Bitcoin mixers are websites that allow users to send Bitcoin from one address to another by breaking the funds in small sums and transferring them through thousands of intermediary addresses before re-joining the funds at the destination address. By replacing the destination address at the HTTP traffic level, the attackers effectively hijacked the user's funds without the users or the Bitcoin mixer's knowledge.
Nusenu said that based on the contact email address used for the malicious servers, they tracked at least nine different malicious Tor exit relay clusters, added across the past seven months. The researcher said the malicious network peaked at servers on May 22, when Nusenu said he's been reporting the malicious exit relays to Tor admins since May, and after the latest takedown on June 21, the threat actor's capabilities have been severely reduced.
The researcher suggested that the threat actor is likely to continue their attack as the Tor Project does not have a thorough vetting process in place for entities who can join its network. While anonymity is a core feature of the Tor network, the researcher argues that better vetting can be put in place for at least exit relay operators.
A somewhat similar attack like this one took place in ; however, it did not target Tor exit relays, but Tor-to-web Tor2Web proxies -- web portals on the public internet that allow users to access.
At the time, US security firm Proofpoint reported that at least one Tor-to-web proxy operator was silently replacing Bitcoin addresses for users accessing ransomware payment portals intending to pay ransom demands -- effectively hijacking the payment and leaving the victims without a decryption key, even if they paid the ransom. Missouri apologizes to k teachers who had SSNs and private info exposed.
Brazil advances efforts to tackle electronic fraud. Cybersecurity education company touts 3 to 6 month program for unemployed veterans. Want to be as secure and private as possible online? You've heard of Tor and you've heard of VPNsbut can you use them together? He enjoys copious amounts of tea, board games, and football. According to Nusenu, the goal of the malicious actors hasn't changed. Share Share Tweet Email.
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