Convert indexed Sigma rules into analyst-ready detections.
This studio is built around Phoenix's own rule corpus, not a blank editor. Search by title or rule id, choose a local pySigma backend, then reveal pipelines only when you actually need them.
Indexed Rules
3,779
Ready to search
Backends
3
Loaded from pysigma-node
pySigma Versions
2
Newest: 2.0.1
Translation Workspace
Shape the rule before it leaves Phoenix
Tune Translation
Active Rule
AWS Bedrock Guardrail Updated
Backends follow their supported pySigma version. Select 1.5.1 for Elasticsearch, Kusto, and other 1.x plugins.
Target Profile
Splunk
Splunk through pysigma-backend-splunk.
Format Mode
Default
Default pySigma output mode for this backend.
AWS Bedrock Guardrail Updated
Using Splunk · Default · pySigma 2.0.1
Translation controls
Adjust the rule on the left, then regenerate when you want a fresh backend-native query.
title: AWS Bedrock Guardrail Updated
id: 1c722651-254a-4b04-a9f4-99b62a2d0a1f
status: experimental
description: |
Detects updates to an Amazon Bedrock guardrail, which may indicate attempts to weaken
model safety controls and allow unsafe or unauthorized model responses.
references:
- https://docs.aws.amazon.com/bedrock/latest/APIReference/API_UpdateGuardrail.html
author: Marco Pedrinazzi (@pedrinazziM) (InTheCyber)
date: 2026-07-10
tags:
- attack.defense-impairment
- attack.t1685
logsource:
product: aws
service: cloudtrail
detection:
selection:
eventName: 'UpdateGuardrail'
eventSource: 'bedrock.amazonaws.com'
condition: selection
falsepositives:
- Legitimate guardrail updates by authorized identities.
level: medium
CLI command
Sigma CLI 4.0.0 · Install matching versions, then run from the Phoenix project directory.
python -m pip install 'sigma-cli==4.0.0' 'pysigma==2.0.1' 'pysigma-backend-splunk==3.0.0'
sigma convert --without-pipeline -t splunk -f default 'sigma/rules/cloud/aws/cloudtrail/aws_cloudtrail_bedrock_guardrail_updated.yml'