I have a Samsung Galaxy S7 with latest official Android for that phone installed. There are some files whose names worry me in my internal storage root directory, namely aavpsgdgfgdgfwsvmh999.dat, aavpsgdgf999.dat, which when opened, contain some hashes - length 24 bytes each - inside them. Do you know what they might be of and if they hint towards a virus? Could they be of a recent Android upgrade I did?