HUSH

Jigsaw ransomware affected file
File type: Ransomware encrypted file
Files with hush suffix are in most cases files that were encrypted and renamed by some variant of the Jigsaw ransomware.
What is hush file?
File type category:
Ransomware encrypted file
Date updated: January 4, 2017
File extension hush appears to be newly used for one of the variants of Jigsaw ransomware that was first encountered in January 2017.
Much like other similar ransomware, it encrypts and renames user files.
How to open hush file?
Unless some decrypter for Jigsaw that handles .hush files exist, there doesn't appear to be way to recover the files.
How to convert hush file?
You would have to recover the files first, before you can convert them to anything else.