As the first part above was just the thoughts pouring in to my mind that I had to post it immediately.
Here's some clarifications.
Again I am using Electrum 4.3.2. That wallet has been telling me to update itself but I neglected that info thinking the wallet is safe.
The 12 word pass phrase was never written on any document online. I wrote it down directly into my personal notebook. The password to it is also unique for which I have never used anywhere else.
The problem is my system had no anti-virus or whatsoever, it does have windows defender but now, I think that shitty app isn't doing anything. I got zero ping that someone is accesing my system. If I haven't been informed by Coinomize team that the funds were transferred, I wouldn't have notice it since the Electrum wallet was last openned four hours ago after the funds were transferred. Meaning, the wallet is offline.
I know all of you will not believe me but I will do everything I can to repay the lost funds even if it takes a while.
The Yo!Mix team and Coinomize team will probably post a scam accusation soon and rightfully so since I have no means to prove my innocence. I will accept whatever this community would think of me as I know this is all my fault for being so careless and stupid.
I've been in this forum since 2017 and I'm truly heart broken that this happened.
Sorry to hear about your loss, I hope you are able to recover the funds and carry on with your business.
Everybody seems to want to jump to the conclusion that your system was hacked, or you suffered due to some malware or virus, but it's been my experience that most of the time these things are a result of carelessness. I'm not convinced that you've been hacked or infected with malware.
You said you wrote down the seed phrase in your personal notebook, correct? Did you also write the seed phrase for hardware wallet in the same note book? How securely is that notebook stored? Did you leave it out somewhere where someone could have seen it? You seem to be confident that the funds in your Ledger wallet are safe, how can you be so sure? You mentioned that you only have alts stored in the Ledger, it may be just a matter of time before the thief finds those accounts too.
Until you can answer the question of how this happened to your hot Electrum wallet, you should assume that all your seed phrases and all your funds are compromised.
Good luck.