TI Map URL Entity to PaloAlto Data

Original query, unchanged.

let dt_lookBack = 1h;
let ioc_lookBack = 14d;
ThreatIntelligenceIndicator
// Picking up only IOC's that contain the entities we want
| where isnotempty(Url)
| where TimeGenerated >= ago(ioc_lookBack)
| summarize LatestIndicatorTime = arg_max(TimeGenerated, *) by IndicatorId
| where Active == true and ExpirationDateTime > now()
// using innerunique to keep perf fast and result set low, we only need one match to indicate potential malicious activity that needs to be investigated
| join kind=innerunique (
  CommonSecurityLog
  | extend IngestionTime = ingestion_time()
  | where IngestionTime > ago(dt_lookBack)
  // Select on Palo Alto logs
  | where DeviceVendor =~ "Palo Alto Networks"
  | where DeviceEventClassID =~ 'url'
  //Uncomment the line below to only alert on allowed connections
  //| where DeviceAction !~ "block-url"
  //Select logs where URL data is populated
  | extend PA_Url = column_ifexists("RequestURL", "None")
  | extend PA_Url = iif(isempty(PA_Url), extract("([^\"]+)", 1, tolower(AdditionalExtensions)), trim('"', PA_Url))
  | extend PA_Url = iif(PA_Url !startswith "http://" and ApplicationProtocol !~ "ssl", strcat('http://', PA_Url), iif(PA_Url !startswith "https://" and ApplicationProtocol =~ "ssl", strcat('https://', PA_Url), PA_Url))
  | where isnotempty(PA_Url)
  | extend CommonSecurityLog_TimeGenerated = TimeGenerated
) on $left.Url == $right.PA_Url
| where CommonSecurityLog_TimeGenerated < ExpirationDateTime
| summarize CommonSecurityLog_TimeGenerated = arg_max(CommonSecurityLog_TimeGenerated, *) by IndicatorId, PA_Url
| project timestamp = CommonSecurityLog_TimeGenerated, Description, ActivityGroupNames, IndicatorId, ThreatType, ExpirationDateTime, ConfidenceScore, DeviceAction, SourceIP, PA_Url, DeviceName