bsv – Digital Forensics Challenge Writeup | ImaginaryCTF 2022

Notice that the file is not binary; it is a text-based table format. The challenge name says BSV = BEE-separated-values, so treat BEE as the delimiter, like commas in CSV. Split each line visually by the BEE separator. The values form a grid. Empty-looking fields are background, while non-empty fields are “filled” cells. Render the grid mentally or by zooming out in an editor with a monospace font. The filled cells create large ASCII-art letters.