Hi bob3160,
I also guess this has nothing to do with avast,
as these characters aren't very friendly in Chinese,
they read like "stubborn & idiot".
Folks at avast's and we here on the forums
are not calling anybody a "stubborn idiot".
At least it is not my formal way of addressing people.
Did it come from an attack of sorts, a webshell-attack?
These are rather common nowadays, and coming from China among other places.
polonus