Illusive Incidents Analytic Rule

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Id	1a7dbcf6-21a2-4255-84b2-c8dbbdca4630
Rulename	Illusive Incidents Analytic Rule
Description	Create a Microsoft Sentinel incident upon a new Illusive alert (incident) and associate all related Illusive events to the relevant Microsoft Sentinel alert. This is done by filtering and processing Illusive Syslog messages.
Severity	Medium
Tactics	Persistence PrivilegeEscalation DefenseEvasion CredentialAccess LateralMovement
Techniques	T1078 T1098 T1548 T1021
Required data connectors	CefAma Illusive illusiveAttackManagementSystemAma
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/Illusive Platform/Analytic Rules/Illusive_Detection_Query.yaml
Version	1.0.5
Arm template	1a7dbcf6-21a2-4255-84b2-c8dbbdca4630.json

KQL

CommonSecurityLog
| where DeviceProduct == "illusive"
| extend DeviceCustomNumber2 = coalesce(column_ifexists("FieldDeviceCustomNumber2", long(null)),DeviceCustomNumber2)
| summarize arg_max(TimeGenerated, *) by DeviceCustomNumber2, AdditionalExtensions, TimeGenerated
| extend Category = extract(@'cat=([^;]+)(\;|$)', 1, AdditionalExtensions), HasForensics = extract(@'cs7=([^;]+)(\;|$)', 1, AdditionalExtensions)
| extend Category = coalesce(column_ifexists("DeviceEventCategory",""),Category)	
| where Category == "illusive:alerts"
| extend IncidentId = DeviceCustomNumber2, IncidentURL = DeviceCustomString5
| project TimeGenerated, SourceIP, SourceHostName,Computer , DeviceEventClassID ,HasForensics ,SourceUserName, Activity, DeviceAddress,  DestinationHostName, DestinationUserName, IncidentId, IncidentURL

YAML

triggerOperator: gt
queryFrequency: 5m
requiredDataConnectors:
- connectorId: Illusive
  dataTypes:
  - CommonSecurityLog
- connectorId: illusiveAttackManagementSystemAma
  dataTypes:
  - CommonSecurityLog
- connectorId: CefAma
  dataTypes:
  - CommonSecurityLog
relevantTechniques:
- T1078
- T1098
- T1548
- T1021
entityMappings:
- entityType: IP
  fieldMappings:
  - identifier: Address
    columnName: SourceIP
- entityType: Host
  fieldMappings:
  - identifier: FullName
    columnName: SourceHostName
- entityType: Host
  fieldMappings:
  - identifier: OMSAgentID
    columnName: Computer
query: |
  CommonSecurityLog
  | where DeviceProduct == "illusive"
  | extend DeviceCustomNumber2 = coalesce(column_ifexists("FieldDeviceCustomNumber2", long(null)),DeviceCustomNumber2)
  | summarize arg_max(TimeGenerated, *) by DeviceCustomNumber2, AdditionalExtensions, TimeGenerated
  | extend Category = extract(@'cat=([^;]+)(\;|$)', 1, AdditionalExtensions), HasForensics = extract(@'cs7=([^;]+)(\;|$)', 1, AdditionalExtensions)
  | extend Category = coalesce(column_ifexists("DeviceEventCategory",""),Category)	
  | where Category == "illusive:alerts"
  | extend IncidentId = DeviceCustomNumber2, IncidentURL = DeviceCustomString5
  | project TimeGenerated, SourceIP, SourceHostName,Computer , DeviceEventClassID ,HasForensics ,SourceUserName, Activity, DeviceAddress,  DestinationHostName, DestinationUserName, IncidentId, IncidentURL  
triggerThreshold: 0
customDetails:
  HasForensics: HasForensics
  Account: SourceUserName
  IllusiveIncidentId: IncidentId
alertDetailsOverride:
  alertDisplayNameFormat: |
        Illusive Incident: {{IncidentId}}
  alertDescriptionFormat: |
        Illusive Incident {{IncidentId}} generated at {{TimeGenerated}}
OriginalUri: https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/Illusive Platform/Analytic Rules/Illusive_Detection_Query.yaml
queryPeriod: 5m
name: Illusive Incidents Analytic Rule
status: Available
kind: Scheduled
description: |
    'Create a Microsoft Sentinel incident upon a new Illusive alert (incident) and associate all related Illusive events to the relevant Microsoft Sentinel alert. This is done by filtering and processing Illusive Syslog messages.'
id: 1a7dbcf6-21a2-4255-84b2-c8dbbdca4630
version: 1.0.5
eventGroupingSettings:
  aggregationKind: AlertPerResult
tactics:
- Persistence
- PrivilegeEscalation
- DefenseEvasion
- CredentialAccess
- LateralMovement
severity: Medium

ARM