PyMISP/examples/et2misp.py

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#!/usr/bin/env python
# -*- coding: utf-8 -*-
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#
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# Copy Emerging Threats Block IPs list to several MISP events
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# Because of the large size of the list the first run will take a minute
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# Running it again will update the MISP events if changes are detected
#
# This script requires PyMISP 2.4.50 or later
import sys, json, time, requests
from pymisp import PyMISP
from keys import misp_url, misp_key, misp_verifycert
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et_url = 'https://rules.emergingthreats.net/fwrules/emerging-Block-IPs.txt'
et_str = 'Emerging Threats '
def init_misp():
global mymisp
mymisp = PyMISP(misp_url, misp_key, misp_verifycert)
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def load_misp_event(eid):
global et_attr
global et_drev
global et_event
et_attr = {}
et_drev = {}
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et_event = mymisp.get(eid)
echeck(et_event)
for a in et_event['Event']['Attribute']:
if a['category'] == 'Network activity':
et_attr[a['value']] = a['id']
continue
if a['category'] == 'Internal reference':
et_drev = a;
def init_et():
global et_data
global et_rev
requests.packages.urllib3.disable_warnings()
s = requests.Session()
r = s.get(et_url)
if r.status_code != 200:
raise Exception('Error getting ET data: {}'.format(r.text))
name = ''
et_data = {}
et_rev = 0
for line in r.text.splitlines():
if line.startswith('# Rev '):
et_rev = int(line[6:])
continue
if line.startswith('#'):
name = line[1:].strip()
if et_rev and not et_data.get(name):
et_data[name] = {}
continue
l = line.rstrip()
if l:
et_data[name][l] = name
def update_et_event(name):
if et_drev and et_rev and int(et_drev['value']) < et_rev:
# Copy MISP attributes to new dict
et_ips = dict.fromkeys(et_attr.keys())
# Weed out attributes still in ET data
for k,v in et_data[name].items():
et_attr.pop(k, None)
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# Delete the leftover attributes from MISP
for k,v in et_attr.items():
r = mymisp.delete_attribute(v)
if r.get('errors'):
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print("Error deleting attribute {} ({}): {}\n".format(v,k,r['errors']))
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# Weed out ips already in the MISP event
for k,v in et_ips.items():
et_data[name].pop(k, None)
# Add new attributes to MISP event
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ipdst = []
for i,k in enumerate(et_data[name].items(), 1-len(et_data[name])):
ipdst.append(k[0])
if i % 100 == 0:
r = mymisp.add_ipdst(et_event, ipdst)
echeck(r, et_event['Event']['id'])
ipdst = []
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# Update revision number
et_drev['value'] = et_rev
et_drev.pop('timestamp', None)
attr = []
attr.append(et_drev)
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# Publish updated MISP event
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et_event['Event']['Attribute'] = attr
et_event['Event']['published'] = False
et_event['Event']['date'] = time.strftime('%Y-%m-%d')
r = mymisp.publish(et_event)
echeck(r, et_event['Event']['id'])
def echeck(r, eid=None):
if r.get('errors'):
if eid:
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print("Processing event {} failed: {}".format(eid, r['errors']))
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else:
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print(r['errors'])
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sys.exit(1)
if __name__ == '__main__':
init_misp()
init_et()
for et_type in set(et_data.keys()):
info = et_str + et_type
r = mymisp.search_index(eventinfo=info)
if r['response']:
eid=r['response'][0]['id']
else: # event not found, create it
new_event = mymisp.new_event(info=info, distribution=3, threat_level_id=4, analysis=1)
echeck(new_event)
eid=new_event['Event']['id']
r = mymisp.add_internal_text(new_event, 1, comment='Emerging Threats revision number')
echeck(r, eid)
load_misp_event(eid)
update_et_event(et_type)