"fornode" spam?

I think there may be a new spam bot that's able to apply for user accounts on 4.7.x installs. I keep getting requests for a new user named "fornode" with a few different email addys (to which a note generates no reply). I did a Google search, and this username has turned up on several Drupal blogs across many topic areas as a recent new user. I use the captcha module and I verify all new user requests, but if you're on auto approvals, you might want to keep an eye on it for a while.