Verifying arbitrary files and no way to stop that process...

"unauthorized" !! automated!!! self-auto-launch of Verifying arbitrary files, and no way to stop that process... nor any help pages explaining this. i opened a simple movie file, and the process of verifying starts. and then even gets stuck all the time as well.

i just clean installed a new mojave system as well. it starts thos unauthorizez autolaunched "Cancer" app on its own, althought all firewalls are off, and all other options in that security sys prefs are turned off. it does it with mp4's.mov's. etc etc, which worked well just a few days ago, also with raw files from my cannon, it simply randomly pickes any kind of files and starts this process.

i also dumped all the apps into the private tab, to let them have full disk access, (as if i were interested in blocking my apps from opening their own files,... who would want that anyway,.... )

but nothing helps.