This is almost beyond funny. I googled "Avira antivirus cryptomining" to see if I could find any other sources, and quite a few results [0][1][2] are from Aviras own blog warning about crypto mining viruses. One of the solutions mentioned are actually to install Avira. Yes, these are written a few years ago, but the irony is just incredible.

[0] - https://www.avira.com/en/blog/illicit-mining-software-beware... [1] - https://www.avira.com/en/blog/crypto-miners-coinhive-malware... [2] - https://www.avira.com/en/blog/yes-your-device-can-be-hit-wit...