CYFIRMA - Brand Intelligence - Domain Impersonation Medium Rule

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Id	8f97ddbe-ab66-4f6c-b675-73b5eeb07259
Rulename	CYFIRMA - Brand Intelligence - Domain Impersonation Medium Rule
Description	“This analytics rule detects high-risk domain impersonation activity, where newly registered or existing domains closely resemble the legitimate brand name or organizational assets. These suspicious domains may use typosquatting, homoglyphs, or brand keywords to mislead users, steal credentials, or host phishing/malicious content. The domains are identified through CYFIRMA’s external threat intelligence feeds and flagged due to potential misuse in impersonation, fraud, or social engineering attacks targeting employees, customers, or partners. Early detection of these domains enables proactive mitigation measures such as domain takedown, DNS blocking, and awareness campaigns.”
Severity	Medium
Tactics	ResourceDevelopment InitialAccess CommandAndControl
Techniques	T1583.001 T1586.002 T1566.002 T1566.001 T1071.003 T1071.001
Required data connectors	CyfirmaBrandIntelligenceAlertsDC
Kind	Scheduled
Query frequency	5m
Query period	5m
Trigger threshold	0
Trigger operator	gt
Source Uri	https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/Cyfirma Brand Intelligence/Analytic Rules/BIDomainImpersonationMediumRule.yaml
Version	1.0.1
Arm template	8f97ddbe-ab66-4f6c-b675-73b5eeb07259.json

KQL

// Medium severity Brand Intelligence - Domain Impersonation
let timeFrame = 5m;
CyfirmaBIDomainITAssetAlerts_CL
| where severity == 'High' and TimeGenerated between (ago(timeFrame) .. now())
| extend
    Description=description,
    FirstSeen=first_seen,
    LastSeen=last_seen,
    RiskScore=risk_score,
    AlertUID=alert_uid,
    UID=uid,
    Domain=domain,
    DRDomain=dr_domain,
    DRSubDomain=dr_sub_domain,
    DomainSquat=signature,
    HostProvider=host_provider,
    RegisteredDate=registered_date,
    CreatedDate=created_date,
    ThreatActor=suspected_threat_actor,
    ProviderName='CYFIRMA',
    ProductName='DeCYFIR/DeTCT'
| project
    TimeGenerated,
    Description,
    RiskScore,
    FirstSeen,
    LastSeen,
    AlertUID,
    UID,
    Domain,
    DRDomain,
    DRSubDomain,
    DomainSquat,
    HostProvider,
    RegisteredDate,
    CreatedDate,
    ThreatActor,
    ProductName,
    ProviderName

YAML

name: CYFIRMA - Brand Intelligence - Domain Impersonation Medium Rule
eventGroupingSettings:
  aggregationKind: AlertPerResult
alertDetailsOverride:
  alertDynamicProperties:
  - alertProperty: ProductName
    value: ProductName
  - alertProperty: ProviderName
    value: ProviderName
  alertDisplayNameFormat: 'CYFIRMA - Medium Severity Alert - Malicious Domain Impersonation of Corporate Brand - Domain Squat: {{DomainSquat}} '
  alertDescriptionFormat: '{{Description}} '
id: 8f97ddbe-ab66-4f6c-b675-73b5eeb07259
requiredDataConnectors:
- connectorId: CyfirmaBrandIntelligenceAlertsDC
  dataTypes:
  - CyfirmaBIDomainITAssetAlerts_CL
severity: Medium
triggerThreshold: 0
version: 1.0.1
description: |
  "This analytics rule detects high-risk domain impersonation activity, where newly registered or existing domains closely resemble the legitimate brand name or organizational assets. 
  These suspicious domains may use typosquatting, homoglyphs, or brand keywords to mislead users, steal credentials, or host phishing/malicious content. 
  The domains are identified through CYFIRMA's external threat intelligence feeds and flagged due to potential misuse in impersonation, fraud, or social engineering attacks targeting employees, customers, or partners. 
  Early detection of these domains enables proactive mitigation measures such as domain takedown, DNS blocking, and awareness campaigns."  
relevantTechniques:
- T1583.001
- T1586.002
- T1566.002
- T1566.001
- T1071.003
- T1071.001
kind: Scheduled
queryPeriod: 5m
incidentConfiguration:
  createIncident: true
  groupingConfiguration:
    enabled: false
    reopenClosedIncident: false
    matchingMethod: AllEntities
    lookbackDuration: PT5H
tactics:
- ResourceDevelopment
- InitialAccess
- CommandAndControl
customDetails:
  AlertUID: AlertUID
  LastSeen: LastSeen
  CreatedDate: CreatedDate
  DRDomain: DRDomain
  UID: UID
  DRSubDomain: DRSubDomain
  Domain: Domain
  ThreatActor: ThreatActor
  Description: Description
  FirstSeen: FirstSeen
  RegisteredDate: RegisteredDate
  RiskScore: RiskScore
  DomainSquat: DomainSquat
  TimeGenerated: TimeGenerated
  HostProvider: HostProvider
queryFrequency: 5m
entityMappings:
- fieldMappings:
  - identifier: DomainName
    columnName: Domain
  entityType: DNS
- fieldMappings:
  - identifier: DomainName
    columnName: DomainSquat
  entityType: DNS
status: Available
triggerOperator: gt
query: |
  // Medium severity Brand Intelligence - Domain Impersonation
  let timeFrame = 5m;
  CyfirmaBIDomainITAssetAlerts_CL
  | where severity == 'High' and TimeGenerated between (ago(timeFrame) .. now())
  | extend
      Description=description,
      FirstSeen=first_seen,
      LastSeen=last_seen,
      RiskScore=risk_score,
      AlertUID=alert_uid,
      UID=uid,
      Domain=domain,
      DRDomain=dr_domain,
      DRSubDomain=dr_sub_domain,
      DomainSquat=signature,
      HostProvider=host_provider,
      RegisteredDate=registered_date,
      CreatedDate=created_date,
      ThreatActor=suspected_threat_actor,
      ProviderName='CYFIRMA',
      ProductName='DeCYFIR/DeTCT'
  | project
      TimeGenerated,
      Description,
      RiskScore,
      FirstSeen,
      LastSeen,
      AlertUID,
      UID,
      Domain,
      DRDomain,
      DRSubDomain,
      DomainSquat,
      HostProvider,
      RegisteredDate,
      CreatedDate,
      ThreatActor,
      ProductName,
      ProviderName  
OriginalUri: https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/Cyfirma Brand Intelligence/Analytic Rules/BIDomainImpersonationMediumRule.yaml

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/8f97ddbe-ab66-4f6c-b675-73b5eeb07259')]",
      "kind": "Scheduled",
      "name": "[concat(parameters('workspace'),'/Microsoft.SecurityInsights/8f97ddbe-ab66-4f6c-b675-73b5eeb07259')]",
      "properties": {
        "alertDetailsOverride": {
          "alertDescriptionFormat": "{{Description}} ",
          "alertDisplayNameFormat": "CYFIRMA - Medium Severity Alert - Malicious Domain Impersonation of Corporate Brand - Domain Squat: {{DomainSquat}} ",
          "alertDynamicProperties": [
            {
              "alertProperty": "ProductName",
              "value": "ProductName"
            },
            {
              "alertProperty": "ProviderName",
              "value": "ProviderName"
            }
          ]
        },
        "alertRuleTemplateName": "8f97ddbe-ab66-4f6c-b675-73b5eeb07259",
        "customDetails": {
          "AlertUID": "AlertUID",
          "CreatedDate": "CreatedDate",
          "Description": "Description",
          "Domain": "Domain",
          "DomainSquat": "DomainSquat",
          "DRDomain": "DRDomain",
          "DRSubDomain": "DRSubDomain",
          "FirstSeen": "FirstSeen",
          "HostProvider": "HostProvider",
          "LastSeen": "LastSeen",
          "RegisteredDate": "RegisteredDate",
          "RiskScore": "RiskScore",
          "ThreatActor": "ThreatActor",
          "TimeGenerated": "TimeGenerated",
          "UID": "UID"
        },
        "description": "\"This analytics rule detects high-risk domain impersonation activity, where newly registered or existing domains closely resemble the legitimate brand name or organizational assets. \nThese suspicious domains may use typosquatting, homoglyphs, or brand keywords to mislead users, steal credentials, or host phishing/malicious content. \nThe domains are identified through CYFIRMA's external threat intelligence feeds and flagged due to potential misuse in impersonation, fraud, or social engineering attacks targeting employees, customers, or partners. \nEarly detection of these domains enables proactive mitigation measures such as domain takedown, DNS blocking, and awareness campaigns.\"\n",
        "displayName": "CYFIRMA - Brand Intelligence - Domain Impersonation Medium Rule",
        "enabled": true,
        "entityMappings": [
          {
            "entityType": "DNS",
            "fieldMappings": [
              {
                "columnName": "Domain",
                "identifier": "DomainName"
              }
            ]
          },
          {
            "entityType": "DNS",
            "fieldMappings": [
              {
                "columnName": "DomainSquat",
                "identifier": "DomainName"
              }
            ]
          }
        ],
        "eventGroupingSettings": {
          "aggregationKind": "AlertPerResult"
        },
        "incidentConfiguration": {
          "createIncident": true,
          "groupingConfiguration": {
            "enabled": false,
            "lookbackDuration": "PT5H",
            "matchingMethod": "AllEntities",
            "reopenClosedIncident": false
          }
        },
        "OriginalUri": "https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/Cyfirma Brand Intelligence/Analytic Rules/BIDomainImpersonationMediumRule.yaml",
        "query": "// Medium severity Brand Intelligence - Domain Impersonation\nlet timeFrame = 5m;\nCyfirmaBIDomainITAssetAlerts_CL\n| where severity == 'High' and TimeGenerated between (ago(timeFrame) .. now())\n| extend\n    Description=description,\n    FirstSeen=first_seen,\n    LastSeen=last_seen,\n    RiskScore=risk_score,\n    AlertUID=alert_uid,\n    UID=uid,\n    Domain=domain,\n    DRDomain=dr_domain,\n    DRSubDomain=dr_sub_domain,\n    DomainSquat=signature,\n    HostProvider=host_provider,\n    RegisteredDate=registered_date,\n    CreatedDate=created_date,\n    ThreatActor=suspected_threat_actor,\n    ProviderName='CYFIRMA',\n    ProductName='DeCYFIR/DeTCT'\n| project\n    TimeGenerated,\n    Description,\n    RiskScore,\n    FirstSeen,\n    LastSeen,\n    AlertUID,\n    UID,\n    Domain,\n    DRDomain,\n    DRSubDomain,\n    DomainSquat,\n    HostProvider,\n    RegisteredDate,\n    CreatedDate,\n    ThreatActor,\n    ProductName,\n    ProviderName\n",
        "queryFrequency": "PT5M",
        "queryPeriod": "PT5M",
        "severity": "Medium",
        "status": "Available",
        "subTechniques": [
          "T1583.001",
          "T1586.002",
          "T1566.002",
          "T1566.001",
          "T1071.003",
          "T1071.001"
        ],
        "suppressionDuration": "PT1H",
        "suppressionEnabled": false,
        "tactics": [
          "CommandAndControl",
          "InitialAccess",
          "ResourceDevelopment"
        ],
        "techniques": [
          "T1071",
          "T1566",
          "T1583",
          "T1586"
        ],
        "templateVersion": "1.0.1",
        "triggerOperator": "GreaterThan",
        "triggerThreshold": 0
      },
      "type": "Microsoft.OperationalInsights/workspaces/providers/alertRules"
    }
  ]
}