Acronis - Multiple Endpoints Infected by Ransomware | Microsoft Sentinel Analytic Rules

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Id	a783ade7-bf43-416d-b809-8f5b06d87790
Rulename	Acronis - Multiple Endpoints Infected by Ransomware
Description	Detects when three or more distinct endpoints report ransomware detections within a single day.
Severity	High
Tactics	Impact
Techniques	T1486
Kind	Scheduled
Query frequency	1h
Query period	1d
Trigger threshold	2
Trigger operator	gt
Source Uri	https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/Acronis%20Cyber%20Protect%20Cloud/Analytic%20Rules/AcronisMultipleEndpointsInfectedByRansomware.yaml
Version	1.0.0
Arm template	a783ade7-bf43-416d-b809-8f5b06d87790.json

KQL

CommonSecurityLog
| where DeviceVendor == "Acronis"
| where DeviceEventClassID == "ActiveProtectionBlocksSuspiciousActivity"
| summarize ActiveProtectionBlocksSuspiciousActivity = count() by DeviceName

YAML

incidentConfiguration:
  groupingConfiguration:
    lookbackDuration: P1D
    reopenClosedIncident: true
    matchingMethod: AnyAlert
    enabled: true
  createIncident: true
name: Acronis - Multiple Endpoints Infected by Ransomware
triggerOperator: gt
query: |
  CommonSecurityLog
  | where DeviceVendor == "Acronis"
  | where DeviceEventClassID == "ActiveProtectionBlocksSuspiciousActivity"
  | summarize ActiveProtectionBlocksSuspiciousActivity = count() by DeviceName
queryFrequency: 1h
description: Detects when three or more distinct endpoints report ransomware detections within a single day.
id: a783ade7-bf43-416d-b809-8f5b06d87790
triggerThreshold: 2
queryPeriod: 1d
version: 1.0.0
kind: Scheduled
customDetails:
  DeviceName: DeviceName
relevantTechniques:
- T1486
eventGroupingSettings:
  aggregationKind: SingleAlert
severity: High
requiredDataConnectors: []
OriginalUri: https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/Acronis%20Cyber%20Protect%20Cloud/Analytic%20Rules/AcronisMultipleEndpointsInfectedByRansomware.yaml
tactics:
- Impact
entityMappings:
- fieldMappings:
  - identifier: HostName
    columnName: DeviceName
  entityType: Host

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/a783ade7-bf43-416d-b809-8f5b06d87790')]",
      "kind": "Scheduled",
      "name": "[concat(parameters('workspace'),'/Microsoft.SecurityInsights/a783ade7-bf43-416d-b809-8f5b06d87790')]",
      "properties": {
        "alertRuleTemplateName": "a783ade7-bf43-416d-b809-8f5b06d87790",
        "customDetails": {
          "DeviceName": "DeviceName"
        },
        "description": "Detects when three or more distinct endpoints report ransomware detections within a single day.",
        "displayName": "Acronis - Multiple Endpoints Infected by Ransomware",
        "enabled": true,
        "entityMappings": [
          {
            "entityType": "Host",
            "fieldMappings": [
              {
                "columnName": "DeviceName",
                "identifier": "HostName"
              }
            ]
          }
        ],
        "eventGroupingSettings": {
          "aggregationKind": "SingleAlert"
        },
        "incidentConfiguration": {
          "createIncident": true,
          "groupingConfiguration": {
            "enabled": true,
            "lookbackDuration": "P1D",
            "matchingMethod": "AnyAlert",
            "reopenClosedIncident": true
          }
        },
        "OriginalUri": "https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/Acronis%20Cyber%20Protect%20Cloud/Analytic%20Rules/AcronisMultipleEndpointsInfectedByRansomware.yaml",
        "query": "CommonSecurityLog\n| where DeviceVendor == \"Acronis\"\n| where DeviceEventClassID == \"ActiveProtectionBlocksSuspiciousActivity\"\n| summarize ActiveProtectionBlocksSuspiciousActivity = count() by DeviceName\n",
        "queryFrequency": "PT1H",
        "queryPeriod": "P1D",
        "severity": "High",
        "subTechniques": [],
        "suppressionDuration": "PT1H",
        "suppressionEnabled": false,
        "tactics": [
          "Impact"
        ],
        "techniques": [
          "T1486"
        ],
        "templateVersion": "1.0.0",
        "triggerOperator": "GreaterThan",
        "triggerThreshold": 2
      },
      "type": "Microsoft.OperationalInsights/workspaces/providers/alertRules"
    }
  ]
}