As a foreward, I’m not an expert at this sort of thing and this is probably not a big deal or anything - I only ended up looking at it this thoroughly because the page to download the Windows Bnet client looked a bit off/odd in Firefox (this was resolved by switching browsers to Edge).
Anyway, when I right-click a freshly downloaded Battle.net-Setup.exe, select Properties, then the Digital Signature tab, select the only entry in the Signature list and click Details it says, in the General tab of the new Digital Signature Details window, “This digital signature is OK.”
If I go one step further and click the “View Certificate” button (in the middle-right of the current Digital Signature Details window) that’s where I noticed this, likely minor, detail in the General tab of the new Certificate window: Valid from 11/24/2020 to 11/29/2023.
It’s probably nothing, and I’m not worried or anything - if I go another step further to the Details tab and scroll to the bottom, I see an “Extended Error Information” field with the value “Revocation Status : OK. Effective Date <Wednesday, February 21, 2024 4:45:01 PM> Next Update <Wednesday, February 28, 2024 3:45:01 PM>”
I figured it might be worth passing on the information, however, in case it’s a minor oversight or whatnot.