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

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Id	a2984be5-8d69-4139-b98f-e89c9c421c27
Rulename	CYFIRMA - Social and Public Exposure - Confidential Files Information Exposure Rule
Description	“This rule detects Medium-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	Medium
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/SPEConfidentialFilesMediumRule.yaml
Version	1.0.1
Arm template	a2984be5-8d69-4139-b98f-e89c9c421c27.json

KQL

// Medium severity - Social and Public Exposure - Confidential Files Information Exposure
let timeFrame = 5m;
CyfirmaSPEConfidentialFilesAlerts_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,
    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

version: 1.0.1
status: Available
queryPeriod: 5m
id: a2984be5-8d69-4139-b98f-e89c9c421c27
customDetails:
  RiskScore: RiskScore
  Impact: Impact
  AssetType: AssetType
  UID: UID
  TimeGenerated: TimeGenerated
  FirstSeen: FirstSeen
  Recommendation: Recommendation
  LastSeen: LastSeen
  AssetValue: AssetValue
  AlertUID: AlertUID
  Description: Description
tactics:
- InitialAccess
- Exfiltration
- Collection
- Reconnaissance
query: |
  // Medium severity - Social and Public Exposure - Confidential Files Information Exposure
  let timeFrame = 5m;
  CyfirmaSPEConfidentialFilesAlerts_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,
      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
incidentConfiguration:
  groupingConfiguration:
    reopenClosedIncident: false
    matchingMethod: AllEntities
    enabled: false
    lookbackDuration: PT5H
  createIncident: true
alertDetailsOverride:
  alertDynamicProperties:
  - alertProperty: ProductName
    value: ProductName
  - alertProperty: ProviderName
    value: ProviderName
  alertDescriptionFormat: '{{Description}} '
  alertDisplayNameFormat: 'Cyfirma - Medium Severity Alert: Confidential Files Information Exposure on Public Platforms - {{AlertTitle}}  '
queryFrequency: 5m
triggerThreshold: 0
eventGroupingSettings:
  aggregationKind: AlertPerResult
triggerOperator: gt
OriginalUri: https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/Cyfirma Digital Risk/Analytic Rules/SPEConfidentialFilesMediumRule.yaml
kind: Scheduled
relevantTechniques:
- T1189
- T1213
- T1593
- T1567.002
description: |
  "This rule detects Medium-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: Medium
requiredDataConnectors:
- connectorId: CyfirmaDigitalRiskAlertsConnector
  dataTypes:
  - CyfirmaSPEConfidentialFilesAlerts_CL

ARM