Acronis - Multiple Endpoints Accessing Malicious URLs | Microsoft Sentinel Analytic Rules

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Id	1385f0ce-69d9-4abf-8039-52080c8c7017
Rulename	Acronis - Multiple Endpoints Accessing Malicious URLs
Description	Multiple endpoints accessing malicious URLs could indicate an ongoing phishing attack, with several employees interacting with those URLs.
Severity	Medium
Tactics	Execution
Techniques	T1204.001
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/AcronisMultipleEndpointsAccessingMaliciousURLs.yaml
Version	1.0.0
Arm template	1385f0ce-69d9-4abf-8039-52080c8c7017.json

KQL

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

YAML

eventGroupingSettings:
  aggregationKind: SingleAlert
id: 1385f0ce-69d9-4abf-8039-52080c8c7017
customDetails:
  DeviceName: DeviceName
version: 1.0.0
incidentConfiguration:
  createIncident: true
  groupingConfiguration:
    lookbackDuration: P1D
    enabled: true
    reopenClosedIncident: true
    matchingMethod: AnyAlert
OriginalUri: https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/Acronis%20Cyber%20Protect%20Cloud/Analytic%20Rules/AcronisMultipleEndpointsAccessingMaliciousURLs.yaml
tactics:
- Execution
description: Multiple endpoints accessing malicious URLs could indicate an ongoing phishing attack, with several employees interacting with those URLs.
entityMappings:
- fieldMappings:
  - identifier: HostName
    columnName: DeviceName
  entityType: Host
relevantTechniques:
- T1204.001
queryFrequency: 1h
triggerThreshold: 2
kind: Scheduled
name: Acronis - Multiple Endpoints Accessing Malicious URLs
query: |
  CommonSecurityLog
  | where DeviceVendor == "Acronis"
  | where DeviceEventClassID == "MaliciousUrlDetected"
  | summarize MaliciousUrlDetected = count() by DeviceName
requiredDataConnectors: []
triggerOperator: gt
queryPeriod: 1d
severity: Medium

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/1385f0ce-69d9-4abf-8039-52080c8c7017')]",
      "kind": "Scheduled",
      "name": "[concat(parameters('workspace'),'/Microsoft.SecurityInsights/1385f0ce-69d9-4abf-8039-52080c8c7017')]",
      "properties": {
        "alertRuleTemplateName": "1385f0ce-69d9-4abf-8039-52080c8c7017",
        "customDetails": {
          "DeviceName": "DeviceName"
        },
        "description": "Multiple endpoints accessing malicious URLs could indicate an ongoing phishing attack, with several employees interacting with those URLs.",
        "displayName": "Acronis - Multiple Endpoints Accessing Malicious URLs",
        "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/AcronisMultipleEndpointsAccessingMaliciousURLs.yaml",
        "query": "CommonSecurityLog\n| where DeviceVendor == \"Acronis\"\n| where DeviceEventClassID == \"MaliciousUrlDetected\"\n| summarize MaliciousUrlDetected = count() by DeviceName\n",
        "queryFrequency": "PT1H",
        "queryPeriod": "P1D",
        "severity": "Medium",
        "subTechniques": [
          "T1204.001"
        ],
        "suppressionDuration": "PT1H",
        "suppressionEnabled": false,
        "tactics": [
          "Execution"
        ],
        "techniques": [
          "T1204"
        ],
        "templateVersion": "1.0.0",
        "triggerOperator": "GreaterThan",
        "triggerThreshold": 2
      },
      "type": "Microsoft.OperationalInsights/workspaces/providers/alertRules"
    }
  ]
}