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

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

ARM