I have a MacBook which was recently bought and macOS Sierra 10.12.5
Sometimes the weird files named '!' and 'export' are being created in some random directories, for example in my home directory or in others. The files are 0kb both and have such permissions and owner:
-rw-r--r-- alx(my user) staff
What application creates such files and why? I'm tired of deleting these files from everywhere.