# seahaven-account-baseline

Account-level security and governance baseline for Sea Haven Industries
(AWS account **328440206208**, region **us-east-1**), managed as a single CDK
TypeScript app. This is where account-wide detective controls live, so they are
versioned, reviewed, and drift-checked like any other stack.

## What it deploys

### CloudTrail (audit finding C-1)

| Resource | Logical ID | Notes |
|---|---|---|
| Multi-region trail | `Trail` (`seahaven-org-trail`) | Management events read+write, global service events, **log-file validation on** |
| Log bucket | `TrailLogBucket` (`seahaven-cloudtrail-logs-328440206208`) | Private (Block Public Access all), SSE-KMS, versioned, **TLS-only**, **Object Lock GOVERNANCE 365d**, lifecycle (Glacier @90d, expire @365d), server access logging → `seahaven-s3-access-logs` |
| KMS CMK | `TrailKey` (`alias/cloudtrail-logs`) | Encrypts log files; **automatic rotation enabled** |
| CloudWatch Logs group | created by the L2 `Trail` | 365-day retention; this is the group the CIS Section 4 metric filters (H-1) attach to |

**Data flow:** API activity across all regions → CloudTrail → (a) KMS-encrypted,
Object-Locked S3 bucket for durable/tamper-resistant storage and (b) CloudWatch
Logs for real-time querying and metric-filter alarms.

**Compliance impact:** closes CIS 3.1 (multi-region trail), 3.2 (log-file
validation), 3.4 (CloudWatch Logs integration), 3.6 (bucket access logging),
3.7 (KMS CMK encryption), and 3.8 (CMK rotation). Unblocks CIS Section 4 /
finding H-1 (metric filters + alarms now have a log group to target).

### Design decisions

- **Management events only.** Object-level S3/Lambda data events (CIS 3.10/3.11)
  are deferred to control cost; revisit with targeted S3 *write* data events on
  sensitive buckets (payments / accounting / kb) if needed.
- **Object Lock GOVERNANCE, not COMPLIANCE.** Tamper-resistant but still
  deletable by a principal holding `s3:BypassGovernanceRetention` — avoids the
  irreversibility of COMPLIANCE mode. Revisit if a stricter posture is required.
- **RETAIN** on the bucket and KMS key so a stack teardown never destroys the
  audit trail.

## Roadmap (same stack)

Account-level detective controls with no current home, to be added here:
AWS Config (H-2), GuardDuty (H-3), Security Hub (H-4), IAM Access Analyzer
(M-5), Inspector2 (M-6).

## Deploy

CI/CD via the org reusable workflows (`ci-typescript-cdk.yaml`,
`cd-cdk.yaml`); pushes to `main` deploy through the OIDC role in
`secrets.AWS_DEPLOY_ROLE_ARN`. Local: `npm ci && npm run build && npx cdk diff`.

```
npx cdk deploy seahaven-account-baseline
```

## Verify

```
aws cloudtrail get-trail-status --name seahaven-org-trail        # IsLogging: true
aws cloudtrail describe-trails --trail-name-list seahaven-org-trail
aws cloudtrail validate-logs --trail-arn <arn> --start-time <t>  # digest integrity
```