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

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

ARM