2 Corinthians 4, is definitely talking about Satan / The Adversary.
“3But if our gospel be hid, it is hid to them that are lost: 4In whom the god of this world has blinded the minds of them which believe not, lest the light of the glorious gospel of Christ, who is the image of God, should shine to them. “
“In whom the god of this world,” is a description of the devil, AND it has parallels in “the prince of this world” (John 14:30), “the prince of the power of the air” (Ephesians 2:2). The world which “lieth in wickedness,” perhaps in the evil one (1John 5:19), worships the spirit of hate and falsehood and selfishness, and in so doing it practically deifies the devil. And the work of that god of this world is directly in antagonism to that of God. He seeks to lead men back from light to darkness. “He blinded” (the Greek tense indicates an act in past time without necessarily including the idea of its continuance in the present) “the minds of the unbelievers.”