This is not a tool for the average user, but for security researchers, malware analysts, and CTF players, it is a valuable addition to the toolkit. It automates a tedious process that would otherwise require manual hex analysis. If you need to find where an application is hiding its encryption key, "AES Key Finder 19" is a solid choice.
Initially focused on UE 4.19–4.24, version 1.9 expanded support to include versions 4.25, 4.26, and 4.27. aes key finder 19 by ghfear