Coldcard Wallet Hackers Swipe Over $130M in Bitcoin

A major security breach has affected Coldcard hardware wallets, resulting in over $130 million worth of Bitcoin stolen through firmware vulnerability.

The hack exploits a weakness introduced in March 2021 that compromises seed phrase generation randomness on impacted devices.

At least three distinct attack campaigns have been identified, with a potential fourth wave underway. The attackers used brute force methods to crack wallets without requiring physical device access.

As a result of the breach, Bitcoin active addresses surged to 980,000 daily transactions in July, primarily driven by security concerns rather than market sentiment.