From 4f7c1072f7704113e7b795c2bc4c6779f1cac28a Mon Sep 17 00:00:00 2001
From: AdminDroid <49208841+admindroid-community@users.noreply.github.com>
Date: Wed, 14 May 2025 17:10:14 +0530
Subject: [PATCH] Audit Failed Sign-in Attempts in Entra

---
 .../GetEntraFailedSignIns.ps1                 | 233 ++++++++++++++++++
 1 file changed, 233 insertions(+)
 create mode 100644 Audit Failed Signin Attempts in Entra/GetEntraFailedSignIns.ps1

diff --git a/Audit Failed Signin Attempts in Entra/GetEntraFailedSignIns.ps1 b/Audit Failed Signin Attempts in Entra/GetEntraFailedSignIns.ps1
new file mode 100644
index 0000000..9af1455
--- /dev/null
+++ b/Audit Failed Signin Attempts in Entra/GetEntraFailedSignIns.ps1	
@@ -0,0 +1,233 @@
+<#
+=============================================================================================
+Name:           Export Microsoft 365 Sign-in Failure Report Using PowerShell 
+Version:        1.0
+Website:        o365reports.com
+
+~~~~~~~~~~~~~~~~~~
+Script Highlights:
+~~~~~~~~~~~~~~~~~~
+
+1. The script automatically verifies and installs the Microsoft Graph PowerShell SDK module (if not installed already) upon your confirmation. 
+2. Generates a report that retrieves all failed interactive sign-in attempts by default.
+3. Enables filtering of failed attempts from the following sign-in types.  
+    -> Non-interactive user sign-ins 
+    -> Service principal sign-ins 
+    -> Managed identity sign-ins
+    -> All type of sign-in failure events 
+4. Allows you to export a failed login attempts report for a custom period. 
+5. View sign-in failure events based on error code.  
+6. Helps export failed risky sign-ins alone. 
+7. Exports a report on guest users’ sign-in failures.
+8. Segments failed sign-in attempts based on MFA enforced & not enforced. 
+9. You can export the report to choose either All users or Specific user(s). 
+10. The script can be executed with an MFA-enabled account too. 
+11. Exports report results as a CSV file.
+12. The script is scheduler friendly.
+13. It can be executed with certificate-based authentication (CBA) too.
+
+
+For detailed script execution: https://o365reports.com/2025/05/13/export-microsoft-365-sign-in-failure-report-using-powershell/
+ 
+============================================================================================
+#>
+
+Param
+(
+    [nullable[datetime]]$StartDate, #Pass value as YYYY-MM-DD
+    [nullable[datetime]]$EndDate, #Pass value as YYYY-MM-DD
+    [nullable[int]]$ErrorCode=$null,
+    [ValidateSet( "NonInteractiveSignIns", "ServicePrincipalSignIns", "ManagedIdentitySignIns", "AllSignIns" )]
+    [string]$SignInEventType,
+    [switch]$RiskySignInsOnly,
+    [switch]$GuestUserSignInsOnly,
+    [switch]$MFASignInsOnly,
+    [switch]$NonMFASignInsOnly,
+    [switch]$CreateSession,
+    [string[]]$UserPrincipalName,
+    [string]$TenantId,
+    [string]$ClientId,
+    [string]$CertificateThumbprint
+)
+
+Function Connect_MgGraph
+{
+ #Check for module installation
+ $Module=Get-Module -Name microsoft.graph.beta.reports -ListAvailable
+ if($Module.count -eq 0) 
+ { 
+  Write-Host Microsoft Graph Beta PowerShell SDK is not available  -ForegroundColor yellow  
+  $Confirm= Read-Host Are you sure you want to install module? [Y] Yes [N] No 
+  if($Confirm -match "[yY]") 
+  { 
+   Write-host "Installing Microsoft Graph Beta PowerShell module..."
+   Install-Module Microsoft.Graph.beta.reports -Repository PSGallery -Scope CurrentUser -AllowClobber -Force
+  }
+  else
+  {
+   Write-Host "Microsoft Graph Beta PowerShell module is required to run this script. Please install module using Install-Module Microsoft.Graph.beta.reports cmdlet." 
+   Exit
+  }
+ }
+ #Disconnect Existing MgGraph session
+ if($CreateSession.IsPresent)
+ {
+  Disconnect-MgGraph
+ }
+
+ Write-Host Connecting to Microsoft Graph...
+ if(($TenantId -ne "") -and ($ClientId -ne "") -and ($CertificateThumbprint -ne ""))  
+ {  
+  Connect-MgGraph  -TenantId $TenantId -AppId $ClientId -CertificateThumbprint $CertificateThumbprint -NoWelcome
+ }
+ else
+ {
+  Connect-MgGraph -Scopes "AuditLog.Read.All", "Policy.Read.ConditionalAccess" -NoWelcome
+ }
+}
+Connect_MgGraph
+
+$Location = Get-Location
+$CurrentDate = Get-Date
+$ExportCSV = "$Location\M365Users_Failed_SignIn_Report$((Get-Date -format yyyy-MMM-dd-ddd` hh-mm-ss` tt).ToString()).csv"
+$ExportResult =""   
+$ExportResults = @() 
+$SignInFilter = $Filter = $null
+
+if ($StartDate -ne $null) {
+    $ThresholdDate = ($CurrentDate).AddDays(-30)
+    if ($StartDate -lt $ThresholdDate) {
+        Write-Host "Error: The StartDate cannot be earlier than $($ThresholdDate.ToString('yyyy-MM-dd'))." -ForegroundColor Red
+        Exit
+    } else {
+        $SignInFilter += " and (createdDateTime ge $($StartDate.ToString('yyyy-MM-dd')))"
+    }
+} 
+
+if ($EndDate -ne $null) {
+    $SignInFilter += " and (createdDateTime le $($EndDate.AddDays(1).ToString("yyyy-MM-dd")))"
+} 
+
+if ($GuestUserSignInsOnly.IsPresent) {
+    $SignInFilter += " and (UserType eq 'guest')"
+} 
+
+switch ($SignInEventType) {
+    #"InteractiveSignIns" { $SignInFilter += " and (signInEventTypes/any(t: t eq 'interactiveUser'))" }
+    "NonInteractiveSignIns" { $SignInFilter += " and (signInEventTypes/any(t: t eq 'noninteractiveUser'))" }
+    "ServicePrincipalSignIns" { $SignInFilter += " and (signInEventTypes/any(t: t eq 'servicePrincipal'))" }
+    "ManagedIdentitySignIns" { $SignInFilter += " and (signInEventTypes/any(t: t eq 'managedIdentity'))" }
+    "AllSignIns" { $SignInFilter += " and ((signInEventTypes/any(t: t eq 'interactiveUser')) or (signInEventTypes/any(t: t eq 'nonInteractiveUser')) or (signInEventTypes/any(t: t eq 'servicePrincipal')) or (signInEventTypes/any(t: t eq 'managedIdentity')))" }
+} 
+
+if ($NonMFASignInsOnly.IsPresent) {
+    $SignInFilter += " and (authenticationRequirement eq 'singleFactorAuthentication')"
+}
+if ($MFASignInsOnly.IsPresent) {
+    $SignInFilter += " and (authenticationRequirement eq 'multiFactorAuthentication')"    
+}
+
+if (!([string]::IsNullOrEmpty($ErrorCode))) { 
+    $Filter = "(Status/Errorcode eq $($ErrorCode)) $($SignInFilter)"
+} else {
+    $Filter = "(Status/Errorcode ne 0) $($SignInFilter)"
+}
+
+$Count=0
+$PrintedLogs=0
+#retrieve signin activities
+Write-Host "Generating M365 users' failed signin report..."
+Get-MgBetaAuditLogSignIn -All -Filter "$($Filter)" | ForEach-Object {
+ $Count++
+ $UPN=$_.UserPrincipalName
+ Write-Progress -Activity "`n     Processed sign-in record: $count"
+ $CreatedDate=$_.CreatedDateTime
+ $Id=$_.Id
+ $UserDisplayName=$_.UserDisplayName
+ $UPN=$_.UserPrincipalName
+ $Authentication=$_.AuthenticationRequirement
+ $Location="$($_.Location.City), $($_.Location.State), $($_.Location.CountryOrRegion)"
+ $DeviceName=$_.DeviceDetail.DisplayName
+ $Browser=$_.DeviceDetail.Browser
+ $OperatingSystem=$_.DeviceDetail.OperatingSystem
+ $IpAddress=$_.IpAddress
+ $FlaggedForReview = $_.FlaggedForReview
+ $SignInErrorCode=$_.Status.ErrorCode
+ $FailureReason=$_.Status.FailureReason
+ $AdditionalDetails = $_.Status.AdditionalDetails
+ $UserType=$_.UserType
+ $IsInteractive=$_.IsInteractive
+ $RiskDetail=$_.RiskDetail
+ $RiskState=$_.RiskState
+ $AppDispalyName=$_.AppDisplayName
+ $ResourceDisplayName=$_.ResourceDisplayName
+ $ConditionalAccessPolicyStatus=$_.ConditionalAccessStatus
+ $AppliedConditionalAccessPolicies=$_.AppliedConditionalAccessPolicies
+ 
+
+ $AppliedPolicies = @()
+ $AppliedConditionalAccessPolicies | ForEach-Object {
+    if($_.Result -eq 'success' -or $_.Result -eq 'failure'){
+        $AppliedPolicies += $_.DisplayName
+    }
+ }
+
+ if($AppliedPolicies.Count -eq 0){
+ $AppliedPolicies = "None"
+ } else{
+ $AppliedPolicies = $AppliedPolicies -join ", "
+ }
+
+ if($SignInErrorCode -ne 0) { $Status='Failed' }
+
+ if($FailureReason -eq 'Other.') {
+   $FailureReason="Others"
+ }
+
+ #Declaring Print flag for all sign-ins 
+ $Print=1
+
+ #Filter for risky sign-ins
+ if(($RiskySignInsOnly.IsPresent) -and ($RiskDetail -eq 'none'))
+ {
+   $Print=0
+ }
+
+ #Filter for specific user sign-ins
+ if(($UserPrincipalName -ne $null) -and ($UserPrincipalName -notcontains $UPN))
+ {
+   $Print=0
+ }
+
+
+  #Export users to output file
+ if($Print -eq 1)
+ {
+  $PrintedLogs++
+  $ExportResult=[PSCustomObject]@{'Signin Date'=$CreatedDate; 'UPN'=$UPN; 'User Name'=$UserDisplayName; 'Application Name'=$AppDispalyName; 'Resource Name'=$ResourceDisplayName; 'Status'=$Status; 'Error Code'=$SignInErrorCode; 'Failure Reason'=$FailureReason; 'User type'=$UserType; 'Ip Address'=$IpAddress; 'Location'=$Location; 'Device Name'=$DeviceName; 'Browser'=$Browser; 'Operating System'=$OperatingSystem; 'Authentication Requirement'=$Authentication; 'Conditional access status'=$ConditionalAccessPolicyStatus;  'Applied Conditional Access Policies'=$AppliedPolicies; 'Risk detail'=$RiskDetail; 'Risk state'=$RiskState; 'SigninId'=$Id; 'Flagged For Review'=$FlaggedForReview; 'IsInteractive'=$IsInteractive; 'AdditionalDetails'=$AdditionalDetails;}
+  $ExportResult | Export-Csv -Path $ExportCSV -Notype -Append
+ }
+}
+
+#Disconnect the session after execution
+Disconnect-MgGraph | Out-Null
+
+Write-Host `n~~ Script prepared by AdminDroid Community ~~`n -ForegroundColor Green
+Write-Host "~~ Check out " -NoNewline -ForegroundColor Green; Write-Host "admindroid.com" -ForegroundColor Yellow -NoNewline; Write-Host " to get access to 1800+ Microsoft 365 reports. ~~" -ForegroundColor Green `n
+
+#Open output file after execution
+if((Test-Path -Path $ExportCSV) -eq "True")
+{   
+    Write-Host " The Output file availble in: " -NoNewline -ForegroundColor Yellow; Write-Host "$ExportCSV" `n 
+    Write-Host " Exported report has $PrintedLogs failed signin activities." 
+    $Prompt = New-Object -ComObject wscript.shell
+    $UserInput = $Prompt.popup("Do you want to open output file?",` 0,"Open Output File",4)
+    if ($UserInput -eq 6)
+    {
+        Invoke-Item "$ExportCSV"
+    }
+}
+else
+{
+    Write-Host "No logs found" 
+}
\ No newline at end of file