I believe at some point the site rules were amended to allow updating a map if the original author has been offline for a very long time. [citation:
https://www.hiveworkshop.com/threads/site-rules.245478/]
Of course, this concept might fly in the face of intellectual property laws in your country or region of residence. It would have been much preferred if the map files included a license file defining what you can and cannot do with them, instead of this stupidity where we have a 20 year old technological arms race where we pretend that
corrupting the game file "just so" so that it crashes the map editor but not the game indicated any sort of legal license or management of ownership.
It's not cryptography. Blizzard maps with "BLIZ" on the map icon are locked with cryptographic protection and have been since 2002. The only people who can update these maps are the folks at Blizzard who hold the private key, and judging by the fact that Reforged stopped signing maps cryptographically it's reasonable to assume that the original key was probably lost some time between 2005 and 2019 - which would mean
no one can update those maps.
But that doesn't affect "Hellhalt Td" at all since that's a user map, and there is no cryptographic way to sign and protect user maps from outside of Blizzard office.
So if someone just ran the file you're looking at through an optimization tool that changed variable names from
Region__001 to
aab to make it harder for you to understand the file, and then inserted empty or garbage information in place of the WTG and other World-Editor-only files, then at that point it's just a stupid technological arms race and if you care more than the person who started it, you can always win. Because the file is on your computer, and it is not cryptographically encrypted, so it's literally just a file and you can make or download a program to edit it, like any other computer file.
So you can just rename
aab back to
Region__001 if that's what you think it should be named. (Maybe you could ask an LLM to rename it, although I would not personally bother.)