Coldcard Hacker Wallet Becomes "Blockchain Message Wall," Holding Over $36 Million in Stolen BTC

TechFlow news, August 5: According to CoinDesk, since the Coldcard hardware wallet vulnerability incident emerged on July 30, the wallet address associated with the hacker (bc1qq85v2c926eg6pgxhwp6q7lf6cnsz80qs3fcu9r) has received multiple Bitcoin transfers with attached text messages. The wallet currently holds approximately $36 million in stolen assets, and the confirmed losses from this incident have exceeded $100 million.

The aforementioned information was recorded on-chain via Bitcoin's OP_RETURN function and permanently stored on the blockchain. The content includes victims pleading for restitution (such as "You stole, please return some", "Return 80% of my 5 BTC"), solicitations for money laundering services ("I launder BTC, 10% commission", with Telegram contact information), and even fundraising requests completely unrelated to the incident, varying widely in nature.