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

queryPeriod: 5m
relevantTechniques:
- T1583.001
- T1586.002
- T1566.002
- T1566.001
- T1071.003
- T1071.001
kind: Scheduled
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  
tactics:
- ResourceDevelopment
- InitialAccess
- CommandAndControl
queryFrequency: 5m
triggerOperator: gt
incidentConfiguration:
  groupingConfiguration:
    enabled: false
    matchingMethod: AllEntities
    lookbackDuration: PT5H
    reopenClosedIncident: false
  createIncident: true
eventGroupingSettings:
  aggregationKind: AlertPerResult
alertDetailsOverride:
  alertDisplayNameFormat: 'CYFIRMA - Medium Severity Alert - Malicious Domain Impersonation of Corporate Brand - Domain Squat: {{DomainSquat}} '
  alertDynamicProperties:
  - alertProperty: ProductName
    value: ProductName
  - alertProperty: ProviderName
    value: ProviderName
  alertDescriptionFormat: '{{Description}} '
id: 8f97ddbe-ab66-4f6c-b675-73b5eeb07259
OriginalUri: https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/Cyfirma Brand Intelligence/Analytic Rules/BIDomainImpersonationMediumRule.yaml
version: 1.0.1
entityMappings:
- entityType: DNS
  fieldMappings:
  - identifier: DomainName
    columnName: Domain
- entityType: DNS
  fieldMappings:
  - identifier: DomainName
    columnName: DomainSquat
triggerThreshold: 0
customDetails:
  LastSeen: LastSeen
  FirstSeen: FirstSeen
  DRSubDomain: DRSubDomain
  RiskScore: RiskScore
  DRDomain: DRDomain
  AlertUID: AlertUID
  HostProvider: HostProvider
  TimeGenerated: TimeGenerated
  CreatedDate: CreatedDate
  Domain: Domain
  DomainSquat: DomainSquat
  ThreatActor: ThreatActor
  RegisteredDate: RegisteredDate
  UID: UID
  Description: Description
status: Available
name: CYFIRMA - Brand Intelligence - Domain Impersonation Medium Rule
severity: Medium
requiredDataConnectors:
- dataTypes:
  - CyfirmaBIDomainITAssetAlerts_CL
  connectorId: CyfirmaBrandIntelligenceAlertsDC
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."

ARM