Is it possible for Satan to work miracles?
Yes, it is! In Rev. 13:14, John describes, "the spirits of demons working miracles." According to Rev. 16:14, and Rev. 19:20, thousands will receive the mark of the beast because they have accepted Satan's false miracles.
Paul warns us in 2 Thess. 2:9-11 that Satan will work with all power, signs, and lying wonders. The apostle gives us a clue why man will be deceived. He says, "They received not the love of the truth." The only safety against deception is knowing Jesus, the author of truth and knowing the truth He authored. Isa. 8:20 reveals this penetrating insight, "to the law and the testimony if they speak not according to His word, it is because there is no light in them." Matt. 7:21 describes many coming to Jesus at the end declaring to have worked miracles in His name.
Yet the Savior says, "I never knew you (even when in His name they were working miracles) depart from me, ye that work "iniquity." The word iniquity is the same word in 1 Jn. 3:4 when John says, "sin is the transgression of God's law or lawlessness." If miracles lead to a disregard of the laws of health which God has placed in every nerve and tissue in our bodies or if they lead to a disregard of His moral law, the Ten Commandments, the power behind them is not from God.