Key facts
- 333 Tor exit nodes were hijacked.
- SSH traffic was redirected to 12 attacker-controlled servers.
Hackers hijacked 333 Tor exit nodes between October 2 and October 5, reconfiguring them to intercept unencrypted email and redirect SSH traffic to attacker-controlled servers. The compromise began in late August with the exploitation of a reused password on a Tor management server, allowing the attackers to install a Linux backdoor known as Ebury.

The hijacking of Tor exit nodes poses a significant risk to user privacy and security by enabling the interception of sensitive data, including plaintext emails and SSH credentials, potentially compromising communications and systems.
Unknown attackers hijacked over 300 Tor exit nodes, beginning in late August by exploiting a reused password on a Tor management server to install a Linux backdoor called Ebury. The attackers gained administrative control of a Tor server named Switzerland2 and reconfigured its exit nodes. This campaign, which occurred from October 2 to October 5, involved 333 exit relays. SSH traffic was redirected to 12 attacker-controlled servers, and ports used for encrypted email were blocked while allowing unencrypted email traffic.
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