Lumen TI IPAddress in SecurityEvents

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Id	140a2cb5-4b4a-485c-aab3-2415c24d37e6
Rulename	Lumen TI IPAddress in SecurityEvents
Description	This query maps Lumen IP indicators of compromise (IOCs) from threat intelligence (TI), by searching for matches in SecurityEvents.
Severity	Medium
Tactics	CommandAndControl
Techniques	T1071
Required data connectors	LumenThreatFeedConnector SecurityEvents ThreatIntelligenceUploadIndicatorsAPI WindowsSecurityEvents
Kind	Scheduled
Query frequency	4h
Query period	14d
Trigger threshold	0
Trigger operator	gt
Source Uri	https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/Lumen Defender Threat Feed/Analytic Rules/Lumen_IPEntity_SecurityEvent.yaml
Version	1.0.0
Arm template	140a2cb5-4b4a-485c-aab3-2415c24d37e6.json

KQL

let dt_lookBack = 1d;  // Data lookback for SecurityEvent
let ioc_lookBack = 14d; // TI lookback
let IP_Indicators = ThreatIntelIndicators
  | where TimeGenerated >= ago(ioc_lookBack)
  | where IsActive == true and ValidUntil > now()
  | summarize LatestIndicatorTime = arg_max(TimeGenerated, *) by Id
  | where SourceSystem == 'Lumen'
  | where ObservableKey == 'ipv4-addr:value'
  | extend TI_ipEntity = ObservableValue
  | where ipv4_is_private(TI_ipEntity) == false and TI_ipEntity !startswith 'fe80' and TI_ipEntity !startswith '::' and TI_ipEntity !startswith '127.';
IP_Indicators
| join kind=innerunique (
    SecurityEvent
    | where TimeGenerated >= ago(dt_lookBack)
    | extend SE_ipEntity = IpAddress
    | extend SecurityEvent_TimeGenerated = TimeGenerated
  ) on $left.TI_ipEntity == $right.SE_ipEntity
| where SecurityEvent_TimeGenerated < ValidUntil
| summarize arg_max(SecurityEvent_TimeGenerated, *), StartTime = min(SecurityEvent_TimeGenerated), EndTime = max(SecurityEvent_TimeGenerated) by Id, SE_ipEntity
| project timestamp = EndTime, StartTime, EndTime, Computer, IpAddress, EventID, Activity, Id, Tags, ValidUntil, Confidence, TI_ipEntity, SE_ipEntity, Type

YAML

suppressionEnabled: true
description: |
    This query maps Lumen IP indicators of compromise (IOCs) from threat intelligence (TI), by searching for matches in SecurityEvents.
displayName: Lumen TI IPAddress in SecurityEvents
tactics:
- CommandAndControl
requiredDataConnectors:
- connectorId: LumenThreatFeedConnector
  dataTypes:
  - ThreatIntelligenceIndicator
- connectorId: ThreatIntelligenceUploadIndicatorsAPI
  dataTypes:
  - ThreatIntelligenceIndicator
- connectorId: SecurityEvents
  dataTypes:
  - SecurityEvent
- connectorId: WindowsSecurityEvents
  dataTypes:
  - SecurityEvent
OriginalUri: https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/Lumen Defender Threat Feed/Analytic Rules/Lumen_IPEntity_SecurityEvent.yaml
severity: Medium
name: Lumen TI IPAddress in SecurityEvents
suppressionDuration: 5h
triggerThreshold: 0
queryPeriod: 14d
query: |
  let dt_lookBack = 1d;  // Data lookback for SecurityEvent
  let ioc_lookBack = 14d; // TI lookback
  let IP_Indicators = ThreatIntelIndicators
    | where TimeGenerated >= ago(ioc_lookBack)
    | where IsActive == true and ValidUntil > now()
    | summarize LatestIndicatorTime = arg_max(TimeGenerated, *) by Id
    | where SourceSystem == 'Lumen'
    | where ObservableKey == 'ipv4-addr:value'
    | extend TI_ipEntity = ObservableValue
    | where ipv4_is_private(TI_ipEntity) == false and TI_ipEntity !startswith 'fe80' and TI_ipEntity !startswith '::' and TI_ipEntity !startswith '127.';
  IP_Indicators
  | join kind=innerunique (
      SecurityEvent
      | where TimeGenerated >= ago(dt_lookBack)
      | extend SE_ipEntity = IpAddress
      | extend SecurityEvent_TimeGenerated = TimeGenerated
    ) on $left.TI_ipEntity == $right.SE_ipEntity
  | where SecurityEvent_TimeGenerated < ValidUntil
  | summarize arg_max(SecurityEvent_TimeGenerated, *), StartTime = min(SecurityEvent_TimeGenerated), EndTime = max(SecurityEvent_TimeGenerated) by Id, SE_ipEntity
  | project timestamp = EndTime, StartTime, EndTime, Computer, IpAddress, EventID, Activity, Id, Tags, ValidUntil, Confidence, TI_ipEntity, SE_ipEntity, Type  
relevantTechniques:
- T1071
id: 140a2cb5-4b4a-485c-aab3-2415c24d37e6
queryFrequency: 4h
entityMappings:
- entityType: IP
  fieldMappings:
  - columnName: SE_ipEntity
    identifier: Address
triggerOperator: gt
version: 1.0.0
kind: Scheduled

ARM