Create Get-PSADForestKRBTGTInfo

This function discovers all of the KRBTGT accounts in the forest using ADSI and returns the account info, specifically the last password change.

Get-PSADForestKRBTGTInfo

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+function Get-PSADForestKRBTGTInfo
+{
+
+<#
+.SYNOPSIS
+This function discovers all of the KRBTGT accounts in the forest and returns the account info.
+
+Get-PSADForestKRBTGTInfo
+Author: Sean Metcalf, Twitter: @PyroTek3
+License: BSD 3-Clause
+Required Dependencies: None
+Optional Dependencies: None
+
+Last Updated: 11/10/2014
+Version: 1.0
+
+.DESCRIPTION
+This function discovers all of the KRBTGT accounts in the forest using ADSI and returns the account info, specifically the last password change.
+
+Currently, the script performs the following actions:
+    * Queries a Global Catalog in the Active Directory root domain for all KRBTGT accounts in the forest by querying the Global Catalog for SPN info.
+    * Provides information about all of the KRBTGT accounts in the forest, specifically the last password change.
+
+REQUIRES: Active Directory user authentication. Standard user access is fine - admin access is not necessary.
+
+.EXAMPLE
+Get-PSADForestKRBTGTInfo
+Perform KRBTGT account SPN discovery via AD and returns the results in a custom PowerShell object.
+
+.NOTES
+This function discovers all of the KRBTGT accounts in the forest and returns the account info.
+
+.LINK
+Blog: http://www.ADSecurity.org
+Github repo: https://github.com/PyroTek3/PowerShell-AD-Recon
+
+
+#>
+
+Param
+    (
+            )
+
+Write-Verbose "Get current Active Directory domain... "
+$ADForestInfo = [System.DirectoryServices.ActiveDirectory.Forest]::GetCurrentForest()
+$ADForestInfoRootDomain = $ADForestInfo.RootDomain
+$ADForestInfoRootDomainDN = "DC=" + $ADForestInfoRootDomain -Replace("\.",',DC=')
+
+$ADDomainInfoLGCDN = 'GC://' + $ADForestInfoRootDomainDN
+
+Write-Verbose "Discovering service account SPNs in the AD Forest $ADForestInfoRootDomainDN "
+$root = [ADSI]$ADDomainInfoLGCDN 
+$ADSearcher = new-Object System.DirectoryServices.DirectorySearcher($root,"(serviceprincipalname=kadmin/changepw)") 
+$ADSearcher.PageSize = 5000
+$AllADKRBTGTAccountSPNs = $ADSearcher.FindAll() 
+
+$AllADKRBTGTAccountSPNsCount = $AllADKRBTGTAccountSPNs.Count
+
+Write-Output "Processing $AllADKRBTGTAccountSPNsCount service accounts (user accounts) with SPNs discovered in AD Forest $ADForestInfoRootDomainDN `r "
+
+$AllKRBTGTAccountReport = $Null
+ForEach ($AllADKRBTGTAccountSPNsItem in $AllADKRBTGTAccountSPNs)
+    {
+        $KRBTGTAccountsItemDomain = $Null
+        [array]$AllADKRBTGTAccountSPNsItemDNArray = ($AllADKRBTGTAccountSPNsItem.Properties.distinguishedname) -Split(",DC=")
+                [int]$DomainNameFECount = 0
+                ForEach ($AllADKRBTGTAccountSPNsItemDNArrayItem in $AllADKRBTGTAccountSPNsItemDNArray)
+                    {
+                        IF ($DomainNameFECount -gt 0)
+                        { [string]$KRBTGTAccountsItemDomain += $AllADKRBTGTAccountSPNsItemDNArrayItem + "." }
+                        $DomainNameFECount++
+                    }
+        $KRBTGTAccountsItemDomain = $KRBTGTAccountsItemDomain.Substring(0,$KRBTGTAccountsItemDomain.Length-1)
+
+        [string]$KRBTGTAccountsItemSAMAccountName = $AllADKRBTGTAccountSPNsItem.properties.samaccountname
+        [string]$KRBTGTAccountsItemdescription = $AllADKRBTGTAccountSPNsItem.properties.description
+        [string]$KRBTGTAccountsItempwdlastset = $AllADKRBTGTAccountSPNsItem.properties.pwdlastset
+            [string]$KRBTGTAccountsItemPasswordLastSetDate = [datetime]::FromFileTimeUTC($KRBTGTAccountsItempwdlastset)
+        [string]$KRBTGTAccountsItemlastlogon = $AllADKRBTGTAccountSPNsItem.properties.lastlogon
+            [string]$KRBTGTAccountsItemLastLogonDate = [datetime]::FromFileTimeUTC($KRBTGTAccountsItemlastlogon)
+
+        $KRBTGTAccountReport = New-Object -TypeName System.Object
+        $KRBTGTAccountReport | Add-Member -MemberType NoteProperty -Name Domain -Value $KRBTGTAccountsItemDomain
+        $KRBTGTAccountReport | Add-Member -MemberType NoteProperty -Name UserID -Value $KRBTGTAccountsItemSAMAccountName
+        $KRBTGTAccountReport | Add-Member -MemberType NoteProperty -Name Description -Value $KRBTGTAccountsItemdescription
+        $KRBTGTAccountReport | Add-Member -MemberType NoteProperty -Name PasswordLastSet -Value $KRBTGTAccountsItemPasswordLastSetDate
+        $KRBTGTAccountReport | Add-Member -MemberType NoteProperty -Name LastLogon -Value $KRBTGTAccountsItemLastLogonDate
+
+        [array]$AllKRBTGTAccountReport += $KRBTGTAccountReport
+
+    }
+
+
+# $AllKRBTGTAccountReport | sort PasswordLastSet
+
+return $AllKRBTGTAccountReport
+}