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

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

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"
    }
  ]
}