CYFIRMA - Brand Intelligence - Malicious Mobile App High Rule

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Id	3176ac89-b195-48b7-a01e-740a6b26fb2f
Rulename	CYFIRMA - Brand Intelligence - Malicious Mobile App High Rule
Description	“This analytic rule detects instances where malicious or unauthorized mobile applications are discovered mimicking legitimate brand assets. Such impersonations may be distributed through unofficial app stores or third-party websites, potentially deceiving customers, harvesting sensitive data, or damaging brand reputation. This alert is triggered when CYFIRMA threat intelligence identifies a suspicious mobile app associated with the organization’s brand or product names.”
Severity	High
Tactics	ResourceDevelopment Execution DefenseEvasion CredentialAccess CommandAndControl
Techniques	T1406 T1414 T1437 T1583.001 T1204.002
Required data connectors	CyfirmaBrandIntelligenceAlertsDC
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%20Brand%20Intelligence/Analytic%20Rules/BIMaliciousMobileAppHighRule.yaml
Version	1.0.1
Arm template	3176ac89-b195-48b7-a01e-740a6b26fb2f.json

KQL

// High severity - Malicious Mobile App Impersonation
let timeFrame = 5m;
CyfirmaBIMaliciousMobileAppsAlerts_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=asset_value,
    Impact=impact,
    Recommendation=recommendation,
    ProviderName='CYFIRMA',
    ProductName='DeCYFIR/DeTCT'
| project
    TimeGenerated,
    Description,
    RiskScore,
    FirstSeen,
    LastSeen,
    AlertUID,
    UID,
    AssetType,
    AssetValue,
    Impact,
    Recommendation,
    ProductName,
    ProviderName

YAML

severity: High
tactics:
- ResourceDevelopment
- Execution
- DefenseEvasion
- CredentialAccess
- CommandAndControl
queryFrequency: 5m
id: 3176ac89-b195-48b7-a01e-740a6b26fb2f
query: |
  // High severity - Malicious Mobile App Impersonation
  let timeFrame = 5m;
  CyfirmaBIMaliciousMobileAppsAlerts_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=asset_value,
      Impact=impact,
      Recommendation=recommendation,
      ProviderName='CYFIRMA',
      ProductName='DeCYFIR/DeTCT'
  | project
      TimeGenerated,
      Description,
      RiskScore,
      FirstSeen,
      LastSeen,
      AlertUID,
      UID,
      AssetType,
      AssetValue,
      Impact,
      Recommendation,
      ProductName,
      ProviderName
incidentConfiguration:
  groupingConfiguration:
    lookbackDuration: PT5H
    matchingMethod: AllEntities
    reopenClosedIncident: false
    enabled: false
  createIncident: true
customDetails:
  Impact: Impact
  Description: Description
  UID: UID
  RiskScore: RiskScore
  AlertUID: AlertUID
  TimeGenerated: TimeGenerated
  AssetValue: AssetValue
  FirstSeen: FirstSeen
  LastSeen: LastSeen
  AssetType: AssetType
  Recommendation: Recommendation
kind: Scheduled
triggerOperator: gt
name: CYFIRMA - Brand Intelligence - Malicious Mobile App High Rule
version: 1.0.1
status: Available
requiredDataConnectors:
- dataTypes:
  - CyfirmaBIMaliciousMobileAppsAlerts_CL
  connectorId: CyfirmaBrandIntelligenceAlertsDC
description: |
  "This analytic rule detects instances where malicious or unauthorized mobile applications are discovered mimicking legitimate brand assets. 
  Such impersonations may be distributed through unofficial app stores or third-party websites, potentially deceiving customers, harvesting sensitive data, or damaging brand reputation. 
  This alert is triggered when CYFIRMA threat intelligence identifies a suspicious mobile app associated with the organization's brand or product names."
relevantTechniques:
- T1406
- T1414
- T1437
- T1583.001
- T1204.002
queryPeriod: 5m
OriginalUri: https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/Cyfirma%20Brand%20Intelligence/Analytic%20Rules/BIMaliciousMobileAppHighRule.yaml
triggerThreshold: 0
eventGroupingSettings:
  aggregationKind: AlertPerResult
alertDetailsOverride:
  alertDisplayNameFormat: 'CYFIRMA - High Severity Alert: Malicious Mobile App Impersonating Brand Detected - {{AssetType}} - {{AssetValue}} '
  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/3176ac89-b195-48b7-a01e-740a6b26fb2f')]",
      "kind": "Scheduled",
      "name": "[concat(parameters('workspace'),'/Microsoft.SecurityInsights/3176ac89-b195-48b7-a01e-740a6b26fb2f')]",
      "properties": {
        "alertDetailsOverride": {
          "alertDescriptionFormat": "{{Description}} ",
          "alertDisplayNameFormat": "CYFIRMA - High Severity Alert: Malicious Mobile App Impersonating Brand Detected - {{AssetType}} - {{AssetValue}} ",
          "alertDynamicProperties": [
            {
              "alertProperty": "ProductName",
              "value": "ProductName"
            },
            {
              "alertProperty": "ProviderName",
              "value": "ProviderName"
            }
          ]
        },
        "alertRuleTemplateName": "3176ac89-b195-48b7-a01e-740a6b26fb2f",
        "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 analytic rule detects instances where malicious or unauthorized mobile applications are discovered mimicking legitimate brand assets. \nSuch impersonations may be distributed through unofficial app stores or third-party websites, potentially deceiving customers, harvesting sensitive data, or damaging brand reputation. \nThis alert is triggered when CYFIRMA threat intelligence identifies a suspicious mobile app associated with the organization's brand or product names.\"\n",
        "displayName": "CYFIRMA - Brand Intelligence - Malicious Mobile App High 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%20Brand%20Intelligence/Analytic%20Rules/BIMaliciousMobileAppHighRule.yaml",
        "query": "// High severity - Malicious Mobile App Impersonation\nlet timeFrame = 5m;\nCyfirmaBIMaliciousMobileAppsAlerts_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=asset_value,\n    Impact=impact,\n    Recommendation=recommendation,\n    ProviderName='CYFIRMA',\n    ProductName='DeCYFIR/DeTCT'\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",
        "queryFrequency": "PT5M",
        "queryPeriod": "PT5M",
        "severity": "High",
        "status": "Available",
        "subTechniques": [
          "T1583.001",
          "T1204.002"
        ],
        "suppressionDuration": "PT1H",
        "suppressionEnabled": false,
        "tactics": [
          "CommandAndControl",
          "CredentialAccess",
          "DefenseEvasion",
          "Execution",
          "ResourceDevelopment"
        ],
        "techniques": [
          "T1204",
          "T1583"
        ],
        "templateVersion": "1.0.1",
        "triggerOperator": "GreaterThan",
        "triggerThreshold": 0
      },
      "type": "Microsoft.OperationalInsights/workspaces/providers/alertRules"
    }
  ]
}