The alphanumeric code is not random. In firmware nomenclature for Chinese-manufactured STBs (set-top boxes), this typically denotes:
:
Verified status ensures the bootloader is secure and the file is uncorrupted. gx6605s s18069 software verified
Copy the verified .bin file to the root directory. Rename it to flash.bin or update.bin if required by your OEM. Do not place it in a folder. The alphanumeric code is not random