The Werewolf: A Midnight Terror(1975)

Original title: O Lobisomem: O Terror da Meia-Noite

A millionaire lives in a sinister cottage where strange events unfold. A damned creature, he transforms himself in a werewolf and leads a following whose adepts spread horror and despair in the neighboring city, becoming themselves a clan of assassins. One day, the werewolf confronts Branca Justiça (White Justice), who summons benign forces to scathe them and frees him of his own wickedness.