threatfox.py

# -*- coding: utf-8 -*-
import requests
import json

misperrors = {'error': 'Error'}
mispattributes = {'input': ['md5', 'sha1', 'sha256', 'domain', 'url', 'email-src', 'ip-dst|port', 'ip-src|port'], 'output': ['text']}
moduleinfo = {'version': '0.1', 'author': 'Corsin Camichel', 'description': 'Module to search for an IOC on ThreatFox by abuse.ch.', 'module-type': ['hover', 'expansion']}
moduleconfig = []

API_URL = "https://threatfox-api.abuse.ch/api/v1/"


# copied from
# https://github.com/marjatech/threatfox2misp/blob/main/threatfox2misp.py
def confidence_level_to_tag(level: int) -> str:
    confidence_tagging = {
        0: 'misp:confidence-level="unconfident"',
        10: 'misp:confidence-level="rarely-confident"',
        37: 'misp:confidence-level="fairly-confident"',
        63: 'misp:confidence-level="usually-confident"',
        90: 'misp:confidence-level="completely-confident"',
    }

    confidence_tag = ""
    for tag_minvalue, tag in confidence_tagging.items():
        if level >= tag_minvalue:
            confidence_tag = tag
    return confidence_tag


def handler(q=False):
    if q is False:
        return False

    request = json.loads(q)
    ret_val = ""

    for input_type in mispattributes['input']:
        if input_type in request:
            to_query = request[input_type]
            break
    else:
        misperrors['error'] = "Unsupported attributes type:"
        return misperrors

    data = {"query": "search_ioc", "search_term": f"{to_query}"}
    response = requests.post(API_URL, data=json.dumps(data))
    if response.status_code == 200:
        result = json.loads(response.text)
        if(result["query_status"] == "ok"):
            confidence_tag = confidence_level_to_tag(result["data"][0]["confidence_level"])
            ret_val = {'results': [{'types': mispattributes['output'], 'values': [result["data"][0]["threat_type_desc"]], 'tags': [result["data"][0]["malware"], result["data"][0]["malware_printable"], confidence_tag]}]}

    return ret_val


def introspection():
    return mispattributes


def version():
    moduleinfo['config'] = moduleconfig
    return moduleinfo