XbowNewAssetDiscovered

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Id	e4c6a8b2-9d7f-4285-a1e3-6b9c2e4f1a85
Rulename	XbowNewAssetDiscovered
Description	Alerts when a new asset is registered in XBOW for the first time. This is detected by matching assets whose CreatedAt timestamp falls within the current query window, indicating the asset was newly added rather than updated. This helps track shadow IT, new deployments, and any unexpected expansion of the external attack surface.
Severity	Medium
Tactics	Reconnaissance Discovery
Techniques	T1595
Required data connectors	XbowSecurityConnector
Kind	Scheduled
Query frequency	30m
Query period	1h
Trigger threshold	0
Trigger operator	gt
Source Uri	https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/XBOW/Analytic Rules/XbowNewAssetDiscovered.yaml
Version	1.0.0
Arm template	e4c6a8b2-9d7f-4285-a1e3-6b9c2e4f1a85.json

KQL

XbowAssets_CL
| where TimeGenerated > ago(1h)
// Only match assets created within the query window (new, not updated)
| where todatetime(CreatedAt) > ago(1h)
| summarize arg_max(TimeGenerated, *) by AssetId
| project
    TimeGenerated,
    AssetId,
    AssetName,
    StartUrl,
    Lifecycle,
    Sku,
    OrganizationId,
    CreatedAt,
    UpdatedAt,
    AssetReachableState,
    AssetReachableMessage

YAML

incidentConfiguration:
  createIncident: true
  groupingConfiguration:
    groupByCustomDetails:
    - AssetId
    matchingMethod: Selected
    groupByAlertDetails: []
    groupByEntities: []
    lookbackDuration: 6h
    enabled: true
    reopenClosedIncident: false
requiredDataConnectors:
- dataTypes:
  - XbowAssets_CL
  connectorId: XbowSecurityConnector
relevantTechniques:
- T1595
triggerOperator: gt
customDetails:
  Lifecycle: Lifecycle
  StartUrl: StartUrl
  AssetName: AssetName
  CreatedAt: CreatedAt
  Sku: Sku
  AssetReachableState: AssetReachableState
  AssetId: AssetId
  OrganizationId: OrganizationId
queryFrequency: 30m
severity: Medium
triggerThreshold: 0
entityMappings:
- fieldMappings:
  - columnName: StartUrl
    identifier: Url
  entityType: URL
alertDetailsOverride:
  alertDescriptionFormat: 'New asset registered in XBOW: {{AssetName}} ({{StartUrl}}). Reachability: {{AssetReachableState}}'
  alertDisplayNameFormat: 'XBOW New Asset: {{AssetName}}'
name: XbowNewAssetDiscovered
query: |
  XbowAssets_CL
  | where TimeGenerated > ago(1h)
  // Only match assets created within the query window (new, not updated)
  | where todatetime(CreatedAt) > ago(1h)
  | summarize arg_max(TimeGenerated, *) by AssetId
  | project
      TimeGenerated,
      AssetId,
      AssetName,
      StartUrl,
      Lifecycle,
      Sku,
      OrganizationId,
      CreatedAt,
      UpdatedAt,
      AssetReachableState,
      AssetReachableMessage  
version: 1.0.0
tactics:
- Reconnaissance
- Discovery
queryPeriod: 1h
description: |
  Alerts when a new asset is registered in XBOW for the first time. This is detected by
  matching assets whose CreatedAt timestamp falls within the current query window,
  indicating the asset was newly added rather than updated. This helps track shadow IT,
  new deployments, and any unexpected expansion of the external attack surface.  
kind: Scheduled
id: e4c6a8b2-9d7f-4285-a1e3-6b9c2e4f1a85
OriginalUri: https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/XBOW/Analytic Rules/XbowNewAssetDiscovered.yaml
eventGroupingSettings:
  aggregationKind: AlertPerResult
status: Available

ARM