1. use john the ripper on electrum, Week 3: Introduction to John the Ripper


    Hackers have launched a denial-of-service (DoS) attack on a well-known wallet Electrum server, according to Johnwick.io. Hackers used a botnet of more than 140,000 computers to attack Electrum's nodes and simultaneously deployed malicious nodes. When a user connects to these malicious nodes and sends a transaction using an older version of Electrum, the user is prompted to update the Backdoor Client. If the user installs the client as prompted, the private key is stolen and all digital assets are lost. Millions of dollars of digital currency have been stolen, according to Electrum officials. Devi Security Labs recommends that users of Electrum Wallet update to the latest version of the client via the official website and never use the link in the prompt message.

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    According to the Dimensionality Reduction Security Lab, users of Bitcoin wallet Electrum are currently facing phishing attacks. The hacker broadcasts a message to the Electrum client through a malicious server, prompting the user to update to v4.0.0. If the user installs this "backdoor client" as prompted, the private key will be stolen and all digital assets will be stolen

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    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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    In addition, Gate.io will release GateChainTestnet 4.0 in May 2020, including Bug Corrections to Testnet 3.0, Performance Optimization, PoS Mining Parameter Tuning, GT, GC Dual Currency Mortgage, etc., for final stability testing. Mainnet 1.0 will be released after Testnet 4.0 and will be released no later than 2020 Q2. For more information, please click on the original link.

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    This isn't the first time Thatectrum has appeared in a fake version, with hackers developing a fake encrypted wallet, Electrum, in December, resulting in the theft of nearly 250 bitcoins worth about $1 million. In January, GitHub discovered a fake Electrum wallet called "Electrvm" designed to steal users' money. In February, users of encrypted wallets Electrum and MyEtherWallet reported that they were facing phishing attacks.