{"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\/da\/blog\/news\/around-10-percent-of-tor-exit-nodes-were-involved-in-an-ssh-connection-hijacking-attack","title":{"rendered":"Omkring 10% af de udg\u00e5ende Tor-noder var involveret i et angreb p\u00e5 SSH-forbindelser","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"

Detaljerne om h\u00e6ndelsen er blevet offentliggjort, hvor kriminelle har f\u00e5et kontrol over 333 udgangsnoder i Tor-netv\u00e6rket (der er i alt omkring 3000 udgangsnoder i Tor) og har organiseret opsnapning af ukrypteret trafik samt omdirigering af SSH-forbindelser. Angrebet begyndte den 2. oktober (fredag aften), men blev opdaget og begyndte at blive blokeret den 4. oktober. Den 5. oktober blev alle kompromitterede servere lukket af operat\u00f8rerne eller af angriberne selv. Efterforskningen viste, at angriberne havde f\u00e5et adgang til serverne to m\u00e5neder f\u00f8r angrebet p\u00e5 Tor-brugerne og havde installeret malware Ebury 1.8.3 p\u00e5 de kompromitterede systemer.<\/p>\n

M\u00e5let med angrebet var at opsnappe adgangskoder, n\u00f8gler og fortrolige oplysninger i den uenkrypterede trafik under transit samt at f\u00e5 adgang til SSH-adgangskoder. Ved analysen af den ukrypterede trafik fokuserede angriberne p\u00e5 ukrypterede foresp\u00f8rgsler til mailservere. For at stimulere en tilbagevenden til at arbejde uden kryptering p\u00e5 udgangsnoderne blev der blokkeret netv\u00e6rksporte, der blev brugt til at organisere en krypteret kommunikationskanal med mailserverne. servere<\/a>Den ukrypterede trafik blev analyseret on-the-fly.<\/p>\n

For at samle SSH-adgangskoder blev der organiseret omdirigering af SSH-foresp\u00f8rgsler til en af de 12 servere under angriberes kontrol. Disse servere modtog forbindelser via SSH og viste en adgangskodeforesp\u00f8rgsel p\u00e5 vegne af server<\/a>, som der blev tilsluttet til. Da v\u00e6rtsn\u00f8glerne ikke stemte overens, gav ssh p\u00e5 klientsiden en advarsel om forbindelse til en ukendt server<\/a>. <\/p>\n

Hvis brugeren ignorerede denne advarsel og indtastede adgangskoden for at oprette forbindelse, s\u00e5 transmitterede den onde server<\/a> forbindelsen til den legitime m\u00e5l-SSH-server, gemte den indtastede adgangskode fra ofret og opsnappede information om handlinger i SSH-sessionen. Samtidig blev der oprettet forbindelse til m\u00e5lserveren med den opsagte adgangskode, og der blev installeret malware Ebury p\u00e5 den. Ved at f\u00e5 kontrol over Linux-servere, der ikke var Tor-udgangsnoder, \u00e6ndrede angriberne indstillingerne i torrc-filen og omdannede dem til nye ondsindede Tor-udgangsnoder.<\/p>\n

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

For at identificere alle ondsindede udg\u00e5ende noder, anvendte den forsker, der opdagede problemet, v\u00e6rkt\u00f8jet exitmap til at gennemg\u00e5 alle udg\u00e5ende noder, oprette SSH-forbindelse gennem hver af dem og kontrollere for omdirigering af anmodningen. Hvordan angriberne fik adgang til de kompromitterede Tor-noder er stadig uklart, blandt andet n\u00e6vnes
\n formodninger om kompromittering af hostingoperat\u00f8rer.
\n
Kilde: 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\udd47Cirka 10% af Tor-udg\u00e5ende noder var involveret i angrebet p\u00e5 opsnapning af SSH-forbindelser | ProHoster","description":"Detaljer om h\u00e6ndelsen er blevet offentliggjort, hvor kriminelle form\u00e5ede at f\u00e5 kontrol over 333 udg\u00e5ende noder i Tor-netv\u00e6rket (der er omkring 3000 udg\u00e5ende noder i alt i Tor) og organisere opsnapning af ukrypteret trafik.","canonical_url":"https:\/\/prohoster.info\/da\/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":"da_DK","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 \u043f\u043e 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