Microsoft Sentinel Analytic Rules
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TI map IP entity to GitHub_CL

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Idaac495a9-feb1-446d-b08e-a1164a539452
RulenameTI map IP entity to GitHub_CL
DescriptionIdentifies a match in GitHub_CL table from any IP IOC from TI
SeverityMedium
TacticsImpact
Required data connectorsMicrosoftDefenderThreatIntelligence
ThreatIntelligence
ThreatIntelligenceTaxii
KindScheduled
Query frequency1h
Query period14d
Trigger threshold0
Trigger operatorgt
Source Urihttps://github.com/Azure/Azure-Sentinel/blob/master/Solutions/Threat Intelligence/Analytic Rules/Threat Intel Matches to GitHub Audit Logs.yaml
Version1.0.3
Arm templateaac495a9-feb1-446d-b08e-a1164a539452.json
Deploy To Azure
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
| extend timestamp = GitHubAudit_TimeGenerated, IPCustomEntity = IPaddress, AccountCustomEntity = Actor
name: TI map IP entity to GitHub_CL
triggerOperator: gt
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 == $right.IPaddress
  | project LatestIndicatorTime, Description, ActivityGroupNames, IndicatorId, ThreatType, Url, ExpirationDateTime, ConfidenceScore, GitHubAudit_TimeGenerated, TI_ipEntity, IPaddress, Actor, Action, Country, OperationType, NetworkIP, NetworkDestinationIP, NetworkSourceIP, EmailSourceIpAddress
  | extend timestamp = GitHubAudit_TimeGenerated, IPCustomEntity = IPaddress, AccountCustomEntity = Actor  
OriginalUri: https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/Threat Intelligence/Analytic Rules/Threat Intel Matches to GitHub Audit Logs.yaml
description: |
    'Identifies a match in GitHub_CL table from any IP IOC from TI'
triggerThreshold: 0
id: aac495a9-feb1-446d-b08e-a1164a539452
kind: Scheduled
severity: Medium
version: 1.0.3
entityMappings:
- fieldMappings:
  - identifier: FullName
    columnName: AccountCustomEntity
  entityType: Account
- fieldMappings:
  - identifier: Address
    columnName: IPCustomEntity
  entityType: IP
queryFrequency: 1h
queryPeriod: 14d
requiredDataConnectors:
- dataTypes:
  - ThreatIntelligenceIndicator
  connectorId: ThreatIntelligence
- dataTypes:
  - ThreatIntelligenceIndicator
  connectorId: ThreatIntelligenceTaxii
- dataTypes:
  - ThreatIntelligenceIndicator
  connectorId: MicrosoftDefenderThreatIntelligence
tactics:
- Impact
{
  "$schema": "https://schema.management.azure.com/schemas/2019-04-01/deploymentTemplate.json#",
  "contentVersion": "1.0.0.0",
  "parameters": {
    "workspace": {
      "type": "String"
    }
  },
  "resources": [
    {
      "apiVersion": "2023-02-01-preview",
      "id": "[concat(resourceId('Microsoft.OperationalInsights/workspaces/providers', parameters('workspace'), 'Microsoft.SecurityInsights'),'/alertRules/aac495a9-feb1-446d-b08e-a1164a539452')]",
      "kind": "Scheduled",
      "name": "[concat(parameters('workspace'),'/Microsoft.SecurityInsights/aac495a9-feb1-446d-b08e-a1164a539452')]",
      "properties": {
        "alertRuleTemplateName": "aac495a9-feb1-446d-b08e-a1164a539452",
        "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": "AccountCustomEntity",
                "identifier": "FullName"
              }
            ]
          },
          {
            "entityType": "IP",
            "fieldMappings": [
              {
                "columnName": "IPCustomEntity",
                "identifier": "Address"
              }
            ]
          }
        ],
        "OriginalUri": "https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/Threat Intelligence/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\nThreatIntelligenceIndicator\n// Picking up only IOC's that contain the entities we want\n| where isnotempty(NetworkIP) or isnotempty(EmailSourceIpAddress) or isnotempty(NetworkDestinationIP) or 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(NetworkIP), NetworkIP, NetworkDestinationIP)\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 IndicatorId\n| where Active == true and ExpirationDateTime > now()\n| join (\n  GitHubAudit\n  | where TimeGenerated >= ago(dt_lookBack)\n  | extend GitHubAudit_TimeGenerated = TimeGenerated\n)\non $left.TI_ipEntity == $right.IPaddress\n| project LatestIndicatorTime, Description, ActivityGroupNames, IndicatorId, ThreatType, Url, ExpirationDateTime, ConfidenceScore, GitHubAudit_TimeGenerated, TI_ipEntity, IPaddress, Actor, Action, Country, OperationType, NetworkIP, NetworkDestinationIP, NetworkSourceIP, EmailSourceIpAddress\n| extend timestamp = GitHubAudit_TimeGenerated, IPCustomEntity = IPaddress, AccountCustomEntity = Actor\n",
        "queryFrequency": "PT1H",
        "queryPeriod": "P14D",
        "severity": "Medium",
        "suppressionDuration": "PT1H",
        "suppressionEnabled": false,
        "tactics": [
          "Impact"
        ],
        "templateVersion": "1.0.3",
        "triggerOperator": "GreaterThan",
        "triggerThreshold": 0
      },
      "type": "Microsoft.OperationalInsights/workspaces/providers/alertRules"
    }
  ]
}