A bitcoin wallet Electrum has faced DoS-attack for about a week already, which is rumoured to cause huge losses of users' funds. In fact, the company spokesperson has already confirmed that its servers were under DoS attack, though there were no comments regarding the possible amount of losses.
Electrum announced on its Twitter a few days ago:
"Electrum servers are currently under a DoS attack. We are working on a more robust version of the electrum server. In the meantime, affected users should disable auto-connect, and select their server manually."
According to reports, the wallet's servers have been attacked by about 140,000 machines that redirect users to a fake version of the software striving to stole their money. After passing to the compromised website they get a proposal to update a fresh version of the software – they lose cryptos while installing the update.
As the cybersecurity expert noted that the attack was launched about a week ago, and performed at brand-new level. Users have recorded up to 25 Gb per second traffic injected into Electrum servers.
There is official detail about the possible material damage from the attack, though some players believe that the exchange has already lost millions of dollars. For example, there are reports that one of the users have cryptos worth $140,000 in total.
Later, a representative of Electrum's development team said that they go to great lengths to cope with the current problem. In particular, the wallet is working on more effective server. Notably, it was noted that the users that run old wallet versions are in the high-risk area.
"Users of old Electrum versions (<= 3.3.2) are exposed to a phishing attack, where malicious servers ask them to download malware. In order to reach these users, we have deployed a white hat attack that uses the same vulnerability, and directs them to http://electrum(dot)org," warned the company.