> For the complete documentation index, see [llms.txt](https://cortex-docs.paloaltonetworks.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://cortex-docs.paloaltonetworks.com/analytics-alerts/alerts-by-name/bucket-s-object-ownership-controls-were-modified.md).

# Bucket's object ownership controls were modified

### Synopsis

| Field                | Value                                  |
| -------------------- | -------------------------------------- |
| Activation Period    | 14 Days                                |
| Training Period      | 30 Days                                |
| Test Period          | N/A (single event)                     |
| Deduplication Period | 1 Day                                  |
| Required Data        | AWS Audit Log                          |
| Detection Modules    | Cloud                                  |
| Detector Tags        | Data Detection & Response              |
| ATT\&CK Tactic       | Exfiltration (TA0010)                  |
| ATT\&CK Technique    | Transfer Data to Cloud Account (T1537) |
| Severity             | Low                                    |

### Description

S3 bucket object ownership controls were modified.

### Attacker's Goals

Maintain control and access to data that resides inside the S3 bucket.

### Investigative actions

* Check if {cloud\_best\_identity\_match} intended to modify bucket's object ownership.
* Check if the {aws\_s3bucket\_identifier} bucket contains any sensitive information.


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