It's my first message and I'm crying...
I had about 3.5 bitcoin, I tried to use some a short while ago and got a message that there is a compulsory upgrade.
I downloaded and installed the upgrade on my iMac, restarted Electrum, and then it happened...
It immediately said there was not enough funds to transfer the amount of ALL my coins but continued trying to process it until it eventually said there is a zero balance.
BOOM! EVERYTHING IS GONE!!
:-(
so sorry for your loss but if you could trace the details of the transaction, perharps, you can flag and report it so people can be on the lookout for transactions coming from the receipient address. Phishing attacks have been around for sometime and I have personally been a victim of phishing attack on two occasions and it has made me wiser, though, my funds never got retireved but then it has further advised me on how to safeguard my only wallet.