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Get-LastInteractiveUserLogons.ps1
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<#
.SYNOPSIS
Findet die letzten interaktiven Anmeldungen und RDP-Sitzungen der letzten
90 Tage.
.DESCRIPTION
Wertet Event 4624 im Sicherheitsprotokoll aus und behaelt nur die
Anmeldetypen 2 (lokal an der Konsole) und 10 (RemoteDesktop). Damit
faellt der ganze Rest weg - Dienst-, Netzwerk- und Batch-Anmeldungen, die
den Grossteil der Eintraege ausmachen.
Beantwortet die Frage, wer zuletzt tatsaechlich an einem Rechner
gearbeitet hat.
.NOTES
Liest maximal 10000 Events. Auf stark genutzten Systemen reicht das
unter Umstaenden nicht ueber die vollen 90 Tage zurueck - das Ergebnis
ist dann unvollstaendig, ohne dass es auffaellt.
#>
function Get-LastInteractiveLogons {
$cutoffDate = (Get-Date).AddDays(-90)
$logons = Get-WinEvent -LogName Security -FilterXPath "*[System[(EventID=4624)]]" -MaxEvents 10000 -EA SilentlyContinue |
Where-Object {
$_.TimeCreated -ge $cutoffDate
} | Where-Object {
$logonType = $_.Properties[8].Value
$logonType -eq 2 -or $logonType -eq 10
} | ForEach-Object {
[PSCustomObject]@{
Time = $_.TimeCreated
User = $_.Properties[5].Value
LogonType = $_.Properties[8].Value
AllProperties = $_.Properties
}
}
$logons | Group-Object User | ForEach-Object {
$_.Group | Sort-Object Time -Descending | Select-Object -First 1
} | Sort-Object Time
}
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