Alex Thorn, Head of Research at Galaxy Research, said late Sunday that hackers may be launching a fourth coordinated attack on the compromised cryptocurrency wallet Coldcard, which has already seen around 1,367 Bitcoin (CRYPTO: BTC) drained.
Hackers Target Cold Wallet Thorn alerted on X that a fresh wave of attacks has pilfered 388.93 BTC, worth $24.53 million at prevailing prices, from 462 addresses in 218 transactions.
He urges users to move funds off the Coldcard wallet immediately, using high transaction fees to prioritize their rescue transaction ahead of the hacker’s.
THESE TXS ARE PENDING IN THE MEMPOOL WITH RBF OPT-IN AND APPEAR TO BE SIPHONS BY A COORDINATED "4TH WAVE" ATTACK ON COLDCARD USERSIF YOUR ADDRESS IS IN THIS LIST YOU HAVE ONLY MINUTES TO ENGAGE IN A FEE RACE TO BEAT THE ATTACKER AND SECURE YOUR FUNDS https://t.co/nekSYMbSMj— Alex Thorn (@intangiblecoins) August 3, 2026 A dashboard tracking the exploit estimates that 1,367.59 BTC—worth $86.62 million at current prices—has already been drained from wallets linked to Coldcard. vibe coded a live dashboard to track drained BTC from coldcards🔎 https://t.co/FYM6Unodu1— bradynoah (@bradytc_) July 31, 2026 Coldcard Takes Mitigatory Steps Coldcard confirmed the vulnerability and said it has halted shipments.
