Following my title,
I received today an alert from BitDefender that 2 files infected with Gen:Variant.Zusy.337009 were found.
As I checked further, I could see that the files infected were related to a software I downloaded one week ago in order to have an online certification for Microsoft, with Pearson VUE . And since then, that application was sitting there, not opened by me or something since that day.
Why was it detected only today?