Q: Does anyone know what 0kibC7.dmg is?

Hey gall23,

I understand your concern with that .dmg file that was downloaded. It is safe to say that if you don't know where you downloaded the file from and very wary of what the contents are, then I would delete that file and empty the trash. Take a look at the link below for more details on dealing with attachments and files downloaded from the internet. 

Safety tips for handling email attachments and content downloaded from the Internet
https://support.apple.com/en-us/HT201675

Take it easy