Pathlock TDnR - User Authorization Buffer Manipulation

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Id	2a3b4c5d-6e7f-4a0b-8c1d-2e3f4a5b6c72
Rulename	Pathlock TDnR - User Authorization Buffer Manipulation
Description	Detects unauthorized manipulations of the SAP user authorization buffer (USRBF2), forwarded by Pathlock Threat Detection and Response. Direct manipulation of the authorization buffer bypasses the normal role/profile assignment process and can grant arbitrary privileges to any user without leaving a trace in standard authorization management logs.
Severity	High
Tactics	PrivilegeEscalation DefenseEvasion
Techniques	T1548 T1562
Required data connectors	Pathlock_TDnR
Kind	Scheduled
Query frequency	1h
Query period	1h
Trigger threshold	0
Trigger operator	gt
Source Uri	https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/Pathlock_TDnR/Analytic%20Rules/Pathlock_TDnR_USER_AUTH_BUFFER.yaml
Version	1.0.0
Arm template	2a3b4c5d-6e7f-4a0b-8c1d-2e3f4a5b6c72.json

KQL

Pathlock_TDnR_CL
| where DataSource == "USER_AUTH_BUFFER"
| project TimeGenerated, Sysid, DataSource, Eventid, Instance, Hostname, Bname,
          Tcode, Report, Area, Subid, SrcIp, DestIp, AffectedUser, LogLine,
          MsgType, MsgId, MsgNo, MessageV1, MessageV2, MessageV3, MessageV4, CentralTs

YAML

entityMappings:
- entityType: Account
  fieldMappings:
  - columnName: Bname
    identifier: Name
- entityType: Host
  fieldMappings:
  - columnName: Hostname
    identifier: HostName
- entityType: IP
  fieldMappings:
  - columnName: SrcIp
    identifier: Address
tactics:
- PrivilegeEscalation
- DefenseEvasion
status: Available
queryPeriod: 1h
queryFrequency: 1h
incidentConfiguration:
  createIncident: true
  groupingConfiguration:
    enabled: true
    groupByAlertDetails: []
    matchingMethod: AnyAlert
    reopenClosedIncident: false
    groupByCustomDetails: []
    lookbackDuration: 5h
    groupByEntities: []
requiredDataConnectors:
- connectorId: Pathlock_TDnR
  dataTypes:
  - Pathlock_TDnR_CL
severity: High
relevantTechniques:
- T1548
- T1562
name: Pathlock TDnR - User Authorization Buffer Manipulation
kind: Scheduled
OriginalUri: https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/Pathlock_TDnR/Analytic%20Rules/Pathlock_TDnR_USER_AUTH_BUFFER.yaml
eventGroupingSettings:
  aggregationKind: SingleAlert
description: Detects unauthorized manipulations of the SAP user authorization buffer (USRBF2), forwarded by Pathlock Threat Detection and Response. Direct manipulation of the authorization buffer bypasses the normal role/profile assignment process and can grant arbitrary privileges to any user without leaving a trace in standard authorization management logs.
triggerOperator: gt
suppressionDuration: 5h
id: 2a3b4c5d-6e7f-4a0b-8c1d-2e3f4a5b6c72
version: 1.0.0
triggerThreshold: 0
suppressionEnabled: false
query: |
  Pathlock_TDnR_CL
  | where DataSource == "USER_AUTH_BUFFER"
  | project TimeGenerated, Sysid, DataSource, Eventid, Instance, Hostname, Bname,
            Tcode, Report, Area, Subid, SrcIp, DestIp, AffectedUser, LogLine,
            MsgType, MsgId, MsgNo, MessageV1, MessageV2, MessageV3, MessageV4, CentralTs

ARM

{
  "$schema": "https://schema.management.azure.com/schemas/2019-04-01/deploymentTemplate.json#",
  "contentVersion": "1.0.0.0",
  "parameters": {
    "workspace": {
      "type": "String"
    }
  },
  "resources": [
    {
      "apiVersion": "2024-01-01-preview",
      "id": "[concat(resourceId('Microsoft.OperationalInsights/workspaces/providers', parameters('workspace'), 'Microsoft.SecurityInsights'),'/alertRules/2a3b4c5d-6e7f-4a0b-8c1d-2e3f4a5b6c72')]",
      "kind": "Scheduled",
      "name": "[concat(parameters('workspace'),'/Microsoft.SecurityInsights/2a3b4c5d-6e7f-4a0b-8c1d-2e3f4a5b6c72')]",
      "properties": {
        "alertRuleTemplateName": "2a3b4c5d-6e7f-4a0b-8c1d-2e3f4a5b6c72",
        "customDetails": null,
        "description": "Detects unauthorized manipulations of the SAP user authorization buffer (USRBF2), forwarded by Pathlock Threat Detection and Response. Direct manipulation of the authorization buffer bypasses the normal role/profile assignment process and can grant arbitrary privileges to any user without leaving a trace in standard authorization management logs.",
        "displayName": "Pathlock TDnR - User Authorization Buffer Manipulation",
        "enabled": true,
        "entityMappings": [
          {
            "entityType": "Account",
            "fieldMappings": [
              {
                "columnName": "Bname",
                "identifier": "Name"
              }
            ]
          },
          {
            "entityType": "Host",
            "fieldMappings": [
              {
                "columnName": "Hostname",
                "identifier": "HostName"
              }
            ]
          },
          {
            "entityType": "IP",
            "fieldMappings": [
              {
                "columnName": "SrcIp",
                "identifier": "Address"
              }
            ]
          }
        ],
        "eventGroupingSettings": {
          "aggregationKind": "SingleAlert"
        },
        "incidentConfiguration": {
          "createIncident": true,
          "groupingConfiguration": {
            "enabled": true,
            "groupByAlertDetails": [],
            "groupByCustomDetails": [],
            "groupByEntities": [],
            "lookbackDuration": "PT5H",
            "matchingMethod": "AnyAlert",
            "reopenClosedIncident": false
          }
        },
        "OriginalUri": "https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/Pathlock_TDnR/Analytic%20Rules/Pathlock_TDnR_USER_AUTH_BUFFER.yaml",
        "query": "Pathlock_TDnR_CL\n| where DataSource == \"USER_AUTH_BUFFER\"\n| project TimeGenerated, Sysid, DataSource, Eventid, Instance, Hostname, Bname,\n          Tcode, Report, Area, Subid, SrcIp, DestIp, AffectedUser, LogLine,\n          MsgType, MsgId, MsgNo, MessageV1, MessageV2, MessageV3, MessageV4, CentralTs\n",
        "queryFrequency": "PT1H",
        "queryPeriod": "PT1H",
        "severity": "High",
        "status": "Available",
        "subTechniques": [],
        "suppressionDuration": "PT5H",
        "suppressionEnabled": false,
        "tactics": [
          "DefenseEvasion",
          "PrivilegeEscalation"
        ],
        "techniques": [
          "T1548",
          "T1562"
        ],
        "templateVersion": "1.0.0",
        "triggerOperator": "GreaterThan",
        "triggerThreshold": 0
      },
      "type": "Microsoft.OperationalInsights/workspaces/providers/alertRules"
    }
  ]
}