In the early hours of April 6, decentralized exchange Filament, built on the Sei blockchain, suffered a major exploit that resulted in the loss of approximately $572,000.
The incident occurred between 12:00 AM and 4:00 AM UTC, and attackers manipulated the platform’s order book system using large trades and self-liquidations across multiple accounts to siphon funds.
Filament, which held about $680,000 in user deposits before the breach, promptly halted all trading and withdrawals once the suspicious activity was detected. In a statement released via X, the platform confirmed that it has launched a full-scale investigation in collaboration with law enforcement and blockchain security experts to trace the stolen funds.
Post-exploit tracking revealed that the attackers moved the funds through the Symbiosis Bridge before offloading them on various exchanges, predominantly FixedFloat. Filament has shared the wallet addresses and transaction data with relevant authorities and forensic analysts to aid recovery efforts.
To recover the stolen assets, Filament extended a 10% bounty offer—worth around $57,000—to the perpetrator, conditional on the full return of the remaining funds and complete cooperation. The team has indicated that the terms are negotiable.
Abhitej, Filament’s co-founder, also issued an update on X, stating that the team is reviewing system logs minutely and is actively working on a restitution plan for affected users, particularly those in the platform’s COMB Pool. A detailed incident report and a recovery process are expected to follow.
Notably, the crypto sector faced significant security challenges, with losses amounting to $1.64 billion from hacks, according to Immunefi’s Q1 2025 report. DeFi platforms suffered 38 attacks totalling $106.8 million, while centralized platforms experienced two incidents leading to $1.5 billion in losses. The Filament breach is noted alongside a similar exploit at Hyperliquid, which lost $10.63 million in March due to a self-liquidation attack. A trader involved in suspicious activity on Hyperliquid is potentially down almost $1 million.
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