COLDCARD hacker identified by researchers due to on-chain patterns such as fixed fees

Odaily News: According to Bitcoin News monitoring, Alex Thorn of Galaxy Research stated that researchers initially identified the first wave of COLDCARD thefts through a unique on-chain pattern: thousands of automated asset transfer transactions used the same fixed fee and exhibited identical transaction behavior. This characteristic enabled analysts to trace the attacker's activity through Bitcoin's UTXO history and map out multiple rounds of coordinated theft.