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Russia and China-backed hackers are exploiting WinRAR zero-day bug
(techcrunch.com)
This is a most excellent place for technology news and articles.
No no no no
It was primarily used to post to USENET.
Back in the day, every byte of data was precious and bandwidth was insanely limited, nobody would ever email an attachment for that.
Due to some of the technical details about how email works, that would end up just bloating the file size and it would be the literally most inefficient way possible to send large blobs of data.