Suspicious application consent for offline access

Original query, unchanged.

let detectionTime = 1d;
let joinLookback = 14d;
AuditLogs
| where TimeGenerated > ago(detectionTime)
| where LoggedByService =~ "Core Directory"
| where Category =~ "ApplicationManagement"
| where OperationName =~ "Consent to application"
| where TargetResources has "offline"
| mv-apply TargetResource=TargetResources on 
  (
      where TargetResource.type =~ "ServicePrincipal"
      | extend ModifiedProperties = TargetResource.modifiedProperties,
               AppDisplayName = tostring(TargetResource.displayName),
               AppClientId = tolower(tostring(TargetResource.id))
  )
| where AppClientId !in ((externaldata(knownAppClientId:string, knownAppDisplayName:string)[@"https://raw.githubusercontent.com/Azure/Azure-Sentinel/master/Sample%20Data/Feeds/Microsoft.OAuth.KnownApplications.csv"] with (format="csv")))
| mv-apply Properties=ModifiedProperties on 
  (
      where Properties.displayName =~ "ConsentAction.Permissions"
      | extend ConsentFull = tostring(Properties.newValue)
      | extend ConsentFull = trim(@'"',tostring(ConsentFull))
  )
| parse ConsentFull with * "ConsentType: " GrantConsentType ", Scope: " GrantScope1 "]" *
| where ConsentFull has "offline_access" and ConsentFull has_any ("Files.Read", "Mail.Read", "Notes.Read", "ChannelMessage.Read", "Chat.Read", "TeamsActivity.Read", "Group.Read", "EWS.AccessAsUser.All", "EAS.AccessAsUser.All")
| where GrantConsentType != "AllPrincipals" // NOTE: we are ignoring if OAuth application was granted to all users via an admin - but admin due diligence should be audited occasionally
| extend GrantInitiatedByAppName = tostring(InitiatedBy.app.displayName)
| extend GrantInitiatedByAppServicePrincipalId = tostring(InitiatedBy.app.servicePrincipalId)
| extend GrantInitiatedByUserPrincipalName = tostring(InitiatedBy.user.userPrincipalName)
| extend GrantInitiatedByAadUserId = tostring(InitiatedBy.user.id)
| extend GrantIpAddress = iff(isnotempty(InitiatedBy.user.ipAddress), tostring(InitiatedBy.user.ipAddress), tostring(InitiatedBy.app.ipAddress))
| extend GrantInitiatedBy = iff(isnotempty(GrantInitiatedByUserPrincipalName), GrantInitiatedByUserPrincipalName, GrantInitiatedByAppName)
| extend GrantUserAgent = tostring(iff(AdditionalDetails[0].key =~ "User-Agent", AdditionalDetails[0].value, ""))
| project TimeGenerated, GrantConsentType, GrantScope1, GrantInitiatedBy, AppDisplayName, GrantInitiatedByUserPrincipalName, GrantInitiatedByAadUserId, GrantInitiatedByAppName, GrantInitiatedByAppServicePrincipalId, GrantIpAddress, GrantUserAgent, AppClientId, OperationName, ConsentFull, CorrelationId
| join kind = leftouter (AuditLogs
| where TimeGenerated > ago(joinLookback)
| where LoggedByService =~ "Core Directory"
| where Category =~ "ApplicationManagement"
| where OperationName =~ "Add service principal"
| mv-apply TargetResource=TargetResources on 
  (
      where TargetResource.type =~ "ServicePrincipal"
      | extend ModifiedProperties = TargetResource.modifiedProperties,
               AppClientId = tolower(TargetResource.id)
  )
| mv-apply ModifiedProperties=TargetResource.modifiedProperties on 
   (
      where ModifiedProperties.displayName =~ "AppAddress" and ModifiedProperties.newValue has "AddressType"
      | extend AppReplyURLs = ModifiedProperties.newValue
   )
 | distinct AppClientId, tostring(AppReplyURLs)
)
on AppClientId
| join kind = innerunique (AuditLogs
| where TimeGenerated > ago(joinLookback)
| where LoggedByService =~ "Core Directory"
| where Category =~ "ApplicationManagement"
| where OperationName =~ "Add OAuth2PermissionGrant" or OperationName =~ "Add delegated permission grant"
 | mv-apply TargetResource=TargetResources on 
  (
      where TargetResource.type =~ "ServicePrincipal" and array_length(TargetResource.modifiedProperties) > 0 and isnotnull(TargetResource.displayName)
      | extend GrantAuthentication = tostring(TargetResource.displayName)
  )
| extend GrantOperation = OperationName
| project GrantAuthentication, GrantOperation, CorrelationId
) on CorrelationId
| project TimeGenerated, GrantConsentType, GrantScope1, GrantInitiatedBy, AppDisplayName, AppReplyURLs, GrantInitiatedByUserPrincipalName, GrantInitiatedByAadUserId, GrantInitiatedByAppName, GrantInitiatedByAppServicePrincipalId, GrantIpAddress, GrantUserAgent, AppClientId, GrantAuthentication, OperationName, GrantOperation, CorrelationId, ConsentFull
| extend Name = tostring(split(GrantInitiatedByUserPrincipalName,'@',0)[0]), UPNSuffix = tostring(split(GrantInitiatedByUserPrincipalName,'@',1)[0])