Hi Plasmicon,
my system has been using Kaspersky Internet Security for a long time, with regular full system scans. I also do weekly full system scans with Malwarebytes. The two are reputed to be a very good combination when used together this way. And yes virus definitions are always up to date.
After my last post when that virus message popped up I immediately did a full system scan again. The only thing that came up was this:
That was in some sort of cache file. Kaspersky said it could not disinfect the file and so it was deleted.
So my system is regularly checked for Trojans, viruses, etc, and the only issue I've had was shortly after running your file, and according to both my anti-virus softwares, the virus was in that file alone.
As you can see the name of the virus is very specific. It's not just some vague PUP (potentially unwanted program). It's a specific well known virus, and a rather nasty one that tries to steal things like banking info.
I have no idea if it's possible that your file was clean coming from you, but picked something up when it's went through the servers, etc. I do believe you will take all precautions to ensure your file is virus free.
I'm not saying your original file had the virus, it may well be clean, but based on the sequence of events, and what I've explained above, I don't see how the virus originated from my PC. This all happened shortly after I ran your file.
On a sidenote, I NEVER turn off my internet security software, even when install programs ask me to.