Mars-like? Hah!My initial reaction was sceptical, but the concept of a volcanic vent on Mars with frozen ice as a carapace protecting life at moderate depths is certainly "possible" - indeed I've written on this myself.

Whether it's "probable" is a different issue. To date, no hot spots (or warm spots or less-cold spots) have been found on Mars, either in association with known volcanic constructs, near fossil fluid flow features, in or near recent gullies nor anywhere else on the planet.

Now Mars is not volcanically dead. It just has looooooooonnnnnnnnnggggggggg sleeps between eruptions. That huge time gap may make any near-surface life extinct by now. But life at depth - easy...