Insider Risk_Risky User Access By Application

SigninLogs
| where RiskState == "atRisk"
| project UserPrincipalName, Location, AppDisplayName, RiskState
| evaluate basket(0.01) // Adjust & Tune Thresholds within Organzational Requirements
// | where Percent > 50 // Adjust & Tune Thresholds within Organzational Requirements
| where UserPrincipalName <> ""
| where AppDisplayName <> ""
| project Percent, UserPrincipalName, Location, AppDisplayName, RiskState
// | lookup kind=inner _GetWatchlist('<Your Watchlist Name>') on $left.UserPrincipalName == $right.SearchKey
| sort by Percent desc
| extend AccountName = tostring(split(UserPrincipalName, "@")[0]), AccountUPNSuffix = tostring(split(UserPrincipalName, "@")[1])

name: Insider Risk_Risky User Access By Application
severity: Medium
description: |
    'This alert evaluates Microsoft Entra ID Sign in risk via Machine Learning correlations in the basket operator. The basket threshold is adjustable, and the default is set to .01. There is an optional configuration to configure the percentage rates. The correlations are designed to leverage machine learning to identify patterns of risky user application access. There is an option for configuration of correlations against Microsoft Sentinel watchlists. For more information, see [Tutorial: Use risk detections for user sign-ins to trigger Microsoft Entra ID Multi-Factor Authentication or password changes](https://docs.microsoft.com/azure/active-directory/authentication/tutorial-risk-based-sspr-mfa)'
version: 1.1.4
requiredDataConnectors:
- dataTypes:
  - SigninLogs
  connectorId: AzureActiveDirectory
relevantTechniques:
- T1204
entityMappings:
- entityType: Account
  fieldMappings:
  - identifier: FullName
    columnName: UserPrincipalName
  - identifier: Name
    columnName: AccountName
  - identifier: UPNSuffix
    columnName: AccountUPNSuffix
triggerThreshold: 0
tactics:
- Execution
queryPeriod: 6h
incidentConfiguration:
  groupingConfiguration:
    matchingMethod: Selected
    lookbackDuration: 3d
    enabled: true
    reopenClosedIncident: true
    groupByEntities:
    - Account
  createIncident: true
kind: Scheduled
triggerOperator: gt
query: |
  SigninLogs
  | where RiskState == "atRisk"
  | project UserPrincipalName, Location, AppDisplayName, RiskState
  | evaluate basket(0.01) // Adjust & Tune Thresholds within Organzational Requirements
  // | where Percent > 50 // Adjust & Tune Thresholds within Organzational Requirements
  | where UserPrincipalName <> ""
  | where AppDisplayName <> ""
  | project Percent, UserPrincipalName, Location, AppDisplayName, RiskState
  // | lookup kind=inner _GetWatchlist('<Your Watchlist Name>') on $left.UserPrincipalName == $right.SearchKey
  | sort by Percent desc
  | extend AccountName = tostring(split(UserPrincipalName, "@")[0]), AccountUPNSuffix = tostring(split(UserPrincipalName, "@")[1])  
eventGroupingSettings:
  aggregationKind: SingleAlert
queryFrequency: 6h
OriginalUri: https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/MicrosoftPurviewInsiderRiskManagement/Analytic Rules/InsiderRiskyAccessByApplication.yaml
id: 15386bba-dc70-463f-a09f-d392e7731c63