You can call it virus ,that's fine , let say its a virus what 'crypto jacking" your miner 
Be careful if you have one ASIC " infected " and you have more than one ASIC , within a short period of time all of your ASIC will be a "crypto jacking victim" , or we can say infected with a virus
If there is no signature protection on the firmware you are using, that "virus" simply gets through the ASIC firmware script.
To protect your ASICs from getting infected, install Bitman firmware (released after December 1, 2019) all on your asic you have.
The network device password and ASIC password always must to be different !
If the infected ASIC gets into the network, it will infect the others despite the firewall.
HERE IS some info for you , How to Save your ASICs , if you know how to run some commands
Be careful if you have one ASIC " infected " and you have more than one ASIC , within a short period of time all of your ASIC will be a "crypto jacking victim" , or we can say infected with a virus
If there is no signature protection on the firmware you are using, that "virus" simply gets through the ASIC firmware script.
To protect your ASICs from getting infected, install Bitman firmware (released after December 1, 2019) all on your asic you have.
The network device password and ASIC password always must to be different !
If the infected ASIC gets into the network, it will infect the others despite the firewall.
HERE IS some info for you , How to Save your ASICs , if you know how to run some commands