An anonymous reader quotes a report from Bleeping Computer: An unknown hacker has used a vulnerability in an Ethereum wallet client to steal over 153,000 Ether, worth over $30 million dollars. The hack was possible due to a flaw in the Parity Ethereum client. The vulnerability allowed the hacker to exfiltrate funds from multi-sig wallets created with Parity clients 1.5 and later. Parity 1.5 was released on January 19, 2017. The attack took place around 19:00-20:00 UTC and was immediately spotted by Parity, a company founded by Gavin Wood, Ethereum's founder. The company issued a security alert on its blog. The Ether stolen from Parity multi-sig accounts was transferred into this Ethereum wallet, currently holding 153,017.021336727 Ether. Because Parity spotted the attack in time, a group named "The White Hat Group" used the same vulnerability to drain the rest of Ether stored in other Parity wallets that have not yet been stolen by the hacker. This money now resides in this Ethereum wallet. According to messages posted on Reddit and in a Gitter chat, The White Hat Group appears to be formed of security researchers and members of the Ethereum Project that have taken it into their own hands to secure funds in vulnerable wallets. Based on a message the group posted online, they plan to return the funds they took. Their wallet currently holds 377,116.819319439311671493 Ether, which is over $76 million.