It may be part of an "unfiction" project where the "story" is told through the act of downloading and decrypting the file itself. To provide the "complete story," I need a bit more context:
Are there any specific characters or themes (e.g., a "hag," a specific monster, or a technology glitch) associated with it?
However, based on the naming convention (a common pattern for "creepypasta" files or lost media mysteries), it likely refers to a niche internet mystery or a specific user-generated file. If this is a specific story or game you've encountered, here are the most likely contexts: