CYFIRMA - Social and Public Exposure - Confidential Files Information Exposure Rule

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Id	67e9c4aa-a2fa-4e4e-9272-1a8da41475c6
Rulename	CYFIRMA - Social and Public Exposure - Confidential Files Information Exposure Rule
Description	“This rule detects high-severity alerts from CYFIRMA regarding exposure of confidential files or forms linked to internal or client-related information, publicly accessible on platforms. These exposures could lead to data leakage, compliance violations, or targeted attacks.”
Severity	High
Tactics	InitialAccess Exfiltration Collection Reconnaissance
Techniques	T1189 T1213 T1593 T1567.002
Required data connectors	CyfirmaDigitalRiskAlertsConnector
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 Digital Risk/Analytic Rules/SPEConfidentialFilesHighRule.yaml
Version	1.0.1
Arm template	67e9c4aa-a2fa-4e4e-9272-1a8da41475c6.json

KQL

// High severity - Social and Public Exposure - Confidential Files Information Exposure
let timeFrame = 5m;
CyfirmaSPEConfidentialFilesAlerts_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,
    AssetType=asset_type,
    AssetValue=signature,
    Impact=impact,
    Recommendation=recommendation,
    ProviderName='CYFIRMA',
    ProductName='DeCYFIR/DeTCT',
    AlertTitle=Alert_title
| project
    TimeGenerated,
    Description,
    RiskScore,
    FirstSeen,
    LastSeen,
    AlertUID,
    UID,
    AssetType,
    AssetValue,
    Impact,
    Recommendation,
    ProductName,
    ProviderName,
    AlertTitle

YAML

relevantTechniques:
- T1189
- T1213
- T1593
- T1567.002
queryPeriod: 5m
triggerOperator: gt
eventGroupingSettings:
  aggregationKind: AlertPerResult
version: 1.0.1
OriginalUri: https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/Cyfirma Digital Risk/Analytic Rules/SPEConfidentialFilesHighRule.yaml
description: |
  "This rule detects high-severity alerts from CYFIRMA regarding exposure of confidential files or forms linked to internal or client-related information, publicly accessible on platforms. 
  These exposures could lead to data leakage, compliance violations, or targeted attacks."  
tactics:
- InitialAccess
- Exfiltration
- Collection
- Reconnaissance
severity: High
status: Available
kind: Scheduled
triggerThreshold: 0
queryFrequency: 5m
alertDetailsOverride:
  alertDisplayNameFormat: 'Cyfirma - High Severity Alert: Confidential Files Information Exposure on Public Platforms - {{AlertTitle}}  '
  alertDescriptionFormat: '{{Description}} '
  alertDynamicProperties:
  - alertProperty: ProductName
    value: ProductName
  - alertProperty: ProviderName
    value: ProviderName
requiredDataConnectors:
- dataTypes:
  - CyfirmaSPEConfidentialFilesAlerts_CL
  connectorId: CyfirmaDigitalRiskAlertsConnector
incidentConfiguration:
  createIncident: true
  groupingConfiguration:
    enabled: false
    reopenClosedIncident: false
    matchingMethod: AllEntities
    lookbackDuration: PT5H
id: 67e9c4aa-a2fa-4e4e-9272-1a8da41475c6
customDetails:
  LastSeen: LastSeen
  UID: UID
  Impact: Impact
  AssetType: AssetType
  Recommendation: Recommendation
  FirstSeen: FirstSeen
  Description: Description
  TimeGenerated: TimeGenerated
  AssetValue: AssetValue
  AlertUID: AlertUID
  RiskScore: RiskScore
query: |
  // High severity - Social and Public Exposure - Confidential Files Information Exposure
  let timeFrame = 5m;
  CyfirmaSPEConfidentialFilesAlerts_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,
      AssetType=asset_type,
      AssetValue=signature,
      Impact=impact,
      Recommendation=recommendation,
      ProviderName='CYFIRMA',
      ProductName='DeCYFIR/DeTCT',
      AlertTitle=Alert_title
  | project
      TimeGenerated,
      Description,
      RiskScore,
      FirstSeen,
      LastSeen,
      AlertUID,
      UID,
      AssetType,
      AssetValue,
      Impact,
      Recommendation,
      ProductName,
      ProviderName,
      AlertTitle  
name: CYFIRMA - Social and Public Exposure - Confidential Files Information Exposure Rule

ARM