Sakis believes that an attacker has obtained the hash of the Kerberos service account from one of his organization's Active Directory servers. What type of attack would this enable?

Golden ticket attacks use the hash of the Kerberos service account to create tickets in an Active Directory environment. Kerberoasting attacks rely on collected TGS tickets. Pass the ticket attacks rely on tickets harvested from the LSASS process. Brute-force attacks depend on random guessing without any additional information.