CYFIRMA - Social and Public Exposure - Source Code Exposure on Public Repositories Rule

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Id	28e315a3-725d-4261-a6c2-e597d51541f4
Rulename	CYFIRMA - Social and Public Exposure - Source Code Exposure on Public Repositories Rule
Description	“This rule triggers when CYFIRMA detects source code related to internal or enterprise domains exposed on public platforms like GitHub. Such exposure may lead to intellectual property leakage or help adversaries understand internal systems, increasing the risk of targeted attacks.”
Severity	Medium
Tactics	ResourceDevelopment CredentialAccess Discovery
Techniques	T1587.001 T1606.001 T1082
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/SPESourceCodeExposureMediumRule.yaml
Version	1.0.1
Arm template	28e315a3-725d-4261-a6c2-e597d51541f4.json

KQL

// Medium severity - Social and Public Exposure - Source Code Exposure on Public Repositories
let timeFrame = 5m;
CyfirmaSPESourceCodeAlerts_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,
    Source=source,
    Impact=impact,
    Recommendation=recommendation,
    ProviderName='CYFIRMA',
    ProductName='DeCYFIR/DeTCT',
    AlertTitle=Alert_title
| project
    TimeGenerated,
    Description,
    RiskScore,
    FirstSeen,
    LastSeen,
    AlertUID,
    UID,
    AssetType,
    AssetValue,
    Impact,
    ProductName,
    ProviderName,
    AlertTitle

YAML

severity: Medium
tactics:
- ResourceDevelopment
- CredentialAccess
- Discovery
queryFrequency: 5m
id: 28e315a3-725d-4261-a6c2-e597d51541f4
query: |
  // Medium severity - Social and Public Exposure - Source Code Exposure on Public Repositories
  let timeFrame = 5m;
  CyfirmaSPESourceCodeAlerts_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,
      Source=source,
      Impact=impact,
      Recommendation=recommendation,
      ProviderName='CYFIRMA',
      ProductName='DeCYFIR/DeTCT',
      AlertTitle=Alert_title
  | project
      TimeGenerated,
      Description,
      RiskScore,
      FirstSeen,
      LastSeen,
      AlertUID,
      UID,
      AssetType,
      AssetValue,
      Impact,
      ProductName,
      ProviderName,
      AlertTitle
incidentConfiguration:
  groupingConfiguration:
    lookbackDuration: PT5H
    matchingMethod: AllEntities
    reopenClosedIncident: false
    enabled: false
  createIncident: true
customDetails:
  Impact: Impact
  Description: Description
  UID: UID
  AssetType: AssetType
  AlertUID: AlertUID
  FirstSeen: FirstSeen
  AssetValue: AssetValue
  LastSeen: LastSeen
  RiskScore: RiskScore
  TimeGenerated: TimeGenerated
kind: Scheduled
triggerOperator: gt
name: CYFIRMA - Social and Public Exposure - Source Code Exposure on Public Repositories Rule
version: 1.0.1
status: Available
requiredDataConnectors:
- dataTypes:
  - CyfirmaSPESourceCodeAlerts_CL
  connectorId: CyfirmaDigitalRiskAlertsConnector
description: |
  "This rule triggers when CYFIRMA detects source code related to internal or enterprise domains exposed on public platforms like GitHub. 
  Such exposure may lead to intellectual property leakage or help adversaries understand internal systems, increasing the risk of targeted attacks."
relevantTechniques:
- T1587.001
- T1606.001
- T1082
queryPeriod: 5m
OriginalUri: https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/Cyfirma%20Digital%20Risk/Analytic%20Rules/SPESourceCodeExposureMediumRule.yaml
triggerThreshold: 0
eventGroupingSettings:
  aggregationKind: AlertPerResult
alertDetailsOverride:
  alertDisplayNameFormat: 'CYFIRMA Medium Severity Alert - Source Code Exposure on Public Repositories - {{AlertTitle}} '
  alertDescriptionFormat: '{{Description}} '
  alertDynamicProperties:
  - alertProperty: ProductName
    value: ProductName
  - alertProperty: ProviderName
    value: ProviderName

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/28e315a3-725d-4261-a6c2-e597d51541f4')]",
      "kind": "Scheduled",
      "name": "[concat(parameters('workspace'),'/Microsoft.SecurityInsights/28e315a3-725d-4261-a6c2-e597d51541f4')]",
      "properties": {
        "alertDetailsOverride": {
          "alertDescriptionFormat": "{{Description}} ",
          "alertDisplayNameFormat": "CYFIRMA Medium Severity Alert - Source Code Exposure on Public Repositories - {{AlertTitle}} ",
          "alertDynamicProperties": [
            {
              "alertProperty": "ProductName",
              "value": "ProductName"
            },
            {
              "alertProperty": "ProviderName",
              "value": "ProviderName"
            }
          ]
        },
        "alertRuleTemplateName": "28e315a3-725d-4261-a6c2-e597d51541f4",
        "customDetails": {
          "AlertUID": "AlertUID",
          "AssetType": "AssetType",
          "AssetValue": "AssetValue",
          "Description": "Description",
          "FirstSeen": "FirstSeen",
          "Impact": "Impact",
          "LastSeen": "LastSeen",
          "RiskScore": "RiskScore",
          "TimeGenerated": "TimeGenerated",
          "UID": "UID"
        },
        "description": "\"This rule triggers when CYFIRMA detects source code related to internal or enterprise domains exposed on public platforms like GitHub. \nSuch exposure may lead to intellectual property leakage or help adversaries understand internal systems, increasing the risk of targeted attacks.\"\n",
        "displayName": "CYFIRMA - Social and Public Exposure - Source Code Exposure on Public Repositories 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/SPESourceCodeExposureMediumRule.yaml",
        "query": "// Medium severity - Social and Public Exposure - Source Code Exposure on Public Repositories\nlet timeFrame = 5m;\nCyfirmaSPESourceCodeAlerts_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    Source=source,\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    ProductName,\n    ProviderName,\n    AlertTitle\n",
        "queryFrequency": "PT5M",
        "queryPeriod": "PT5M",
        "severity": "Medium",
        "status": "Available",
        "subTechniques": [
          "T1587.001",
          "T1606.001"
        ],
        "suppressionDuration": "PT1H",
        "suppressionEnabled": false,
        "tactics": [
          "CredentialAccess",
          "Discovery",
          "ResourceDevelopment"
        ],
        "techniques": [
          "T1082",
          "T1587",
          "T1606"
        ],
        "templateVersion": "1.0.1",
        "triggerOperator": "GreaterThan",
        "triggerThreshold": 0
      },
      "type": "Microsoft.OperationalInsights/workspaces/providers/alertRules"
    }
  ]
}