So do Hindus do not believe Brahman a cosmic intellect created the universe itself and created self-governing laws, actions, reactions, thereof? If your answer is yes then surely there is acosmic mind behind such concepts as karma whether they manage it or not.
No, Brahman is not God nor did it create the universe or anything in it, nor was Brahman created. It is the universe and everything that exists. Nothing created or manages the laws of karma. You have to divorce yourself from any analogy or comparison with the Abrahamic God and concept of existence, and justice.