1Password - Potential insider privilege escalation via group

OnePasswordEventLogs_CL
| where log_source == "auditevents"
| where action has_any("join", "role")
| where object_type == "gm"
| where tostring(actor_details.email) == tostring(aux_details.email)
| extend
    TargetUsername = aux_details.email
    , ActorUsername = actor_details.email
    , SrcIpAddr = session.ip
    , GroupRole = case(
        aux_info == "R", "Group member"
        , aux_info == "A", "Group manager"
        , aux_info
    )

version: 1.0.0
queryPeriod: 5m
id: 398a1cf1-f56f-4700-912c-9bf4c8409ebc
OriginalUri: https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/1Password/Analytics Rules/1Password - Potential insider privilege escalation via group.yaml
suppressionEnabled: false
triggerThreshold: 0
kind: Scheduled
severity: Medium
description: |-
  This will alert when an actor grants, or updates their own permissions via a group. Once this analytics rule is triggered it will group all related future alerts for upto an hour when all related entities are the same.

  Ref: https://1password.com/
  Ref: https://github.com/securehats/  
triggerOperator: gt
tactics:
- PrivilegeEscalation
queryFrequency: 5m
suppressionDuration: 5h
query: |-
  OnePasswordEventLogs_CL
  | where log_source == "auditevents"
  | where action has_any("join", "role")
  | where object_type == "gm"
  | where tostring(actor_details.email) == tostring(aux_details.email)
  | extend
      TargetUsername = aux_details.email
      , ActorUsername = actor_details.email
      , SrcIpAddr = session.ip
      , GroupRole = case(
          aux_info == "R", "Group member"
          , aux_info == "A", "Group manager"
          , aux_info
      )  
requiredDataConnectors:
- connectorId: 1Password
  dataTypes:
  - OnePasswordEventLogs_CL
incidentConfiguration:
  createIncident: true
  groupingConfiguration:
    enabled: true
    reopenClosedIncident: false
    matchingMethod: AllEntities
    lookbackDuration: 1h
relevantTechniques:
- T1078
eventGroupingSettings:
  aggregationKind: SingleAlert
name: 1Password - Potential insider privilege escalation via group
subTechniques:
- T1078.004
entityMappings:
- entityType: Account
  fieldMappings:
  - identifier: FullName
    columnName: ActorUsername
- entityType: Account
  fieldMappings:
  - identifier: FullName
    columnName: TargetUsername
- entityType: IP
  fieldMappings:
  - identifier: Address
    columnName: SrcIpAddr

{
  "$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/398a1cf1-f56f-4700-912c-9bf4c8409ebc')]",
      "kind": "Scheduled",
      "name": "[concat(parameters('workspace'),'/Microsoft.SecurityInsights/398a1cf1-f56f-4700-912c-9bf4c8409ebc')]",
      "properties": {
        "alertRuleTemplateName": "398a1cf1-f56f-4700-912c-9bf4c8409ebc",
        "customDetails": null,
        "description": "This will alert when an actor grants, or updates their own permissions via a group. Once this analytics rule is triggered it will group all related future alerts for upto an hour when all related entities are the same.\n\nRef: https://1password.com/\nRef: https://github.com/securehats/",
        "displayName": "1Password - Potential insider privilege escalation via group",
        "enabled": true,
        "entityMappings": [
          {
            "entityType": "Account",
            "fieldMappings": [
              {
                "columnName": "ActorUsername",
                "identifier": "FullName"
              }
            ]
          },
          {
            "entityType": "Account",
            "fieldMappings": [
              {
                "columnName": "TargetUsername",
                "identifier": "FullName"
              }
            ]
          },
          {
            "entityType": "IP",
            "fieldMappings": [
              {
                "columnName": "SrcIpAddr",
                "identifier": "Address"
              }
            ]
          }
        ],
        "eventGroupingSettings": {
          "aggregationKind": "SingleAlert"
        },
        "incidentConfiguration": {
          "createIncident": true,
          "groupingConfiguration": {
            "enabled": true,
            "lookbackDuration": "PT1H",
            "matchingMethod": "AllEntities",
            "reopenClosedIncident": false
          }
        },
        "OriginalUri": "https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/1Password/Analytics Rules/1Password - Potential insider privilege escalation via group.yaml",
        "query": "OnePasswordEventLogs_CL\n| where log_source == \"auditevents\"\n| where action has_any(\"join\", \"role\")\n| where object_type == \"gm\"\n| where tostring(actor_details.email) == tostring(aux_details.email)\n| extend\n    TargetUsername = aux_details.email\n    , ActorUsername = actor_details.email\n    , SrcIpAddr = session.ip\n    , GroupRole = case(\n        aux_info == \"R\", \"Group member\"\n        , aux_info == \"A\", \"Group manager\"\n        , aux_info\n    )",
        "queryFrequency": "PT5M",
        "queryPeriod": "PT5M",
        "severity": "Medium",
        "subTechniques": [],
        "suppressionDuration": "PT5H",
        "suppressionEnabled": false,
        "tactics": [
          "PrivilegeEscalation"
        ],
        "techniques": [
          "T1078"
        ],
        "templateVersion": "1.0.0",
        "triggerOperator": "GreaterThan",
        "triggerThreshold": 0
      },
      "type": "Microsoft.OperationalInsights/workspaces/providers/alertRules"
    }
  ]
}