I wrote a blog post about popular ransomware group TOR (darknet) showcase sites (here).
The purpose of this entry is to add additional sites to the list (so you should check that one out first).
Astro Tream
anewset3pcya3xvk73hj7yunuamutxxsm5sohkdi32blhmql55tvgqad.onion
CUBA FREE
cuba4mp6ximo2zlo.onion
Babuk Ransomware
wavbeudogz6byhnardd2lkp2jafims3j7tj6k6qnywchn2csngvtffqd.onion
Ragnarok ransomware
wobpitin77vdsdiswr43duntv6eqw4rvphedutpaxycjdie6gg3binad.onion
Everest Ransomware
ransomocmou6mnbquqz44ewosbkjk3o5qjsl3orawojexfook2j7esad.onion
Ransomex ransomware
rnsm777cdsjrsdlbs4v5qoeppu3px6sb2igmh53jzrx7ipcrbjz5b2ad.onion