feat(chronicle): new Google Chronicle SIEM integration
Chronicle Backstory API, 5 commands: list IOCs, list alerts, list assets, get IOC details. Service-account RS256 JWT auth (remote engine, PyJWT + cryptography). Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
This commit is contained in:
Guillaume BOURGEOIS
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id: chronicle
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name: Google Chronicle
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version: 1.0.0
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description: "Google Chronicle (Backstory API) — SIEM threat context: list IOCs seen in the enterprise, list alerts, list assets, and get IOC details for an artifact. Authenticates with a Google service account (RS256 JWT bearer flow). Runs on a remote engine. Requires the Python 'PyJWT' and 'cryptography' libraries on the engine host (pip install pyjwt cryptography)."
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changelog: "1.0.0 — Initial release: list IOCs, list alerts, list assets, get IOC details."
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category: siem
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# Per-instance configuration. The scripts build a signed RS256 assertion from the
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# service account's private_key/client_email and exchange it for an access token
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# (scope chronicle-backstory). base_url is the regional Chronicle API host.
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config_schema:
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properties:
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service_account_json:
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type: string
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description: "Full Chronicle service account key JSON (must contain client_email and private_key)"
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x-soar-sensitive: true
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base_url:
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type: string
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description: "Chronicle API base URL (region-specific)"
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default: "https://backstory.googleapis.com"
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required:
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- service_account_json
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commands:
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- id: list_iocs
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name: chronicle-list-iocs
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description: "List IOCs (indicators of compromise) observed in the enterprise since a start time."
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risk: read
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inputs_schema:
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properties:
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start_time: { type: string, description: "RFC3339 start time (e.g. 2024-01-01T00:00:00Z)" }
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page_size: { type: number, description: "Max IOCs (default 100)" }
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required: [start_time]
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outputs_schema: { properties: {} }
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- id: list_alerts
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name: chronicle-list-alerts
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description: "List alerts in a time window."
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risk: read
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inputs_schema:
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properties:
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start_time: { type: string, description: "RFC3339 start time" }
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end_time: { type: string, description: "RFC3339 end time" }
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page_size: { type: number, description: "Max alerts (default 100)" }
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required: [start_time, end_time]
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outputs_schema: { properties: {} }
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- id: list_assets
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name: chronicle-list-assets
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description: "List assets that accessed an artifact (domain, IP, or hash) in a time window."
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risk: read
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inputs_schema:
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properties:
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artifact_type: { type: string, description: "domain_name, destination_ip_address, or hash_sha256" }
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artifact_value: { type: string, description: "The artifact value" }
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start_time: { type: string, description: "RFC3339 start time" }
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end_time: { type: string, description: "RFC3339 end time" }
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required: [artifact_type, artifact_value, start_time, end_time]
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outputs_schema: { properties: {} }
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- id: ioc_details
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name: chronicle-ioc-details
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description: "Get IOC details for an artifact (domain, IP, or hash)."
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risk: read
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inputs_schema:
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properties:
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artifact_type: { type: string, description: "domain_name, destination_ip_address, or hash_sha256" }
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artifact_value: { type: string, description: "The artifact value" }
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required: [artifact_type, artifact_value]
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outputs_schema: { properties: {} }
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- id: test_connection
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name: chronicle-test-connection
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description: "Verify the service-account token exchange (used by the Test button)."
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risk: read
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inputs_schema:
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properties: {}
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required: []
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outputs_schema: { properties: {} }
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@@ -0,0 +1,82 @@
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import json, os, sys, time, urllib.parse, urllib.request, urllib.error
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import jwt
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TOKEN_URL = "https://oauth2.googleapis.com/token"
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SCOPE = "https://www.googleapis.com/auth/chronicle-backstory"
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def _cfg():
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return json.loads(os.environ.get("INTEGRATION_SECRETS", "{}"))
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def _inputs():
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return json.loads(os.environ.get("INTEGRATION_INPUTS", "{}"))
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def _base(cfg):
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return (str(cfg.get("base_url") or "https://backstory.googleapis.com")).rstrip("/")
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def _token(cfg):
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raw = cfg.get("service_account_json", "")
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sa = json.loads(raw) if isinstance(raw, str) else raw
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if not sa.get("client_email") or not sa.get("private_key"):
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raise Exception("service_account_json must contain client_email and private_key")
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now = int(time.time())
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aud = sa.get("token_uri") or TOKEN_URL
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payload = {"iss": sa["client_email"], "scope": SCOPE, "aud": aud, "iat": now, "exp": now + 3600}
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assertion = jwt.encode(payload, sa["private_key"], algorithm="RS256")
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data = urllib.parse.urlencode({
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"grant_type": "urn:ietf:params:oauth:grant-type:jwt-bearer",
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"assertion": assertion,
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}).encode("utf-8")
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req = urllib.request.Request(aud, data=data,
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headers={"Content-Type": "application/x-www-form-urlencoded"}, method="POST")
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with urllib.request.urlopen(req, timeout=60) as r:
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tok = json.loads(r.read())
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if not tok.get("access_token"):
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raise Exception("Token request failed: " + json.dumps(tok))
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return tok["access_token"]
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def api(method, path, cfg, params=None):
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url = _base(cfg) + path
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if params:
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clean = {k: v for k, v in params.items() if v not in (None, "")}
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if clean:
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url += "?" + urllib.parse.urlencode(clean)
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headers = {"Accept": "application/json", "Authorization": "Bearer " + _token(cfg)}
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req = urllib.request.Request(url, 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 _run(fn):
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try:
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print(json.dumps(fn(_cfg(), _inputs())))
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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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def _artifact_params(inputs):
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at = inputs.get("artifact_type")
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av = inputs.get("artifact_value")
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if not at:
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raise Exception("artifact_type is required")
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if not av:
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raise Exception("artifact_value is required")
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return {"artifact." + at: av}
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def main(cfg, inputs):
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params = _artifact_params(inputs)
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return api("GET", "/v1/artifact/listiocdetails", cfg, params)
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_run(main)
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@@ -0,0 +1,83 @@
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import json, os, sys, time, urllib.parse, urllib.request, urllib.error
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import jwt
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TOKEN_URL = "https://oauth2.googleapis.com/token"
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SCOPE = "https://www.googleapis.com/auth/chronicle-backstory"
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def _cfg():
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return json.loads(os.environ.get("INTEGRATION_SECRETS", "{}"))
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def _inputs():
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return json.loads(os.environ.get("INTEGRATION_INPUTS", "{}"))
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def _base(cfg):
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return (str(cfg.get("base_url") or "https://backstory.googleapis.com")).rstrip("/")
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def _token(cfg):
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raw = cfg.get("service_account_json", "")
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sa = json.loads(raw) if isinstance(raw, str) else raw
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if not sa.get("client_email") or not sa.get("private_key"):
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raise Exception("service_account_json must contain client_email and private_key")
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now = int(time.time())
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aud = sa.get("token_uri") or TOKEN_URL
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payload = {"iss": sa["client_email"], "scope": SCOPE, "aud": aud, "iat": now, "exp": now + 3600}
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assertion = jwt.encode(payload, sa["private_key"], algorithm="RS256")
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data = urllib.parse.urlencode({
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"grant_type": "urn:ietf:params:oauth:grant-type:jwt-bearer",
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"assertion": assertion,
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}).encode("utf-8")
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req = urllib.request.Request(aud, data=data,
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headers={"Content-Type": "application/x-www-form-urlencoded"}, method="POST")
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with urllib.request.urlopen(req, timeout=60) as r:
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tok = json.loads(r.read())
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if not tok.get("access_token"):
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raise Exception("Token request failed: " + json.dumps(tok))
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return tok["access_token"]
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def api(method, path, cfg, params=None):
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url = _base(cfg) + path
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if params:
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clean = {k: v for k, v in params.items() if v not in (None, "")}
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if clean:
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url += "?" + urllib.parse.urlencode(clean)
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headers = {"Accept": "application/json", "Authorization": "Bearer " + _token(cfg)}
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req = urllib.request.Request(url, 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 _run(fn):
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try:
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print(json.dumps(fn(_cfg(), _inputs())))
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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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def main(cfg, inputs):
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start_time = inputs.get("start_time")
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if not start_time:
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raise Exception("start_time is required")
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end_time = inputs.get("end_time")
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if not end_time:
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raise Exception("end_time is required")
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page_size = inputs.get("page_size")
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params = {
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"start_time": start_time,
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"end_time": end_time,
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"page_size": int(page_size or 100),
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}
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return api("GET", "/v1/alert/listalerts", cfg, params)
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_run(main)
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@@ -0,0 +1,90 @@
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import json, os, sys, time, urllib.parse, urllib.request, urllib.error
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import jwt
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TOKEN_URL = "https://oauth2.googleapis.com/token"
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SCOPE = "https://www.googleapis.com/auth/chronicle-backstory"
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def _cfg():
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return json.loads(os.environ.get("INTEGRATION_SECRETS", "{}"))
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def _inputs():
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return json.loads(os.environ.get("INTEGRATION_INPUTS", "{}"))
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def _base(cfg):
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return (str(cfg.get("base_url") or "https://backstory.googleapis.com")).rstrip("/")
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def _token(cfg):
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raw = cfg.get("service_account_json", "")
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sa = json.loads(raw) if isinstance(raw, str) else raw
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if not sa.get("client_email") or not sa.get("private_key"):
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raise Exception("service_account_json must contain client_email and private_key")
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now = int(time.time())
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aud = sa.get("token_uri") or TOKEN_URL
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payload = {"iss": sa["client_email"], "scope": SCOPE, "aud": aud, "iat": now, "exp": now + 3600}
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assertion = jwt.encode(payload, sa["private_key"], algorithm="RS256")
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data = urllib.parse.urlencode({
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"grant_type": "urn:ietf:params:oauth:grant-type:jwt-bearer",
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"assertion": assertion,
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}).encode("utf-8")
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req = urllib.request.Request(aud, data=data,
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headers={"Content-Type": "application/x-www-form-urlencoded"}, method="POST")
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with urllib.request.urlopen(req, timeout=60) as r:
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tok = json.loads(r.read())
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if not tok.get("access_token"):
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raise Exception("Token request failed: " + json.dumps(tok))
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return tok["access_token"]
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def api(method, path, cfg, params=None):
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url = _base(cfg) + path
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if params:
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clean = {k: v for k, v in params.items() if v not in (None, "")}
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if clean:
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url += "?" + urllib.parse.urlencode(clean)
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headers = {"Accept": "application/json", "Authorization": "Bearer " + _token(cfg)}
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req = urllib.request.Request(url, 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 _run(fn):
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try:
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print(json.dumps(fn(_cfg(), _inputs())))
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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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def _artifact_params(inputs):
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at = inputs.get("artifact_type")
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av = inputs.get("artifact_value")
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if not at:
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raise Exception("artifact_type is required")
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if not av:
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raise Exception("artifact_value is required")
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return {"artifact." + at: av}
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def main(cfg, inputs):
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params = _artifact_params(inputs)
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start_time = inputs.get("start_time")
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if not start_time:
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raise Exception("start_time is required")
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end_time = inputs.get("end_time")
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if not end_time:
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raise Exception("end_time is required")
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params["start_time"] = start_time
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params["end_time"] = end_time
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return api("GET", "/v1/artifact/listassets", cfg, params)
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_run(main)
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@@ -0,0 +1,79 @@
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import json, os, sys, time, urllib.parse, urllib.request, urllib.error
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import jwt
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TOKEN_URL = "https://oauth2.googleapis.com/token"
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SCOPE = "https://www.googleapis.com/auth/chronicle-backstory"
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def _cfg():
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return json.loads(os.environ.get("INTEGRATION_SECRETS", "{}"))
|
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|
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|
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def _inputs():
|
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return json.loads(os.environ.get("INTEGRATION_INPUTS", "{}"))
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|
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def _base(cfg):
|
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return (str(cfg.get("base_url") or "https://backstory.googleapis.com")).rstrip("/")
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|
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|
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def _token(cfg):
|
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raw = cfg.get("service_account_json", "")
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sa = json.loads(raw) if isinstance(raw, str) else raw
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if not sa.get("client_email") or not sa.get("private_key"):
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raise Exception("service_account_json must contain client_email and private_key")
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now = int(time.time())
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aud = sa.get("token_uri") or TOKEN_URL
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payload = {"iss": sa["client_email"], "scope": SCOPE, "aud": aud, "iat": now, "exp": now + 3600}
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assertion = jwt.encode(payload, sa["private_key"], algorithm="RS256")
|
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data = urllib.parse.urlencode({
|
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"grant_type": "urn:ietf:params:oauth:grant-type:jwt-bearer",
|
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"assertion": assertion,
|
||||
}).encode("utf-8")
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req = urllib.request.Request(aud, data=data,
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headers={"Content-Type": "application/x-www-form-urlencoded"}, method="POST")
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with urllib.request.urlopen(req, timeout=60) as r:
|
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tok = json.loads(r.read())
|
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if not tok.get("access_token"):
|
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raise Exception("Token request failed: " + json.dumps(tok))
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return tok["access_token"]
|
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|
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|
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def api(method, path, cfg, params=None):
|
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url = _base(cfg) + path
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if params:
|
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clean = {k: v for k, v in params.items() if v not in (None, "")}
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if clean:
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url += "?" + urllib.parse.urlencode(clean)
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headers = {"Accept": "application/json", "Authorization": "Bearer " + _token(cfg)}
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req = urllib.request.Request(url, 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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|
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|
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def _run(fn):
|
||||
try:
|
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print(json.dumps(fn(_cfg(), _inputs())))
|
||||
except urllib.error.HTTPError as e:
|
||||
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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|
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def main(cfg, inputs):
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start_time = inputs.get("start_time")
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if not start_time:
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raise Exception("start_time is required")
|
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page_size = inputs.get("page_size")
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params = {
|
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"start_time": start_time,
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"page_size": int(page_size or 100),
|
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}
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return api("GET", "/v1/ioc/listiocs", cfg, params)
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|
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_run(main)
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@@ -0,0 +1,72 @@
|
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import json, os, sys, time, urllib.parse, urllib.request, urllib.error
|
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|
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import jwt
|
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|
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TOKEN_URL = "https://oauth2.googleapis.com/token"
|
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SCOPE = "https://www.googleapis.com/auth/chronicle-backstory"
|
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|
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|
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def _cfg():
|
||||
return json.loads(os.environ.get("INTEGRATION_SECRETS", "{}"))
|
||||
|
||||
|
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def _inputs():
|
||||
return json.loads(os.environ.get("INTEGRATION_INPUTS", "{}"))
|
||||
|
||||
|
||||
def _base(cfg):
|
||||
return (str(cfg.get("base_url") or "https://backstory.googleapis.com")).rstrip("/")
|
||||
|
||||
|
||||
def _token(cfg):
|
||||
raw = cfg.get("service_account_json", "")
|
||||
sa = json.loads(raw) if isinstance(raw, str) else raw
|
||||
if not sa.get("client_email") or not sa.get("private_key"):
|
||||
raise Exception("service_account_json must contain client_email and private_key")
|
||||
now = int(time.time())
|
||||
aud = sa.get("token_uri") or TOKEN_URL
|
||||
payload = {"iss": sa["client_email"], "scope": SCOPE, "aud": aud, "iat": now, "exp": now + 3600}
|
||||
assertion = jwt.encode(payload, sa["private_key"], algorithm="RS256")
|
||||
data = urllib.parse.urlencode({
|
||||
"grant_type": "urn:ietf:params:oauth:grant-type:jwt-bearer",
|
||||
"assertion": assertion,
|
||||
}).encode("utf-8")
|
||||
req = urllib.request.Request(aud, data=data,
|
||||
headers={"Content-Type": "application/x-www-form-urlencoded"}, method="POST")
|
||||
with urllib.request.urlopen(req, timeout=60) as r:
|
||||
tok = json.loads(r.read())
|
||||
if not tok.get("access_token"):
|
||||
raise Exception("Token request failed: " + json.dumps(tok))
|
||||
return tok["access_token"]
|
||||
|
||||
|
||||
def api(method, path, cfg, params=None):
|
||||
url = _base(cfg) + path
|
||||
if params:
|
||||
clean = {k: v for k, v in params.items() if v not in (None, "")}
|
||||
if clean:
|
||||
url += "?" + urllib.parse.urlencode(clean)
|
||||
headers = {"Accept": "application/json", "Authorization": "Bearer " + _token(cfg)}
|
||||
req = urllib.request.Request(url, headers=headers, method=method)
|
||||
with urllib.request.urlopen(req, timeout=90) as r:
|
||||
raw = r.read()
|
||||
return json.loads(raw) if raw else {}
|
||||
|
||||
|
||||
def _run(fn):
|
||||
try:
|
||||
print(json.dumps(fn(_cfg(), _inputs())))
|
||||
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)
|
||||
|
||||
|
||||
def main(cfg, inputs):
|
||||
api("GET", "/v1/ioc/listiocs", cfg, {"page_size": 1})
|
||||
return {"ok": True}
|
||||
|
||||
|
||||
_run(main)
|
||||
Reference in New Issue
Block a user