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

queryFrequency: 5m
incidentConfiguration:
  createIncident: true
  groupingConfiguration:
    lookbackDuration: PT5H
    matchingMethod: AllEntities
    enabled: false
    reopenClosedIncident: false
triggerThreshold: 0
triggerOperator: gt
severity: Medium
OriginalUri: https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/Cyfirma%20Digital%20Risk/Analytic%20Rules/SPEConfidentialFilesMediumRule.yaml
eventGroupingSettings:
  aggregationKind: AlertPerResult
alertDetailsOverride:
  alertDisplayNameFormat: 'Cyfirma - Medium Severity Alert: Confidential Files Information Exposure on Public Platforms - {{AlertTitle}}  '
  alertDynamicProperties:
  - alertProperty: ProductName
    value: ProductName
  - alertProperty: ProviderName
    value: ProviderName
  alertDescriptionFormat: '{{Description}} '
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
tactics:
- InitialAccess
- Exfiltration
- Collection
- Reconnaissance
queryPeriod: 5m
customDetails:
  FirstSeen: FirstSeen
  UID: UID
  Impact: Impact
  AlertUID: AlertUID
  Recommendation: Recommendation
  Description: Description
  AssetType: AssetType
  RiskScore: RiskScore
  AssetValue: AssetValue
  TimeGenerated: TimeGenerated
  LastSeen: LastSeen
relevantTechniques:
- T1189
- T1213
- T1593
- T1567.002
name: CYFIRMA - Social and Public Exposure - Confidential Files Information Exposure Rule
requiredDataConnectors:
- connectorId: CyfirmaDigitalRiskAlertsConnector
  dataTypes:
  - CyfirmaSPEConfidentialFilesAlerts_CL
id: a2984be5-8d69-4139-b98f-e89c9c421c27
version: 1.0.1
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."
kind: Scheduled
status: Available

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%20Digital%20Risk/Analytic%20Rules/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": "1.0.1",
        "triggerOperator": "GreaterThan",
        "triggerThreshold": 0
      },
      "type": "Microsoft.OperationalInsights/workspaces/providers/alertRules"
    }
  ]
}