first version of ThreatFox enrichment module

misp_modules/modules/expansion/threatfox.py

@@ -0,0 +1,59 @@
+# -*- 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"], confidence_tag ] }]}
+
+    return ret_val
+
+def introspection():
+    return mispattributes
+
+def version():
+    moduleinfo['config'] = moduleconfig
+    return moduleinfo