Sigma rule: AWS Bedrock Guardrail Deleted

A detection rule from the SigmaHQ repository, shown as its author published it. Dataset version ref-b9490da4f067, updated 2026-07-10T00:00:00.000Z.

Rule

Title
AWS Bedrock Guardrail Deleted
Status
experimental
Level
medium
Author
Marco Pedrinazzi (@pedrinazziM) (InTheCyber)
Date
2026-07-10
File
rules/cloud/aws/cloudtrail/aws_cloudtrail_bedrock_guardrail_deleted.yml
Commit
ccbb0369507f796db0b0ae6854c8a2be471b9d84

Detects deletion of an Amazon Bedrock guardrail, which may indicate attempts to remove
model safety controls and allow unsafe or unauthorized model responses.

Log source

product
aws
service
cloudtrail

Detection

selection:
    eventName: 'DeleteGuardrail'
    eventSource: 'bedrock.amazonaws.com'
condition: selection

False positives (as the rule lists them)

  • Legitimate guardrail deletion by authorized identities.

Tags

  • attack.defense-impairment
  • attack.t1685

MITRE ATT&CK ids this rule names

References

Read on 2026-11-03T00:58:21.399Z under licence sigma-drl-1.1@d5f4c36a from https://github.com/SigmaHQ/sigma/blob/ccbb0369507f796db0b0ae6854c8a2be471b9d84/rules/cloud/aws/cloudtrail/aws_cloudtrail_bedrock_guardrail_deleted.yml

Sources and licences

  • SigmaHQ

    "AWS Bedrock Guardrail Deleted" by Marco Pedrinazzi (@pedrinazziM) (InTheCyber) (SigmaHQ). Rule: https://github.com/SigmaHQ/sigma/blob/ccbb0369507f796db0b0ae6854c8a2be471b9d84/rules/cloud/aws/cloudtrail/aws_cloudtrail_bedrock_guardrail_deleted.yml.
    Licensed under the Detection Rule License (DRL) 1.1: https://github.com/SigmaHQ/Detection-Rule-License

    Detection Rule License (DRL) 1.1

Cite this page

Dragons Eye Ransomware Tracker, "Sigma rule: AWS Bedrock Guardrail Deleted",
entity page, dataset version ref-b9490da4f067, updated 2026-07-10T00:00:00.000Z,
https://ransomware-tracker.com/detections/sigma/59b70e4d-dd17-44a9-b740-acf07ae3eb6a (accessed 2026-11-03).
Underlying source: SigmaHQ rule 59b70e4d-dd17-44a9-b740-acf07ae3eb6a, commit ccbb0369507f796db0b0ae6854c8a2be471b9d84.

Pages change. The dataset version identifies the data, but no archive of old versions is kept, so this citation cannot be replayed later.