Box - Abmormal user activity

let lbperiod_start = 14d;
let lbperiod_end = 24h;
let user_actions_1 = BoxEvents
| where TimeGenerated between (ago(lbperiod_start) .. ago(lbperiod_end))
| summarize TotalEvents = count() by SourceName
| project TotalEvents, User = SourceName;
let user_actions_2 = BoxEvents
| where TimeGenerated between (ago(lbperiod_start) .. ago(lbperiod_end))
| summarize TotalEvents = count() by SrcUserName
| project TotalEvents, User = SrcUserName;
let TotalActions = (union user_actions_1, user_actions_2)
| summarize TotalEvents = count() by User
| extend EventsPerDay = TotalEvents / 29
| extend k = 1;
let actions1_last_h = BoxEvents
| summarize TotalEventsH = count() by SourceName
| project TotalEventsH, User = SourceName;
let actions2_last_h = BoxEvents
| summarize TotalEventsH = count() by SourceName
| project TotalEventsH, User = SourceName;
let TotalActionsLastHour = (union actions1_last_h, actions2_last_h)
| summarize TotalEventsH = sum(TotalEventsH) by User
| extend k = 1;
TotalActions
| join (TotalActionsLastHour) on k
| where EventsPerDay > TotalEventsH
| project User
| extend AccountCustomEntity = User

relevantTechniques:
- T1530
name: Box - Abmormal user activity
requiredDataConnectors:
- dataTypes:
  - BoxEvents_CL
  connectorId: BoxDataConnector
entityMappings:
- fieldMappings:
  - identifier: FullName
    columnName: AccountCustomEntity
  entityType: Account
triggerThreshold: 0
id: 1139230c-cf10-45db-b616-fed0d1415c05
tactics:
- Collection
version: 1.0.0
OriginalUri: https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/Box/Analytic Rules/BoxAbnormalUserActivity.yaml
queryPeriod: 14d
kind: Scheduled
queryFrequency: 1h
severity: Medium
status: Available
description: |
    'Detects spikes (deviations from avarage) in user activity.'
query: |
  let lbperiod_start = 14d;
  let lbperiod_end = 24h;
  let user_actions_1 = BoxEvents
  | where TimeGenerated between (ago(lbperiod_start) .. ago(lbperiod_end))
  | summarize TotalEvents = count() by SourceName
  | project TotalEvents, User = SourceName;
  let user_actions_2 = BoxEvents
  | where TimeGenerated between (ago(lbperiod_start) .. ago(lbperiod_end))
  | summarize TotalEvents = count() by SrcUserName
  | project TotalEvents, User = SrcUserName;
  let TotalActions = (union user_actions_1, user_actions_2)
  | summarize TotalEvents = count() by User
  | extend EventsPerDay = TotalEvents / 29
  | extend k = 1;
  let actions1_last_h = BoxEvents
  | summarize TotalEventsH = count() by SourceName
  | project TotalEventsH, User = SourceName;
  let actions2_last_h = BoxEvents
  | summarize TotalEventsH = count() by SourceName
  | project TotalEventsH, User = SourceName;
  let TotalActionsLastHour = (union actions1_last_h, actions2_last_h)
  | summarize TotalEventsH = sum(TotalEventsH) by User
  | extend k = 1;
  TotalActions
  | join (TotalActionsLastHour) on k
  | where EventsPerDay > TotalEventsH
  | project User
  | extend AccountCustomEntity = User  
triggerOperator: gt

{
  "$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/1139230c-cf10-45db-b616-fed0d1415c05')]",
      "kind": "Scheduled",
      "name": "[concat(parameters('workspace'),'/Microsoft.SecurityInsights/1139230c-cf10-45db-b616-fed0d1415c05')]",
      "properties": {
        "alertRuleTemplateName": "1139230c-cf10-45db-b616-fed0d1415c05",
        "customDetails": null,
        "description": "'Detects spikes (deviations from avarage) in user activity.'\n",
        "displayName": "Box - Abmormal user activity",
        "enabled": true,
        "entityMappings": [
          {
            "entityType": "Account",
            "fieldMappings": [
              {
                "columnName": "AccountCustomEntity",
                "identifier": "FullName"
              }
            ]
          }
        ],
        "OriginalUri": "https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/Box/Analytic Rules/BoxAbnormalUserActivity.yaml",
        "query": "let lbperiod_start = 14d;\nlet lbperiod_end = 24h;\nlet user_actions_1 = BoxEvents\n| where TimeGenerated between (ago(lbperiod_start) .. ago(lbperiod_end))\n| summarize TotalEvents = count() by SourceName\n| project TotalEvents, User = SourceName;\nlet user_actions_2 = BoxEvents\n| where TimeGenerated between (ago(lbperiod_start) .. ago(lbperiod_end))\n| summarize TotalEvents = count() by SrcUserName\n| project TotalEvents, User = SrcUserName;\nlet TotalActions = (union user_actions_1, user_actions_2)\n| summarize TotalEvents = count() by User\n| extend EventsPerDay = TotalEvents / 29\n| extend k = 1;\nlet actions1_last_h = BoxEvents\n| summarize TotalEventsH = count() by SourceName\n| project TotalEventsH, User = SourceName;\nlet actions2_last_h = BoxEvents\n| summarize TotalEventsH = count() by SourceName\n| project TotalEventsH, User = SourceName;\nlet TotalActionsLastHour = (union actions1_last_h, actions2_last_h)\n| summarize TotalEventsH = sum(TotalEventsH) by User\n| extend k = 1;\nTotalActions\n| join (TotalActionsLastHour) on k\n| where EventsPerDay > TotalEventsH\n| project User\n| extend AccountCustomEntity = User\n",
        "queryFrequency": "PT1H",
        "queryPeriod": "P14D",
        "severity": "Medium",
        "status": "Available",
        "subTechniques": [],
        "suppressionDuration": "PT1H",
        "suppressionEnabled": false,
        "tactics": [
          "Collection"
        ],
        "techniques": [
          "T1530"
        ],
        "templateVersion": "1.0.0",
        "triggerOperator": "GreaterThan",
        "triggerThreshold": 0
      },
      "type": "Microsoft.OperationalInsights/workspaces/providers/alertRules"
    }
  ]
}