Suspected 4th Coldcard attack wave sweeps 389 Bitcoin: Galaxy’s Thorn

Galaxy research head Alex Thorn warned that unconfirmed transactions may give some Coldcard users a narrow opportunity to save their funds.

Coldcard users are being warned of a new wave of coordinated thefts targeting their Bitcoin hardware wallets, coming just days after the first wave of attacks on Thursday.

In an X post on Monday, Galaxy research head Alex Thorn flagged 218 transactions impacting 462 potential victim addresses in the last few hours, moving around 388.9 Bitcoin (BTC).

Thorn said the activity averaged 13.8 sweeps per block, around 45 times the rate observed in a pre-incident control window. Most transfers have seen a fresh destination created for each victim rather than converging on a central collection wallet.

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