158 lines
6.0 KiB
Python
Executable File
158 lines
6.0 KiB
Python
Executable File
#!/usr/bin/env python3
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# -*- coding: utf-8 -*-
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from app import db
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from app.db.models import MISPInst
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from app.definitions import definitions as defs
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from sqlalchemy.sql import exists
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from flask import escape
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from pymisp import PyMISP
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import re
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import time
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class MISP(object):
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def __init__(self):
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return None
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def add_instance(self, instance) -> dict:
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"""
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Parse and add a MISP instance to the database.
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:return: status of the operation in JSON
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"""
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url = instance["url"]
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name = instance["name"]
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apikey = instance["key"]
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verify = instance["ssl"]
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last_sync = int(time.time()-31536000) # One year
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sameinstances = db.session.query(MISPInst).filter(
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MISPInst.url == url, MISPInst.apikey == apikey)
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if sameinstances.count():
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return {"status": False,
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"message": "This MISP instance already exists"}
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if name:
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if self.test_instance(url, apikey, verify):
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added_on = int(time.time())
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db.session.add(MISPInst(name, escape(
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url), apikey, verify, added_on, last_sync))
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db.session.commit()
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return {"status": True,
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"message": "MISP instance added"}
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else:
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return {"status": False,
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"message": "Please verify the connection to the MISP instance"}
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else:
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return {"status": False,
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"message": "Please provide a name for your instance"}
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@staticmethod
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def delete_instance(misp_id) -> dict:
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"""
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Delete a MISP instance by its id in the database.
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:return: status of the operation in JSON
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"""
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if db.session.query(exists().where(MISPInst.id == misp_id)).scalar():
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db.session.query(MISPInst).filter_by(id=misp_id).delete()
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db.session.commit()
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return {"status": True,
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"message": "MISP instance deleted"}
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else:
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return {"status": False,
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"message": "MISP instance not found"}
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def get_instances(self) -> list:
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"""
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Get MISP instances from the database
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:return: generator of the records.
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"""
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for misp in db.session.query(MISPInst).all():
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misp = misp.__dict__
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yield {"id": misp["id"],
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"name": misp["name"],
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"url": misp["url"],
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"apikey": misp["apikey"],
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"verifycert": True if misp["verifycert"] else False,
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"connected": self.test_instance(misp["url"], misp["apikey"], misp["verifycert"]),
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"lastsync": misp["last_sync"]}
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@staticmethod
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def test_instance(url, apikey, verify) -> bool:
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"""
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Test the connection of the MISP instance.
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:return: generator of the records.
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"""
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try:
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PyMISP(url, apikey, verify)
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return True
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except:
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return False
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@staticmethod
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def update_sync(misp_id) -> bool:
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"""
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Update the last synchronization date by the actual date.
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:return: bool, True if updated.
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"""
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try:
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misp = MISPInst.query.get(int(misp_id))
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misp.last_sync = int(time.time())
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db.session.commit()
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return True
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except:
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return False
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@staticmethod
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def get_iocs(misp_id) -> list:
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"""
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Get all IOCs from specific MISP instance
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:return: generator containing the IOCs.
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"""
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misp = MISPInst.query.get(int(misp_id))
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if misp is not None:
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if misp.url and misp.apikey:
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try:
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# Connect to MISP instance and get network activity attributes.
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m = PyMISP(misp.url, misp.apikey, misp.verifycert)
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r = m.search("attributes", category="Network activity", date_from=int(misp.last_sync))
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except:
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print("Unable to connect to the MISP instance ({}/{}).".format(misp.url, misp.apikey))
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return []
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for attr in r["Attribute"]:
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if attr["type"] in ["ip-dst", "domain", "snort", "x509-fingerprint-sha1"]:
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ioc = {"value": attr["value"],
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"type": None,
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"tag": "suspect",
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"tlp": "white"}
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# Deduce the IOC type.
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if re.match(defs["iocs_types"][0]["regex"], attr["value"]):
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ioc["type"] = "ip4addr"
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elif re.match(defs["iocs_types"][1]["regex"], attr["value"]):
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ioc["type"] = "ip6addr"
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elif re.match(defs["iocs_types"][2]["regex"], attr["value"]):
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ioc["type"] = "cidr"
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elif re.match(defs["iocs_types"][3]["regex"], attr["value"]):
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ioc["type"] = "domain"
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elif re.match(defs["iocs_types"][4]["regex"], attr["value"]):
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ioc["type"] = "sha1cert"
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elif "alert " in attr["value"][0:6]:
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ioc["type"] = "snort"
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else:
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continue
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if "Tag" in attr:
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for tag in attr["Tag"]:
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# Add a TLP to the IOC if defined in tags.
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tlp = re.search(r"^(?:tlp:)(red|green|amber|white)", tag['name'].lower())
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if tlp: ioc["tlp"] = tlp.group(1)
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# Add possible tag (need to match SpyGuard tags)
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if tag["name"].lower() in [t["tag"] for t in defs["iocs_tags"]]:
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ioc["tag"] = tag["name"].lower()
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yield ioc
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