I am on Electrum 3.3.4, my wallet is encrypted with a safe password I use nowhere else, is this a good enough extra measure to protect from recent electrum attacks ?
Actually no.
The only protection (from the recent attacks) is to ALWAYS verify you download Electrum only from it's official website (https://electrum.org/#download)
The recent attacks tricked users into downloading a fake Electrum that runs and looks just like the original one and users typed in their password. As soon as the wallet was opened, the funds are automaticly transferred to the scammers bitcoin address.
Oh my god, thank you, now I know better. Anyway I checked the download source, I checked the signature, it all seems ok. I am connected on hodlister.co, which seems fine from the DOS attack so far.