{"id":183976,"date":"2026-10-23T23:40:30","date_gmt":"2026-10-23T21:40:31","guid":{"rendered":"https:\/\/prohoster.info\/blog\/news\/okolo-10-vyhodnyh-uzlov-tor-byli-vovlecheny-v-ataku-po-perehvatu-ssh-podklyuchenij"},"modified":"2026-10-23T23:40:35","modified_gmt":"2026-10-23T21:40:35","slug":"around-10-percent-of-tor-exit-nodes-were-involved-in-an-ssh-connection-hijacking-attack","status":"publish","type":"post","link":"https:\/\/prohoster.info\/pt\/blog\/news\/around-10-percent-of-tor-exit-nodes-were-involved-in-an-ssh-connection-hijacking-attack","title":{"rendered":"Cerca de 10% dos n\u00f3s de sa\u00edda do Tor estavam envolvidos em um ataque de intercepta\u00e7\u00e3o de conex\u00f5es SSH","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"

Foram publicados os detalhes do incidente em que criminosos conseguiram obter controle sobre 333 n\u00f3s de sa\u00edda da rede Tor (existem cerca de 3000 n\u00f3s de sa\u00edda no total) e organizaram a intercepta\u00e7\u00e3o de tr\u00e1fego n\u00e3o criptografado e o redirecionamento de conex\u00f5es SSH. O ataque come\u00e7ou em 2 de outubro (na noite de sexta-feira), mas foi identificado e come\u00e7ou a ser bloqueado em 4 de outubro. Em 5 de outubro, todos os servidores comprometidos foram desconectados pelos operadores ou pelos pr\u00f3prios atacantes. A investiga\u00e7\u00e3o revelou que os atacantes tiveram acesso aos servidores dois meses antes do in\u00edcio do ataque aos usu\u00e1rios do Tor e instalaram o malware Ebury 1.8.3 nos sistemas comprometidos.<\/p>\n

O objetivo do ataque era interceptar senhas, chaves e informa\u00e7\u00f5es confidenciais no tr\u00e1fego n\u00e3o criptografado em tr\u00e2nsito, bem como capturar senhas para SSH. Ao analisar o tr\u00e1fego n\u00e3o criptografado, os atacantes se concentraram em solicita\u00e7\u00f5es n\u00e3o criptografadas aos servidores de e-mail. Para incentivar o retorno \u00e0 opera\u00e7\u00e3o sem criptografia nos n\u00f3s de sa\u00edda, foram bloqueadas as portas de rede utilizadas para estabelecer um canal de comunica\u00e7\u00e3o criptografado com os servidores de e-mail. servidores<\/a>. O tr\u00e1fego n\u00e3o criptografado foi analisado em tempo real.<\/p>\n

Para coleta de senhas de SSH, foi organizado o redirecionamento de solicita\u00e7\u00f5es SSH para um dos 12 servidores dos criminosos. Esses servidores aceitavam a conex\u00e3o via SSH e apresentavam a solicita\u00e7\u00e3o de senha em nome servidor<\/a>, ao qual a conex\u00e3o estava sendo feita. Como as chaves do host n\u00e3o coincidiam, o ssh do lado cliente emitia um aviso sobre a conex\u00e3o com um desconhecido. servidor<\/a>. <\/p>\n

Se o usu\u00e1rio ignorasse este aviso e digitasse a senha para se conectar, o malicioso servidor<\/a> transmitia a conex\u00e3o para o leg\u00edtimo servidor SSH alvo, preservando a senha digitada pela v\u00edtima e interceptando informa\u00e7\u00f5es sobre as a\u00e7\u00f5es na sess\u00e3o SSH. Paralelamente, estabelecia-se uma conex\u00e3o com o servidor alvo utilizando a senha capturada e instalava-se o malware Ebury nele. Ao obter controle sobre servidores Linux que n\u00e3o eram n\u00f3s de sa\u00edda do Tor, os atacantes alteravam as configura\u00e7\u00f5es no arquivo torrc e transformavam-nos em novos n\u00f3s de sa\u00edda maliciosos do Tor.<\/p>\n

<\/center><\/p>\n

Para identificar todos os n\u00f3s de sa\u00edda maliciosos, o pesquisador que descobriu o problema utilizou a ferramenta exitmap para percorrer todos os n\u00f3s de sa\u00edda, estabelecer uma conex\u00e3o SSH atrav\u00e9s de cada um deles e verificar o redirecionamento da solicita\u00e7\u00e3o. Como exatamente os atacantes conseguiram acessar os n\u00f3s Tor comprometidos ainda n\u00e3o est\u00e1 claro, e entre outras coisas, surgem
\n suspeitas sobre a comprometimento dos operadores de hospedagem.
\n
Fonte: opennet.ru<\/a> <\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"

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\u0431\u044b\u043b\u0438 \u043e\u0442\u043a\u043b\u044e\u0447\u0435\u043d\u044b […]<\/p>\n","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"author":10,"featured_media":183978,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[702],"tags":[],"class_list":["post-183976","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-news"],"aioseo_notices":[],"aioseo_head":"\n\t\t\n\t\n\t\n\t\n\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\n","aioseo_head_json":{"title":"\ud83e\udd47Cerca de 10% dos n\u00f3s de sa\u00edda do Tor estiveram envolvidos em um ataque de intercepta\u00e7\u00e3o de conex\u00f5es SSH | ProHoster","description":"Foram publicados detalhes do incidente, no qual os criminosos conseguiram assumir o controle de 333 n\u00f3s de sa\u00edda da rede Tor (existem cerca de 3000 n\u00f3s de sa\u00edda no total no Tor) e realizar a intercepta\u00e7\u00e3o do tr\u00e1fego n\u00e3o criptografado.","canonical_url":"https:\/\/prohoster.info\/pt\/blog\/news\/around-10-percent-of-tor-exit-nodes-were-involved-in-an-ssh-connection-hijacking-attack","robots":"max-image-preview:large","keywords":"","webmasterTools":{"miscellaneous":""},"schema":null,"og:locale":"pt_PT","og:site_name":"ProHoster | \u041a\u0443\u043f\u0438\u0442\u044c \u043d\u0430\u0434\u0435\u0436\u043d\u044b\u0439 \u0445\u043e\u0441\u0442\u0438\u043d\u0433 \u0434\u043b\u044f \u0441\u0430\u0439\u0442\u043e\u0432 \u0441 \u0437\u0430\u0449\u0438\u0442\u043e\u0439 \u043e\u0442 DDoS, VPS VDS \u0441\u0435\u0440\u0432\u0435\u0440\u044b","og:type":"article","og:title":"\ud83e\udd47\u041e\u043a\u043e\u043b\u043e 10% \u0432\u044b\u0445\u043e\u0434\u043d\u044b\u0445 \u0443\u0437\u043b\u043e\u0432 Tor \u0431\u044b\u043b\u0438 \u0432\u043e\u0432\u043b\u0435\u0447\u0435\u043d\u044b \u0432 \u0430\u0442\u0430\u043a\u0443 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