Semperis DSP RBAC Changes

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Id	e5edf3f3-de53-45e6-b0d7-1ce1c048df4a
Rulename	Semperis DSP RBAC Changes
Description	Alerts when there are RBAC changes in the DSP system.
Severity	Medium
Required data connectors	SemperisDSP
Kind	Scheduled
Query frequency	30m
Query period	30m
Trigger threshold	0
Trigger operator	gt
Source Uri	https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/Semperis Directory Services Protector/Analytic Rules/Semperis_DSP_RBAC_Changes.yaml
Arm template	e5edf3f3-de53-45e6-b0d7-1ce1c048df4a.json

KQL

Event 
| where Source == 'Semperis-Operation-Log' and EventID == 20012 
| order by TimeGenerated desc
| extend p1Xml = parse_xml(EventData).DataItem.EventData.Data
| mv-expand bagexpansion=array p1Xml
| evaluate bag_unpack(p1Xml)
| extend Name=column_ifexists('@Name', ''), Value=column_ifexists('#text', '')
| evaluate pivot(Name, any(Value), TimeGenerated, Source, EventLog, Computer, EventLevel, EventLevelName, EventID, EventCategory, UserName, Type, _ResourceId)
| extend det = column_ifexists('details', '')
| parse det with "Occured at (UTC): " OccurredAt "Session ID: " SessionID "Trustee Name: " TrusteeName "Correlation ID: " CorrelationID "Source: " Source "WebSite Target: " WebSiteTarget "Product: " Product "Component: " Component "AD Information: " ADInformation "Object GUID: " ObjectGUID "Attribute: " Attribute "Distinguished Name: " DistinguishedName "Additional Information: "AdditionalInformation "Operation Detail: " OperationDetail "operationName: " operationName "trustee: " trustee "personas: " personas "Status: " status "Granted: " Granted "Result: " Result
| extend _AccessGranted = iif(operationName contains "CreateRbacIdentity", "Added", "Removed")
| extend _Identity = iif(operationName contains "CreateRbacIdentity", trustee, tostring(substring(trustee, 1, strlen(trustee))))
| extend _Identity = iif(operationName contains "CreateRbacIdentity", _Identity, replace_string(_Identity, "'", ""))
| extend add_personas = replace_string(replace_string(replace_string(personas, "{ Name = ", ""), " }", ""), ";", ",")
| extend remove_personas = replace_string(personas, ";", ",")
| extend grid_personas = iif(operationName contains "CreateRbacIdentity", add_personas, remove_personas)
| extend date_to_sort = format_datetime(TimeGenerated, "yyyy-mm-dd   HH:mm:ss")
| order by date_to_sort desc
| count

YAML

triggerThreshold: 0
queryFrequency: 30m
id: e5edf3f3-de53-45e6-b0d7-1ce1c048df4a
alertDetailsOverride:
  alertDescriptionFormat: A RBAC change was detected in the DSP system.
  alertDisplayNameFormat: RBAC Change -- Alert from Semperis Directory Services Protector
kind: Scheduled
triggerOperator: gt
severity: Medium
eventGroupingSettings:
  aggregationKind: SingleAlert
requiredDataConnectors:
- connectorId: SemperisDSP
  dataTypes:
  - dsp_parser
query: |
  Event 
  | where Source == 'Semperis-Operation-Log' and EventID == 20012 
  | order by TimeGenerated desc
  | extend p1Xml = parse_xml(EventData).DataItem.EventData.Data
  | mv-expand bagexpansion=array p1Xml
  | evaluate bag_unpack(p1Xml)
  | extend Name=column_ifexists('@Name', ''), Value=column_ifexists('#text', '')
  | evaluate pivot(Name, any(Value), TimeGenerated, Source, EventLog, Computer, EventLevel, EventLevelName, EventID, EventCategory, UserName, Type, _ResourceId)
  | extend det = column_ifexists('details', '')
  | parse det with "Occured at (UTC): " OccurredAt "Session ID: " SessionID "Trustee Name: " TrusteeName "Correlation ID: " CorrelationID "Source: " Source "WebSite Target: " WebSiteTarget "Product: " Product "Component: " Component "AD Information: " ADInformation "Object GUID: " ObjectGUID "Attribute: " Attribute "Distinguished Name: " DistinguishedName "Additional Information: "AdditionalInformation "Operation Detail: " OperationDetail "operationName: " operationName "trustee: " trustee "personas: " personas "Status: " status "Granted: " Granted "Result: " Result
  | extend _AccessGranted = iif(operationName contains "CreateRbacIdentity", "Added", "Removed")
  | extend _Identity = iif(operationName contains "CreateRbacIdentity", trustee, tostring(substring(trustee, 1, strlen(trustee))))
  | extend _Identity = iif(operationName contains "CreateRbacIdentity", _Identity, replace_string(_Identity, "'", ""))
  | extend add_personas = replace_string(replace_string(replace_string(personas, "{ Name = ", ""), " }", ""), ";", ",")
  | extend remove_personas = replace_string(personas, ";", ",")
  | extend grid_personas = iif(operationName contains "CreateRbacIdentity", add_personas, remove_personas)
  | extend date_to_sort = format_datetime(TimeGenerated, "yyyy-mm-dd   HH:mm:ss")
  | order by date_to_sort desc
  | count  
queryPeriod: 30m
name: Semperis DSP RBAC Changes
OriginalUri: https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/Semperis Directory Services Protector/Analytic Rules/Semperis_DSP_RBAC_Changes.yaml
status: Available
description: |
    'Alerts when there are RBAC changes in the DSP system.'

ARM

{
  "$schema": "https://schema.management.azure.com/schemas/2019-04-01/deploymentTemplate.json#",
  "contentVersion": "1.0.0.0",
  "parameters": {
    "workspace": {
      "type": "String"
    }
  },
  "resources": [
    {
      "id": "[concat(resourceId('Microsoft.OperationalInsights/workspaces/providers', parameters('workspace'), 'Microsoft.SecurityInsights'),'/alertRules/e5edf3f3-de53-45e6-b0d7-1ce1c048df4a')]",
      "name": "[concat(parameters('workspace'),'/Microsoft.SecurityInsights/e5edf3f3-de53-45e6-b0d7-1ce1c048df4a')]",
      "type": "Microsoft.OperationalInsights/workspaces/providers/alertRules",
      "kind": "Scheduled",
      "apiVersion": "2022-11-01",
      "properties": {
        "displayName": "Semperis DSP RBAC Changes",
        "description": "'Alerts when there are RBAC changes in the DSP system.'\n",
        "severity": "Medium",
        "enabled": true,
        "query": "Event \n| where Source == 'Semperis-Operation-Log' and EventID == 20012 \n| order by TimeGenerated desc\n| extend p1Xml = parse_xml(EventData).DataItem.EventData.Data\n| mv-expand bagexpansion=array p1Xml\n| evaluate bag_unpack(p1Xml)\n| extend Name=column_ifexists('@Name', ''), Value=column_ifexists('#text', '')\n| evaluate pivot(Name, any(Value), TimeGenerated, Source, EventLog, Computer, EventLevel, EventLevelName, EventID, EventCategory, UserName, Type, _ResourceId)\n| extend det = column_ifexists('details', '')\n| parse det with \"Occured at (UTC): \" OccurredAt \"Session ID: \" SessionID \"Trustee Name: \" TrusteeName \"Correlation ID: \" CorrelationID \"Source: \" Source \"WebSite Target: \" WebSiteTarget \"Product: \" Product \"Component: \" Component \"AD Information: \" ADInformation \"Object GUID: \" ObjectGUID \"Attribute: \" Attribute \"Distinguished Name: \" DistinguishedName \"Additional Information: \"AdditionalInformation \"Operation Detail: \" OperationDetail \"operationName: \" operationName \"trustee: \" trustee \"personas: \" personas \"Status: \" status \"Granted: \" Granted \"Result: \" Result\n| extend _AccessGranted = iif(operationName contains \"CreateRbacIdentity\", \"Added\", \"Removed\")\n| extend _Identity = iif(operationName contains \"CreateRbacIdentity\", trustee, tostring(substring(trustee, 1, strlen(trustee))))\n| extend _Identity = iif(operationName contains \"CreateRbacIdentity\", _Identity, replace_string(_Identity, \"'\", \"\"))\n| extend add_personas = replace_string(replace_string(replace_string(personas, \"{ Name = \", \"\"), \" }\", \"\"), \";\", \",\")\n| extend remove_personas = replace_string(personas, \";\", \",\")\n| extend grid_personas = iif(operationName contains \"CreateRbacIdentity\", add_personas, remove_personas)\n| extend date_to_sort = format_datetime(TimeGenerated, \"yyyy-mm-dd   HH:mm:ss\")\n| order by date_to_sort desc\n| count\n",
        "queryFrequency": "PT30M",
        "queryPeriod": "PT30M",
        "triggerOperator": "GreaterThan",
        "triggerThreshold": 0,
        "suppressionDuration": "PT1H",
        "suppressionEnabled": false,
        "alertRuleTemplateName": "e5edf3f3-de53-45e6-b0d7-1ce1c048df4a",
        "eventGroupingSettings": {
          "aggregationKind": "SingleAlert"
        },
        "alertDetailsOverride": {
          "alertDescriptionFormat": "A RBAC change was detected in the DSP system.",
          "alertDisplayNameFormat": "RBAC Change -- Alert from Semperis Directory Services Protector"
        },
        "customDetails": null,
        "entityMappings": null,
        "OriginalUri": "https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/Semperis Directory Services Protector/Analytic Rules/Semperis_DSP_RBAC_Changes.yaml",
        "status": "Available"
      }
    }
  ]
}