Awake Security - High Match Counts By Device

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Id	90b7ac11-dd6c-4ba1-a99b-737061873859
Rulename	Awake Security - High Match Counts By Device
Description	This query searches for devices with unexpectedly large number of activity match.
Severity	Medium
Required data connectors	CefAma
Kind	Scheduled
Query frequency	1h
Query period	1h
Trigger threshold	0
Trigger operator	gt
Source Uri	https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/AristaAwakeSecurity/Analytic Rules/HighMatchCountsByDevice.yaml
Version	1.0.2
Arm template	90b7ac11-dd6c-4ba1-a99b-737061873859.json

KQL

CommonSecurityLog
| where DeviceVendor == "Arista Networks" and DeviceProduct == "Awake Security"
| summarize StartTime=min(TimeGenerated), EndTime=max(TimeGenerated), Models=make_set(Activity), ASPMatchURLs=make_set(DeviceCustomString2), SourceIPs=make_set(SourceIP),
  DestinationIPs=make_set(DestinationIP), ModelMatchCount=sum(EventCount), MaxSeverity=max(toint(LogSeverity)) by SourceHostName
| where ModelMatchCount > 1000 and MaxSeverity > 2
| extend SeverityName=iff(MaxSeverity == 0, "Informational", iff(MaxSeverity < 5, "Low", iff(MaxSeverity < 8, "Medium", "High")))

YAML

alertDetailsOverride:
  alertTacticsColumnName: 
  alertSeverityColumnName: SeverityName
  alertDescriptionFormat: |-
    The following Awake model(s):

    {{Models}}

    matched {{ModelMatchCount}} activities, an unexpectedly large number. The destination IPs associated with these matches were:

    {{DestinationIPs}}    
  alertDisplayNameFormat: Awake Security - High Model Match Counts On Device {{SourceHostName}}
relevantTechniques: []
name: Awake Security - High Match Counts By Device
queryFrequency: 1h
version: 1.0.2
incidentConfiguration:
  groupingConfiguration:
    groupByEntities:
    - Host
    matchingMethod: Selected
    enabled: true
    groupByCustomDetails:
    - Device
    lookbackDuration: 3d
    groupByAlertDetails: []
    reopenClosedIncident: true
  createIncident: true
triggerThreshold: 0
severity: Medium
requiredDataConnectors:
- connectorId: CefAma
  dataTypes:
  - CommonSecurityLog
tactics: []
OriginalUri: https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/AristaAwakeSecurity/Analytic Rules/HighMatchCountsByDevice.yaml
query: |
  CommonSecurityLog
  | where DeviceVendor == "Arista Networks" and DeviceProduct == "Awake Security"
  | summarize StartTime=min(TimeGenerated), EndTime=max(TimeGenerated), Models=make_set(Activity), ASPMatchURLs=make_set(DeviceCustomString2), SourceIPs=make_set(SourceIP),
    DestinationIPs=make_set(DestinationIP), ModelMatchCount=sum(EventCount), MaxSeverity=max(toint(LogSeverity)) by SourceHostName
  | where ModelMatchCount > 1000 and MaxSeverity > 2
  | extend SeverityName=iff(MaxSeverity == 0, "Informational", iff(MaxSeverity < 5, "Low", iff(MaxSeverity < 8, "Medium", "High")))  
kind: Scheduled
entityMappings:
- fieldMappings:
  - columnName: SourceHostName
    identifier: HostName
  entityType: Host
- fieldMappings:
  - columnName: SourceIPs
    identifier: Address
  entityType: IP
queryPeriod: 1h
triggerOperator: gt
customDetails:
  Device: SourceHostName
  Matches_Max_Severity: MaxSeverity
  Matches_Count: ModelMatchCount
  Matched_Models: Models
  Matches_ASP_URLs: ASPMatchURLs
  Matches_Dest_IPs: DestinationIPs
eventGroupingSettings:
  aggregationKind: AlertPerResult
id: 90b7ac11-dd6c-4ba1-a99b-737061873859
status: Available
description: This query searches for devices with unexpectedly large number of activity match.

ARM