NRT User added to Microsoft Entra ID Privileged Groups

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Id	70fc7201-f28e-4ba7-b9ea-c04b96701f13
Rulename	NRT User added to Microsoft Entra ID Privileged Groups
Description	This will alert when a user is added to any of the Privileged Groups. For further information on AuditLogs please see https://docs.microsoft.com/azure/active-directory/reports-monitoring/reference-audit-activities. For Administrator role permissions in Microsoft Entra ID please see https://docs.microsoft.com/azure/active-directory/users-groups-roles/directory-assign-admin-roles
Severity	Medium
Tactics	Persistence PrivilegeEscalation
Techniques	T1098 T1078
Required data connectors	AzureActiveDirectory
Kind	NRT
Source Uri	https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/Microsoft Entra ID/Analytic Rules/NRT_UseraddedtoPrivilgedGroups.yaml
Version	1.0.7
Arm template	70fc7201-f28e-4ba7-b9ea-c04b96701f13.json

KQL

let OperationList = dynamic(["Add member to role","Add eligible member to role"]);
let PrivilegedGroups = dynamic(["UserAccountAdmins","PrivilegedRoleAdmins","TenantAdmins","PrivilegedAuthenticationAdmins"]);
AuditLogs
| where Category =~ "RoleManagement"
| where OperationName in~ (OperationList)
| mv-apply TargetResource = TargetResources on 
  (
      where TargetResource.type =~ "User"
      | extend TargetUserPrincipalName = tostring(TargetResource.userPrincipalName),
               modProps = TargetResource.modifiedProperties
  )
| mv-apply Property = modProps on 
  (
      where Property.displayName =~ "Role.WellKnownObjectName"
      | extend DisplayName = trim('"',tostring(Property.displayName)),
               GroupName = trim('"',tostring(Property.newValue))
  )
| extend InitiatingAppId = tostring(InitiatedBy.app.appId)
| extend InitiatingAppName = tostring(InitiatedBy.app.displayName)
| extend InitiatingAppServicePrincipalId = tostring(InitiatedBy.app.servicePrincipalId)
| extend InitiatingAppServicePrincipalName = tostring(InitiatedBy.app.servicePrincipalName)
| extend InitiatingUserPrincipalName = tostring(InitiatedBy.user.userPrincipalName)
| extend InitiatingAadUserId = tostring(InitiatedBy.user.id)
| extend InitiatingIpAddress = tostring(iff(isnotempty(InitiatedBy.user.ipAddress), InitiatedBy.user.ipAddress, InitiatedBy.app.ipAddress))        
| extend InitiatingUserRoles = InitiatedBy.user.roles
| where GroupName in~ (PrivilegedGroups)
// If you don't want to alert for operations from PIM, remove below filtering for MS-PIM.
//| where InitiatingAppName != "MS-PIM" and InitiatingAppName != "MS-PIM-Fairfax"
| project TimeGenerated, AADOperationType, Category, OperationName, AADTenantId, InitiatingUserPrincipalName, InitiatingAadUserId, InitiatingAppName, InitiatingAppId, InitiatingAppServicePrincipalId, InitiatingIpAddress, InitiatingUserRoles, DisplayName, GroupName, TargetUserPrincipalName
| extend InitiatedByName = tostring(split(InitiatingUserPrincipalName,'@',0)[0]), InitiatedByUPNSuffix = tostring(split(InitiatingUserPrincipalName,'@',1)[0])
| extend TargetName = tostring(split(TargetUserPrincipalName,'@',0)[0]), TargetUPNSuffix = tostring(split(TargetUserPrincipalName,'@',1)[0])

YAML

tags:
- DEV-0537
description: |
  'This will alert when a user is added to any of the Privileged Groups.
  For further information on AuditLogs please see https://docs.microsoft.com/azure/active-directory/reports-monitoring/reference-audit-activities.
  For Administrator role permissions in Microsoft Entra ID please see https://docs.microsoft.com/azure/active-directory/users-groups-roles/directory-assign-admin-roles'  
entityMappings:
- fieldMappings:
  - identifier: FullName
    columnName: InitiatingUserPrincipalName
  - identifier: Name
    columnName: InitiatedByName
  - identifier: UPNSuffix
    columnName: InitiatedByUPNSuffix
  entityType: Account
- fieldMappings:
  - identifier: FullName
    columnName: TargetUserPrincipalName
  - identifier: Name
    columnName: TargetName
  - identifier: UPNSuffix
    columnName: TargetUPNSuffix
  entityType: Account
- fieldMappings:
  - identifier: AadUserId
    columnName: InitiatingAadUserId
  entityType: Account
- fieldMappings:
  - identifier: AadUserId
    columnName: InitiatingAppServicePrincipalId
  entityType: Account
- fieldMappings:
  - identifier: Address
    columnName: InitiatingIpAddress
  entityType: IP
query: |
  let OperationList = dynamic(["Add member to role","Add eligible member to role"]);
  let PrivilegedGroups = dynamic(["UserAccountAdmins","PrivilegedRoleAdmins","TenantAdmins","PrivilegedAuthenticationAdmins"]);
  AuditLogs
  | where Category =~ "RoleManagement"
  | where OperationName in~ (OperationList)
  | mv-apply TargetResource = TargetResources on 
    (
        where TargetResource.type =~ "User"
        | extend TargetUserPrincipalName = tostring(TargetResource.userPrincipalName),
                 modProps = TargetResource.modifiedProperties
    )
  | mv-apply Property = modProps on 
    (
        where Property.displayName =~ "Role.WellKnownObjectName"
        | extend DisplayName = trim('"',tostring(Property.displayName)),
                 GroupName = trim('"',tostring(Property.newValue))
    )
  | extend InitiatingAppId = tostring(InitiatedBy.app.appId)
  | extend InitiatingAppName = tostring(InitiatedBy.app.displayName)
  | extend InitiatingAppServicePrincipalId = tostring(InitiatedBy.app.servicePrincipalId)
  | extend InitiatingAppServicePrincipalName = tostring(InitiatedBy.app.servicePrincipalName)
  | extend InitiatingUserPrincipalName = tostring(InitiatedBy.user.userPrincipalName)
  | extend InitiatingAadUserId = tostring(InitiatedBy.user.id)
  | extend InitiatingIpAddress = tostring(iff(isnotempty(InitiatedBy.user.ipAddress), InitiatedBy.user.ipAddress, InitiatedBy.app.ipAddress))        
  | extend InitiatingUserRoles = InitiatedBy.user.roles
  | where GroupName in~ (PrivilegedGroups)
  // If you don't want to alert for operations from PIM, remove below filtering for MS-PIM.
  //| where InitiatingAppName != "MS-PIM" and InitiatingAppName != "MS-PIM-Fairfax"
  | project TimeGenerated, AADOperationType, Category, OperationName, AADTenantId, InitiatingUserPrincipalName, InitiatingAadUserId, InitiatingAppName, InitiatingAppId, InitiatingAppServicePrincipalId, InitiatingIpAddress, InitiatingUserRoles, DisplayName, GroupName, TargetUserPrincipalName
  | extend InitiatedByName = tostring(split(InitiatingUserPrincipalName,'@',0)[0]), InitiatedByUPNSuffix = tostring(split(InitiatingUserPrincipalName,'@',1)[0])
  | extend TargetName = tostring(split(TargetUserPrincipalName,'@',0)[0]), TargetUPNSuffix = tostring(split(TargetUserPrincipalName,'@',1)[0])  
kind: NRT
relevantTechniques:
- T1098
- T1078
requiredDataConnectors:
- connectorId: AzureActiveDirectory
  dataTypes:
  - AuditLogs
name: NRT User added to Microsoft Entra ID Privileged Groups
severity: Medium
version: 1.0.7
OriginalUri: https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/Microsoft Entra ID/Analytic Rules/NRT_UseraddedtoPrivilgedGroups.yaml
status: Available
id: 70fc7201-f28e-4ba7-b9ea-c04b96701f13
tactics:
- Persistence
- PrivilegeEscalation

ARM