Exchange Information
BigONE is a global cryptocurrency exchange that provides a platform for trading various cryptocurrencies. It was founded in 2017 and registered in the Seychelles. The group operates in Russia, Brazil, Vietnam, Seychelles, Singapore, Japan, and Indonesia, providing marketing, investment, and blockchain technology research & development.
Methodology
Total Assets: Total value of all coins held in the smart contracts of the protocolView code on GitHubHacks
Date: Jul 16, 2025
Amount: $27m
Classification: Frontend & Infrastructure
Technique: Supply Chain Attack
On July 16, 2025, BigONE crypto exchange suffered a supply chain attack where an attacker gained access to production infrastructure and modified critical backend logic to automatically approve fraudulent withdrawal requests. The attack drained approximately $27 million across five blockchains before being detected.
Chains: Bitcoin, BSC, Ethereum, Solana, TRON
Target Type: CEX