HTX suspended withdrawals as they investigated the hack, and wrote that the company would "fully compensate for HTX's hot wallet losses". Security firm Cyvers said they believed the theft was enabled by a private key leak.
Poloniex was initially tight-lipped, posting on Twitter that they had "disabled for maintenance" an exchange wallet. Justin Sun later updated that they were investigating the "hack incident", and promised to "fully reimburse" the massive theft... somehow. He later tweeted that they would offer a 5% "bounty" to the hacker if they returned the funds within a week, threatening to "engage law enforcement" otherwise.
TrueUSD tries to claim no affiliation with tokens created by its deployer address, raising further questions
However, the post raised only more questions, as the $TEURO token had been deployed by the address that deployed the primary TrueUSD token. This means that either TrueUSD is lying when they claim they're unaffiliated with $TEURO, or some of their private keys were compromised, allowing an unrelated party to deploy a contract appearing to belong to them.
Huobi and related people have been busy refuting the rumors, with Huobi's social media head dismissing them as "baseless malicious attacks". Huobi "advisor" Justin Sun tweeted "4".
The decision may have been related to insolvency rumors surrounding Prime Trust, a US-based fintech company. On June 8, BitGo announced a non-binding letter of intent to acquire Prime Trust.
After the announcement, the TUSD stablecoin dipped as low as $0.9951. This is a seemingly small deviation from the $1 peg, but in the stablecoin world, such small variances can be serious.
- "TrueUSD stops minting via Prime Trust, loses dollar peg", CoinTelegraph
Indeed, it later turned out that Sun's team had farmed around 279,000 SUI (SUI does not yet have a reliable dollar price because it is set to launch later this month). Sun blamed the event on a TUSD market maker, writing, "Regrettably, some of our team members were not fully aware of the intended purpose for these funds and inadvertently used a portion of them to participate in exchange campaigns. Upon realizing this error, we immediately contacted the exchange team and arranged for a full refund of the funds." Those replying to his comment seemed more than a little skeptical that the incident was truly a mistake.
Poloniex was a US-based crypto exchange founded in 2014, which in 2018 was purchased by Circle, who intended to get rid of the illegal activity for which it was known. However, when they discovered that the customers who used Poloniex no longer wanted to use it once they were subjected to scrutiny, they sold the platform to Justin Sun in late 2019, who relocated it to the Seychelles and shut down US operations. It appears that the OFAC fine will apply to the US entity most recently controlled by Circle, and not to Justin Sun's operation.
In August 2021, Poloniex also paid more than $10.3 million to settle allegations from the U.S. Securities and Exchange Commission that it had operated as an unlicensed exchange.
With the exception of Soulja Boy and Mahone, the celebrities paid a total of more than $400,000 in disgorgement, interest, and penalties to settle the charges without admitting or denying them.