I recently came across a pc with a Groovorio PUP/Virus on a pc. Since I removed it the owner of that pc started to get hundreds of spam hitting his gmail inbox which he uses regularly. The spam emails were not typical spam like marketing or click here but absolute gibberish, full of letters a-z and numbers 0-1; some letters in caps, some not. I'm not a 100% sure if they are related but I'm reaching out to see if anyone has an idea of what is happening. Also since gmail doesn't appear to have contact filtering only these spam emails are still getting through, we must of highlighted close to 1000 spam emails and reported them as spam but most still get through. Another weird behavior was that he got a amazon email saying he purchased a product and after verifying the purchase on his amazon account from another pc, it turned out to be a valid email so his amazon account was hacked. Again not sure if this is all related to groovorio PUP but it happened all at the same time.
So my questions are;
1. Does anyone know of a tactic a hackers uses that resembles this post behavior of a virus removal?
2. Is there any additional tips to apply to gmail to block these gibberish emails (not sure why gmail doesn't stop it to begin with)
3. does anyone the full extent of the Groovorio PUP's once it hits a pc?