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kqlMITfrom Azure/Azure-Sentinel

Service Principal Assigned Privileged Role

'Detects a privileged role being added to a Service Principal. Ensure that any assignment to a Service Principal is valid and appropriate - Service Principals should not be assigned to very highly privileged roles such as Global Admin. Ref: https://docs.microsoft.com/azure/active-directory/fundamentals/security-operations-privileged-accounts#changes-to-privileged-accounts'

Quality
90
FP risk
—
Forks
0
Views
0
ATT&CK techniques
T1078.004
Rule sourceDetections/AuditLogs/ServicePrincipalAssignedPrivilegedRole.yaml
AuditLogs
  | where OperationName has_all ("member to role", "add")
  | where Result =~ "Success"
  | extend type_ = tostring(TargetResources[0].type)
  | where type_ =~ "ServicePrincipal"
  | where isnotempty(TargetResources)
  | 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 = tostring(iff(isnotempty(InitiatingUserPrincipalName),InitiatingUserPrincipalName, InitiatingAppName))
  | extend ServicePrincipalName = tostring(TargetResources[0].displayName)
  | extend ServicePrincipalId = tostring(TargetResources[0].id)
  | mv-expand TargetResources[0].modifiedProperties
  | extend TargetResources_0_modifiedProperties = columnifexists("TargetResources_0_modifiedProperties", '')
  | where isnotempty(TargetResources_0_modifiedProperties)
  | extend displayName = tostring(TargetResources_0_modifiedProperties.displayName), newValue = tostring(parse_json(tostring(TargetResources_0_modifiedProperties.newValue)))
  | where displayName == "Role.DisplayName" and newValue contains "admin"
  | extend InitiatingAccountName = tostring(split(InitiatingUserPrincipalName, "@")[0]), InitiatingAccountUPNSuffix = tostring(split(InitiatingUserPrincipalName, "@")[1])
  | extend TargetRole = newValue
  | project-reorder TimeGenerated, ServicePrincipalName, ServicePrincipalId, InitiatedBy, TargetRole, InitiatingIPAddress