This PowerShell code retrieves and processes Windows event log entries...

This PowerShell code retrieves and processes Windows event log entries from the Security log with a specific event ID. Here's a detailed breakdown of what it does:

1. Get-WinEvent -FilterHashtable @{LogName='Security'; ID=4624}:

   • This retrieves event log entries from the Security log in Windows Event Viewer where the event ID is 4624.
   • Event ID 4624 corresponds to a successful logon event in Windows systems (audit success for user logins).

2. | (Pipeline):

   • The results from Get-WinEvent are passed (via the pipeline) to the next command, Select-Object.

3. Select-Object TimeCreated, Id, @{Name='DetailedMessage'; Expression={$_.Message}}:

   • Select-Object is used to select specific properties of the retrieved event logs and rename/add custom properties:
     • TimeCreated: Date and time when the event was logged.
     • Id: The ID of the event (4624 in this case).
     • @{Name='DetailedMessage'; Expression={$_.Message}}: Creates a custom property named DetailedMessage that extracts the detailed event log message from the Message property of the event objects.

Output:

The code outputs a list of objects with three columns:

• TimeCreated: When the event occurred.
• Id: Event ID (4624).
• DetailedMessage: The full text of the message for each corresponding event.

This is typically used for auditing user logon activity on a system by inspecting these specific security logs.