↳ GitHub sourceAnalytics ruleHigh

CYFIRMA - Brand Intelligence - Domain Impersonation High 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."

Rule type: Scheduled
Version: 1.0.1
Declared status: Available
Query frequency: 5m
Query period: 5m
Trigger: gt 0

Declared MITRE coverage

Declared sources

Metadata from the source file. No dependencies inferred from KQL.

Connectors

CyfirmaBrandIntelligenceAlertsDC

Data types

CyfirmaBIDomainITAssetAlerts_CL

KQL query

Original query, unchanged.

// High severity-  Brand Intelligence - Domain Impersonation
let timeFrame = 5m;
CyfirmaBIDomainITAssetAlerts_CL
| where severity == 'Critical' 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

Declared entities

DNS

Source provenance

GitHub

Displayed values come from files in Azure/Azure-Sentinel. They describe the published template, not your workspace configuration.

File: Solutions/Cyfirma Brand Intelligence/Analytic Rules/BIDomainImpersonationHighRule.yaml ↗
Commit: 9800e51 ↗
Source identifier: 10bdf525-5b89-4a25-933a-e63e73b915f1

Additional source files 2

Solutions/Cyfirma Brand Intelligence/Analytic Rules/BIDomainImpersonationHighRule.yamlsource ↗Solutions/Cyfirma Brand Intelligence/Data/Solution_CyfirmaBrandIntelligence.jsonsolution-membership ↗

GSTEP / CATALOG TRACKING

Added to catalog : 16 Sept 2026 · 05:49 UTC
Last change observed : 16 Sept 2026 · 05:49 UTC

GSTEP sync dates, separate from the source content’s publication dates.