According to security firm Slow Fog, the current latest version of Bitcoin Light Wallet Electrum is 3.3.8, while previous versions of 3.3.4 are known to have "message defects" that allow attackers to send "update prompts" over a malicious ElectrumX server. This "update tip" is very confusing to the user, and if you follow the prompt to download the so-called new version of Electrum, you may be tricked. User feedback because of this attack, stolen bitcoins in more than four digits.
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As a service provider, Electrum charges a transaction fee to send Bitcoin. Default fee: 0.2 mBTC fixed rate. (In some cases, the rate can be as low as 0.1 mBTC)
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Dynamic . . . Electrum wallet attacked nearly 250 bitcoins were stolen.
On December 27, Reddit user u/normal_rc reported that Electrum's wallet had been hacked and that nearly 250 bitcoins (243.6 BTCs, nearly $1 million) had been maliciously stolen, coinelegraph reported. Electrum then confirmed that the attack included creating a fake version of the wallet to trick users into providing password information. Electrum responded on Twitter that "this is a persistent phishing attack on Electrum users" and warned users not to download Electrum from any source other than the official website.
This "update tip" is not an official act of Electrum, but a phishing attack by an attacker that exploits a message flaw on the Electrum client and the ElectrumX server, which requires the attacker to deploy the malicious ElectrumX server in advance, and the malicious server is localized by the user's Electrum client (because the Electrum client is a light wallet and the user needs the ElectrumX server to broadcast the transaction). At the time of the madness, malicious ElectrumX servers accounted for as many as 71% of the total, and the show doesn't fully count that hundreds of bitcoins have been stolen in this phishing attack over the past year or so.
Down-to-dimensional security: Bitcoin wallet Electrum was hacked and at least 1,450 BTCs were stolen.
In a forum post on Bitcointalk, website administrator Theymos explained: "If at any time in the past you've logged in to Electrum without a wallet password and opened a web page, your wallet might have been stolen." Particularly paranoid people may want to send all bitcoins (BTCs) from their old Electrum wallets to the newly generated Electrum wallet. "
By default, electrum wallets are randomly connected to a set of Electrum servers. From a privacy perspective, this is not a good thing because it discloses your wallet address and balance to unknown third parties. And unfortunately, many public Electrum servers are run by individuals or groups of blockchain analytics companies or worse. Therefore, if you are using an Electrum wallet, it is generally recommended that you run your own Electrum server and then connect the wallet to that server.
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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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As mentioned earlier, because electrum light wallets are different from Bitcoin light wallets such as MultiBit or Breadwallet, they cannot communicate directly with bitcoin full nodes and can only communicate with electrum.
The UB team has now developed Core, Core-QT, Electrum Wallet (where Electrum is a lightweight wallet that supports multiple signatures) and released a complete blockchain browser. More than 18 trading platforms around the world support UBTC trading.