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Cyble Vision Alerts Malicious Ads Detected

This is a third-party alert feed, not a detection over modeled telemetry. The vendor product raised the finding; this rule forwards it into the SIEM. It is searchable for reference but is excluded from the detection-rule browse and the ATT&CK coverage matrix.

Status
available
Severity
low
Time window
30m
Source
github.com/Azure/Azure-Sentinel

'Generates an incident when Cyble Intelligence detects a malicious advertisement, malvertising activity, or redirect attempting to impersonate a legitimate brand.'

MITRE ATT&CK coverage

TacticTechniques
Initial AccessT1189 Drive-by Compromise, T1566 Phishing
ExecutionT1059 Command and Scripting Interpreter

Rule body kusto

id: cf0a9691-5716-42e0-bfa1-49b35d3a7892
name: Cyble Vision Alerts Malicious Ads Detected
description: |
  'Generates an incident when Cyble Intelligence detects a malicious advertisement, malvertising activity, or redirect attempting to impersonate a legitimate brand.'
severity: Low
status: Available
requiredDataConnectors:
- connectorId: CybleVisionAlerts
  dataTypes:
  - CybleVisionAlerts_CL
enabled: true
queryFrequency: 30m
queryPeriod: 30m
triggerOperator: GreaterThan
triggerThreshold: 0
suppressionDuration: PT5M
eventGroupingSettings:
  aggregationKind: AlertPerResult
tactics:
- InitialAccess
- Execution
relevantTechniques:
- T1189
- T1566
- T1059
query: |
  Alerts_malicious_ads
  | where Service == "malicious_ads"
  | extend MappedSeverity = Severity
incidentConfiguration:
  createIncident: true
  groupingConfiguration:
    enabled: false
    reopenClosedIncident: false
    lookbackDuration: PT5H
    matchingMethod: AllEntities
  alertDetailsOverride:
  alertDisplayNameFormat: Malicious Ad Detected  {{MA_DomainName_Nested}}
  alertDescriptionFormat: |
    Cyble Intelligence detected a malicious advertisement or suspicious redirect.
    Domain {{MA_Domain_URL}}
    Brand/Keyword {{MA_Keyword_Nested}}
    Status Code {{MA_StatusCode}}
customDetails:
  MappedSeverity: Severity
  Status: Status
  AlertID: AlertID
  Service: Service
  Domain: MA_Domain_URL
  Keyword: MA_Keyword_Nested
  IsLive: MA_IsLive
entityMappings:
- entityType: URL
  fieldMappings:
  - identifier: Url
    columnName: MA_Domain_URL
- entityType: DNS
  fieldMappings:
  - identifier: DomainName
    columnName: MA_DomainName_Nested
version: 1.0.0
kind: Scheduled

Stages and Predicates

Stage 1: source

Alerts_malicious_ads

Stage 2: where

| where Service == "malicious_ads"

Stage 3: extend

| extend MappedSeverity = Severity

Indicators

Each row is a field, operator, and value that the rule matches. The corpus column counts how many other rules in the catalog look for the same combination: high numbers point to widely-used, community-vetted indicators. Blank or 1 shows that the indicator is specific to this rule.

FieldKindValues
Serviceeq
  • malicious_ads transforms: cased

Output fields

Fields the rule emits when it matches. Chronicle authors list these in the outcome block; they appear on the detection and $risk_score drives alerting. Sentinel / Defender XDR rules build them up through project / summarize / extend stages. Sentinel maps these into alert fields via entityMappings and customDetails; Defender XDR custom detections surface them as alert fields directly.

FieldSource
MappedSeverityextend