Galaxy Research flagged a third wave of sweeps tied to weak Coldcard-generated keys, with the attacker now targeting smaller balances and changing how funds are collected onchain.Hacker facing screens with lines of code (Boitumelo/Unsplash)A vulnerability in a March 2021 Coldcard firmware release has enabled attackers to systematically drain bitcoin from thousands of wallets by reproducing keys generated with weak software-based randomness.Three distinct waves of attacks have now swept 1,367 bit...