| 1 | from __future__ import annotations |
| 2 | |
| 3 | from cti import mitre |
| 4 | from cti.feeds.base import Feed, load_json |
| 5 | from cti.models import Indicator |
| 6 | |
| 7 | TYPE_MAP = { |
| 8 | "ip:port": "ip", |
| 9 | "domain": "domain", |
| 10 | "url": "url", |
| 11 | "md5_hash": "md5", |
| 12 | "sha256_hash": "sha256", |
| 13 | "sha1_hash": "sha1", |
| 14 | } |
| 15 | |
| 16 | |
| 17 | class ThreatFox(Feed): |
| 18 | name = "threatfox" |
| 19 | url = "https://threatfox-api.abuse.ch/api/v1/" |
| 20 | method = "POST" |
| 21 | |
| 22 | def headers(self) -> dict: |
| 23 | key = self.settings.get("auth_key") |
| 24 | return {"Auth-Key": key} if key else {} |
| 25 | |
| 26 | def request_body(self) -> dict: |
| 27 | return {"query": "get_iocs", "days": int(self.settings.get("days", 1))} |
| 28 | |
| 29 | def parse(self, raw: str) -> list[Indicator]: |
| 30 | payload = load_json(raw) |
| 31 | if payload.get("query_status") != "ok": |
| 32 | return [] |
| 33 | indicators: list[Indicator] = [] |
| 34 | for entry in payload.get("data", []): |
| 35 | ioc_type = TYPE_MAP.get(entry.get("ioc_type")) |
| 36 | if ioc_type is None: |
| 37 | continue |
| 38 | value = entry.get("ioc", "") |
| 39 | if ioc_type == "ip" and ":" in value: |
| 40 | value = value.split(":", 1)[0] |
| 41 | malware = entry.get("malware_printable") or entry.get("malware") |
| 42 | threat_type = entry.get("threat_type", "unknown") |
| 43 | techniques = mitre.techniques_for_malware(malware) |
| 44 | techniques += mitre.techniques_for_threat_type(threat_type) |
| 45 | indicators.append( |
| 46 | Indicator( |
| 47 | type=ioc_type, |
| 48 | value=value, |
| 49 | source=self.name, |
| 50 | threat_type=threat_type, |
| 51 | confidence=int(entry.get("confidence_level", 50)), |
| 52 | malware=malware, |
| 53 | techniques=sorted(set(techniques)), |
| 54 | tags=entry.get("tags") or [], |
| 55 | reference=entry.get("reference"), |
| 56 | first_seen=entry.get("first_seen"), |
| 57 | ) |
| 58 | ) |
| 59 | return indicators |