This question is wide open.
We could also ask, what is satan after in our lives? Even though we are no parallel for the Lord Jesus Christ, he is still after us.
Where should we start?
In Matt 4 the enemy questions Jesus 2 times, twice he asks if He is the Son of God, and then he says he will give Jesus that which is already His.
If we look at Isaiah 14v12-14, we see satan's desire to be like the Most High - God.
For me, satan saw that Jesus was indeed God, and wanted to be God, has always wanted to be.
1 Cor 2v8 says, 'Which none of the rulers of this age knew, for had they known, they would not have crucified the Lord of glory.'
Whether this refers to political or spiritual rulers, or demonic rulers, as I've read, I don't know, but scripture says they would not have crucified the Lord had they know.
That it from me, others are better equipped to deal with your questions.
God bless