> 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/foreign-account-was-granted-permissions-to-s3-bucket-via-resource-based-policy.md).
# Foreign account was granted permissions to S3 bucket via resource-based policy
### 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 | Cloud Data Asset Exfiltration, Data Detection & Response |
| ATT\&CK Tactic | Exfiltration (TA0010) |
| ATT\&CK Technique | Transfer Data to Cloud Account (T1537) |
| Severity | Informational |
### Description
Foreign account was granted access to S3 bucket.
### Attacker's Goals
* The attacker wants to maintain control over the resource.
### Investigative actions
* Check if the {cloud\_best\_identity\_match} intended to modify {aws\_s3bucket\_identifier} policy.
* Check the permissions that were granted to the {aws\_grantee\_project}.
* Restrict permissions for the {aws\_grantee\_project} if needed.
### Variations
Foreign account was granted permissions to S3 bucket containing sensitive information via resource-based policy
**Synopsis**
| Field | Value |
| ----------------- | -------------------------------------- |
| ATT\&CK Tactic | Exfiltration (TA0010) |
| ATT\&CK Technique | Transfer Data to Cloud Account (T1537) |
| Severity | Low |
**Description**
Foreign account was granted access to S3 bucket.
**Attacker's Goals**
* The attacker wants to maintain control over the resource.
**Investigative actions**
* Check if the {cloud\_best\_identity\_match} intended to modify {aws\_s3bucket\_identifier} policy.
* Check the permissions that were granted to the {aws\_grantee\_project}.
* Restrict permissions for the {aws\_grantee\_project} if needed.
---
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