PowerShell Script for Monitoring User Logon Events

Security & AuditingJanuary 12, 2025

In this post, we will create a PowerShell script that monitors user logon events on a Windows system. This script is useful for security professionals looking to track who is accessing their systems and when. It will utilize the Get-WinEvent cmdlet to fetch logon-related events from the Windows Event Log.

powershell

$logName = 'Security'
$eventId = 4624

$logonEvents = Get-WinEvent -LogName $logName -Id $eventId | Select-Object TimeCreated, Message

$logonEvents | ForEach-Object {
    Write-Host "Logon Time: $($_.TimeCreated) - Event Message: $($_.Message)"
}

$userName = 'UserAccount' # Replace with the desired user account
$filteredEvents = $logonEvents | Where-Object { $_.Message -like "*$userName*" }
$filteredEvents | ForEach-Object {
    Write-Host "Filtered Logon Time: $($_.TimeCreated) - Event Message: $($_.Message)"
}

Run it across your fleet

This script runs as-is on a single host. Paste it into ServerEngine to schedule it, run it on a whole server group in parallel, and keep the credentials out of the file — see the scripts documentation and the credential store.

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PowerShell Script for Monitoring User Logon Events

Run it across your fleet

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Ready when you are.