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GCP Audit Logs - Data Access Logging Exemption Added for Principal

Voir sur GitHub ↗Fichier original ↗

Description

'Detects when a principal (user or service account) is exempted from GCP data access audit logging. This is a critical security event as it reduces visibility into privileged operations and may indicate an attempt to hide malicious activity. Adversaries may exempt their accounts from audit logging to evade detection while performing reconnaissance, privilege escalation, or data exfiltration. This rule monitors SetIamPolicy operations that add audit log exemptions for ADMIN_READ, DATA_READ, or DATA_WRITE log types.'
Type de règle
Scheduled
Version
1.0.0
Statut déclaré
Available
Fréquence
1h
Période analysée
1h
Déclenchement
gt 0

Couverture MITRE déclarée

DefenseEvasionPrivilegeEscalationT1562.008T1078.004

Sources déclarées

Métadonnées du fichier source. Aucune dépendance déduite du KQL.

Connecteurs

GCPAuditLogsDefinition

Types de données

GCPAuditLogs

Requête KQL

Requête originale, sans modification.

GCPAuditLogs
 | where ServiceName == "cloudresourcemanager.googleapis.com"
 | where MethodName == "SetIamPolicy"
 | where GCPResourceType == "project" and Severity == "NOTICE"
 | where isnotempty(ServiceData)
 | extend ServiceDataJson = parse_json(ServiceData)
 | extend PolicyDelta = ServiceDataJson.policyDelta.auditConfigDeltas
 | where isnotempty(PolicyDelta)
 | mv-expand ConfigDelta = PolicyDelta
 | where ConfigDelta.action == "ADD"
 | extend LogType = tostring(ConfigDelta.logType)
 | where LogType in ("ADMIN_READ", "DATA_READ", "DATA_WRITE")
 | extend 
     ExemptedMember = tostring(ConfigDelta.exemptedMember),
     ServiceAffected = tostring(ConfigDelta.service),
     RequestMetadataJson = parse_json(RequestMetadata),
     AuthInfoJson = parse_json(AuthenticationInfo)
 | where isnotempty(ExemptedMember)
 | extend 
     CallerIpAddress = tostring(RequestMetadataJson.callerIp),
     UserAgent = tostring(RequestMetadataJson.callerSuppliedUserAgent),
     AuthEmail = tostring(AuthInfoJson.principalEmail),
     ExemptedAccountName = tostring(split(ExemptedMember, ":")[1])
 | summarize 
     ExemptedLogTypes = make_set(LogType, 10),
     ExemptedServices = make_set(ServiceAffected, 50),
     FirstExemption = min(TimeGenerated),
     LastExemption = max(TimeGenerated)
     by PrincipalEmail, ProjectId, GCPResourceName, ExemptedMember, 
        CallerIpAddress, UserAgent, LogName, ExemptedAccountName, MethodName, ServiceName, AuthEmail
 | extend
     AccountName = tostring(split(PrincipalEmail, "@")[0]), 
     AccountUPNSuffix = tostring(split(PrincipalEmail, "@")[1])
 | project TimeGenerated = LastExemption,
     PrincipalEmail,
     ProjectId,
     ResourceName = GCPResourceName,
     ExemptedMember,
     ExemptedAccountName,
     ExemptedLogTypes,
     ExemptedServices,
     FirstExemption,
     LastExemption,
     CallerIpAddress,
     UserAgent,
     AuthEmail,
     MethodName,
     ServiceName,
     LogName,
     AccountName,
     AccountUPNSuffix

Entités déclarées

AccountIPCloudApplication

Contenus associés

Liens établis à partir des identifiants déclarés et des manifests des solutions.

Solutions1
Connecteurs1

Traçabilité de la source

GitHub

Les valeurs affichées proviennent des fichiers du dépôt Azure/Azure-Sentinel. Elles décrivent le modèle publié, pas la configuration de votre workspace.

Identifiant source
b7da45ce-fcc8-43c7-a37c-c08454579d26
Autres fichiers source 2Solutions/Google Cloud Platform Audit Logs/Analytic Rules/GCPDataAccessLoggingExemption.yamlsource ↗Solutions/Google Cloud Platform Audit Logs/Data/Solution_GCPAuditLogs.jsonsolution-membership ↗
GSTEP / SUIVI DU CATALOGUE

Ajouté au catalogue : 16 sept. 2026 · 05:49 UTC
Dernier changement observé : 16 sept. 2026 · 05:49 UTC

Dates de synchronisation GSTEP, distinctes des dates de publication du contenu source.