detection.wiki

Detection rules › Kusto

Cyble Vision Alerts Website Defacement URL

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

'Detects suspicious or unexpected changes to monitored URLs which may indicate website tampering or defacement.'

MITRE ATT&CK coverage

TacticTechniques
ImpactT1491 Defacement

Rule body kusto

id: 1dabe566-a0f1-4c27-8307-aea5a79eb5e9
name: Cyble Vision Alerts Website Defacement URL
description: |
  'Detects suspicious or unexpected changes to monitored URLs which may indicate website tampering or defacement.'
severity: Low
status: Available
requiredDataConnectors:
- connectorId: CybleVisionAlerts
  dataTypes:
  - CybleVisionAlerts_CL
enabled: true
queryfrequency: 30m
queryPeriod: 30m
triggerOperator: GreaterThan
triggerThreshold: 0
eventGroupingSettings:
  aggregationKind: AlertPerResult
tactics:
- Impact
relevantTechniques:
- T1491
query: |
  Alerts_defacement_url  
  | where Service == "defacement_url" 
  | extend MappedSeverity = Severity
incidentConfiguration:
  createIncident: true
  groupingConfiguration:
    enabled: false
    reopenClosedIncident: false
    lookbackDuration: PT5H
    matchingMethod: AllEntities
  alertDetailsOverride:
  alertDisplayNameFormat: URL Content Change Detected {{DU_DomainName}}
  alertDescriptionFormat: |
    A monitored URL for domain {{DU_DomainName}} has changed {{DU_Description}}. This may indicate unauthorized modification consistent with website defacement activity.
customDetails:
  MappedSeverity: Severity
  Status: Status
  AlertID: AlertID
  Service: Service
  DU_description: DU_Description
  DU_DomainName: DU_DomainName
  DU_Keywords: DU_Keywords
  DU_Type: DU_Type
  DU_RecordID: DU_RecordID
entityMappings:
- entityType: Url
  fieldMappings:
  - identifier: Url
    columnName: DU_Description
- entityType: Host
  fieldMappings:
  - identifier: HostName
    columnName: DU_DomainName
version: 1.0.0
kind: Scheduled

Stages and Predicates

Stage 1: source

Alerts_defacement_url

Stage 2: where

| where Service == "defacement_url"

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
  • defacement_url 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