Part Of Seed Phrase Can Cause A Crypto Wallet Hack

The rather popular crypto investor Alistair Milne voluntarily lost 1 BTC during a hacker attack he initiated himself. Milne wanted to check how much confidential data of the wallet would be enough to break it.

Woke up to some 'bad' news this morning. The 1BTC wallet has been brute forced, which is pretty impressive. They must have rented several GPUs to do it so quickly!

I knew I was against the clock but most people thought it would take a few weeks to brute force 4 seed words pic.twitter.com/uAoLyQkhRJ

— Alistair Milne (@alistairmilne) June 17, 2020

Separate wallet

At the end of last month, the investor created a separate wallet and transferred one bitcoin on it. After that, he began to lay out clues to his private key, through which everyone could guess the secret seed phrase.

Hacker`s move

From the very beginning, the investor planned to publish the last 3-4 words in the public domain right away, but the hacker got ahead of him. Using the brute-force method, an anonymous hacker picked up a seed phrase in just 44 hours.

The unknown paid a higher fee of 0.01 BTC (about 94 US dollars) to withdraw the funds from the wallet. Most likely he was afraid that someone might get ahead of him.

Took the 'hacker' just 44 hours to brute force. They paid a huge miner fee (0.01BTC!) so were worried about others doing the same and felt under pressure

— Alistair Milne (@alistairmilne) June 17, 2020

Hacker`s lightning reaction

Alistair Milne admitted the speed of hacking surprised him, he believed that the selection of 4 words through a brute-force attack should have taken several weeks. He suggested that the hacker used leased facilities to speed up the process.

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