The manager who approved this need to be fired. Programs need to ask permission to the user before installing, especially when they're not device drivers.
This is literal malware and there's also a chance that it might be exploited (example: a mitm Attack exchanges the file that armory crate is downloading)
This kind of Easter egg is not funny at all, developers must avoid undocumented time bombs. I still remember that day 15 years ago when I turned on my Wii and it said that the system files were corrupted. After hours of reverting a full nand backup via bootmii (and losing 2 years of game saves) it turned out that it was a funny April's fool by crediar, which put a fake system corruption message when you run his program on April 1st. Problem is that his program was a loader for the system menu so it was unavoidable if you didn't know that.
Like me, there must be someone paranoid that saw that black bar on the screen, saw a weird Christmas.exe running on their system, and starting wiping or restoring old images to "clean" that.