Files with vef extension may be found as exported, password protected contact backups from some HTC smartphones.
There is one other file type using
the VEF file extension!
.vef - Infinite Game Engine visual effects
VEF file extension - HTC encrypted contacts
What is vef file? How to open vef files?
File type specification:
File extension vef is nowadays mostly known to be associated with a special backup file generated with contacts backup function on certain HTC devices.
It appears to be a variant of password protected VCF file that is saved on memory card.
Apparently, these files can be imported/synced with Google if you use the HTC desktop software.
