Sigma rule: AWS GuardDuty Detector Deleted Or Updated

Rule

Title

AWS GuardDuty Detector Deleted Or Updated

Status

experimental

Level

high

Author

suktech24

Date

2025-11-27

File

rules/cloud/aws/cloudtrail/aws_cloudtrail_guardduty_detector_deleted_or_updated.yml

Commit

ccbb0369507f796db0b0ae6854c8a2be471b9d84

Detects successful deletion or disabling of an AWS GuardDuty detector, possibly by an attacker trying to avoid detection of its malicious activities.
Upon deletion, GuardDuty stops monitoring the environment and all existing findings are lost.
Verify with the user identity that this activity is legitimate.

Log source

product

aws

service

cloudtrail

Detection

selection_event_source:
    eventSource: 'guardduty.amazonaws.com'
selection_action_delete:
    eventName: 'DeleteDetector'
selection_action_update:
    eventName: 'UpdateDetector'
    requestParameters.enable: 'false'
selection_status_success:
    errorCode: 'Success'
selection_status_null:
    errorCode: null
condition: selection_event_source and 1 of selection_action_* and 1 of selection_status_*

False positives (as the rule lists them)

• Legitimate detector deletion by an admin (e.g., during account decommissioning).
• Temporary disablement for troubleshooting (verify via change management tickets).
• Automated deployment tools (e.g. Terraform) managing GuardDuty state.

Tags

• attack.defense-impairment
• attack.t1685
• attack.t1685.002

MITRE ATT&CK ids this rule names

• T1685
• T1685.002

References

• https://docs.aws.amazon.com/guardduty/latest/APIReference/API_DeleteDetector.html
• https://docs.aws.amazon.com/guardduty/latest/APIReference/API_UpdateDetector.html
• https://docs.aws.amazon.com/guardduty/latest/ug/guardduty_suspend-disable.html
• https://docs.datadoghq.com/security/default_rules/719-39f-9cd/
• https://docs.prismacloud.io/en/enterprise-edition/policy-reference/aws-policies/aws-general-policies/ensure-aws-guardduty-detector-is-enabled
• https://docs.stellarcyber.ai/5.2.x/Using/ML/Alert-Rule-Based-Potentially_Malicious_AWS_Activity.html
• https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/Amazon%20Web%20Services/Analytic%20Rules/AWS_GuardDutyDisabled.yaml
• https://github.com/elastic/detection-rules/blob/main/rules/integrations/aws/defense_evasion_guardduty_detector_deletion.toml
• https://help.fortinet.com/fsiem/Public_Resource_Access/7_4_0/rules/PH_RULE_AWS_GuardDuty_Detector_Deletion.htm
• https://research.splunk.com/sources/5d8bd475-c8bc-4447-b27f-efa508728b90/
• https://suktech24.com/2025/07/17/aws-threat-detection-rule-guardduty-detector-disabled-or-suspended/
• https://www.atomicredteam.io/atomic-red-team/atomics/T156001#atomic-test-46---aws---guardduty-suspension-or-deletion

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_guardduty_detector_deleted_or_updated.yml