Updated my Service-Perms.exe to Powershell, grab a copy here:
https://github.com/benpturner/h00k/blob/master/powershell/Service-Perms.ps1
Usage direct from the Internet within Powershell:
IEX (new-object system.net.webclient).downloadstring("https://raw.githubusercontent.com/benpturner/h00k/master/powershell/Service-Perms.ps1"); Get-ServicePerms
Outputs an HTML