Detection rules › Kusto

Conditional Access - A Conditional Access policy was put into report-only mode

Severity
low
Time window
5m
Source
github.com/Azure/Azure-Sentinel

A Conditional Access policy was put into report-only mode in Entra ID.

MITRE ATT&CK coverage

Event coverage

Rule body kusto

id: 5588de32-73b1-40b9-bddc-4d9e74051859
name: Conditional Access - A Conditional Access policy was put into report-only mode
version: 1.0.1
kind: Scheduled
description: A Conditional Access policy was put into report-only mode in Entra ID.
severity: Low
requiredDataConnectors:
  - connectorId: AzureActiveDirectory
    dataTypes:
      - AuditLogs
queryFrequency: 5m
queryPeriod: 5m
triggerOperator: gt
triggerThreshold: 0
tactics:
- DefenseEvasion
relevantTechniques:
  - T1562.007
query: |+
  // A Conditional Access policy was put into report-only mode.
  AuditLogs
  | where OperationName in ("Update conditional access policy")
  | extend stateOld = extractjson("$.state", tostring(TargetResources[0].modifiedProperties[0].oldValue))
  | extend stateNew = extractjson("$.state", tostring(TargetResources[0].modifiedProperties[0].newValue))
  | where stateOld == "enabled" and stateNew == "enabledForReportingButNotEnforced"
  | extend modifiedBy = tostring(InitiatedBy.user.userPrincipalName)
  | extend accountName = tostring(split(modifiedBy, "@")[0])
  | extend upnSuffix = tostring(split(modifiedBy, "@")[1])
  | project
      TimeGenerated,
      OperationName,
      policy = TargetResources[0].displayName,
      modifiedBy,
      accountName,
      upnSuffix,
      result = Result,
      stateOld,
      stateNew
  | order by TimeGenerated desc
entityMappings:
- entityType: Account
  fieldMappings:
  - identifier: Name
    columnName: accountName
  - identifier: UPNSuffix
    columnName: upnSuffix
suppressionEnabled: false
suppressionDuration: 5h
eventGroupingSettings:
  aggregationKind: AlertPerResult
incidentConfiguration:
  createIncident: true
  groupingConfiguration:
    enabled: false
    reopenClosedIncident: false
    lookbackDuration: PT5M
    matchingMethod: AllEntities
    groupByEntities: []
    groupByAlertDetails: []
    groupByCustomDetails: []

Stages and Predicates

Stage 1: source

AuditLogs

Stage 2: where

| where OperationName in ("Update conditional access policy")

Stage 3: extend

| extend stateOld = extractjson("$.state", tostring(TargetResources[0].modifiedProperties[0].oldValue))

Stage 4: extend

| extend stateNew = extractjson("$.state", tostring(TargetResources[0].modifiedProperties[0].newValue))

Stage 5: where

| where stateOld == "enabled" and stateNew == "enabledForReportingButNotEnforced"

Stage 6: extend (3 consecutive steps)

| extend modifiedBy = tostring(InitiatedBy.user.userPrincipalName)
| extend accountName = tostring(split(modifiedBy, "@")[0])
| extend upnSuffix = tostring(split(modifiedBy, "@")[1])

Stage 7: project

| project
    TimeGenerated,
    OperationName,
    policy = TargetResources[0].displayName,
    modifiedBy,
    accountName,
    upnSuffix,
    result = Result,
    stateOld,
    stateNew

Stage 8: sort

| order by TimeGenerated desc

Indicators

Each row is a field, operator, and value that the rule matches. The corpus column counts how many other rules in the catalog look for the same combination: high numbers point to widely-used, community-vetted indicators. Blank or 1 shows that the indicator is specific to this rule.

FieldKindValues
OperationNamein
  • Update conditional access policy transforms: cased
stateNeweq
  • enabledForReportingButNotEnforced transforms: cased
stateOldeq
  • enabled transforms: cased

Output fields

Fields the rule emits when it matches. Chronicle authors list these in the outcome block; they appear on the detection and $risk_score drives alerting. Sentinel / Defender XDR rules build them up through project / summarize / extend stages. Sentinel maps these into alert fields via entityMappings and customDetails; Defender XDR custom detections surface them as alert fields directly.

FieldSource
OperationNameproject
TimeGeneratedproject
accountNameproject
modifiedByproject
policyproject
resultproject
stateNewproject
stateOldproject
upnSuffixproject