No worries. Gramps (desktop) is where I do work on my main tree, and then personally I will do a one-way sync (so that it can’t “corrupt” my tree) up to my GrampsWeb docker frontend so that the rest of my family can view the data.
You can use the Gramps desktop app on your normal computer and then host a frontend using Gramps.js
The blog post regarding this “dump” suggests that it was actually from malware, so the answer to “Does that mean malware was once on your system?” is likely to be Yes. https://www.troyhunt.com/processing-23-billion-rows-of-alien-txtbase-stealer-logs/