Files with a5zfn file extension can be lately found as encrypted files affected by the Alma Locker ransomware.
A5ZFN file extension - Alma Locker ransomware affected data
What is a5zfn file? How to open a5zfn files?
File type specification:
The a5zfn file extension seems to be mainly related to one of the many known ransomware, this particular one labeled as Alma Locker.
It encrypts a victim's data and then demands a ransom of 1 bitcoin within five day.