add: [sshd] MISP export initial commit - python OK - Go untested
Jean-Louis Huynen
parent
f69c9348da
commit
34904b3796
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#!/usr/bin/env python3
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import time
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from pymisp.tools.abstractgenerator import AbstractMISPObjectGenerator
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class AuthFailureMISPObject(AbstractMISPObjectGenerator):
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def __init__(self, dico_val, **kargs):
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self._dico_val = dico_val
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# Enforce attribute date with timestamp
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super(AuthFailureMISPObject, self).__init__('authentication-failure-report',
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default_attributes_parameters={'timestamp': int(time.time())},
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**kargs)
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self.name = "authentication-failure-report"
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self.generate_attributes()
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def generate_attributes(self):
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valid_object_attributes = self._definition['attributes'].keys()
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for object_relation, value in self._dico_val.items():
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if object_relation not in valid_object_attributes:
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continue
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if object_relation == 'timestamp':
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# Date already in ISO format, removing trailing Z
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value = value.rstrip('Z')
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if isinstance(value, dict):
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self.add_attribute(object_relation, **value)
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else:
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# uniformize value, sometimes empty array
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if isinstance(value, list) and len(value) == 0:
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value = ''
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self.add_attribute(object_relation, value=value)
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#!/usr/bin/env python3
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# -*- coding: utf-8 -*-
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import argparse
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import datetime
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import json
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import sys
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import time
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import redis
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import settings
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from generator import FeedGenerator
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def beautyful_sleep(sleep, additional):
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length = 20
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sleeptime = float(sleep) / float(length)
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for i in range(length):
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temp_string = '|'*i + ' '*(length-i-1)
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print('sleeping [{}]\t{}'.format(temp_string, additional), end='\r', sep='')
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sys.stdout.flush()
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time.sleep(sleeptime)
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class RedisToMISPFeed:
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SUFFIX_SIGH = '_sighting'
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SUFFIX_ATTR = '_attribute'
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SUFFIX_OBJ = '_object'
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SUFFIX_NO = ''
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SUFFIX_LIST = [SUFFIX_SIGH, SUFFIX_ATTR, SUFFIX_OBJ, SUFFIX_NO]
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def __init__(self):
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self.host = settings.host
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self.port = settings.port
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self.db = settings.db
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self.serv = redis.StrictRedis(self.host, self.port, self.db, decode_responses=True)
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self.generator = FeedGenerator()
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self.keynames = []
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for k in settings.keyname_pop:
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for s in self.SUFFIX_LIST:
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self.keynames.append(k+s)
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self.keynameError = settings.keyname_error
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self.update_last_action("Init system")
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def consume(self):
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self.update_last_action("Started consuming redis")
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while True:
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for key in self.keynames:
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while True:
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data = self.pop(key)
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if data is None:
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break
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try:
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self.perform_action(key, data)
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except Exception as error:
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self.save_error_to_redis(error, data)
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try:
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beautyful_sleep(5, self.format_last_action())
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except KeyboardInterrupt:
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sys.exit(130)
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def pop(self, key):
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popped = self.serv.rpop(key)
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if popped is None:
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return None
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try:
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popped = json.loads(popped)
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except ValueError as error:
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self.save_error_to_redis(error, popped)
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except ValueError as error:
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self.save_error_to_redis(error, popped)
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return popped
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def perform_action(self, key, data):
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# sighting
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if key.endswith(self.SUFFIX_SIGH):
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if self.generator.add_sighting_on_attribute():
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self.update_last_action("Added sighting")
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else:
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self.update_last_action("Error while adding sighting")
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# attribute
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elif key.endswith(self.SUFFIX_ATTR):
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attr_type = data.pop('type')
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attr_value = data.pop('value')
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if self.generator.add_attribute_to_event(attr_type, attr_value, **data):
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self.update_last_action("Added attribute")
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else:
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self.update_last_action("Error while adding attribute")
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# object
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elif key.endswith(self.SUFFIX_OBJ):
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# create the MISP object
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obj_name = data.pop('name')
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if self.generator.add_object_to_event(obj_name, **data):
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self.update_last_action("Added object")
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else:
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self.update_last_action("Error while adding object")
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else:
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# Suffix not provided, try to add anyway
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if settings.fallback_MISP_type == 'attribute':
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new_key = key + self.SUFFIX_ATTR
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# Add atribute type from the config
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if 'type' not in data and settings.fallback_attribute_type:
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data['type'] = settings.fallback_attribute_type
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else:
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new_key = None
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elif settings.fallback_MISP_type == 'object':
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new_key = key + self.SUFFIX_OBJ
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# Add object template name from the config
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if 'name' not in data and settings.fallback_object_template_name:
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data['name'] = settings.fallback_object_template_name
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else:
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new_key = None
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elif settings.fallback_MISP_type == 'sighting':
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new_key = key + self.SUFFIX_SIGH
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else:
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new_key = None
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if new_key is None:
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self.update_last_action("Redis key suffix not supported and automatic not configured")
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else:
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self.perform_action(new_key, data)
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# OTHERS
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def update_last_action(self, action):
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self.last_action = action
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self.last_action_time = datetime.datetime.now()
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def format_last_action(self):
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return "Last action: [{}] @ {}".format(
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self.last_action,
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self.last_action_time.isoformat().replace('T', ' '),
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)
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def save_error_to_redis(self, error, item):
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to_push = {'error': str(error), 'item': str(item)}
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print('Error:', str(error), '\nOn adding:', item)
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self.serv.lpush(self.keynameError, to_push)
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if __name__ == '__main__':
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parser = argparse.ArgumentParser(description="Pop item fom redis and add "
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+ "it to the MISP feed. By default, each action are pushed into a "
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+ "daily named event. Configuration taken from the file settings.py.")
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args = parser.parse_args()
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redisToMISP = RedisToMISPFeed()
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redisToMISP.consume()
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#!/usr/bin/env python3
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import datetime
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import hashlib
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import json
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import os
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import sys
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import time
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import uuid
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import pdb
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from pymisp import MISPEvent
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import settings
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def get_system_templates():
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"""Fetch all MISP-Object template present on the local system.
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Returns:
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dict: A dictionary listing all MISP-Object templates
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"""
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misp_objects_path = os.path.join(
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os.path.abspath(os.path.dirname(sys.modules['pymisp'].__file__)),
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'data', 'misp-objects', 'objects')
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templates = {}
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for root, dirs, files in os.walk(misp_objects_path, topdown=False):
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for def_file in files:
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obj_name = root.split('/')[-1]
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template_path = os.path.join(root, def_file)
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with open(template_path, 'r') as f:
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definition = json.load(f)
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templates[obj_name] = definition
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return templates
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def gen_uuid():
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"""Generate a random UUID and returns its string representation"""
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return str(uuid.uuid4())
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class FeedGenerator:
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"""Helper object to create MISP feed.
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Configuration taken from the file settings.py"""
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def __init__(self):
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"""This object can be use to easily create a daily MISP-feed.
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It handles the event creation, manifest file and cache file
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(hashes.csv).
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"""
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self.sys_templates = get_system_templates()
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self.constructor_dict = settings.constructor_dict
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self.flushing_interval = settings.flushing_interval
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self.flushing_next = time.time() + self.flushing_interval
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self.manifest = {}
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self.attributeHashes = []
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self.daily_event_name = settings.daily_event_name + ' {}'
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event_date_str, self.current_event_uuid, self.event_name = self.get_last_event_from_manifest()
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temp = [int(x) for x in event_date_str.split('-')]
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self.current_event_date = datetime.date(temp[0], temp[1], temp[2])
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self.current_event = self._get_event_from_id(self.current_event_uuid)
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def add_sighting_on_attribute(self, sight_type, attr_uuid, **data):
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"""Add a sighting on an attribute.
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Not supported for the moment."""
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self.update_daily_event_id()
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self._after_addition()
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return False
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def add_attribute_to_event(self, attr_type, attr_value, **attr_data):
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"""Add an attribute to the daily event"""
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self.update_daily_event_id()
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self.current_event.add_attribute(attr_type, attr_value, **attr_data)
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self._add_hash(attr_type, attr_value)
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self._after_addition()
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return True
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def add_object_to_event(self, obj_name, **data):
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"""Add an object to the daily event"""
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self.update_daily_event_id()
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if obj_name not in self.sys_templates:
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print('Unkown object template')
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return False
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# Get MISP object constructor
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obj_constr = self.constructor_dict.get(obj_name, None)
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pdb.set_trace()
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# Constructor not known, using the generic one
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if obj_constr is None:
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obj_constr = self.constructor_dict.get('generic')
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misp_object = obj_constr(obj_name)
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# Fill generic object
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for k, v in data.items():
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# attribute is not in the object template definition
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if k not in self.sys_templates[obj_name]['attributes']:
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# add it with type text
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misp_object.add_attribute(k, **{'value': v, 'type': 'text'})
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else:
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misp_object.add_attribute(k, **{'value': v})
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else:
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misp_object = obj_constr(data)
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self.current_event.add_object(misp_object)
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for attr_type, attr_value in data.items():
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self._add_hash(attr_type, attr_value)
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self._after_addition()
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return True
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def _after_addition(self):
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"""Write event on disk"""
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now = time.time()
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if self.flushing_next <= now:
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self.flush_event()
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self.flushing_next = now + self.flushing_interval
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# Cache
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def _add_hash(self, attr_type, attr_value):
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if ('|' in attr_type or attr_type == 'malware-sample'):
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split = attr_value.split('|')
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self.attributeHashes.append([
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hashlib.md5(str(split[0]).encode("utf-8")).hexdigest(),
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self.current_event_uuid
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])
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self.attributeHashes.append([
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hashlib.md5(str(split[1]).encode("utf-8")).hexdigest(),
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self.current_event_uuid
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])
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else:
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self.attributeHashes.append([
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hashlib.md5(str(attr_value).encode("utf-8")).hexdigest(),
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self.current_event_uuid
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])
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# Manifest
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def _init_manifest(self):
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# check if outputdir exists and try to create it if not
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if not os.path.exists(settings.outputdir):
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try:
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os.makedirs(settings.outputdir)
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except PermissionError as error:
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print(error)
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print("Please fix the above error and try again.")
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sys.exit(126)
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# create an empty manifest
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try:
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with open(os.path.join(settings.outputdir, 'manifest.json'), 'w'):
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pass
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except PermissionError as error:
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print(error)
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print("Please fix the above error and try again.")
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sys.exit(126)
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# create new event and save manifest
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self.create_daily_event()
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def flush_event(self, new_event=None):
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print('Writting event on disk'+' '*50)
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if new_event is not None:
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event_uuid = new_event['uuid']
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event = new_event
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else:
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event_uuid = self.current_event_uuid
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event = self.current_event
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eventFile = open(os.path.join(settings.outputdir, event_uuid+'.json'), 'w')
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eventFile.write(event.to_json())
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eventFile.close()
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self.save_hashes()
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def save_manifest(self):
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try:
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manifestFile = open(os.path.join(settings.outputdir, 'manifest.json'), 'w')
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manifestFile.write(json.dumps(self.manifest))
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manifestFile.close()
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print('Manifest saved')
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except Exception as e:
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print(e)
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sys.exit('Could not create the manifest file.')
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def save_hashes(self):
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if len(self.attributeHashes) == 0:
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return False
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try:
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hashFile = open(os.path.join(settings.outputdir, 'hashes.csv'), 'a')
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for element in self.attributeHashes:
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hashFile.write('{},{}\n'.format(element[0], element[1]))
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hashFile.close()
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self.attributeHashes = []
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print('Hash saved' + ' '*30)
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except Exception as e:
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print(e)
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sys.exit('Could not create the quick hash lookup file.')
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def _addEventToManifest(self, event):
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event_dict = event.to_dict()
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tags = []
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for eventTag in event_dict.get('EventTag', []):
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tags.append({'name': eventTag['Tag']['name'],
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'colour': eventTag['Tag']['colour']})
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return {
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'Orgc': event_dict.get('Orgc', []),
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'Tag': tags,
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'info': event_dict['info'],
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'date': event_dict['date'],
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'analysis': event_dict['analysis'],
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'threat_level_id': event_dict['threat_level_id'],
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'timestamp': event_dict.get('timestamp', int(time.time()))
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}
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def get_last_event_from_manifest(self):
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"""Retreive last event from the manifest.
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If the manifest doesn't exists or if it is empty, initialize it.
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"""
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try:
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manifest_path = os.path.join(settings.outputdir, 'manifest.json')
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with open(manifest_path, 'r') as f:
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man = json.load(f)
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dated_events = []
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for event_uuid, event_json in man.items():
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# add events to manifest
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self.manifest[event_uuid] = event_json
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dated_events.append([
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event_json['date'],
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event_uuid,
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event_json['info']
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])
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# Sort by date then by event name
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dated_events.sort(key=lambda k: (k[0], k[2]), reverse=True)
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return dated_events[0]
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except FileNotFoundError as e:
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print('Manifest not found, generating a fresh one')
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self._init_manifest()
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return self.get_last_event_from_manifest()
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# DAILY
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def update_daily_event_id(self):
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if self.current_event_date != datetime.date.today(): # create new event
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# save current event on disk
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self.flush_event()
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self.current_event = self.create_daily_event()
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self.current_event_date = datetime.date.today()
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self.current_event_uuid = self.current_event.get('uuid')
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self.event_name = self.current_event.info
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def _get_event_from_id(self, event_uuid):
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with open(os.path.join(settings.outputdir, '%s.json' % event_uuid), 'r') as f:
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event_dict = json.load(f)
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event = MISPEvent()
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event.from_dict(**event_dict)
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return event
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def create_daily_event(self):
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new_uuid = gen_uuid()
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today = str(datetime.date.today())
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event_dict = {
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'uuid': new_uuid,
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'id': len(self.manifest)+1,
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'Tag': settings.Tag,
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'info': self.daily_event_name.format(today),
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'analysis': settings.analysis, # [0-2]
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'threat_level_id': settings.threat_level_id, # [1-4]
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'published': settings.published,
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'date': today
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}
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event = MISPEvent()
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event.from_dict(**event_dict)
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# reference org
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org_dict = {}
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org_dict['name'] = settings.org_name
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org_dict['uuid'] = settings.org_uuid
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event['Orgc'] = org_dict
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# save event on disk
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self.flush_event(new_event=event)
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||||
# add event to manifest
|
||||
self.manifest[event['uuid']] = self._addEventToManifest(event)
|
||||
self.save_manifest()
|
||||
return event
|
||||
|
|
@ -0,0 +1,4 @@
|
|||
#!/bin/bash
|
||||
virtualenv -p python3 serv-env
|
||||
. ./serv-env/bin/activate
|
||||
pip3 install -U flask Flask-AutoIndex redis
|
||||
|
|
@ -0,0 +1,12 @@
|
|||
#!/usr/bin/env python3
|
||||
|
||||
import os.path
|
||||
from flask import Flask
|
||||
from flask_autoindex import AutoIndex
|
||||
from settings import outputdir
|
||||
|
||||
app = Flask(__name__)
|
||||
AutoIndex(app, browse_root=os.path.join(os.path.curdir, outputdir))
|
||||
|
||||
if __name__ == '__main__':
|
||||
app.run(host='0.0.0.0')
|
||||
|
|
@ -0,0 +1,65 @@
|
|||
""" REDIS RELATED """
|
||||
# Your redis server
|
||||
host='127.0.0.1'
|
||||
port=6385
|
||||
db=3
|
||||
## The keynames to POP element from
|
||||
keyname_pop=['authf']
|
||||
|
||||
# OTHERS
|
||||
## If key prefix not provided, data will be added as either object, attribute or sighting
|
||||
fallback_MISP_type = 'object'
|
||||
### How to handle the fallback
|
||||
fallback_object_template_name = 'generic' # MISP-Object only
|
||||
fallback_attribute_category = 'comment' # MISP-Attribute only
|
||||
|
||||
## How frequent the event should be written on disk
|
||||
#flushing_interval=5*60
|
||||
flushing_interval=15
|
||||
## The redis list keyname in which to put items that generated an error
|
||||
keyname_error='feed-generation-error'
|
||||
|
||||
""" FEED GENERATOR CONFIGURATION """
|
||||
|
||||
# The output dir for the feed. This will drop a lot of files, so make
|
||||
# sure that you use a directory dedicated to the feed
|
||||
outputdir = 'output'
|
||||
|
||||
# Event meta data
|
||||
## Required
|
||||
### The organisation id that generated this feed
|
||||
org_name='myOrg'
|
||||
### Your organisation UUID
|
||||
org_uuid=''
|
||||
### The daily event name to be used in MISP.
|
||||
### (e.g. honeypot_1, will produce each day an event of the form honeypot_1 dd-mm-yyyy)
|
||||
daily_event_name='PyMISP default event name'
|
||||
|
||||
## Optional
|
||||
analysis=0
|
||||
threat_level_id=3
|
||||
published=False
|
||||
Tag=[
|
||||
{
|
||||
"colour": "#ffffff",
|
||||
"name": "tlp:white"
|
||||
},
|
||||
{
|
||||
"colour": "#ff00ff",
|
||||
"name": "my:custom:feed"
|
||||
}
|
||||
]
|
||||
|
||||
# MISP Object constructor
|
||||
from ObjectConstructor.AuthFailureMISPObject import AuthFailureMISPObject
|
||||
#from pymisp.pymisp.tools import GenericObjectGenerator
|
||||
from pymisp.tools import GenericObjectGenerator
|
||||
|
||||
constructor_dict = {
|
||||
'authentication-failure-report': AuthFailureMISPObject,
|
||||
'generic': GenericObjectGenerator
|
||||
}
|
||||
|
||||
# Others
|
||||
## Redis pooling time
|
||||
sleep=60
|
||||
|
|
@ -20,6 +20,7 @@ type (
|
|||
SetReader(io.Reader)
|
||||
Pull(chan error)
|
||||
Flush() error
|
||||
MISPexport() error
|
||||
}
|
||||
|
||||
// CompilerStruct will implements Compiler, and should be embedded in
|
||||
|
|
|
|||
|
|
@ -39,6 +39,12 @@ type GrokedSSHD struct {
|
|||
SshdInvalidUser string `json:"sshd_invalid_user"`
|
||||
}
|
||||
|
||||
type MISP_auth_failure_sshd_username struct {
|
||||
mtype string `json:"type"`
|
||||
username string `json:"username"`
|
||||
total string `json:"total"`
|
||||
}
|
||||
|
||||
// Flush recomputes statistics and recompile HTML output
|
||||
// TODO : review after refacto
|
||||
func (s *SSHDCompiler) Flush() error {
|
||||
|
|
@ -523,6 +529,36 @@ func csvStats(s *SSHDCompiler, v string) error {
|
|||
return nil
|
||||
}
|
||||
|
||||
func MISPexport(s *SSHDCompiler) error {
|
||||
|
||||
today := time.Now()
|
||||
dstr := fmt.Sprintf("%v%v%v", today.Year(), fmt.Sprintf("%02d", int(today.Month())), fmt.Sprintf("%02d", int(today.Day())))
|
||||
|
||||
r0 := *s.r0
|
||||
r1 := *s.r1
|
||||
zrank, err := redis.Strings(r0.Do("ZRANGEBYSCORE", fmt.Sprintf("%q:statsusername", dstr), "-inf", "+inf", "WITHSCORES"))
|
||||
if err != nil {
|
||||
return err
|
||||
}
|
||||
|
||||
mispobject := new(MISP_auth_failure_sshd_username)
|
||||
mispobject.mtype = "sshd"
|
||||
for k, v := range zrank {
|
||||
// pair: keys
|
||||
if (k % 2) == 0 {
|
||||
mispobject.username = v
|
||||
// even: values
|
||||
} else {
|
||||
mispobject.total = v
|
||||
}
|
||||
}
|
||||
|
||||
b, err := json.Marshal(mispobject)
|
||||
r1.Do("LPUSH", "authf_object", b)
|
||||
|
||||
return nil
|
||||
}
|
||||
|
||||
func plotStats(s *SSHDCompiler, v string) error {
|
||||
r := *s.r0
|
||||
zrank, err := redis.Strings(r.Do("ZRANGEBYSCORE", v, "-inf", "+inf", "WITHSCORES"))
|
||||
|
|
|
|||
Loading…
Reference in New Issue