Electrum password alone isn't sufficient (assuming the attacker got it through your dropbox plain text file), he'd also need a copy of the electrum wallet file. Any idea how that was accessed?
If I understand the OP correctly, both the wallet file and a plaintext txt with the password were on a dropbox volume.
I don't use electrum but the way I understand it is the wallet is constructed from the 12 word seed.
That's why I asked Klee for kleerification... (*snort* sorry)
There's a
password that secures your wallet file, and there's the
master seed. With the seed, you're able to access the funds all by itself, but with the electrum password alone, you still need the wallet.
They had both..
EDIT: Apologies for not replying but I am trying to manage a mess here (format the computers, contacts with authorities, phone/skype calls etc)..
Heyyyyyyy ...DONT format. Keep the evidence !!!
Yes, seriously. Don't delete anything.
In fact, do the opposite.
Clone it.
Take that computer off-line. Clone to hard drive so you have multiple copies of it.
Then change all passwords and move all your existing accounts. EVERYTHING. Start from scratch with clients, passwords and all that.
Now that all accounts that can be secured are freshly secured, send out the clones of the drive.
There are some serious hackers that can dive into those clones and possible get some really good clues.
It is very possible if there was malware, it can be identified, where and who it came from.
There could be other clues too.
Your are offering lots of money as a reward, mailing out some extra hard drives is going to help a lot.