COLDCARD Hacker Identified via Fixed Fee Rates and On-Chain Patterns

Researchers pinpointed COLDCARD attacker using consistent fee rates and transaction behaviors, enabling mapping of coordinated theft waves across Bitcoin UTXO history.

Woofun AI reports that Galaxy Research analyst Alex Thorn identified the initial wave of COLDCARD thefts through a distinct on-chain signature. Thousands of automated asset transfers utilized identical fixed fee rates and uniform transaction behaviors, allowing analysts to trace the attacker’s activity across Bitcoin UTXO history and map multiple rounds of coordinated theft.