feat(dlp): implement SIEM/SOAR integrations (CEF, webhook, syslog, systemd timers)

2026-05-13 02:30:52 +03:00
parent 067457198d
commit fd2e9ac59d
15 changed files with 563 additions and 33 deletions
@@ -2,28 +2,153 @@
 from __future__ import annotations

 import json
-import os
+import logging
 import time
-from urllib import request
+from datetime import datetime, timezone
+from pathlib import Path
+from typing import Any
+from urllib import error, request
+
+import yaml
+
+LOG = logging.getLogger("aw.dlp.webhook_sender")


-def post(url: str, payload: dict, retries: int = 3) -> bool:
-    body = json.dumps(payload).encode("utf-8")
-    for i in range(retries):
+def setup_logging() -> None:
+    logging.basicConfig(level=logging.INFO, format="%(asctime)s %(levelname)s %(message)s")
+
+
+def load_yaml(path: Path) -> dict[str, Any]:
+    if not path.exists():
+        return {}
+    data = yaml.safe_load(path.read_text(encoding="utf-8")) or {}
+    if not isinstance(data, dict):
+        return {}
+    return data
+
+
+def load_json(path: Path) -> dict[str, Any]:
+    if not path.exists():
+        return {}
+    try:
+        data = json.loads(path.read_text(encoding="utf-8"))
+        if isinstance(data, dict):
+            return data
+    except Exception:
+        return {}
+    return {}
+
+
+def save_json(path: Path, payload: dict[str, Any]) -> None:
+    path.parent.mkdir(parents=True, exist_ok=True)
+    path.write_text(json.dumps(payload, ensure_ascii=False, indent=2), encoding="utf-8")
+
+
+def http_json(url: str, timeout: int = 15) -> Any:
+    req = request.Request(url, method="GET")
+    with request.urlopen(req, timeout=timeout) as resp:
+        return json.loads(resp.read().decode("utf-8", errors="ignore"))
+
+
+def post_with_retry(url: str, payload: dict[str, Any], retries: int, timeout: int, backoff_base: float) -> bool:
+    body = json.dumps(payload, ensure_ascii=False).encode("utf-8")
+    headers = {"Content-Type": "application/json; charset=utf-8"}
+    for attempt in range(1, retries + 1):
        try:
-            req = request.Request(url, data=body, headers={"Content-Type": "application/json"}, method="POST")
-            with request.urlopen(req, timeout=10):
-                return True
-        except Exception:
-            time.sleep(2 ** i)
+            req = request.Request(url, data=body, headers=headers, method="POST")
+            with request.urlopen(req, timeout=timeout) as resp:
+                code = getattr(resp, "status", 200)
+                if 200 <= code < 300:
+                    return True
+        except error.HTTPError as exc:
+            LOG.warning("webhook http error url=%s code=%s attempt=%d/%d", url, exc.code, attempt, retries)
+        except Exception as exc:
+            LOG.warning("webhook transport error url=%s err=%s attempt=%d/%d", url, exc, attempt, retries)
+        if attempt < retries:
+            time.sleep(backoff_base ** (attempt - 1))
    return False


+def iter_new_incidents(aw_base: str, state: dict[str, Any], per_bucket_limit: int) -> tuple[list[dict[str, Any]], dict[str, int]]:
+    buckets = http_json(f"{aw_base}/buckets/")
+    bucket_ids = sorted([bid for bid in buckets.keys() if bid.startswith("aw-dlp-incidents_")])
+    last_ids = state.get("last_ids", {})
+    if not isinstance(last_ids, dict):
+        last_ids = {}
+    max_ids: dict[str, int] = {}
+    out: list[dict[str, Any]] = []
+    for bid in bucket_ids:
+        events = http_json(f"{aw_base}/buckets/{bid}/events?limit={int(per_bucket_limit)}")
+        prev = int(last_ids.get(bid, 0))
+        bucket_max = prev
+        for ev in events:
+            eid = int(ev.get("id") or 0)
+            if eid <= prev:
+                continue
+            out.append(ev)
+            if eid > bucket_max:
+                bucket_max = eid
+        max_ids[bid] = bucket_max
+    out.sort(key=lambda x: int(x.get("id") or 0))
+    return out, max_ids
+
+
+def should_send(severity: str, allowed: list[str]) -> bool:
+    return severity.lower() in {s.lower() for s in allowed}
+
+
 def main() -> None:
-    hooks = [h.strip() for h in os.environ.get("AW_DLP_CRITICAL_WEBHOOKS", "").split(",") if h.strip()]
-    payload = {"text": "AWatch DLP critical incident", "severity": "high"}
-    for hook in hooks:
-        post(hook, payload)
+    setup_logging()
+    cfg_path = Path("/opt/activitywatch/dlp-integrations/webhook-config.yaml")
+    cfg = load_yaml(cfg_path)
+    aw_base = str(cfg.get("aw_api_base", "http://127.0.0.1:5600/api/0")).rstrip("/")
+    state_path = Path(str(cfg.get("state_path", "/var/lib/activitywatch/dlp-integrations/webhook-state.json")))
+    retries = int(cfg.get("retries", 4))
+    timeout = int(cfg.get("timeout_sec", 15))
+    backoff_base = float(cfg.get("backoff_base", 2.0))
+    per_bucket_limit = int(cfg.get("per_bucket_limit", 300))
+    hooks = cfg.get("critical_webhooks", [])
+    if not isinstance(hooks, list):
+        hooks = []
+
+    state = load_json(state_path)
+    incidents, max_ids = iter_new_incidents(aw_base=aw_base, state=state, per_bucket_limit=per_bucket_limit)
+
+    sent = 0
+    for ev in incidents:
+        data = ev.get("data") or {}
+        severity = str(data.get("severity") or "low")
+        for hook in hooks:
+            if not isinstance(hook, dict):
+                continue
+            url = str(hook.get("url") or "").strip()
+            if not url:
+                continue
+            allowed = hook.get("severity", ["high"])
+            if isinstance(allowed, str):
+                allowed = [allowed]
+            if not should_send(severity, [str(x) for x in allowed]):
+                continue
+            payload = {
+                "source": "AWatch-rus DLP",
+                "timestamp": ev.get("timestamp"),
+                "event_id": ev.get("id"),
+                "severity": severity,
+                "message": data.get("message"),
+                "ruleId": data.get("ruleId"),
+                "signalType": data.get("signalType"),
+                "hostname": data.get("hostname"),
+                "username": data.get("username"),
+                "action": data.get("action"),
+                "raw": data,
+            }
+            if post_with_retry(url=url, payload=payload, retries=retries, timeout=timeout, backoff_base=backoff_base):
+                sent += 1
+
+    state["last_ids"] = max_ids
+    state["updated_at"] = datetime.now(timezone.utc).isoformat()
+    save_json(state_path, state)
+    LOG.info("Webhook sender done: delivered=%d incidents_seen=%d", sent, len(incidents))


 if __name__ == "__main__":