This filename structure is common in several contexts, which may help you identify the correct source:
: "Mojo" is a recurring theme in cybersecurity competitions (like the Google CTF "Mojo" series). However, those typically involve Mojo IPC in the Chromium browser rather than a .rar archive. Mojo.2.rar
Is it related to a or a specific software project ? This filename structure is common in several contexts,