Active any hints

Hi all

I have user.txt and understand that I need to use a technique called ‘k******ast’ to grab a hash of a password via the *** ticketing process but I can’t get the first step.
Everything I look at - such as enumerating to get the ‘SP name’ needs to run on the target machine.
I have tried connecting a remote PS session using the credentials I used to get user.txt but that doesn’t work either - any tips?
Thanks
Poe