# T1619 - Cloud Storage Object Discovery

## SOC Recommendation
Investigate Cloud Storage Object Discovery activity in the context of Discovery: confirm scope, affected host/identity, and whether it matches expected administrative behaviour before deciding this is benign.

## D3FEND Mappings
| D3FEND Technique | Relationship | Practical SOC Action |
|---|---|---|
| Disk Encryption | Harden | Apply Disk Encryption to reduce this technique's viability before an incident occurs. |
| Disk Formatting | Evict | Use Disk Formatting to remove the adversary's foothold once this technique is confirmed. |
| Hardware Component Inventory | Model | Use Hardware Component Inventory to establish a baseline that makes this technique's deviations easier to spot. |

## Investigation Steps
1. Review Defender for Endpoint / Defender XDR alerts and timeline for the affected host or identity.
2. Check Sentinel analytics rules and incidents correlated with this technique.
3. Review Entra ID sign-in and audit logs if the technique involves an identity or cloud resource.

## Evidence to Collect
- Host or resource affected
- Account or identity involved
- Timestamp of the activity
- Related process, file, or network artifact
- Any preceding or follow-on alerts

## Response Actions
| Action | Risk | Automation Safe | Approval Required |
|---|---|---|---|
| Contain the affected host or account | Medium | No | Yes |
| Collect and preserve evidence | Low | Yes | No |

## KQL
```kql
TheomAlerts_CL
 | where priority_s == "P1"
```
```kql
TheomAlerts_CL
 | where priority_s == "P2"
```
```kql
TheomAlerts_CL
 | where priority_s == "P4"
```

## Escalation Criteria
- Cloud Storage Object Discovery activity observed on a privileged account or critical system.
- Activity follows or precedes other suspicious behaviour in the same investigation.
- Automated triage cannot confidently rule out malicious intent.

## False Positive Considerations
- Legitimate administrative or maintenance activity matching this pattern.
- Approved security testing or red team exercise.
- Known benign software producing similar telemetry.

Generated by SOC Response Atlas by Basyrix.