
return self._send_attributes(event, attributes)
def add_hostname(self, event, hostname, category='Network activity', to_ids=True, comment=None, distribution=None):
attributes = []
attributes.append(self._prepare_full_attribute(category, 'hostname', hostname, to_ids, comment, distribution))
return self._send_attributes(event, attributes)
def add_domain(self, event, domain, category='Network activity', to_ids=True, comment=None, distribution=None):
attributes = []
attributes.append(self._prepare_full_attribute(category, 'domain', domain, to_ids, comment, distribution))
return self._send_attributes(event, attributes)
def add_url(self, event, url, category='Network activity', to_ids=True, comment=None, distribution=None):
attributes = []
attributes.append(self._prepare_full_attribute(category, 'url', url, to_ids, comment, distribution))
return self._send_attributes(event, attributes)
def add_useragent(self, event, useragent, category='Network activity', to_ids=True, comment=None, distribution=None):
attributes = []
attributes.append(self._prepare_full_attribute(category, 'user-agent', useragent, to_ids, comment, distribution))
return self._send_attributes(event, attributes)
def add_traffic_pattern(self, event, pattern, category='Network activity', to_ids=True, comment=None, distribution=None):
attributes = []
attributes.append(self._prepare_full_attribute(category, 'pattern-in-traffic', pattern, to_ids, comment, distribution))
return self._send_attributes(event, attributes)
def add_snort(self, event, snort, category='Network activity', to_ids=True, comment=None, distribution=None):
attributes = []
attributes.append(self._prepare_full_attribute(category, 'snort', snort, to_ids, comment, distribution))
return self._send_attributes(event, attributes)
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# ##################################################
# ######### Upload samples through the API #########
# ##################################################
def _create_event(self, distribution, threat_level_id, analysis, info):
# Setup details of a new event
if distribution not in [0, 1, 2, 3]:
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raise NewEventError('{} is invalid, the distribution has to be in 0, 1, 2, 3'.format(distribution))
if threat_level_id not in [0, 1, 2, 3]:
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raise NewEventError('{} is invalid, the threat_level_id has to be in 0, 1, 2, 3'.format(threat_level_id))
if analysis not in [0, 1, 2]:
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raise NewEventError('{} is invalid, the analysis has to be in 0, 1, 2'.format(analysis))
return {'distribution': int(distribution), 'info': info,
'threat_level_id': int(threat_level_id), 'analysis': analysis}
def prepare_attribute(self, event_id, distribution, to_ids, category, info,
analysis, threat_level_id):
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to_post = {'request': {}}
authorized_categs = ['Payload delivery', 'Artifacts dropped', 'Payload Installation', 'External Analysis']
if event_id is not None:
try:
event_id = int(event_id)
except:
pass
if not isinstance(event_id, int):
# New event
to_post['request'] = self._create_event(distribution, threat_level_id, analysis, info)
else:
to_post['request']['event_id'] = int(event_id)
if to_ids not in [True, False]:
raise NewAttributeError('{} is invalid, to_ids has to be True or False'.format(to_ids))
to_post['request']['to_ids'] = to_ids
if category not in authorized_categs:
raise NewAttributeError('{} is invalid, category has to be in {}'.format(category, (', '.join(authorized_categs))))
to_post['request']['category'] = category
return to_post
def _encode_file_to_upload(self, path):
with open(path, 'rb') as f:
return base64.b64encode(f.read())
def upload_sample(self, filename, filepath, event_id, distribution, to_ids,
category, info, analysis, threat_level_id):
to_post = self.prepare_attribute(event_id, distribution, to_ids, category,
info, analysis, threat_level_id)
to_post['request']['files'] = [{'filename': filename, 'data': self._encode_file_to_upload(filepath)}]
return self._upload_sample(to_post)
def upload_samplelist(self, filepaths, event_id, distribution, to_ids, category,
info, analysis, threat_level_id):
to_post = self.prepare_attribute(event_id, distribution, to_ids, category,
info, analysis, threat_level_id)
files = []
for path in filepaths:
if not os.path.isfile(path):
continue
files.append({'filename': os.path.basename(path), 'data': self._encode_file_to_upload(path)})
to_post['request']['files'] = files
return self._upload_sample(to_post)
def _upload_sample(self, to_post):
session = self.__prepare_session('json')
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url = urljoin(self.root_url, 'events/upload_sample')
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response = session.post(url, data=json.dumps(to_post))
return self._check_response(response)
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# ##############################
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# ######## REST Search #########
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# ##############################
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def __query(self, session, path, query):
if query.get('error') is not None:
return query
url = urljoin(self.root_url, 'events/{}'.format(path.lstrip('/')))
query = {'request': query}
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response = session.post(url, data=json.dumps(query))
return self._check_response(response)
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def search_all(self, value):
query = {'value': value, 'searchall': 1}
session = self.__prepare_session('json')
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return self.__query(session, 'restSearch/download', query)
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def __prepare_rest_search(self, values, not_values):
"""
Prepare a search, generate the chain processed by the server
:param values: Values to search
:param not_values: Values that should not be in the response
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"""
to_return = ''
if values is not None:
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if not isinstance(values, list):
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to_return += values
else:
to_return += '&&'.join(values)
if not_values is not None:
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if len(to_return) > 0:
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to_return += '&&!'
else:
to_return += '!'
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if not isinstance(values, list):
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to_return += not_values
else:
to_return += '&&!'.join(not_values)
return to_return
def search(self, values=None, not_values=None, type_attribute=None,
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category=None, org=None, tags=None, not_tags=None, date_from=None,
date_to=None, last=None):
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"""
Search via the Rest API
:param values: values to search for
:param not_values: values *not* to search for
:param type_attribute: Type of attribute
:param category: Category to search
:param org: Org reporting the event
:param tags: Tags to search for
:param not_tags: Tags *not* to search for
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:param date_from: First date
:param date_to: Last date
:param last: Last updated events (for example 5d or 12h or 30m)
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"""
val = self.__prepare_rest_search(values, not_values).replace('/', '|')
tag = self.__prepare_rest_search(tags, not_tags).replace(':', ';')
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query = {}
if len(val) != 0:
query['value'] = val
if len(tag) != 0:
query['tags'] = tag
if type_attribute is not None:
query['type'] = type_attribute
if category is not None:
query['category'] = category
if org is not None:
query['org'] = org
if date_from is not None:
if isinstance(date_from, datetime.date) or isinstance(date_to, datetime.datetime):
query['from'] = date_from.strftime('%Y-%m-%d')
else:
query['from'] = date_from
if date_to is not None:
if isinstance(date_to, datetime.date) or isinstance(date_to, datetime.datetime):
query['to'] = date_to.strftime('%Y-%m-%d')
else:
query['to'] = date_to
if last is not None:
query['last'] = last
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session = self.__prepare_session('json')
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return self.__query(session, 'restSearch/download', query)
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def get_attachement(self, event_id):
"""
Get attachement of an event (not sample)
:param event_id: Event id from where the attachements will
be fetched
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"""
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attach = urljoin(self.root_url, 'attributes/downloadAttachment/download/{}'.format(event_id))
session = self.__prepare_session('json')
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return session.get(attach)
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def get_yara(self, event_id):
to_post = {'request': {'eventid': event_id, 'type': 'yara'}}
session = self.__prepare_session('json')
response = session.post(urljoin(self.root_url, 'attributes/restSearch'), data=json.dumps(to_post))
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result = self._check_response(response)
if result.get('error') is not None:
return False, result.get('error')
if not result.get('response'):
return False, result.get('message')
rules = '\n\n'.join([a['value'] for a in result['response']['Attribute']])
return True, rules
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def download_samples(self, sample_hash=None, event_id=None, all_samples=False):
to_post = {'request': {'hash': sample_hash, 'eventID': event_id, 'allSamples': all_samples}}
session = self.__prepare_session('json')
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response = session.post(urljoin(self.root_url, 'attributes/downloadSample'), data=json.dumps(to_post))
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result = self._check_response(response)
if result.get('error') is not None:
return False, result.get('error')
if not result.get('result'):
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return False, result.get('message')
details = []
for f in result['result']:
decoded = base64.b64decode(f['base64'])
zipped = BytesIO(decoded)
try:
archive = zipfile.ZipFile(zipped)
try:
# New format
unzipped = BytesIO(archive.open(f['md5'], pwd='infected').read())
except KeyError:
# Old format
unzipped = BytesIO(archive.open(f['filename'], pwd='infected').read())
details.append([f['event_id'], f['filename'], unzipped])
except zipfile.BadZipfile:
# In case the sample isn't zipped
details.append([f['event_id'], f['filename'], zipped])
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return True, details
def download_last(self, last):
"""
Download the last updated events.
:param last: can be defined in days, hours, minutes (for example 5d or 12h or 30m)
"""
return self.search(last=last)
# ############## Suricata ###############
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def download_all_suricata(self):
"""
Download all suricata rules events.
"""
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suricata_rules = urljoin(self.root_url, 'events/nids/suricata/download')
session = self.__prepare_session('rules')
return session.get(suricata_rules)
def download_suricata_rule_event(self, event_id):
"""
Download one suricata rule event.
:param event_id: ID of the event to download (same as get)
"""
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template = urljoin(self.root_url, 'events/nids/suricata/download/{}'.format(event_id))
session = self.__prepare_session('rules')
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return session.get(template)
# ########## Version ##########
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def get_api_version(self):
"""
Returns the current version of PyMISP installed on the system
"""
return {'version': __version__}
def get_api_version_master(self):
"""
Get the most recent version of PyMISP from github
"""
r = requests.get('https://raw.githubusercontent.com/MISP/PyMISP/master/pymisp/__init__.py')
if r.status_code == 200:
version = re.findall("__version__ = '(.*)'", r.text)
return {'version': version[0]}
else:
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return {'error': 'Impossible to retrieve the version of the master branch.'}
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def get_version(self):
"""
Returns the version of the instance.
"""
session = self.__prepare_session('json')
url = urljoin(self.root_url, 'servers/getVersion')
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response = session.get(url)
return self._check_response(response)
def get_version_master(self):
"""
Get the most recent version from github
"""
r = requests.get('https://raw.githubusercontent.com/MISP/MISP/master/VERSION.json')
if r.status_code == 200:
master_version = json.loads(r.text)
return {'version': '{}.{}.{}'.format(master_version['major'], master_version['minor'], master_version['hotfix'])}
else:
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return {'error': 'Impossible to retrieve the version of the master branch.'}
# ############## Deprecated (Pure XML API should not be used) ##################
@deprecated
def download_all(self):
"""
Download all event from the instance
"""
xml = urljoin(self.root_url, 'events/xml/download')
session = self.__prepare_session('xml')
return session.get(xml)
@deprecated
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def download(self, event_id, with_attachement=False):
"""
Download one event in XML
:param event_id: Event id of the event to download (same as get)
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"""
if with_attachement:
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attach = 'true'
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else:
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attach = 'false'
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template = urljoin(self.root_url, 'events/xml/download/{}/{}'.format(event_id, attach))
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session = self.__prepare_session('xml')
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return session.get(template)