I now is not a BTC miner, and I now blisz has a deevfee , but is an antminer and all aperrate the same. This is not a deevfee, the mineri work fror e hacker at the nicehaspool.
I had 2 antminer s9 whith infection and after upgrade firmware it waz ok.
The anminer l3+ can change the firmware after up-grand from web, i have to put a SD card.
whiht regards, florin c.