I don't get it, you aren't supposed to get hacked or anything since you are running on a Linux build mining OS, the culprit can't be hiveOS, may be your email is compromised, try changing your email password and activate 2FA, I use 2FA with nicehash on my PC
You log into a website to make changes to your mining wallets, pools, ect.. which can be hacked if you use stupid passwords or the same email passwords that have been compromised in the past.