Vaikora - Engine offline

let recentTenants = toscalar(
  VaikoraO365_Quarantine_CL
  | where TimeGenerated >= ago(2h)
  | summarize make_set(TenantId_s)
);
VaikoraO365_Quarantine_CL
| where TimeGenerated between (ago(1d) .. ago(2h))
| summarize LastSeen = max(TimeGenerated) by TenantId_s
| where TenantId_s !in (recentTenants)
| project TimeGenerated = now(), TenantId = TenantId_s, LastSeen, HoursOffline = (now() - LastSeen) / 1h

name: Vaikora - Engine offline
triggerOperator: gt
query: |
  let recentTenants = toscalar(
    VaikoraO365_Quarantine_CL
    | where TimeGenerated >= ago(2h)
    | summarize make_set(TenantId_s)
  );
  VaikoraO365_Quarantine_CL
  | where TimeGenerated between (ago(1d) .. ago(2h))
  | summarize LastSeen = max(TimeGenerated) by TenantId_s
  | where TenantId_s !in (recentTenants)
  | project TimeGenerated = now(), TenantId = TenantId_s, LastSeen, HoursOffline = (now() - LastSeen) / 1h
queryFrequency: 30m
description: |
  Identifies a Vaikora for O365 engine outage by absent quarantine telemetry. Fires when a tenant active in the last 24 hours has sent no rows in the last two hours, indicating the customer VM is unhealthy or the Graph subscription has lapsed.
id: 968b70c1-b468-418a-ac02-1eb74783a52a
triggerThreshold: 0
queryPeriod: 1d
version: 1.0.0
kind: Scheduled
status: Available
severity: Medium
requiredDataConnectors:
- connectorId: VaikoraO365
  dataTypes:
  - VaikoraO365_Quarantine_CL
OriginalUri: https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/Vaikora-O365/Analytic%20Rules/Vaikora%20-%20Engine%20offline.yaml
alertDetailsOverride:
  alertDescriptionFormat: 'No Vaikora-O365 quarantine telemetry has arrived from this tenant in the last 2 hours. Last seen: {{LastSeen}}.'
  alertDisplayNameFormat: Vaikora-O365 engine offline for tenant {{TenantId}}
relevantTechniques:
- T1562
tactics:
- DefenseEvasion
entityMappings:
- fieldMappings:
  - identifier: Name
    columnName: TenantId
  entityType: CloudApplication

{
  "$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/968b70c1-b468-418a-ac02-1eb74783a52a')]",
      "kind": "Scheduled",
      "name": "[concat(parameters('workspace'),'/Microsoft.SecurityInsights/968b70c1-b468-418a-ac02-1eb74783a52a')]",
      "properties": {
        "alertDetailsOverride": {
          "alertDescriptionFormat": "No Vaikora-O365 quarantine telemetry has arrived from this tenant in the last 2 hours. Last seen: {{LastSeen}}.",
          "alertDisplayNameFormat": "Vaikora-O365 engine offline for tenant {{TenantId}}"
        },
        "alertRuleTemplateName": "968b70c1-b468-418a-ac02-1eb74783a52a",
        "customDetails": null,
        "description": "Identifies a Vaikora for O365 engine outage by absent quarantine telemetry. Fires when a tenant active in the last 24 hours has sent no rows in the last two hours, indicating the customer VM is unhealthy or the Graph subscription has lapsed.\n",
        "displayName": "Vaikora - Engine offline",
        "enabled": true,
        "entityMappings": [
          {
            "entityType": "CloudApplication",
            "fieldMappings": [
              {
                "columnName": "TenantId",
                "identifier": "Name"
              }
            ]
          }
        ],
        "OriginalUri": "https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/Vaikora-O365/Analytic%20Rules/Vaikora%20-%20Engine%20offline.yaml",
        "query": "let recentTenants = toscalar(\n  VaikoraO365_Quarantine_CL\n  | where TimeGenerated >= ago(2h)\n  | summarize make_set(TenantId_s)\n);\nVaikoraO365_Quarantine_CL\n| where TimeGenerated between (ago(1d) .. ago(2h))\n| summarize LastSeen = max(TimeGenerated) by TenantId_s\n| where TenantId_s !in (recentTenants)\n| project TimeGenerated = now(), TenantId = TenantId_s, LastSeen, HoursOffline = (now() - LastSeen) / 1h\n",
        "queryFrequency": "PT30M",
        "queryPeriod": "P1D",
        "severity": "Medium",
        "status": "Available",
        "subTechniques": [],
        "suppressionDuration": "PT1H",
        "suppressionEnabled": false,
        "tactics": [
          "DefenseEvasion"
        ],
        "techniques": [
          "T1562"
        ],
        "templateVersion": "1.0.0",
        "triggerOperator": "GreaterThan",
        "triggerThreshold": 0
      },
      "type": "Microsoft.OperationalInsights/workspaces/providers/alertRules"
    }
  ]
}