Cryptocurrency platform Wormhole shed around $300 million next a cyber assault Wednesday, marking the newest in a string of main heists in opposition to cryptocurrency platforms.

Wormhole is a “blockchain bridge,” a system that will allow the trade of cryptocurrencies throughout unbiased blockchains. Wormhole tweeted that Wednesday’s assault transpired as a outcome of an “exploit” that permitted attackers to steal 120,000 wrapped Ethereum (wETH), a token used to convert Ethereum into other cryptocurrencies that maintains the identical price.

In accordance to a Wednesday web site by cryptocurrency analytics service Elliptic, threat actors utilized the exploit — which appears to have occurred owing to incorrect account validation — to mint 120,000 wETH, which is  worth close to $320 million, just before transferring 93,750 Ethereum (just underneath $250 million) this is dependent on details from Ethereum analytics platform Etherscan.

The website also pointed out a transaction to the attackers from Wormhole that included a observe providing a $10 million bounty for the return of stolen cash. The 93,750 Ethereum appears to continue being in the attacker’s wallet.

Wormhole also furnished a timeline of the incident on Twitter. The attack happened at 6:30 p.m. UTC on Wednesday (roughly 1:30 p.m. ET). The exploit was patched about 6 hours later, and resources had been restored early on Thursday early morning. Shortly immediately after, the token bridge, which had been taken down next the attack, was set again on the net.

In a different tweet early Thursday, Wormhole wrote that “all money have been restored.”

Questions continue being concerning how precisely Wormhole managed to restore $320 million in Ethereum, as the cash do not appear to have been recovered from the attacker specifically.

UPDATE: Leap Buying and selling, a trading company with a aim in cryptocurrency, introduced in a Tweet Thursday that it experienced replaced Wormhole’s shed money. Soar obtained Wormhole’s developer, Certus A single, last 12 months.

Wormhole has not responded to SearchSecurity’s ask for for remark.

A variety of cryptocurrency exchanges have shed thousands and thousands of pounds to thefts in modern months. BitMart lost approximately $150 million in a December breach. Crypto.com, in the meantime, lost about $35 million in an assault very last thirty day period.

Alexander Culafi is a writer, journalist and podcaster based in Boston.