CYFIRMA - Brand Intelligence - Malicious Mobile App Medium Rule

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Id	b73e6628-d44c-4ad3-a801-ea225c5744ee
Rulename	CYFIRMA - Brand Intelligence - Malicious Mobile App Medium 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	Medium
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 Brand Intelligence/Analytic Rules/BIMaliciousMobileAppMediumRule.yaml
Version	1.0.1
Arm template	b73e6628-d44c-4ad3-a801-ea225c5744ee.json

KQL

// Medium severity - Malicious Mobile App Impersonation
let timeFrame = 5m;
CyfirmaBIMaliciousMobileAppsAlerts_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=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

kind: Scheduled
customDetails:
  AssetType: AssetType
  UID: UID
  AssetValue: AssetValue
  Description: Description
  RiskScore: RiskScore
  TimeGenerated: TimeGenerated
  AlertUID: AlertUID
  Impact: Impact
  FirstSeen: FirstSeen
  Recommendation: Recommendation
  LastSeen: LastSeen
alertDetailsOverride:
  alertDisplayNameFormat: 'CYFIRMA - Medium Severity Alert: Malicious Mobile App Impersonating Brand Detected - {{AssetType}} - {{AssetValue}} '
  alertDescriptionFormat: '{{Description}} '
  alertDynamicProperties:
  - value: ProductName
    alertProperty: ProductName
  - value: ProviderName
    alertProperty: ProviderName
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: Medium
queryFrequency: 5m
incidentConfiguration:
  groupingConfiguration:
    reopenClosedIncident: false
    matchingMethod: AllEntities
    lookbackDuration: PT5H
    enabled: false
  createIncident: true
triggerThreshold: 0
relevantTechniques:
- T1406
- T1414
- T1437
- T1583.001
- T1204.002
eventGroupingSettings:
  aggregationKind: AlertPerResult
status: Available
version: 1.0.1
name: CYFIRMA - Brand Intelligence - Malicious Mobile App Medium Rule
id: b73e6628-d44c-4ad3-a801-ea225c5744ee
query: |
  // Medium severity - Malicious Mobile App Impersonation
  let timeFrame = 5m;
  CyfirmaBIMaliciousMobileAppsAlerts_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=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  
requiredDataConnectors:
- dataTypes:
  - CyfirmaBIMaliciousMobileAppsAlerts_CL
  connectorId: CyfirmaBrandIntelligenceAlertsDC
tactics:
- ResourceDevelopment
- Execution
- DefenseEvasion
- CredentialAccess
- CommandAndControl
triggerOperator: gt
OriginalUri: https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/Cyfirma Brand Intelligence/Analytic Rules/BIMaliciousMobileAppMediumRule.yaml
queryPeriod: 5m

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/b73e6628-d44c-4ad3-a801-ea225c5744ee')]",
      "kind": "Scheduled",
      "name": "[concat(parameters('workspace'),'/Microsoft.SecurityInsights/b73e6628-d44c-4ad3-a801-ea225c5744ee')]",
      "properties": {
        "alertDetailsOverride": {
          "alertDescriptionFormat": "{{Description}} ",
          "alertDisplayNameFormat": "CYFIRMA - Medium Severity Alert: Malicious Mobile App Impersonating Brand Detected - {{AssetType}} - {{AssetValue}} ",
          "alertDynamicProperties": [
            {
              "alertProperty": "ProductName",
              "value": "ProductName"
            },
            {
              "alertProperty": "ProviderName",
              "value": "ProviderName"
            }
          ]
        },
        "alertRuleTemplateName": "b73e6628-d44c-4ad3-a801-ea225c5744ee",
        "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 Medium 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 Brand Intelligence/Analytic Rules/BIMaliciousMobileAppMediumRule.yaml",
        "query": "// Medium severity - Malicious Mobile App Impersonation\nlet timeFrame = 5m;\nCyfirmaBIMaliciousMobileAppsAlerts_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=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": "Medium",
        "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"
    }
  ]
}