May I suggest installing
Malwarebytes for Mac and that sort of thing may be detected and stopped. I put it on all our machines, PCs that is, which has saved me many times from having to do a clean install of the wife's machine because she will click on ANYTHING that pops up, especially on FarceBork. It is also on my Mac but since that isn't really used so I don't know how effective it is on it, however, it is FREE so the price is right.
