TI map IP entity to GitHub_CL

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Id	aac495a9-feb1-446d-b08e-a1164a539452
Rulename	TI map IP entity to GitHub_CL
Description	Identifies a match in GitHub_CL table from any IP IOC from TI
Severity	Medium
Tactics	CommandAndControl
Techniques	T1071
Required data connectors	MicrosoftDefenderThreatIntelligence ThreatIntelligence ThreatIntelligenceTaxii
Kind	Scheduled
Query frequency	1h
Query period	14d
Trigger threshold	0
Trigger operator	gt
Source Uri	https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/Threat Intelligence/Analytic Rules/Threat Intel Matches to GitHub Audit Logs.yaml
Version	1.0.5
Arm template	aac495a9-feb1-446d-b08e-a1164a539452.json

KQL

let dt_lookBack = 1h; // Look back 1 hour for VMConnection events
let ioc_lookBack = 14d; // Look back 14 days for threat intelligence indicators
ThreatIntelligenceIndicator
// Picking up only IOC's that contain the entities we want
| where isnotempty(NetworkIP) or isnotempty(EmailSourceIpAddress) or isnotempty(NetworkDestinationIP) or isnotempty(NetworkSourceIP)
| where Action == true
| where TimeGenerated >= ago(ioc_lookBack)
// Taking the first non-empty value based on potential IOC match availability
| extend TI_ipEntity = iff(isnotempty(NetworkIP), NetworkIP, NetworkDestinationIP)
| extend TI_ipEntity = iff(isempty(TI_ipEntity) and isnotempty(NetworkSourceIP), NetworkSourceIP, TI_ipEntity)
| extend TI_ipEntity = iff(isempty(TI_ipEntity) and isnotempty(EmailSourceIpAddress), EmailSourceIpAddress, TI_ipEntity)
| summarize LatestIndicatorTime = arg_max(TimeGenerated, *) by IndicatorId
| where Active == true and ExpirationDateTime > now()
| join (
  GitHubAudit
  | where TimeGenerated >= ago(dt_lookBack)
  | extend GitHubAudit_TimeGenerated = TimeGenerated
)
on $left.TI_ipEntity == $right.IPaddress
| project LatestIndicatorTime, Description, ActivityGroupNames, IndicatorId, ThreatType, Url, ExpirationDateTime, ConfidenceScore, GitHubAudit_TimeGenerated, TI_ipEntity, IPaddress, Actor, Action, Country, OperationType, NetworkIP, NetworkDestinationIP, NetworkSourceIP, EmailSourceIpAddress

YAML

queryPeriod: 14d
query: |
  let dt_lookBack = 1h; // Look back 1 hour for VMConnection events
  let ioc_lookBack = 14d; // Look back 14 days for threat intelligence indicators
  ThreatIntelligenceIndicator
  // Picking up only IOC's that contain the entities we want
  | where isnotempty(NetworkIP) or isnotempty(EmailSourceIpAddress) or isnotempty(NetworkDestinationIP) or isnotempty(NetworkSourceIP)
  | where Action == true
  | where TimeGenerated >= ago(ioc_lookBack)
  // Taking the first non-empty value based on potential IOC match availability
  | extend TI_ipEntity = iff(isnotempty(NetworkIP), NetworkIP, NetworkDestinationIP)
  | extend TI_ipEntity = iff(isempty(TI_ipEntity) and isnotempty(NetworkSourceIP), NetworkSourceIP, TI_ipEntity)
  | extend TI_ipEntity = iff(isempty(TI_ipEntity) and isnotempty(EmailSourceIpAddress), EmailSourceIpAddress, TI_ipEntity)
  | summarize LatestIndicatorTime = arg_max(TimeGenerated, *) by IndicatorId
  | where Active == true and ExpirationDateTime > now()
  | join (
    GitHubAudit
    | where TimeGenerated >= ago(dt_lookBack)
    | extend GitHubAudit_TimeGenerated = TimeGenerated
  )
  on $left.TI_ipEntity == $right.IPaddress
  | project LatestIndicatorTime, Description, ActivityGroupNames, IndicatorId, ThreatType, Url, ExpirationDateTime, ConfidenceScore, GitHubAudit_TimeGenerated, TI_ipEntity, IPaddress, Actor, Action, Country, OperationType, NetworkIP, NetworkDestinationIP, NetworkSourceIP, EmailSourceIpAddress  
name: TI map IP entity to GitHub_CL
entityMappings:
- fieldMappings:
  - columnName: Actor
    identifier: FullName
  entityType: Account
- fieldMappings:
  - columnName: IPaddress
    identifier: Address
  entityType: IP
OriginalUri: https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/Threat Intelligence/Analytic Rules/Threat Intel Matches to GitHub Audit Logs.yaml
requiredDataConnectors:
- connectorId: ThreatIntelligence
  dataTypes:
  - ThreatIntelligenceIndicator
- connectorId: ThreatIntelligenceTaxii
  dataTypes:
  - ThreatIntelligenceIndicator
- connectorId: MicrosoftDefenderThreatIntelligence
  dataTypes:
  - ThreatIntelligenceIndicator
description: |
    'Identifies a match in GitHub_CL table from any IP IOC from TI'
kind: Scheduled
version: 1.0.5
queryFrequency: 1h
severity: Medium
relevantTechniques:
- T1071
triggerOperator: gt
triggerThreshold: 0
tactics:
- CommandAndControl
id: aac495a9-feb1-446d-b08e-a1164a539452

ARM