GCP Security Command Center - Detect Resources with Logging Disabled

Status: available
Severity: medium
Time window: 1h
Source: github.com/Azure/Azure-Sentinel

Detects Google Cloud resources where logging is disabled for services like (Cloud Storage buckets, Firewall rules, Cloud DNS networks) based on Google Cloud Security Command Center findings.

MITRE ATT&CK coverage

Tactic	Techniques
Defense Impairment	`T1685` Disable or Modify Tools

Rule body

id: d1fe8d30-4852-463a-b6ee-3b459788b75d
name: GCP Security Command Center - Detect Resources with Logging Disabled
description: |
  Detects Google Cloud resources where logging is disabled for services like (Cloud Storage buckets, Firewall rules, Cloud DNS networks) based on Google Cloud Security Command Center findings.
severity: Medium
status: Available
requiredDataConnectors:
  - connectorId: GoogleSCCDefinition
    dataTypes:
      - GoogleCloudSCC
queryFrequency: 1h
queryPeriod: 1h
triggerOperator: gt
triggerThreshold: 0
tactics:
  - DefenseEvasion
relevantTechniques:
  - T1562
tags:
  - Logging
  - GCP
query: |
  GoogleCloudSCC
  | where tostring(Findings.state) == "ACTIVE"
  | extend FindingCategory = tostring(Findings.category)
  | where FindingCategory in ("BUCKET_LOGGING_DISABLED", "FIREWALL_RULE_LOGGING_DISABLED", "DNS_LOGGING_DISABLED")
  | extend FindingsJson = parse_json(Findings)
  | extend Resource = tostring(FindingsJson.resourceName),
           ExternalUri = tostring(FindingsJson.externalUri),
           Description = tostring(FindingsJson.description),
           Severity = tostring(FindingsJson.severity),
           ProjectName = extract(@"projects/([^/]+)", 1, tostring(FindingsJson.resourceName)),
           ResourceType = extract(@"//([a-z0-9_.-]+)/", 1, tostring(FindingsJson.resourceName)),
           SourceProps = parse_json(tostring(FindingsJson.sourceProperties))
  // Normalize display-friendly resource id
  | extend ResourceName = case(
      Resource contains "firewalls/", extract(@"firewalls/([^/]+)", 1, Resource),
      Resource contains "storage.googleapis.com/", extract(@'storage.googleapis.com/([^/\"]+)', 1, Resource),
      Resource contains "networks/", extract(@"networks/([^/]+)", 1, Resource),
      Resource
    )
  | project TimeGenerated, ProjectName, ResourceType, ResourceName, Resource, FindingCategory, Severity, ExternalUri, Description
entityMappings:
  - entityType: CloudApplication
    fieldMappings:
      - identifier: Name
        columnName: ResourceName
customDetails:
  ProjectName: ProjectName
  ResourceType: ResourceType
  FindingCategory: FindingCategory
  ExternalUri: ExternalUri
  Description: Description
  Severity: Severity
eventGroupingSettings:
  aggregationKind: AlertPerResult
alertDetailsOverride:
  alertDisplayNameFormat: "GCP resources with logging disabled: {{ProjectName}} ({{ResourceType}})"
  alertDescriptionFormat: |-
    Resource {{ResourceName}} in project {{ProjectName}} (type: {{ResourceType}}) has logging disabled.
version: 1.0.0
kind: Scheduled

Stages and Predicates

Stage 1: `source`

GoogleCloudSCC

Stage 2: `where`

| where tostring(Findings.state) == "ACTIVE"

Stage 3: `extend`

| extend FindingCategory = tostring(Findings.category)

Stage 4: `where`

| where FindingCategory in ("BUCKET_LOGGING_DISABLED", "FIREWALL_RULE_LOGGING_DISABLED", "DNS_LOGGING_DISABLED")

Stage 5: `extend` (3 consecutive steps)

| extend FindingsJson = parse_json(Findings)
| extend Resource = tostring(FindingsJson.resourceName),
         ExternalUri = tostring(FindingsJson.externalUri),
         Description = tostring(FindingsJson.description),
         Severity = tostring(FindingsJson.severity),
         ProjectName = extract(@"projects/([^/]+)", 1, tostring(FindingsJson.resourceName)),
         ResourceType = extract(@"//([a-z0-9_.-]+)/", 1, tostring(FindingsJson.resourceName)),
         SourceProps = parse_json(tostring(FindingsJson.sourceProperties))
| extend ResourceName = case(
    Resource contains "firewalls/", extract(@"firewalls/([^/]+)", 1, Resource),
    Resource contains "storage.googleapis.com/", extract(@'storage.googleapis.com/([^/\"]+)', 1, Resource),
    Resource contains "networks/", extract(@"networks/([^/]+)", 1, Resource),
    Resource
  )

Stage 6: `project`

| project TimeGenerated, ProjectName, ResourceType, ResourceName, Resource, FindingCategory, Severity, ExternalUri, Description

Indicators

These rows show field, operator, and value matches.

Field	Kind	Values	Search
`FindingCategory`	in	`BUCKET_LOGGING_DISABLED` `DNS_LOGGING_DISABLED` `FIREWALL_RULE_LOGGING_DISABLED`	`field:"FindingCategory" kind:in`
`state`	eq	`ACTIVE` transforms: `tostring`	`field:"state" kind:eq value:"ACTIVE"`

Output fields

These fields are emitted when the rule matches.

Field	Source
`Description`	`project`
`ExternalUri`	`project`
`FindingCategory`	`project`
`ProjectName`	`project`
`Resource`	`project`
`ResourceName`	`project`
`ResourceType`	`project`
`Severity`	`project`
`TimeGenerated`	`project`

GCP Security Command Center - Detect Resources with Logging Disabled

MITRE ATT&CK coverage

Rule body

Stages and Predicates

Stage 1: source

Stage 2: where

Stage 3: extend

Stage 4: where

Stage 5: extend (3 consecutive steps)

Stage 6: project