Bitget has raised the estimated value of assets taken in its Sept. 24 breach to $387.5 million as exchanges and security firms mobilize to freeze and recover the stolen funds.

The new estimate is up from $351.6 million after further on-chain tracing identified Zcash and TRON assets that were excluded from Bitget's initial accounting, Chief Executive Officer Gracy Chen said in a Sept. 25 update . She said the increase reflected transfers made during the original incident and that no additional unauthorized transactions had occurred.

Bitget said its investigation with blockchain security firms Mandiant and SlowMist remains underway, with further forensic findings expected as investigators establish how attackers breached its systems.

The exchange first detected the unauthorized transfers from some hot wallets at 18:31 UTC on Sept. 24 and suspended withdrawals while keeping deposits and trading operational. Its security team has since identified and patched the underlying vulnerability, according to the latest update.

The higher loss estimate comes as Bitget shifts its response toward tracing and recovery, drawing support from other crypto exchanges, blockchain projects and security companies.

Bitget said it has already frozen some affected assets in coordination with industry partners, though it has not disclosed their value.

Binance and Bybit are among the exchanges publicly supporting the recovery. Bybit's Chief Executive Officer Ben Zhou said the company would assist Bitget and update its LazarusBounty platform to track the stolen funds, returning support Bitget provided after Bybit's own $1.5 billion breach in 2025 . Bitget said it would use LazarusBounty as a main channel for its recovery campaign.

Chen said exchanges, foundations and security teams had already moved to freeze some attacker-controlled assets. Bitget has also published a real-time tracing dashboard, a reporting portal and an API containing attacker addresses to allow exchanges, stablecoin issuers, bridges and other infrastructure providers to monitor the funds.