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%20Digital%20Risk/Analytic%20Rules/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

incidentConfiguration:
  groupingConfiguration:
    lookbackDuration: PT5H
    reopenClosedIncident: false
    matchingMethod: AllEntities
    enabled: false
  createIncident: true
name: CYFIRMA - Social and Public Exposure - Confidential Files Information Exposure Rule
triggerOperator: gt
kind: Scheduled
queryFrequency: 5m
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."
id: 67e9c4aa-a2fa-4e4e-9272-1a8da41475c6
triggerThreshold: 0
queryPeriod: 5m
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
version: 1.0.1
customDetails:
  Impact: Impact
  RiskScore: RiskScore
  Recommendation: Recommendation
  LastSeen: LastSeen
  Description: Description
  AssetType: AssetType
  UID: UID
  TimeGenerated: TimeGenerated
  AssetValue: AssetValue
  FirstSeen: FirstSeen
  AlertUID: AlertUID
status: Available
eventGroupingSettings:
  aggregationKind: AlertPerResult
severity: High
requiredDataConnectors:
- connectorId: CyfirmaDigitalRiskAlertsConnector
  dataTypes:
  - CyfirmaSPEConfidentialFilesAlerts_CL
OriginalUri: https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/Cyfirma%20Digital%20Risk/Analytic%20Rules/SPEConfidentialFilesHighRule.yaml
alertDetailsOverride:
  alertDescriptionFormat: '{{Description}} '
  alertDisplayNameFormat: 'Cyfirma - High Severity Alert: Confidential Files Information Exposure on Public Platforms - {{AlertTitle}}  '
  alertDynamicProperties:
  - value: ProductName
    alertProperty: ProductName
  - value: ProviderName
    alertProperty: ProviderName
relevantTechniques:
- T1189
- T1213
- T1593
- T1567.002
tactics:
- InitialAccess
- Exfiltration
- Collection
- Reconnaissance

ARM

{
  "$schema": "https://schema.management.azure.com/schemas/2019-04-01/deploymentTemplate.json#",
  "contentVersion": "1.0.0.0",
  "parameters": {
    "workspace": {
      "type": "String"
    }
  },
  "resources": [
    {
      "apiVersion": "2024-01-01-preview",
      "id": "[concat(resourceId('Microsoft.OperationalInsights/workspaces/providers', parameters('workspace'), 'Microsoft.SecurityInsights'),'/alertRules/67e9c4aa-a2fa-4e4e-9272-1a8da41475c6')]",
      "kind": "Scheduled",
      "name": "[concat(parameters('workspace'),'/Microsoft.SecurityInsights/67e9c4aa-a2fa-4e4e-9272-1a8da41475c6')]",
      "properties": {
        "alertDetailsOverride": {
          "alertDescriptionFormat": "{{Description}} ",
          "alertDisplayNameFormat": "Cyfirma - High Severity Alert: Confidential Files Information Exposure on Public Platforms - {{AlertTitle}}  ",
          "alertDynamicProperties": [
            {
              "alertProperty": "ProductName",
              "value": "ProductName"
            },
            {
              "alertProperty": "ProviderName",
              "value": "ProviderName"
            }
          ]
        },
        "alertRuleTemplateName": "67e9c4aa-a2fa-4e4e-9272-1a8da41475c6",
        "customDetails": {
          "AlertUID": "AlertUID",
          "AssetType": "AssetType",
          "AssetValue": "AssetValue",
          "Description": "Description",
          "FirstSeen": "FirstSeen",
          "Impact": "Impact",
          "LastSeen": "LastSeen",
          "Recommendation": "Recommendation",
          "RiskScore": "RiskScore",
          "TimeGenerated": "TimeGenerated",
          "UID": "UID"
        },
        "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. \nThese exposures could lead to data leakage, compliance violations, or targeted attacks.\"\n",
        "displayName": "CYFIRMA - Social and Public Exposure - Confidential Files Information Exposure Rule",
        "enabled": true,
        "entityMappings": null,
        "eventGroupingSettings": {
          "aggregationKind": "AlertPerResult"
        },
        "incidentConfiguration": {
          "createIncident": true,
          "groupingConfiguration": {
            "enabled": false,
            "lookbackDuration": "PT5H",
            "matchingMethod": "AllEntities",
            "reopenClosedIncident": false
          }
        },
        "OriginalUri": "https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/Cyfirma%20Digital%20Risk/Analytic%20Rules/SPEConfidentialFilesHighRule.yaml",
        "query": "// High severity - Social and Public Exposure - Confidential Files Information Exposure\nlet timeFrame = 5m;\nCyfirmaSPEConfidentialFilesAlerts_CL\n| where severity == 'Critical' and TimeGenerated between (ago(timeFrame) .. now())\n| extend\n    Description=description,\n    FirstSeen=first_seen,\n    LastSeen=last_seen,\n    RiskScore=risk_score,\n    AlertUID=alert_uid,\n    UID=uid,\n    AssetType=asset_type,\n    AssetValue=signature,\n    Impact=impact,\n    Recommendation=recommendation,\n    ProviderName='CYFIRMA',\n    ProductName='DeCYFIR/DeTCT',\n    AlertTitle=Alert_title\n| project\n    TimeGenerated,\n    Description,\n    RiskScore,\n    FirstSeen,\n    LastSeen,\n    AlertUID,\n    UID,\n    AssetType,\n    AssetValue,\n    Impact,\n    Recommendation,\n    ProductName,\n    ProviderName,\n    AlertTitle\n",
        "queryFrequency": "PT5M",
        "queryPeriod": "PT5M",
        "severity": "High",
        "status": "Available",
        "subTechniques": [
          "T1567.002"
        ],
        "suppressionDuration": "PT1H",
        "suppressionEnabled": false,
        "tactics": [
          "Collection",
          "Exfiltration",
          "InitialAccess",
          "Reconnaissance"
        ],
        "techniques": [
          "T1189",
          "T1213",
          "T1567",
          "T1593"
        ],
        "templateVersion": "1.0.1",
        "triggerOperator": "GreaterThan",
        "triggerThreshold": 0
      },
      "type": "Microsoft.OperationalInsights/workspaces/providers/alertRules"
    }
  ]
}