Query: write Sigma for Detects global permissions change activity.
Matching passage: Sigma rule: Detects global permissions change activity.. Logsource: bitbucket / audit. Rule: title: Bitbucket Global Permission Changed id: aac6c4f4-87c7-4961-96ac-c3fd3a42c310 status: test description: Detects global permissions change activity. references: - https://confluence.atlassian.com/bitbucketserver/audit-log-events-776640423.html - https://confluence.atlassian.com/bitbucketserver/global-permissions-776640369.html author: Muhammad Faisal (@faisalusuf) date: 2024-02-25 tags: - attack.persistence - attack.privilege-escalation - attack.t1098 logsource: product: bitbucket service: audit definition: 'Requirements: "Advance" log level is required to receive these audit events.' detection: selection: auditType.category: Permissions auditType.action: - Global permission remove request - Global permission removed - Global permission granted - Global permission requested condition: selection falsepositives: - Legitimate user activity. level: medium
Near-miss passage: Sigma rule: Detects successful deletion or disabling of an AWS GuardDuty detector, possibly by an attacker trying to avoid detection. Logsource: aws / cloudtrail. Rule: title: AWS GuardDuty Detector Deleted Or Updated id: d2656e78-c069-4571-8220-9e0ab5913f19 status: experimental description: '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. ' 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 author: suktech24 date: 2025-11-27 tags: - attack.defense-impairment - attack.t1685 - attack.t1685.002 logsource: 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_* falsepositives: - 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. level: high