Bitcoin wallet service Electrum is facing an ongoing Denial-of-Service attack on its servers

Bitcoin (BTCwallet service Electrum is facing an ongoing Denial-of-Service (DoS) attack on its servers, the company reported on Twitter on April 7.

According to tech news website The Next Web, the new attack has caused users to lose estimatedly millions of dollars to date, with a single person alone reportedly losing about $140,000.

The ongoing DoS attack was allegedly launched by a malicious botnet of more than 140,000 machines, and aims to steal users’ Bitcoin by referring them to fake versions of Electrum software. Citing an unnamed security researcher, the article says that the recent DoS attack is deployed on a new level and was launched about a week ago.

According to The Next Web, the attackers have even implemented their own Electrum servers hosting compromised Electrum versions in order to realize the hack. After users sync their vulnerable Electrum wallet with a malicious server, they are directed to “update” their client with a hacked version, which eventually leads to an immediate loss of funds that were contained in the old versions, the report explains.

Thomas Voegtlin, lead Electrum developer, reportedly said that the firm expects to resolve the matter in the coming hours or days. He stressed that users that are at the highest risk are those who downloaded Electrum a long time ago and have not updated the software since then.

Accordingly, Electrum’s website says that the software versions older than 3.3 can no longer connect to public servers and must be upgraded, which is a measure to prevent user exposure to phishing messages. The website also urges users to not download Electrum software from any other source than

In the recent announcement on Twitter, Electrum recommended its users to disable the auto-connect option and select their server manually, while the company is working on a more robust version of the Electrum server in order to fix the issue.

Also read: World Economic Forum released a report about Blockchain cybersecurity