From what I know, they needed my password to initiate a transaction, correct? They must have somehow logged that password when I opened the wallet to sign an address for the Yomix team to deposit the BTC funds 'cause prior to that $1,000 was just sitting on it from Coinomize for almost a week amd nothing happened to it.
I agree it's most likely reason why your Electrum wallet was hacked. But it doesn't answer how the malware or hacker infiltrate your PC. I'd look for list of application that was installed, updated or run for first time since you receive $1.000 from Coinomize if i were you.
Needless to say, I will wipe the shit of this OS tomorrow and install a new one with just minimal apps and zero hotwallets.
While you're at it, you may want to ask for advice about security or wallet setup either on
Wallet software or
Beginners & Help.