# NIST SP 800-53 Rev. 5 SI-4(7) — Automated Response To Suspicious Events

- Source: https://support.icompaas.com/compliance/nist-sp-800-53-rev-5/si-4-7-automated-response-to-suspicious-events
- Section: [Compliance](https://support.icompaas.com/compliance) › [NIST SP 800-53 Rev. 5 Controls](https://support.icompaas.com/compliance/nist-sp-800-53-rev-5) › SI — System and Information Integrity
- Last updated: 2026-06-05
- Publisher: iCompaas, Inc. (https://www.icompaas.com)

**NIST SP 800-53 Rev. 5**·Control `SI-4(7)`·high·Component: **System and Information Integrity**

## What this control requires

> Notify designated incident response personnel of detected suspicious events and take least-disruptive actions to terminate suspicious events upon detection. This control supports the Security Information and Event Management (SIEM) Systems, Automated Response Mechanisms capability within the System and Information Integrity family.
> 
> — NIST SP 800-53 Rev. 5, Control SI-4(7)

### In plain English

Notify designated incident response personnel of detected suspicious events and take least-disruptive actions to terminate suspicious events upon detection. In practice, this means you can prove you information management-level controls on a defined cadence.

## Why it matters

SP 800-53 is the catalogue every U.S. federal authorisation (FedRAMP, FISMA, CMMC) and most regulated industries point at. A missing control surfaces as a Plan of Action & Milestones (POA&M) item that an Authorizing Official must approve before the Authority To Operate is granted or renewed.

This control is rated **high**. Auditors expect a named owner, a remediation SLA, and a tooling artefact that evidences continuous operation.

## What an auditor looks for

A 3PAO (FedRAMP) or Independent Assessor (NIST RMF) tests against NIST SP 800-53A assessment procedures. For each control they expect a documented implementation that addresses every assessment objective (Examine, Interview, Test) and an implementation summary in the System Security Plan.

Within **System and Information Integrity**, the assessor will trace your implementation back to the catalogue reference (Control SI-4(7)) and look for objective evidence on the latest two assessment cycles.

## How to implement

#### Incident Response

**Runbook.** Maintain a runbook keyed by incident type with named roles (IC, comms, scribe), an out-of-band comms channel, and a 72-hour timeline for external notification.

**Tabletop.** Run a quarterly tabletop exercise (ransomware, insider, supply-chain) and feed gaps back into the runbook.

### Operational checklist

-   **Information.** Document the trigger, the owner and the cadence.
-   **Security.** Document the trigger, the owner and the cadence.
-   **Detection.** Document the trigger, the owner and the cadence.
-   **Least.** Document the trigger, the owner and the cadence.
-   **Suspicious.** Document the trigger, the owner and the cadence.
-   **Scope:** management, actions, information, system, personnel, events, capability, systems.

## Evidence to collect

-   **Ticketing Workflow.** `ticketing_workflow` evidence

Workflow metrics (ServiceNow, Jira) show approvals and remediation. Focus: Automated Response To Suspicious Events.

## Common pitfalls

-   Runbooks that name a role but no person, or list a paging channel that no longer exists.

## How it maps to other frameworks

Computed from shared tags, control component and key-operation subjects — handy when you are reconciling controls across an audit.

-   [**ISO/IEC 27001:2022 A.5.27** — Learning from information security incidents](https://support.icompaas.com/compliance/iso-27001-2022/a-5-27-learning-from-information-security-incidents)
-   [**SOC 2 (2017 TSC) CC7.3** — Incident Detection](https://support.icompaas.com/compliance/soc-2-trust-services-criteria/cc7-3-incident-detection)
-   [**NIST SP 800-171 Rev. 3 3.6.2** — Incident Monitoring, Reporting, and Response Assistance](https://support.icompaas.com/compliance/nist-sp-800-171-rev-3/3-6-2-incident-monitoring-reporting-and-response-assistance)

## Related controls in NIST SP 800-53 Rev. 5

-   [**Control SI-4(24)** — Indicators Of Compromise](https://support.icompaas.com/compliance/nist-sp-800-53-rev-5/si-4-24-indicators-of-compromise)
-   [**Control IR-2(1)** — Simulated Events](https://support.icompaas.com/compliance/nist-sp-800-53-rev-5/ir-2-1-simulated-events)
-   [**Control SI-7(7)** — Integration Of Detection And Response](https://support.icompaas.com/compliance/nist-sp-800-53-rev-5/si-7-7-integration-of-detection-and-response)
-   [**Control SI-20** — Tainting](https://support.icompaas.com/compliance/nist-sp-800-53-rev-5/si-20-tainting)
-   [**Control IR-9(2)** — Training](https://support.icompaas.com/compliance/nist-sp-800-53-rev-5/ir-9-2-training)
-   [**Control SI-7(8)** — Auditing Capability For Significant Events](https://support.icompaas.com/compliance/nist-sp-800-53-rev-5/si-7-8-auditing-capability-for-significant-events)

## References

-   [NIST Computer Security Resource Center — NIST SP 800-53 Rev. 5](https://csrc.nist.gov/Projects/risk-management/sp800-53-controls)
-   Catalogue identifier: `Control SI-4(7)`

Topics: incident responsechange management

## Related compliance guidance

- [NIST SP 800-53 Rev. 5: a practical implementation guide for cloud teams](https://support.icompaas.com/compliance/nist-sp-800-53-rev-5): Start with the full NIST SP 800-53 implementation guide — scope, roadmap, evidence and how the assessment runs.
- [NIST SP 800-171 and CMMC: a practical guide to protecting CUI in the cloud](https://support.icompaas.com/compliance/nist-sp-800-171-rev-3): If your obligation is protecting CUI in your own systems for a federal or defence contract, this derived subset — not the full catalogue — is the requirement.
- [SOC 2 compliance: a practical implementation guide for cloud-native SaaS teams](https://support.icompaas.com/compliance/soc-2-trust-services-criteria): Most commercial SaaS already hold a SOC 2 Type 2, and FedRAMP 20x Class A is designed for providers that have one.