How a program can run by him self ?

For example a ransomware worm like wannacry, when he spread, he is on the computers but nobody has to click on it to run it, he runs by himself. Can anybody can explain to me how it works ? Thanks

submitted by /u/Mx_Mlr
[link] [comments]

from hacking: security in practice https://ift.tt/3l7gZl1