Hackers target Bitcoin wallet worth billions of dollars stolen from Mt. Gox Hackers have targeted an old Bitcoin address (starting with 1FeexV) containing over $8 billion worth of digital currency stolen from the bankrupt Mt. Gox exchange. According to BitMEX Research, attackers sent a transaction containing a phishing website link to the address using Bitcoin's OP-RETURN function. Although OP-RETURN can store information on the blockchain, it is used to embed malicious text and lure owners to access fake pages. The page falsely claimed that the wallet was "lost or abandoned" and impersonated the closed Wall Street investment bank Solomon Brothers, attempting to obtain the owner's personal information. BitMEX warns that this website is illegal and part of a Bitcoin scam, and multiple old addresses from 2011 have become targets of similar attacks.