feat(crowdstrike): search Next-Gen SIEM detections (1.6.0)

NG-SIEM correlation rules file their detections in the unified Alerts API under product 'ngsiem'. search_detections defaults to epp/ldt and maps device/process/file blocks those detections do not carry. New search_ngsiem_detections command (product clause always kept, filter ANDed, created_from watermark), its own first-cut mapper on the fields every unified alert carries, and a CrowdStrike NG-SIEM Detection type. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
2026-10-15 07:53:05 +00:00
parent 585c06385c
commit 0444e120fa
4 changed files with 114 additions and 2 deletions
@@ -0,0 +1,66 @@
+import json, os, sys, urllib.request, urllib.parse, urllib.error
+
+SECRETS = json.loads(os.environ.get("INTEGRATION_SECRETS", "{}"))
+INPUTS = json.loads(os.environ.get("INTEGRATION_INPUTS", "{}"))
+BASE = SECRETS.get("base_url", "https://api.crowdstrike.com").rstrip("/")
+
+
+def token():
+    data = urllib.parse.urlencode({"client_id": SECRETS.get("client_id", ""), "client_secret": SECRETS.get("client_secret", "")}).encode()
+    req = urllib.request.Request(BASE + "/oauth2/token", data=data, headers={"Content-Type": "application/x-www-form-urlencoded", "Accept": "application/json"}, method="POST")
+    with urllib.request.urlopen(req, timeout=30) as r:
+        return json.loads(r.read()).get("access_token", "")
+
+
+def call(method, path, tok, params=None, body=None):
+    url = BASE + path
+    if params:
+        # params is a list of (key, value) tuples to allow repeated keys (e.g. ids)
+        url += "?" + urllib.parse.urlencode(params)
+    data = json.dumps(body).encode() if body is not None else None
+    headers = {"Authorization": "Bearer " + tok, "Accept": "application/json"}
+    if data is not None:
+        headers["Content-Type"] = "application/json"
+    req = urllib.request.Request(url, data=data, headers=headers, method=method)
+    with urllib.request.urlopen(req, timeout=90) as r:
+        raw = r.read()
+        return json.loads(raw) if raw else {}
+
+
+def csv(v):
+    return [x.strip() for x in str(v or "").split(",") if x.strip()]
+
+
+def main():
+    tok = token()
+    # Next-Gen SIEM correlation rules raise their detections in the same unified
+    # Alerts API as the EDR, under product 'ngsiem'. The product clause is always
+    # kept, so a filter narrows the NG-SIEM detections and never widens past them.
+    fql = "product:'ngsiem'"
+    extra = str(INPUTS.get("filter") or "").strip()
+    if extra:
+        fql += "+(" + extra + ")"
+    # The alert rule's watermark lands in created_from, folded into the FQL as
+    # created_timestamp (see search_detections for why it is not the filter input).
+    since = str(INPUTS.get("created_from") or "").strip().strip("'\"")
+    if since:
+        fql += "+created_timestamp:>'" + since + "'"
+    limit = INPUTS.get("limit", 50)
+    params = [("filter", fql), ("limit", limit), ("sort", "created_timestamp.desc")]
+    found = call("GET", "/alerts/queries/alerts/v2", tok, params=params)
+    ids = found.get("resources", []) or []
+    if ids:
+        result = call("POST", "/alerts/entities/alerts/v2", tok, body={"composite_ids": ids})
+    else:
+        result = {"resources": []}
+    print(json.dumps(result))
+
+
+try:
+    main()
+except urllib.error.HTTPError as e:
+    print(json.dumps({"error": "HTTP " + str(e.code), "detail": e.read().decode("utf-8", "replace")}))
+    sys.exit(1)
+except Exception as e:
+    print(json.dumps({"error": str(e)}))
+    sys.exit(1)