If you are referring to a specific story or digital horror project, it might be related to one of these:
Is it a creepypasta story, a technical error message, or a game walkthrough? File: Helltown.zip ...
There are several lo-fi horror games titled Helltown (such as the one by WildArts) that deal with cults and 1950s-era mystery. If you are referring to a specific story
A famous urban legend about an abandoned town rumored to be haunted or involved in government cover-ups. Stories often circulate as "leaked" files or documents. a technical error message
In some internet horror mysteries, ".zip" files are used as a storytelling device where the "contents" are described in text form to build suspense.
(e.g., a specific forum like Reddit, a Discord server, or a YouTube video?)