Short answer: Classify each incident action by its immediate purpose: contain the active risk, investigate what happened, validate whether the response worked, or recover normal operations. The labels should guide sequencing, ownership, evidence, and approval, not become a rigid substitute for judgement.
Why the action type matters
Incident tickets often mix urgent protection work with fact finding and service restoration. That makes it difficult to answer basic questions: what reduced exposure, what established the facts, what proved the risk was controlled, and what changed the environment?
A purpose label gives each action a place in the response record. It also helps the incident owner spot a queue made only of investigation tasks when containment is still incomplete, or recovery tasks that started before validation.
The four action types
Containment actions
Containment reduces current exposure or limits spread. Examples include isolating a device, disabling a compromised account, blocking a known malicious indicator, or restricting a vulnerable service.
Containment is about reducing immediate risk. It is not proof of root cause and it is not the same as permanent remediation.
Investigation actions
Investigation actions gather or test facts. Examples include reviewing identity logs, comparing affected and unaffected hosts, checking a suspicious mailbox rule, or testing a hypothesis about the initial access path.
An investigation action should say what question it will answer and what evidence will be attached.
Validation actions
Validation checks whether the response result is real and sufficient. Examples include confirming that suspicious activity stopped across the agreed data sources, testing that a control blocks the known path, or checking that restored services behave normally.
Validation is not a second name for investigation. It has a defined expected result and a decision boundary.
Recovery actions
Recovery returns systems, accounts, or business processes to an approved operating state. Examples include restoring a known-good service, re-enabling an account after review, rotating credentials, or removing temporary access restrictions.
Recovery should include monitoring and a rollback or escalation condition where a change could reintroduce risk.
Use labels without forcing a false sequence
Real incidents do not always move through four clean blocks. An investigation may reveal a new indicator that requires another containment action. A validation check may show that recovery must pause. That is normal.
Use the labels to explain purpose while allowing actions to interleave:
- Contain the known exposure.
- Investigate scope and cause in parallel.
- Validate the containment result.
- Recover only after the owner approves the recovery conditions.
- Revalidate after recovery and record any residual risk.
Each transition should be supported by facts and an explicit decision, not only by elapsed time.
Example action register
| Type | Action | Owner | Evidence of completion |
|---|---|---|---|
| Containment | Disable the suspected account and revoke active sessions | Identity team | Identity-provider events |
| Investigation | Search sign-in and mailbox logs for the agreed window | Security lead | Query and result export |
| Validation | Confirm no new successful sessions appear after revocation | Security lead | Follow-up query |
| Recovery | Re-enable access after credential reset and manager approval | Identity team | Approval and change record |
This structure makes it possible to report both the current state and the evidence behind it.
IncidentAI can help organise action records, owners, timelines, and summaries. It does not choose the correct containment method, approve recovery, or replace technical and business judgement.
FAQ
Is eradication a fifth action type?
It can be tracked as its own local label when the team needs to distinguish removal of the cause from containment and recovery. For a smaller taxonomy, record eradication under investigation or recovery with a specific action description.
Can one action have two labels?
Prefer one primary purpose. If an action genuinely has two outcomes, split it so each outcome has its own owner and completion test.