Qubic Restarts Blockchain and Opens Claims After $1.4M Seed‑Generation Hack

Overview

• An attacker reconstructed predictable recovery phrases and drained roughly 2.94 trillion QU, about $1.4 million, from 1,404 wallets in an incident that took place between late October 17 and early October 18.
• Qubic halted its layer‑1 chain at tick 85,371,949 to contain transfers, moved affected funds into protected escrow, and its validator quorum known as Computors approved a recovery plan.
• The network resumed processing after the pause and Qubic says initial repayments have been made to verified owners through its official reclaim portal.
• Affected users must generate new wallets if they created seeds before web wallet v4.26.4, submit claims by May 1, 2027, and provide supporting evidence beyond wallet signatures because reproduced seeds can produce valid signatures.
• Investigations found that the root cause was insufficient randomness in seed generation, a flaw that cannot be fixed retroactively, and a separate Ledger probe reported an unauthorized hardware implant in one device while MEXC froze the exchange account that received some stolen tokens.