Master PowerShell tricks (Volume 1) by Dave Kawula & Thomas Rayner & Sean Kearney & Allan Rafuse & Ed Wilson

Author:Dave Kawula & Thomas Rayner & Sean Kearney & Allan Rafuse & Ed Wilson [Kawula, Dave]
Language: eng
Format: epub
Published: 2016-12-17T23:00:00+00:00

Things to thing about

After running this script you’ll hopefully find and fix everything. Perhaps you may want to thinking about creating a script, run it as a scheduled task and centralize the results for further auditing.

The Code

$FromDate = (Get-Date).AddDays(-30)

$Content = Get-Content "\\$DomainController\c$\Windows\Debug\netlogon.log"

# Run through the netlogon.log (in reverse order, think about speed/performance) while the dates are greater than $FromDate

$MissingEntry = @{}

For ($counter = $Content.Count; $counter -ge 0; $counter--) {

If ($Content[$counter] -match "(\d\d)/(\d\d) (\d\d):(\d\d):(\d\d)") {

$EntryDate = Get-Date -Month $matches[1] -Day $matches[2] -Hour $Matches[3] -Minute $Matches[4] -Second $Matches[5]

if ($EntryDate -lt $FromDate) {

break

}

# Within the timeframe, let's save the IP and Date attempted in a hashtable. Only keep the first hit, which is the latest failed site attempt

$ip = $Content[$counter] -Replace ".* (.*)$", '$1'

If ($MissingEntry[$ip] -eq $null) {

$MissingEntry[$ip]= $EntryDate

}

}

}

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