Tether, the company behind dollar-pegged cryptocurrency reported about the hack attack. According to the official announcement, over $30M were stolen.
— Tether (@Tether_to) 21 ноября 2017 г.
$30,950,010 USDT was removed from the Tether Treasury wallet on November 19, 2017 and sent to an unauthorized bitcoin address. As Tether is the issuer of the USDT managed asset, we will not redeem any of the stolen tokens, and we are in the process of attempting token recovery to prevent them from entering the broader ecosystem. The attacker is holding funds in the following address: 16tg2RJuEPtZooy18Wxn2me2RhUdC94N7r. If you receive any USDT tokens from the above address, or from any downstream address that receives these tokens, do not accept them, as they have been flagged and will not be redeemable by Tether for USD.
Tether Team performed these steps:
- The tether.to back-end wallet service has been temporarily suspended. A thorough investigation on the cause of the attack is being undertaken to prevent similar actions in the future.
- New builds of Omni Core were provided to the community. (Omni Core is the software used by Tether integrators to support Omni Layer transactions.) These builds should prevent any movement of the stolen coins from the attacker’s address. Developers strongly urge all Tether integrators to install this software immediately to prevent the coins from entering the ecosystem. Again, any tokens from the attacker’s address will not be redeemed.
Note that this software will cause a consensus change to currently running Omni Core clients, meaning that it is effectively a temporary hard fork to the Omni Layer. Integrators running this build will not accept any token sends from the attacker’s address, preventing the coins from moving further from the attacker’s address.
- Developers are working with the Omni Foundation to investigate ways that will allow Tether to reclaim stranded tokens and rectify the hard fork created by the above software. Once this protocol enhancement is complete, the Omni Foundation will provide updated binaries for all integrators to install. These builds will supersede the binaries provided above by Tether .to. After the protocol upgrades to the Omni Layer are in place, Tether will reclaim the stolen tokens and return them to treasury.
It is also worth noting that Huobi Pro
— Huobi Pro (@HUOBI_Pro) 21 ноября 2017 г.
and Okex suspended the USDT trading at the moment.
— OKEx (@OKEx_) 21 ноября 2017 г.