In short
The Coldcard exploit is ongoing, with Galaxy Analysis now monitoring about $88.6 million stolen throughout 4,585 addresses in three waves.
Galaxy’s Alex Thorn described the sweeps as deliberate and certain LLM-orchestrated, warning that each single-sig Coldcard handle created after the March 2021 firmware flaw will finally be drained.
The breach has spurred an uncommon reversal of the “not your keys, not your cash” ethos as customers transfer Bitcoin again to exchanges.
The theft of Bitcoin from compromised Coldcard {hardware} wallets remains to be underway, with researchers now monitoring losses of roughly $88 million and warning that each weak system will finally be emptied.
Galaxy Analysis mentioned Saturday it has recognized a 3rd wave of thefts, during which 207.73 BTC was drained, lifting its noticed tally to about 1,367 BTC—round $88.6 million—throughout 4,585 addresses. The agency referred to as the exploit ongoing and urged anybody holding single-signature funds on a Coldcard to maneuver them directly. Galaxy mentioned it has flagged roughly 600 suspected attacker addresses to federal investigators, compliance corporations and cross-industry cyber investigators, crediting victims who shared transaction particulars for serving to map the on-chain patterns.
“I proceed to research and add new Coldcard sufferer and attacker addresses to our investigation database,” Galaxy’s head of analysis Alex Thorn posted to X. “The assault is ongoing—transfer your funds off Coldcard-generated addresses instantly if in case you have not accomplished so.”
The flaw, as Decrypt beforehand reported, stems from a March 2021 firmware construct error on Coinkite’s units that prompted seed phrases to be generated with far too little randomness, leaving personal keys guessable. Thorn wrote that the sweeps look deliberate and programmatic, in all probability orchestrated with a big language mannequin, and cautioned that each single-sig Coldcard handle created after that 2021 replace will finally be drained, saying it’s only a matter of time.
Thorn famous the stolen cash had sat untouched for years earlier than being taken—a mean dormancy of three.18 years—underscoring that the victims had been long-term holders. The funds from the three documented waves stay parked in attacker addresses and haven’t moved.
The fallout has pushed a panicked response from affected customers, with safety consultants urging warning when transferring funds to new addresses. Lots of the affected customers are racing to maneuver Bitcoin off self-custody and again onto centralized crypto exchanges, equivalent to Coinbase or Binance, or freshly generated addresses—an inversion of the {industry}’s ordinary “not your keys, not your cash” ethos.
For some, the warnings got here too late. Canadian coach Jonathan Goodman mentioned in a put up on X that 18.25 BTC, value about $1.6 million Canadian, was swept from his wallets in a seven-minute span on July 29, regardless of his keys sitting in a security deposit field that by no means touched the web. “Maybe the toughest half about that is that I did all the things proper,” he wrote, including that he’s submitting reviews with police and the Ontario Securities Fee.
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