I recall malware named GALAXY on the DEC-10, 1978 perhaps. It was a tempting program filename for students hunting around for new games to play besides ADVENT and WARGAM. The program copied hundreds of empty files with random filenames making it very time consuming to do a series of wildcard deletes that did not get the files you wanted to keep. The person who wrote it added inline backspace characters to black out the offending lines of code line when you printed it, unless you printed it out on a line printer where you could advance the platen by hand when it got to that line. I think I still have the DECTAPE with a copy hidden away somewhere.
