"On Oct. 10, NYSE shall be erased from the Internet. On October 10, expect a day that will never, ever be forgotten," the creepy digital voice says.

It's not clear if this would just be an attack on the NYSE website or on the electronic communications of the exchange itself. Obviously, an attack on the latter would be a lot more serious since it could interfere with financial market operations.

A spokesman for the NYSE could not be reached immediately.

Here's the video: