TI map IP entity to GitHub_CL

let dt_lookBack = 1h; // Look back 1 hour for VMConnection events
let ioc_lookBack = 14d; // Look back 14 days for threat intelligence indicators
ThreatIntelIndicators
//extract key part of kv pair
     | extend IndicatorType = replace(@"\[|\]|\""", "", tostring(split(ObservableKey, ":", 0)))
     | where isnotempty(IndicatorType) and IndicatorType == "ipv4-addr"
     | extend NetworkSourceIP = toupper(ObservableValue)
     | extend TrafficLightProtocolLevel = tostring(parse_json(AdditionalFields).TLPLevel)
// Picking up only IOC's that contain the entities we want
| where 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(NetworkSourceIP), NetworkSourceIP, NetworkSourceIP)
| 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 Id
| where IsActive == true and ValidUntil > now()
  | project-reorder *, Tags, TrafficLightProtocolLevel, NetworkSourceIP, Type, TI_ipEntity
| join (
  GitHubAudit
  | where TimeGenerated >= ago(dt_lookBack)
  | extend GitHubAudit_TimeGenerated = TimeGenerated
)
on $left.TI_ipEntity == $right.IPaddress
| extend Description = tostring(parse_json(Data).description)
| extend ActivityGroupNames = extract(@"ActivityGroup:(\S+)", 1, tostring(parse_json(Data).labels))
| project LatestIndicatorTime, Description, ActivityGroupNames, Id, ValidUntil, Confidence, GitHubAudit_TimeGenerated, TI_ipEntity, IPaddress, Actor, Action, Country, OperationType, NetworkSourceIP//, NetworkIP, NetworkDestinationIP, EmailSourceIpAddress, ThreatType, Url,

OriginalUri: https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/Threat Intelligence (NEW)/Analytic Rules/Threat Intel Matches to GitHub Audit Logs.yaml
query: |
  let dt_lookBack = 1h; // Look back 1 hour for VMConnection events
  let ioc_lookBack = 14d; // Look back 14 days for threat intelligence indicators
  ThreatIntelIndicators
  //extract key part of kv pair
       | extend IndicatorType = replace(@"\[|\]|\""", "", tostring(split(ObservableKey, ":", 0)))
       | where isnotempty(IndicatorType) and IndicatorType == "ipv4-addr"
       | extend NetworkSourceIP = toupper(ObservableValue)
       | extend TrafficLightProtocolLevel = tostring(parse_json(AdditionalFields).TLPLevel)
  // Picking up only IOC's that contain the entities we want
  | where 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(NetworkSourceIP), NetworkSourceIP, NetworkSourceIP)
  | 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 Id
  | where IsActive == true and ValidUntil > now()
    | project-reorder *, Tags, TrafficLightProtocolLevel, NetworkSourceIP, Type, TI_ipEntity
  | join (
    GitHubAudit
    | where TimeGenerated >= ago(dt_lookBack)
    | extend GitHubAudit_TimeGenerated = TimeGenerated
  )
  on $left.TI_ipEntity == $right.IPaddress
  | extend Description = tostring(parse_json(Data).description)
  | extend ActivityGroupNames = extract(@"ActivityGroup:(\S+)", 1, tostring(parse_json(Data).labels))
  | project LatestIndicatorTime, Description, ActivityGroupNames, Id, ValidUntil, Confidence, GitHubAudit_TimeGenerated, TI_ipEntity, IPaddress, Actor, Action, Country, OperationType, NetworkSourceIP//, NetworkIP, NetworkDestinationIP, EmailSourceIpAddress, ThreatType, Url,  
description: |
    'Identifies a match in GitHub_CL table from any IP IOC from TI'
severity: Medium
requiredDataConnectors:
- dataTypes:
  - ThreatIntelligenceIndicator
  connectorId: ThreatIntelligence
- dataTypes:
  - ThreatIntelligenceIndicator
  connectorId: ThreatIntelligenceTaxii
- dataTypes:
  - ThreatIntelligenceIndicator
  connectorId: MicrosoftDefenderThreatIntelligence
name: TI map IP entity to GitHub_CL
triggerThreshold: 0
tactics:
- CommandAndControl
version: 1.0.5
relevantTechniques:
- T1071
triggerOperator: gt
entityMappings:
- entityType: Account
  fieldMappings:
  - columnName: Actor
    identifier: FullName
- entityType: IP
  fieldMappings:
  - columnName: IPaddress
    identifier: Address
id: 43d6c173-64c8-4416-b32e-636a9f318d15
kind: Scheduled
queryFrequency: 1h
queryPeriod: 14d

{
  "$schema": "https://schema.management.azure.com/schemas/2019-04-01/deploymentTemplate.json#",
  "contentVersion": "1.0.0.0",
  "parameters": {
    "workspace": {
      "type": "String"
    }
  },
  "resources": [
    {
      "apiVersion": "2024-01-01-preview",
      "id": "[concat(resourceId('Microsoft.OperationalInsights/workspaces/providers', parameters('workspace'), 'Microsoft.SecurityInsights'),'/alertRules/43d6c173-64c8-4416-b32e-636a9f318d15')]",
      "kind": "Scheduled",
      "name": "[concat(parameters('workspace'),'/Microsoft.SecurityInsights/43d6c173-64c8-4416-b32e-636a9f318d15')]",
      "properties": {
        "alertRuleTemplateName": "43d6c173-64c8-4416-b32e-636a9f318d15",
        "customDetails": null,
        "description": "'Identifies a match in GitHub_CL table from any IP IOC from TI'\n",
        "displayName": "TI map IP entity to GitHub_CL",
        "enabled": true,
        "entityMappings": [
          {
            "entityType": "Account",
            "fieldMappings": [
              {
                "columnName": "Actor",
                "identifier": "FullName"
              }
            ]
          },
          {
            "entityType": "IP",
            "fieldMappings": [
              {
                "columnName": "IPaddress",
                "identifier": "Address"
              }
            ]
          }
        ],
        "OriginalUri": "https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/Threat Intelligence (NEW)/Analytic Rules/Threat Intel Matches to GitHub Audit Logs.yaml",
        "query": "let dt_lookBack = 1h; // Look back 1 hour for VMConnection events\nlet ioc_lookBack = 14d; // Look back 14 days for threat intelligence indicators\nThreatIntelIndicators\n//extract key part of kv pair\n     | extend IndicatorType = replace(@\"\\[|\\]|\\\"\"\", \"\", tostring(split(ObservableKey, \":\", 0)))\n     | where isnotempty(IndicatorType) and IndicatorType == \"ipv4-addr\"\n     | extend NetworkSourceIP = toupper(ObservableValue)\n     | extend TrafficLightProtocolLevel = tostring(parse_json(AdditionalFields).TLPLevel)\n// Picking up only IOC's that contain the entities we want\n| where isnotempty(NetworkSourceIP)\n// | where Action == true\n| where TimeGenerated >= ago(ioc_lookBack)\n// Taking the first non-empty value based on potential IOC match availability\n| extend TI_ipEntity = iff(isnotempty(NetworkSourceIP), NetworkSourceIP, NetworkSourceIP)\n| extend TI_ipEntity = iff(isempty(TI_ipEntity) and isnotempty(NetworkSourceIP), NetworkSourceIP, TI_ipEntity)\n//| extend TI_ipEntity = iff(isempty(TI_ipEntity) and isnotempty(EmailSourceIpAddress), EmailSourceIpAddress, TI_ipEntity)\n| summarize LatestIndicatorTime = arg_max(TimeGenerated, *) by Id\n| where IsActive == true and ValidUntil > now()\n  | project-reorder *, Tags, TrafficLightProtocolLevel, NetworkSourceIP, Type, TI_ipEntity\n| join (\n  GitHubAudit\n  | where TimeGenerated >= ago(dt_lookBack)\n  | extend GitHubAudit_TimeGenerated = TimeGenerated\n)\non $left.TI_ipEntity == $right.IPaddress\n| extend Description = tostring(parse_json(Data).description)\n| extend ActivityGroupNames = extract(@\"ActivityGroup:(\\S+)\", 1, tostring(parse_json(Data).labels))\n| project LatestIndicatorTime, Description, ActivityGroupNames, Id, ValidUntil, Confidence, GitHubAudit_TimeGenerated, TI_ipEntity, IPaddress, Actor, Action, Country, OperationType, NetworkSourceIP//, NetworkIP, NetworkDestinationIP, EmailSourceIpAddress, ThreatType, Url,\n",
        "queryFrequency": "PT1H",
        "queryPeriod": "P14D",
        "severity": "Medium",
        "subTechniques": [],
        "suppressionDuration": "PT1H",
        "suppressionEnabled": false,
        "tactics": [
          "CommandAndControl"
        ],
        "techniques": [
          "T1071"
        ],
        "templateVersion": "1.0.5",
        "triggerOperator": "GreaterThan",
        "triggerThreshold": 0
      },
      "type": "Microsoft.OperationalInsights/workspaces/providers/alertRules"
    }
  ]
}