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	1.0.0
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

tactics:
- InitialAccess
- Exfiltration
- Collection
- Reconnaissance
name: CYFIRMA - Social and Public Exposure - Confidential Files Information Exposure Rule
id: a2984be5-8d69-4139-b98f-e89c9c421c27
requiredDataConnectors:
- connectorId: CyfirmaDigitalRiskAlertsConnector
  dataTypes:
  - CyfirmaSPEConfidentialFilesAlerts_CL
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  
eventGroupingSettings:
  aggregationKind: AlertPerResult
relevantTechniques:
- T1189
- T1213
- T1593
- T1567.002
incidentConfiguration:
  createIncident: true
  groupingConfiguration:
    matchingMethod: AllEntities
    reopenClosedIncident: false
    lookbackDuration: 5h
    enabled: false
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."  
triggerOperator: gt
queryPeriod: 5m
severity: Medium
OriginalUri: https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/Cyfirma Digital Risk/Analytic Rules/SPEConfidentialFilesMediumRule.yaml
version: 1.0.0
alertDetailsOverride:
  alertDynamicProperties:
  - alertProperty: ProductName
    value: ProductName
  - alertProperty: ProviderName
    value: ProviderName
  alertDisplayNameFormat: 'Cyfirma - Medium Severity Alert: Confidential Files Information Exposure on Public Platforms - {{AlertTitle}}  '
  alertDescriptionFormat: '{{Description}} '
triggerThreshold: 0
queryFrequency: 5m
kind: Scheduled
status: Available
customDetails:
  RiskScore: RiskScore
  AssetType: AssetType
  FirstSeen: FirstSeen
  Recommendation: Recommendation
  Impact: Impact
  TimeGenerated: TimeGenerated
  AssetValue: AssetValue
  Description: Description
  LastSeen: LastSeen
  AlertUID: AlertUID
  UID: UID

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/a2984be5-8d69-4139-b98f-e89c9c421c27')]",
      "kind": "Scheduled",
      "name": "[concat(parameters('workspace'),'/Microsoft.SecurityInsights/a2984be5-8d69-4139-b98f-e89c9c421c27')]",
      "properties": {
        "alertDetailsOverride": {
          "alertDescriptionFormat": "{{Description}} ",
          "alertDisplayNameFormat": "Cyfirma - Medium Severity Alert: Confidential Files Information Exposure on Public Platforms - {{AlertTitle}}  ",
          "alertDynamicProperties": [
            {
              "alertProperty": "ProductName",
              "value": "ProductName"
            },
            {
              "alertProperty": "ProviderName",
              "value": "ProviderName"
            }
          ]
        },
        "alertRuleTemplateName": "a2984be5-8d69-4139-b98f-e89c9c421c27",
        "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 Medium-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 Digital Risk/Analytic Rules/SPEConfidentialFilesMediumRule.yaml",
        "query": "// Medium severity - Social and Public Exposure - Confidential Files Information Exposure\nlet timeFrame = 5m;\nCyfirmaSPEConfidentialFilesAlerts_CL\n| where severity == 'High' 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": "Medium",
        "status": "Available",
        "subTechniques": [
          "T1567.002"
        ],
        "suppressionDuration": "PT1H",
        "suppressionEnabled": false,
        "tactics": [
          "Collection",
          "Exfiltration",
          "InitialAccess",
          "Reconnaissance"
        ],
        "techniques": [
          "T1189",
          "T1213",
          "T1567",
          "T1593"
        ],
        "templateVersion": "1.0.0",
        "triggerOperator": "GreaterThan",
        "triggerThreshold": 0
      },
      "type": "Microsoft.OperationalInsights/workspaces/providers/alertRules"
    }
  ]
}