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Users of Bitcoin wallet Electrum are facing phishing attacks, according to Johnwick.io. Hackers broadcast messages to the Electrum client through a malicious server, prompting the user to update to v4.0.0, and if the user follows the prompt to install this "backdoor-carrying client", the private key is stolen and all digital assets are stolen. At the time of writing, at least 1,450 BTCs worth about $11.6 million had been stolen from phishing attacks that faked Electrum upgrade tips. DeViable Security Labs hereby suggests that versions of Electrum below 3.3.4 are vulnerable to such phishing attacks, and users using Electrum Wallet are requested to update to the latest version of Electrum 3.3.8 via the official website (electrum.org), which has not yet been officially released, and do not use the link in the prompt to avoid asset losses.

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According to Johnwick.io, we will continue to monitor and track the further flow of funds after a recent user submitted a coin-losing incident claiming that the download used an Electrum wallet had been phishing and that more than 700 bitcoins had been lost, and that the stolen address had been added to the Devi AML system. It is reported that malicious websites (electrumsecure) fake Electrum website phishing attacks, to guide users to download and use the wallet, in order to steal the user's private key and other sensitive data. Devi Security Labs is here to remind users not to install unknown sources of Electrum wallets, to avoid asset losses. Electrum Official Website: electrum.org Electrum Phishing Website: electrumsecure.

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The Electrum team has announced the attack in an official tweet, saying that "this is an ongoing phishing attack on Electrum users" and reminding them to check the authenticity of the client's source before logging in. The team published its official website, and the Electrum clients downloaded elsewhere may be problematic.

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After installation, open Electrum, and create a new wallet, Follow the steps from Figure 4 to Figure 8 to generate a new cold wallet address, electrum by default is to create 5 new addresses at a time, note Figure 8, type "listaddressese()" command on the command line, the system will list the newly created 5 Bitcoin addresses, then use the getbukeys command, or get the public key from the menu master key public (the public key and address are not the same concept Oh), please copy this public key down, and save it in a text file. Figure 9 is the private key showing these 5 new addresses, put here just to explain to you, used to compare with Figure 12, 5 private keys are in this never touch the net linux operating system wallet, we do not actually do Figure 9 this step. And don't tell anyone else your private key.

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The advantage of wallet-based anonymous solutions, such as Wasabi, Samourai, or Breze, is that they can be built on the basis of Bitcoin (or other currencies) without changing the underlying protocol. The disadvantage is that if a match is not found in a relatively short period of time, there will be a small anonymous set and transaction delay. For example, Staggered Ricochet, Samourai's staggered bounce, can take up to two hours to reach the receiver. In addition, wallet rules for centralized platforms are anonymous. In early 2019, Google asked Samourai to remove some of the privacy and security features from its app because it violated new rules for Google App Markety.

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Electrum is a popular software wallet that works by connecting to a dedicated server. These servers receive a hash of the Bitcoin address in the wallet and reply with transaction information. Electrum Wallet is fast and has few resources, but by default, it connects to these servers and can easily monitor users. In addition to Electrum, some other software uses public Electrum servers. By 2019, it is a faster and better alternative to BIP37.