f3nris
f34c87f0c8
search_detections and search_ngsiem_detections now return a query block (FQL sent, Falcon's total, errors) next to resources, so an empty run can be told apart from a wrong region or an API client that sees no alerts. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
75 lines
3.2 KiB
Python
75 lines
3.2 KiB
Python
import json, os, sys, urllib.request, urllib.parse, urllib.error
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SECRETS = json.loads(os.environ.get("INTEGRATION_SECRETS", "{}"))
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INPUTS = json.loads(os.environ.get("INTEGRATION_INPUTS", "{}"))
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BASE = SECRETS.get("base_url", "https://api.crowdstrike.com").rstrip("/")
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def token():
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data = urllib.parse.urlencode({"client_id": SECRETS.get("client_id", ""), "client_secret": SECRETS.get("client_secret", "")}).encode()
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req = urllib.request.Request(BASE + "/oauth2/token", data=data, headers={"Content-Type": "application/x-www-form-urlencoded", "Accept": "application/json"}, method="POST")
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with urllib.request.urlopen(req, timeout=30) as r:
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return json.loads(r.read()).get("access_token", "")
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def call(method, path, tok, params=None, body=None):
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url = BASE + path
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if params:
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# params is a list of (key, value) tuples to allow repeated keys (e.g. ids)
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url += "?" + urllib.parse.urlencode(params)
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data = json.dumps(body).encode() if body is not None else None
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headers = {"Authorization": "Bearer " + tok, "Accept": "application/json"}
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if data is not None:
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headers["Content-Type"] = "application/json"
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req = urllib.request.Request(url, data=data, headers=headers, method=method)
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with urllib.request.urlopen(req, timeout=90) as r:
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raw = r.read()
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return json.loads(raw) if raw else {}
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def csv(v):
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return [x.strip() for x in str(v or "").split(",") if x.strip()]
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def main():
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tok = token()
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# Next-Gen SIEM correlation rules raise their detections in the same unified
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# Alerts API as the EDR, under product 'ngsiem'. The product clause is always
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# kept, so a filter narrows the NG-SIEM detections and never widens past them.
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fql = "product:'ngsiem'"
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extra = str(INPUTS.get("filter") or "").strip()
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if extra:
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fql += "+(" + extra + ")"
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# The alert rule's watermark lands in created_from, folded into the FQL as
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# created_timestamp (see search_detections for why it is not the filter input).
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since = str(INPUTS.get("created_from") or "").strip().strip("'\"")
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if since:
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fql += "+created_timestamp:>'" + since + "'"
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limit = INPUTS.get("limit", 50)
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params = [("filter", fql), ("limit", limit), ("sort", "created_timestamp.desc")]
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found = call("GET", "/alerts/queries/alerts/v2", tok, params=params)
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ids = found.get("resources", []) or []
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if ids:
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result = call("POST", "/alerts/entities/alerts/v2", tok, body={"composite_ids": ids})
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else:
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result = {"resources": []}
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# An empty page says nothing on its own: keep what the query answered — the
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# FQL actually sent, Falcon's total for it and any errors — so a run with no
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# alerts reads as "matched nothing" rather than as a silent failure.
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result["query"] = {
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"filter": fql,
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"total": ((found.get("meta") or {}).get("pagination") or {}).get("total"),
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"errors": found.get("errors") or [],
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}
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print(json.dumps(result))
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try:
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main()
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except urllib.error.HTTPError as e:
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print(json.dumps({"error": "HTTP " + str(e.code), "detail": e.read().decode("utf-8", "replace")}))
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sys.exit(1)
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except Exception as e:
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print(json.dumps({"error": str(e)}))
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sys.exit(1)
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