From aca1db5cad411cff17e7100040630cfa1a5a1efa Mon Sep 17 00:00:00 2001 From: Guillaume BOURGEOIS Date: Sun, 12 Jul 2026 00:25:51 +0200 Subject: [PATCH] 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) --- integrations/chronicle/manifest.yaml | 76 ++++++++++++++++ integrations/chronicle/scripts/ioc_details.py | 82 +++++++++++++++++ integrations/chronicle/scripts/list_alerts.py | 83 +++++++++++++++++ integrations/chronicle/scripts/list_assets.py | 90 +++++++++++++++++++ integrations/chronicle/scripts/list_iocs.py | 79 ++++++++++++++++ .../chronicle/scripts/test_connection.py | 72 +++++++++++++++ 6 files changed, 482 insertions(+) create mode 100644 integrations/chronicle/manifest.yaml create mode 100644 integrations/chronicle/scripts/ioc_details.py create mode 100644 integrations/chronicle/scripts/list_alerts.py create mode 100644 integrations/chronicle/scripts/list_assets.py create mode 100644 integrations/chronicle/scripts/list_iocs.py create mode 100644 integrations/chronicle/scripts/test_connection.py diff --git a/integrations/chronicle/manifest.yaml b/integrations/chronicle/manifest.yaml new file mode 100644 index 0000000..033441a --- /dev/null +++ b/integrations/chronicle/manifest.yaml @@ -0,0 +1,76 @@ +id: chronicle +name: Google Chronicle +version: 1.0.0 +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)." +changelog: "1.0.0 — Initial release: list IOCs, list alerts, list assets, get IOC details." +category: siem + +# Per-instance configuration. The scripts build a signed RS256 assertion from the +# service account's private_key/client_email and exchange it for an access token +# (scope chronicle-backstory). base_url is the regional Chronicle API host. +config_schema: + properties: + service_account_json: + type: string + description: "Full Chronicle service account key JSON (must contain client_email and private_key)" + x-soar-sensitive: true + base_url: + type: string + description: "Chronicle API base URL (region-specific)" + default: "https://backstory.googleapis.com" + required: + - service_account_json + +commands: + - id: list_iocs + name: chronicle-list-iocs + description: "List IOCs (indicators of compromise) observed in the enterprise since a start time." + risk: read + inputs_schema: + properties: + start_time: { type: string, description: "RFC3339 start time (e.g. 2024-01-01T00:00:00Z)" } + page_size: { type: number, description: "Max IOCs (default 100)" } + required: [start_time] + outputs_schema: { properties: {} } + - id: list_alerts + name: chronicle-list-alerts + description: "List alerts in a time window." + risk: read + inputs_schema: + properties: + start_time: { type: string, description: "RFC3339 start time" } + end_time: { type: string, description: "RFC3339 end time" } + page_size: { type: number, description: "Max alerts (default 100)" } + required: [start_time, end_time] + outputs_schema: { properties: {} } + - id: list_assets + name: chronicle-list-assets + description: "List assets that accessed an artifact (domain, IP, or hash) in a time window." + risk: read + inputs_schema: + properties: + artifact_type: { type: string, description: "domain_name, destination_ip_address, or hash_sha256" } + artifact_value: { type: string, description: "The artifact value" } + start_time: { type: string, description: "RFC3339 start time" } + end_time: { type: string, description: "RFC3339 end time" } + required: [artifact_type, artifact_value, start_time, end_time] + outputs_schema: { properties: {} } + - id: ioc_details + name: chronicle-ioc-details + description: "Get IOC details for an artifact (domain, IP, or hash)." + risk: read + inputs_schema: + properties: + artifact_type: { type: string, description: "domain_name, destination_ip_address, or hash_sha256" } + artifact_value: { type: string, description: "The artifact value" } + required: [artifact_type, artifact_value] + outputs_schema: { properties: {} } + + - id: test_connection + name: chronicle-test-connection + description: "Verify the service-account token exchange (used by the Test button)." + risk: read + inputs_schema: + properties: {} + required: [] + outputs_schema: { properties: {} } diff --git a/integrations/chronicle/scripts/ioc_details.py b/integrations/chronicle/scripts/ioc_details.py new file mode 100644 index 0000000..cf9d06f --- /dev/null +++ b/integrations/chronicle/scripts/ioc_details.py @@ -0,0 +1,82 @@ +import json, os, sys, time, urllib.parse, urllib.request, urllib.error + +import jwt + +TOKEN_URL = "https://oauth2.googleapis.com/token" +SCOPE = "https://www.googleapis.com/auth/chronicle-backstory" + + +def _cfg(): + return json.loads(os.environ.get("INTEGRATION_SECRETS", "{}")) + + +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 _artifact_params(inputs): + at = inputs.get("artifact_type") + av = inputs.get("artifact_value") + if not at: + raise Exception("artifact_type is required") + if not av: + raise Exception("artifact_value is required") + return {"artifact." + at: av} + + +def main(cfg, inputs): + params = _artifact_params(inputs) + return api("GET", "/v1/artifact/listiocdetails", cfg, params) + + +_run(main) diff --git a/integrations/chronicle/scripts/list_alerts.py b/integrations/chronicle/scripts/list_alerts.py new file mode 100644 index 0000000..6e63cc5 --- /dev/null +++ b/integrations/chronicle/scripts/list_alerts.py @@ -0,0 +1,83 @@ +import json, os, sys, time, urllib.parse, urllib.request, urllib.error + +import jwt + +TOKEN_URL = "https://oauth2.googleapis.com/token" +SCOPE = "https://www.googleapis.com/auth/chronicle-backstory" + + +def _cfg(): + return json.loads(os.environ.get("INTEGRATION_SECRETS", "{}")) + + +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): + start_time = inputs.get("start_time") + if not start_time: + raise Exception("start_time is required") + end_time = inputs.get("end_time") + if not end_time: + raise Exception("end_time is required") + page_size = inputs.get("page_size") + params = { + "start_time": start_time, + "end_time": end_time, + "page_size": int(page_size or 100), + } + return api("GET", "/v1/alert/listalerts", cfg, params) + + +_run(main) diff --git a/integrations/chronicle/scripts/list_assets.py b/integrations/chronicle/scripts/list_assets.py new file mode 100644 index 0000000..e30125a --- /dev/null +++ b/integrations/chronicle/scripts/list_assets.py @@ -0,0 +1,90 @@ +import json, os, sys, time, urllib.parse, urllib.request, urllib.error + +import jwt + +TOKEN_URL = "https://oauth2.googleapis.com/token" +SCOPE = "https://www.googleapis.com/auth/chronicle-backstory" + + +def _cfg(): + return json.loads(os.environ.get("INTEGRATION_SECRETS", "{}")) + + +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 _artifact_params(inputs): + at = inputs.get("artifact_type") + av = inputs.get("artifact_value") + if not at: + raise Exception("artifact_type is required") + if not av: + raise Exception("artifact_value is required") + return {"artifact." + at: av} + + +def main(cfg, inputs): + params = _artifact_params(inputs) + start_time = inputs.get("start_time") + if not start_time: + raise Exception("start_time is required") + end_time = inputs.get("end_time") + if not end_time: + raise Exception("end_time is required") + params["start_time"] = start_time + params["end_time"] = end_time + return api("GET", "/v1/artifact/listassets", cfg, params) + + +_run(main) diff --git a/integrations/chronicle/scripts/list_iocs.py b/integrations/chronicle/scripts/list_iocs.py new file mode 100644 index 0000000..20c794d --- /dev/null +++ b/integrations/chronicle/scripts/list_iocs.py @@ -0,0 +1,79 @@ +import json, os, sys, time, urllib.parse, urllib.request, urllib.error + +import jwt + +TOKEN_URL = "https://oauth2.googleapis.com/token" +SCOPE = "https://www.googleapis.com/auth/chronicle-backstory" + + +def _cfg(): + return json.loads(os.environ.get("INTEGRATION_SECRETS", "{}")) + + +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): + start_time = inputs.get("start_time") + if not start_time: + raise Exception("start_time is required") + page_size = inputs.get("page_size") + params = { + "start_time": start_time, + "page_size": int(page_size or 100), + } + return api("GET", "/v1/ioc/listiocs", cfg, params) + + +_run(main) diff --git a/integrations/chronicle/scripts/test_connection.py b/integrations/chronicle/scripts/test_connection.py new file mode 100644 index 0000000..864bd46 --- /dev/null +++ b/integrations/chronicle/scripts/test_connection.py @@ -0,0 +1,72 @@ +import json, os, sys, time, urllib.parse, urllib.request, urllib.error + +import jwt + +TOKEN_URL = "https://oauth2.googleapis.com/token" +SCOPE = "https://www.googleapis.com/auth/chronicle-backstory" + + +def _cfg(): + return json.loads(os.environ.get("INTEGRATION_SECRETS", "{}")) + + +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)