Patriarch Kirill told the state-run Rossiya-1 TV channel on Russian Orthodox Christmas on Monday: "Every time you use your gadget, whether you like it or not, whether you turn on your location or not, somebody can find out exactly where you are, exactly what your interests are and exactly what you are scared of," according to a BBC translation .
He appeared to refer to the use of smartphones, location services, and the internet of things.
"If not today, then tomorrow, methods and technology could appear that will not just provide access to all information, but will also allow the use of this information," Kirill added. "Do you imagine what power will be concentrated in the hands of those who gain knowledge about what is going on in the world? Such control from one place forebodes the coming of the Antichrist."
The bishop clarified that the Russian Orthodox Church was not against "technological progress," but "the development of a system that is aimed at controlling a person's identity," the BBC reported.
"The Antichrist is the person who will be at the head of the worldwide web, controlling all of humankind," he said.
Although Kirill wields great influence within Russia's religious community, and is a close ally to President Vladimir Putin, his statement didn't appear to convince many Russians online.
Many Russians mocked Kirill's statement online.
Michael Avrisnky, a man in the southwestern city of Magnitogorsk, posted a photo of the bishop posing in front of selfie stick with the caption: "Smile, the Antichrist is about to fly out."
The new religious order effectively undermines Russia's religious power in Ukraine.
Ukrainian President Petro Poroshenko said on Monday , after celebrating the Ukrainian Orthodox Church's first Christmas independent from Russia: "We broke the last fetters tying us to Moscow."