Microsoft Foundry Content Filter Modified or Deleted

Last updated 5 days ago on 2026-10-23

Created 5 days ago on 2026-10-23

About

Identifies the creation, modification, or deletion of a content filter (RAI policy) or a custom blocklist on a Microsoft Foundry (Azure AI Services) account. Content filters decide which prompt and completion categories, jailbreak attempts, and protected material a model deployment blocks. An adversary with control of the account can weaken or remove these filters so that harmful prompts and outputs are no longer blocked or logged as filtered, which removes a guardrail and the detections that depend on its verdicts.

Tags

Domain: CloudDomain: GenAIData Source: AzureData Source: Azure Activity LogsData Source: Microsoft FoundryPlatform: AzureUse Case: Threat DetectionTactic: Defense EvasionRule Type: Custom Query (KQL)Language: kuery

Severity

medium

Risk Score

MITRE ATT&CK™

Defense Evasion (TA0005)(external, opens in a new tab or window)

↳ Impair Defenses (T1562)(external, opens in a new tab or window)

False Positive Examples

AI platform administrators tuning content filter thresholds or blocklists for a new use case. Confirm the change with the account owner and change records. Infrastructure-as-code deployments that recreate RAI policies on every release. Add exceptions for the service principals that run these pipelines.

License

Elastic License v2(external, opens in a new tab or window)

Definition

Rule Type: Query (Kibana Query Language)
Integration Pack: Prebuilt Security Detection Rules
Index Patterns: logs-azure.activitylogs-*
Related Integrations: azure(external, opens in a new tab or window)
Query

✄𐘗text code block:
✄𐘗data_stream.dataset: "azure.activitylogs" and
azure.activitylogs.operation_name: (
    "MICROSOFT.COGNITIVESERVICES/ACCOUNTS/RAIPOLICIES/WRITE" or
    "MICROSOFT.COGNITIVESERVICES/ACCOUNTS/RAIPOLICIES/DELETE" or
    "MICROSOFT.COGNITIVESERVICES/ACCOUNTS/RAIBLOCKLISTS/WRITE" or
    "MICROSOFT.COGNITIVESERVICES/ACCOUNTS/RAIBLOCKLISTS/DELETE"
) and event.outcome: "success"

Install detection rules in Elastic Security

Detect Microsoft Foundry Content Filter Modified or Deleted in the Elastic Security detection engine by installing this rule into your Elastic Stack.

To setup this rule, check out the installation guide for Prebuilt Security Detection Rules(external, opens in a new tab or window).