User Added to Admin Role

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Id	2a09f8cb-deb7-4c40-b08b-9137667f1c0b
Rulename	User Added to Admin Role
Description	Detects a user being added to a new privileged role. Monitor these additions to ensure the users are made eligible for these roles are intended to have these levels of access. Ref: https://docs.microsoft.com/azure/active-directory/fundamentals/security-operations-privileged-accounts#changes-to-privileged-accounts
Severity	Low
Tactics	PrivilegeEscalation
Techniques	T1078.004
Required data connectors	AzureActiveDirectory
Kind	Scheduled
Query frequency	1d
Query period	1d
Trigger threshold	0
Trigger operator	gt
Source Uri	https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/Business Email Compromise - Financial Fraud/Analytic Rules/UserAddedtoAdminRole.yaml
Version	1.0.4
Arm template	2a09f8cb-deb7-4c40-b08b-9137667f1c0b.json

KQL

AuditLogs
  | where OperationName in ("Add eligible member (permanent)", "Add eligible member (eligible)", "Add member to role")
  | mv-apply TargetResource = TargetResources on 
  (
      where TargetResource.type =~ "User"
      | extend Target = tostring(TargetResource.userPrincipalName),
               props = TargetResource.modifiedProperties
  )
  | mv-apply Property = props on 
  (
      where Property.displayName =~ "Role.DisplayName"
      | extend RoleName = trim('"',tostring(Property.newValue))
  )
  | where RoleName contains "admin"
  | extend InitiatingAppName = tostring(InitiatedBy.app.displayName)
  | extend InitiatingAppServicePrincipalId = tostring(InitiatedBy.app.servicePrincipalId)
  | extend InitiatingUserPrincipalName = tostring(InitiatedBy.user.userPrincipalName)
  | extend InitiatingAadUserId = tostring(InitiatedBy.user.id)
  | extend InitiatingIPAddress = tostring(InitiatedBy.user.ipAddress)
  | extend InitiatedBy = iif(isnotempty(InitiatingAppName), InitiatingAppName, InitiatingUserPrincipalName)
  | extend TargetUserPrincipalName = iff(OperationName=="Add member to role",tostring(TargetResources[0].userPrincipalName),tostring(TargetResources[2].userPrincipalName))
  | extend TargetAadUserId = iff(OperationName=="Add member to role", tostring(TargetResources[0].id), tostring(TargetResources[2].id))
  | extend AddedUser = TargetUserPrincipalName
  | extend TargetAccountName = tostring(split(TargetUserPrincipalName, "@")[0]), TargetAccountUPNSuffix = tostring(split(TargetUserPrincipalName, "@")[1])
  | extend InitiatingAccountName = tostring(split(InitiatingUserPrincipalName, "@")[0]), InitiatingAccountUPNSuffix = tostring(split(InitiatingUserPrincipalName, "@")[1])
  | project-reorder TimeGenerated, AddedUser, RoleName, InitiatedBy

YAML

kind: Scheduled
OriginalUri: https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/Business Email Compromise - Financial Fraud/Analytic Rules/UserAddedtoAdminRole.yaml
query: |
  AuditLogs
    | where OperationName in ("Add eligible member (permanent)", "Add eligible member (eligible)", "Add member to role")
    | mv-apply TargetResource = TargetResources on 
    (
        where TargetResource.type =~ "User"
        | extend Target = tostring(TargetResource.userPrincipalName),
                 props = TargetResource.modifiedProperties
    )
    | mv-apply Property = props on 
    (
        where Property.displayName =~ "Role.DisplayName"
        | extend RoleName = trim('"',tostring(Property.newValue))
    )
    | where RoleName contains "admin"
    | extend InitiatingAppName = tostring(InitiatedBy.app.displayName)
    | extend InitiatingAppServicePrincipalId = tostring(InitiatedBy.app.servicePrincipalId)
    | extend InitiatingUserPrincipalName = tostring(InitiatedBy.user.userPrincipalName)
    | extend InitiatingAadUserId = tostring(InitiatedBy.user.id)
    | extend InitiatingIPAddress = tostring(InitiatedBy.user.ipAddress)
    | extend InitiatedBy = iif(isnotempty(InitiatingAppName), InitiatingAppName, InitiatingUserPrincipalName)
    | extend TargetUserPrincipalName = iff(OperationName=="Add member to role",tostring(TargetResources[0].userPrincipalName),tostring(TargetResources[2].userPrincipalName))
    | extend TargetAadUserId = iff(OperationName=="Add member to role", tostring(TargetResources[0].id), tostring(TargetResources[2].id))
    | extend AddedUser = TargetUserPrincipalName
    | extend TargetAccountName = tostring(split(TargetUserPrincipalName, "@")[0]), TargetAccountUPNSuffix = tostring(split(TargetUserPrincipalName, "@")[1])
    | extend InitiatingAccountName = tostring(split(InitiatingUserPrincipalName, "@")[0]), InitiatingAccountUPNSuffix = tostring(split(InitiatingUserPrincipalName, "@")[1])
    | project-reorder TimeGenerated, AddedUser, RoleName, InitiatedBy  
requiredDataConnectors:
- dataTypes:
  - AuditLogs
  connectorId: AzureActiveDirectory
tactics:
- PrivilegeEscalation
name: User Added to Admin Role
relevantTechniques:
- T1078.004
severity: Low
entityMappings:
- fieldMappings:
  - identifier: FullName
    columnName: TargetUserPrincipalName
  - identifier: Name
    columnName: TargetAccountName
  - identifier: UPNSuffix
    columnName: TargetAccountUPNSuffix
  entityType: Account
- fieldMappings:
  - identifier: AadUserId
    columnName: TargetAadUserId
  entityType: Account
- fieldMappings:
  - identifier: FullName
    columnName: InitiatingUserPrincipalName
  - identifier: Name
    columnName: InitiatingAccountName
  - identifier: UPNSuffix
    columnName: InitiatingAccountUPNSuffix
  entityType: Account
- fieldMappings:
  - identifier: AadUserId
    columnName: InitiatingAadUserId
  entityType: Account
tags:
- AADSecOpsGuide
queryFrequency: 1d
description: |
  'Detects a user being added to a new privileged role. Monitor these additions to ensure the users are made eligible for these roles are intended to have these levels of access.
    Ref: https://docs.microsoft.com/azure/active-directory/fundamentals/security-operations-privileged-accounts#changes-to-privileged-accounts'  
triggerThreshold: 0
triggerOperator: gt
version: 1.0.4
queryPeriod: 1d
id: 2a09f8cb-deb7-4c40-b08b-9137667f1c0b

ARM