It hasn't popped up since I deleted mapgenie for the division 2,
Mapgenie for red dead redemption 2,and Craigslist pro (free version)
Also cleaned my browser cashes.
I don't think it was in a app though unless its time delayed malware because I didn't Install anything new in 98 days and it just started popping up last week.
Keep us posted, if the symptoms persist!