I still don't understand if this is just a rant about how the hacker stole BTC from Exmo's clients, or a rant to the "stupidity" of the hacker that at the 207 transaction managed to trick himself into ruining his previous work - either way I would just like to say that you can't assume people know about all the hacks that are made against exchanges (let alone smaller ones). I was able to find some information while googling this "hack", and according to Exmo themselfs [1] here's the main address:
We have detected that some amounts of BTC, XRP, ZEC, USDT, ETC and ETH have been withdrawn to the hackers’ private addresses on December 21st, 2020 between 00:00 – 10:00 AM, UTC. Currently, almost the entire amount of stolen BTC is stored on the following BTC wallet: 1A4PXZE5j8v7UuapYckq6fSegmY5i8uUyq
Albeit a "dent" in anyone's life, it seems that the attack "only" represents about 6 % of the company's total assets[1]:
Compromised due to the hack amount makes up around 6% of the company’s total assets. We don’t believe it could somehow affect a going concern basis for EXMO. The company’s policy is to store around 5-10% of all its assets on hot wallets to enable fast withdrawals for users and limit potential losses from the hacks. At the moment of the hack, there was approximately 5-10% of BTC on a withdrawal wallet according to the internal rules.
I went by their website to see if they already had some more recent news regarding the incident but sadly the lastest one (regarding this subject) was from 23-12-2020[2]:
Our investigation is ongoing, and we are taking all necessary and precautionary measures to prevent such incidents from reoccurring.
Just a note though, this wasn't just limited to BTC[3]:
In terms of units, 292 BTC (about $6.5 million) has been stolen, and transactions of another 18.5 BTC ($415,000) are waiting to get confirmed in the Bitcoin mempool, said Igamberdiev. The rest of the units include 867 ETH (about $521,900), 476,521 XRP (about $247,700), 20,651 ETC ($126,800), 50,000 USDT ($50,000) and 39,285 ZEC ($2.7 million).
For anyone curious here's the address on Blockchair :
https://blockchair.com/bitcoin/address/1A4PXZE5j8v7UuapYckq6fSegmY5i8uUyqThe balance was drained to 0, and he's got quite a lot of transactions recorded, mostly limited to 1 address which I assume was then sent to another one (probably some mixer I assume).
[1]
https://info.exmo.com/en/notifications/security-incident-report/[2]
https://info.exmo.com/en/notifications/security-update-further-steps/[3]
https://www.theblockcrypto.com/post/88692/crypto-exchange-exmo-hacked