Only possible if encrypted with the Off-Line key.. "Neer" ransomware uses RSA Salsa20 cipher, which is not easy to crack.
However, if you are talking ONLY about media files, in some cases it is possible to recover these with a minimal loss. Most of these types of Stop/DjVu ransomware tends to encrypt
the very first 150KB of each file, to speed up the encryption process.
There's a Free Tool to do this. Download from the following link and try.
https://www.disktuna.com/media_repair-file-repair-for-stop-djvu-mp3-mp4-3gp/
You need a reference file - In other words, a full, unaffected example file created on the same device or with the same software.