Yes Satanism, in one of the oldest form that we know and we have remaining notes of is Sanatan Dharma. This name "Satan" is originated from Sanskrit/oriental territories. Sat (Satya) an (ananta) means ethernal truth, SatNam or it's longer form that we use as a mantra daily: Satanama, that means the identity (/name) of the truthful God.
Sanat Kumara, the Serpent God, means "Ethernal Lord", and is basically the ruler God of Earth.
Usually in every mithology, Satan is the God of the Serpent, and is among the ruler Gods, if not the Highest.
The common people's mind is corrupted, but it is a very good starting point, that you were always against that corrupted perception on Satan.