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Have you lost the passphrase for an hardware wallet and looking how to recover your coins? Here is how the KeychainX recovery experts have done just that for a client. This is a trusted service provider that specializes in recovering lost crypto wallets and they can even recover funds from broken hardware drives, phones or Trezor/Ledger wallets.
Recovering a Trezor Wallet Passphrase
A TREZOR hardware wallet is a security device that protects the user from key loggers and phishing e-mail, keeping the user’s Bitcoin and crypto safe. Various hacking groups could open the device by mitigating side-channel attacks; however, the method was only possible because ‘a passphrase was not used’. When making a transaction, the user only enters a PIN and therefore protects the private key of the Bitcoin. The only backup is a 12/24-word mnemonic that determines which addresses are stored on the device.
Recently, a client asked the KeyChainX team to brute force their TREZOR wallet as the client had forgotten the passphrase, commonly known as the 25th word. The passphrase was designed to ensure funds are safe if a user loses their TREZOR and someone gets hold of their 24-word mnemonic. The passphrase can be a word, a number, or a string of random characters. The idea behind it is to deceive the thief into believing that once he opens someone’s TREZOR or recovers it with the 24 words, he will only find a “fake” or low-value amount of BTC. This specific client had 10 USD worth of Bitcoin stored on their TREZOR’s main wallet based on the 24 words, but the real treasure trove was a wallet hidden behind his passphrase, the value the team cannot disclose.
The KeyChainX team split the job into two phrases (or three). But before the team could start, the client wanted to meet face-to-face. As travelling to South America was out of the question as we had a security presentation scheduled in Europe, the client agreed to a Skype “interview”. After 2 hours, the team convinced him that the team would not run away with his funds.
How Did the Team Crack It Open and Brute Force It?
The first part is data sourcing. First, the team gathered information about the possible hints to the passphrase, as a six characters passphrase would take forever to brute force with conventional tools. For example, a GITHUB repo by the user gurnec has a tool called Btcrecover that brute forces a couple of hundred passwords per second on average. For example, to break a…
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