TI map IP entity to WorkdayASimAuditEventLogs

let dtLookBack = 1h; // Define the lookback period for audit events
let ioc_lookBack = 14d; // Define the lookback period for threat intelligence indicators
ThreatIntelligenceIndicator 
| where TimeGenerated >= ago(ioc_lookBack) // Filter threat intelligence indicators within the lookback period
| where isnotempty(NetworkIP)
      or isnotempty(EmailSourceIpAddress)
      or isnotempty(NetworkDestinationIP)
      or isnotempty(NetworkSourceIP) // Filter for indicators with relevant IP fields
| summarize LatestIndicatorTime = arg_max(TimeGenerated, *) by IndicatorId // Get the latest indicator time for each IndicatorId
  | extend TI_ipEntity = coalesce(NetworkIP, NetworkDestinationIP, NetworkSourceIP, EmailSourceIpAddress) // Combine IP fields into a single entity
  | where Active == true and ExpirationDateTime > now() // Filter for active indicators that have not expired
  | join kind=inner (
      ASimAuditEventLogs
      | where EventVendor == "Workday" // Filter for Workday events
      | where TimeGenerated >= ago(dtLookBack) // Filter events within the lookback period
      | where isnotempty(DvcIpAddr) // Filter for events with a device IP address
      | extend WD_TimeGenerated = EventStartTime // Rename the event start time column
      | project WD_TimeGenerated, ActorUsername, DvcIpAddr, Operation, Object // Select relevant columns
      )
      on $left.TI_ipEntity == $right.DvcIpAddr // Join on the IP entity
  | project
      LatestIndicatorTime,
      Description,
      ActivityGroupNames,
      IndicatorId,
      ThreatType,
      Url,
      ExpirationDateTime,
      ConfidenceScore,
      WD_TimeGenerated,
      ActorUsername,
      DvcIpAddr,
      Operation,
      Object // Select relevant columns after the join
  | extend
      timestamp = WD_TimeGenerated,
      Name = tostring(split(ActorUsername, '@', 0)),
      UPNSuffix = tostring(split(ActorUsername, '@', 1)) // Add additional fields for timestamp, name, and UPN suffix    

description: |
    Detects a match in Workday activity from any IP Indicator of Compromise (IOC) provided by Threat Intelligence (TI).
version: 1.0.0
entityMappings:
- entityType: Account
  fieldMappings:
  - columnName: ActorUsername
    identifier: FullName
  - columnName: Name
    identifier: Name
  - columnName: UPNSuffix
    identifier: UPNSuffix
- entityType: IP
  fieldMappings:
  - columnName: DvcIpAddr
    identifier: Address
queryFrequency: 1h
triggerThreshold: 0
query: |
  let dtLookBack = 1h; // Define the lookback period for audit events
  let ioc_lookBack = 14d; // Define the lookback period for threat intelligence indicators
  ThreatIntelligenceIndicator 
  | where TimeGenerated >= ago(ioc_lookBack) // Filter threat intelligence indicators within the lookback period
  | where isnotempty(NetworkIP)
        or isnotempty(EmailSourceIpAddress)
        or isnotempty(NetworkDestinationIP)
        or isnotempty(NetworkSourceIP) // Filter for indicators with relevant IP fields
  | summarize LatestIndicatorTime = arg_max(TimeGenerated, *) by IndicatorId // Get the latest indicator time for each IndicatorId
    | extend TI_ipEntity = coalesce(NetworkIP, NetworkDestinationIP, NetworkSourceIP, EmailSourceIpAddress) // Combine IP fields into a single entity
    | where Active == true and ExpirationDateTime > now() // Filter for active indicators that have not expired
    | join kind=inner (
        ASimAuditEventLogs
        | where EventVendor == "Workday" // Filter for Workday events
        | where TimeGenerated >= ago(dtLookBack) // Filter events within the lookback period
        | where isnotempty(DvcIpAddr) // Filter for events with a device IP address
        | extend WD_TimeGenerated = EventStartTime // Rename the event start time column
        | project WD_TimeGenerated, ActorUsername, DvcIpAddr, Operation, Object // Select relevant columns
        )
        on $left.TI_ipEntity == $right.DvcIpAddr // Join on the IP entity
    | project
        LatestIndicatorTime,
        Description,
        ActivityGroupNames,
        IndicatorId,
        ThreatType,
        Url,
        ExpirationDateTime,
        ConfidenceScore,
        WD_TimeGenerated,
        ActorUsername,
        DvcIpAddr,
        Operation,
        Object // Select relevant columns after the join
    | extend
        timestamp = WD_TimeGenerated,
        Name = tostring(split(ActorUsername, '@', 0)),
        UPNSuffix = tostring(split(ActorUsername, '@', 1)) // Add additional fields for timestamp, name, and UPN suffix      
severity: Medium
triggerOperator: gt
OriginalUri: https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/Threat Intelligence/Analytic Rules/IPEntity_Workday.yaml
queryPeriod: 14d
id: a924d317-03d2-4420-a71f-4d347bda4bd8
name: TI map IP entity to Workday(ASimAuditEventLogs)
kind: Scheduled
requiredDataConnectors:
- connectorId: ThreatIntelligence
  dataTypes:
  - ThreatIntelligenceIndicator
- connectorId: ThreatIntelligenceTaxii
  dataTypes:
  - ThreatIntelligenceIndicator
- connectorId: Workday
  dataTypes:
  - Workday
- connectorId: MicrosoftDefenderThreatIntelligence
  dataTypes:
  - ThreatIntelligenceIndicator
tactics:
- CommandAndControl
relevantTechniques:
- T1071

{
  "$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/a924d317-03d2-4420-a71f-4d347bda4bd8')]",
      "kind": "Scheduled",
      "name": "[concat(parameters('workspace'),'/Microsoft.SecurityInsights/a924d317-03d2-4420-a71f-4d347bda4bd8')]",
      "properties": {
        "alertRuleTemplateName": "a924d317-03d2-4420-a71f-4d347bda4bd8",
        "customDetails": null,
        "description": "Detects a match in Workday activity from any IP Indicator of Compromise (IOC) provided by Threat Intelligence (TI).\n",
        "displayName": "TI map IP entity to Workday(ASimAuditEventLogs)",
        "enabled": true,
        "entityMappings": [
          {
            "entityType": "Account",
            "fieldMappings": [
              {
                "columnName": "ActorUsername",
                "identifier": "FullName"
              },
              {
                "columnName": "Name",
                "identifier": "Name"
              },
              {
                "columnName": "UPNSuffix",
                "identifier": "UPNSuffix"
              }
            ]
          },
          {
            "entityType": "IP",
            "fieldMappings": [
              {
                "columnName": "DvcIpAddr",
                "identifier": "Address"
              }
            ]
          }
        ],
        "OriginalUri": "https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/Threat Intelligence/Analytic Rules/IPEntity_Workday.yaml",
        "query": "let dtLookBack = 1h; // Define the lookback period for audit events\nlet ioc_lookBack = 14d; // Define the lookback period for threat intelligence indicators\nThreatIntelligenceIndicator \n| where TimeGenerated >= ago(ioc_lookBack) // Filter threat intelligence indicators within the lookback period\n| where isnotempty(NetworkIP)\n      or isnotempty(EmailSourceIpAddress)\n      or isnotempty(NetworkDestinationIP)\n      or isnotempty(NetworkSourceIP) // Filter for indicators with relevant IP fields\n| summarize LatestIndicatorTime = arg_max(TimeGenerated, *) by IndicatorId // Get the latest indicator time for each IndicatorId\n  | extend TI_ipEntity = coalesce(NetworkIP, NetworkDestinationIP, NetworkSourceIP, EmailSourceIpAddress) // Combine IP fields into a single entity\n  | where Active == true and ExpirationDateTime > now() // Filter for active indicators that have not expired\n  | join kind=inner (\n      ASimAuditEventLogs\n      | where EventVendor == \"Workday\" // Filter for Workday events\n      | where TimeGenerated >= ago(dtLookBack) // Filter events within the lookback period\n      | where isnotempty(DvcIpAddr) // Filter for events with a device IP address\n      | extend WD_TimeGenerated = EventStartTime // Rename the event start time column\n      | project WD_TimeGenerated, ActorUsername, DvcIpAddr, Operation, Object // Select relevant columns\n      )\n      on $left.TI_ipEntity == $right.DvcIpAddr // Join on the IP entity\n  | project\n      LatestIndicatorTime,\n      Description,\n      ActivityGroupNames,\n      IndicatorId,\n      ThreatType,\n      Url,\n      ExpirationDateTime,\n      ConfidenceScore,\n      WD_TimeGenerated,\n      ActorUsername,\n      DvcIpAddr,\n      Operation,\n      Object // Select relevant columns after the join\n  | extend\n      timestamp = WD_TimeGenerated,\n      Name = tostring(split(ActorUsername, '@', 0)),\n      UPNSuffix = tostring(split(ActorUsername, '@', 1)) // Add additional fields for timestamp, name, and UPN suffix    \n",
        "queryFrequency": "PT1H",
        "queryPeriod": "P14D",
        "severity": "Medium",
        "subTechniques": [],
        "suppressionDuration": "PT1H",
        "suppressionEnabled": false,
        "tactics": [
          "CommandAndControl"
        ],
        "techniques": [
          "T1071"
        ],
        "templateVersion": "1.0.0",
        "triggerOperator": "GreaterThan",
        "triggerThreshold": 0
      },
      "type": "Microsoft.OperationalInsights/workspaces/providers/alertRules"
    }
  ]
}