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
status: Available
queryFrequency: 1h
description: |
'Detects spikes (deviations from avarage) in user activity.'
severity: Medium
version: 1.0.0
relevantTechniques:
- T1530
name: Box - Abmormal user activity
triggerThreshold: 0
kind: Scheduled
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
OriginalUri: https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/Box/Analytic Rules/BoxAbnormalUserActivity.yaml
requiredDataConnectors:
- connectorId: BoxDataConnector
dataTypes:
- BoxEvents_CL
tactics:
- Collection
id: 1139230c-cf10-45db-b616-fed0d1415c05
queryPeriod: 14d
entityMappings:
- fieldMappings:
- columnName: AccountCustomEntity
identifier: FullName
entityType: Account
{
"$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"
}
]
}