Change MAC Address Windows

Change-MACAddress.ps1

# credit to http://www.isolation.se/change-mac-address-with-powershell-of-a-wireless-adapter/
function random-mac {   
    $mac = "02"
    while ($mac.length -lt 12) 
	{ 
		$mac += "{0:X}" -f $(get-random -min 0 -max 16) 
	} 
		
    $Delimiter = "-"
		for ($i = 0 ; $i -le 10 ; $i += 2) 
		{ $newmac += $mac.substring($i,2) + $Delimiter }
		$setmac = $newmac.substring(0,$($newmac.length - $Delimiter.length)) 
 $setmac
}


function disconnect-wifi { 
    $CurrentSSID = (& netsh wlan show profiles | Select-String 'Current User Profile' | Foreach-Object {$_.ToString()}).replace("    Current User Profile : ","$null")
    Write-Host "Current WLAN SSID: $CurrentSSID"  -ForegroundColor Yellow

    $WIFI = Get-WmiObject -Class Win32_NetworkAdapterConfiguration | Where { $_.IpEnabled -eq $true -and $_.DhcpEnabled -eq $true}
    Write-Host "Releasing IP addresses:" ($WIFI.IPAddress | select -first 1)  -ForegroundColor Yellow 
    $WIFI.ReleaseDHCPLease() | out-Null 

    # Make sure the Release have happened, else it give it 2 sec extra. 
    $WIFI = Get-WmiObject -Class Win32_NetworkAdapterConfiguration | Where { $_.IpEnabled -eq $true -and $_.DhcpEnabled -eq $true} 
    if ($WIFI.DefaultIPGateway -ne $Null) { 
    Write-Output "Release of IP Address had not completed, waiting 1 Seconds" 
    sleep -Seconds 2
    }

    Write-Host "Disconnecting from WiFi" -ForegroundColor Yellow 
    & netsh wlan disconnect | Out-Null
} 


function new-wifimac ($wifiadapter, $ssid, $newmac){ 

#    Write-Output "Wifi AdapterName: $wifiadapter" 
#    Write-Output "SSID: $ssid" 
#    Write-Output "New MAC Address to set: $newmac" 

    $oldmac = (Get-NetAdapter -Name $wifiadapter).MACAddress 
    Write-Output "OLD MAC Address: $oldmac" 

    if ($oldmac -like $newmac) {
        Write-Host "Old MAC and New MAC are identical, generating a new MAC Address" -ForegroundColor Red
        $newmac = random-mac
        Write-Output "New MAC Address to set: $newmac" 
        }

    Get-NetAdapter -Name $wifiadapter | Set-NetAdapter -MACAddress $newmac -Confirm:$false
    Get-NetAdapter -Name $wifiadapter | Disable-NetAdapter -Confirm:$false
    Get-NetAdapter -Name $wifiadapter | Enable-NetAdapter -Confirm:$false
    $currentmac = (Get-NetAdapter -Name $wifiadapter).MACAddress 
    Write-Output "NEW MAC Address: $currentmac" 

    Write-Host "Connecting to SSID: $ssid" -ForegroundColor Yellow 
    & netsh wlan connect name=$ssid ssid=$ssid

    $NoIP = 0
    Do { 
        $WIFI = Get-WmiObject -Class Win32_NetworkAdapterConfiguration | Where { $_.IpEnabled -eq $true -and $_.DhcpEnabled -eq $true}
        
        if ($WIFI.DefaultIPGateway -ne $null) { 
            $NoIP = 5
        }
        else {
            sleep -Seconds 2 
            Write-Host "Waiting for IP Address" 
            $NoIP += 1
        }
    } While ($NoIP -lt 5) 
    Write-Host "New IP addresses" ($WIFI.IPAddress | select -first 1)  -ForegroundColor Yellow 
}


function test-wifi ($probe){ 
    if (Test-NetConnection -ComputerName $probe -CommonTCPPort HTTP -InformationLevel Quiet) { 
        $result = "Working" 
    } 
    else { 
        $result = "NotWorking" 
    }
$result 
}


# Specify $SSID manually 
# $ssid = 'SSID-to-Connect-to' 
# 
# Or use the currently used SSID to reconnect to. 
$ssid = (& netsh wlan show interfaces | Select-String ' SSID ' | Foreach-Object {$_.ToString()}).replace("    SSID                   : ","$null")

# Specify WLAN Adapter Name Manually 
# $wifiadapter = 'vEthernet (External Wi-Fi)'
# 
# Or Try to identify the Wi-Fi Adapter 
$wifiadapter = (Get-NetAdapter | where Status -EQ "Up" | where MediaType -EQ "802.3" | where MacAddress -EQ (Get-WmiObject -Class Win32_NetworkAdapterConfiguration | Where { $_.IpEnabled -eq $true -and $_.DhcpEnabled -eq $true} | select *).MACAddress.replace(":","-")).Name

# Specify a MAC Address manually
# $newmac = "02-F4-D7-B2-FE-D8"
#
# Or generate a new Random MAC Address
$newmac = random-mac

disconnect-wifi
new-wifimac -wifiadapter $wifiadapter -ssid $ssid -newmac $newmac 
test-wifi -probe www.msftncsi.com