I just updated to Ventura 13.5 from Monterey. Mac Studio M1. When i look as resources, i found one resource that provide PID but not name. Is that a virus ? Using ps -ef | grep PID, it show some related framefowk to FollowUp
As you have discovered (from your ps screenshot) the app running is part of macOS. I can't find a simple explanation of what it does - some communication with Apple involving lots of Apple services and notifications.
On my Mac I have the followupd process, but not the followupui process. I don't know why.
But have a read of all of this Concerned about spyware and drive-by downloads on my Macbook Pro which sounds like your worry. But from 5 years ago. One of the comments suggests that the blank process name can be the result of a language mismatch. What are your language settings?
Having said that there may have been a vulnerability related to CoreFollowUp and the followupd process in Catalina and earlier. https://rambo.codes/posts/2022-03-1...d-for-a-serious-phishing-attack-against-users But I have no idea about the accuracy of this. And the underlying structures of macOS have changed drastically since Catalina, so I doubt this could an issue now.
I am "reasonably" confident that there is nothing to worry about except perhaps sorting out the blank name.