{"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\/cs\/blog\/news\/around-10-percent-of-tor-exit-nodes-were-involved-in-an-ssh-connection-hijacking-attack","title":{"rendered":"P\u0159ibli\u017en\u011b 10 % v\u00fdstupn\u00edch uzl\u016f Tor bylo zapojeno do \u00fatoku na zachycen\u00ed p\u0159ipojen\u00ed SSH.","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"

Byly zve\u0159ejn\u011bny podrobnosti o incidentu, b\u011bhem kter\u00e9ho se \u00fato\u010dn\u00edk\u016fm poda\u0159ilo z\u00edskat kontrolu nad 333 v\u00fdstupn\u00edmi uzly s\u00edt\u011b Tor (celkem je v Tor p\u0159ibli\u017en\u011b 3000 v\u00fdstupn\u00edch uzl\u016f) a zorganizovat na nich odchyt ne\u0161ifrovan\u00e9ho provozu a p\u0159esm\u011brov\u00e1n\u00ed SSH spojen\u00ed. \u00datok za\u010dal 2. \u0159\u00edjna (v p\u00e1tek ve\u010der), ale byl odhalen a za\u010dal b\u00fdt blokov\u00e1n 4. \u0159\u00edjna. 5. \u0159\u00edjna byly v\u0161echny kompromitovan\u00e9 servery odpojeny oper\u00e1tory nebo samotn\u00fdmi \u00fato\u010dn\u00edky. Vy\u0161et\u0159ov\u00e1n\u00ed uk\u00e1zalo, \u017ee \u00fato\u010dn\u00edci z\u00edskali p\u0159\u00edstup k server\u016fm dva m\u011bs\u00edce p\u0159ed za\u010d\u00e1tkem \u00fatoku na u\u017eivatele Tor a nainstalovali do kompromitovan\u00fdch syst\u00e9m\u016f malware Ebury 1.8.3.<\/p>\n

C\u00edlem \u00fatoku byl odchyt hesel, kl\u00ed\u010d\u016f a d\u016fv\u011brn\u00fdch informac\u00ed v p\u0159echodov\u00e9m ne\u0161ifrovan\u00e9m provozu, stejn\u011b jako zachycen\u00ed hesel pro SSH. P\u0159i anal\u00fdze ne\u0161ifrovan\u00e9ho provozu se \u00fato\u010dn\u00edci zam\u011b\u0159ili na ne\u0161ifrovan\u00e9 \u017e\u00e1dosti k po\u0161tovn\u00edm server\u016fm. Pro stimulaci n\u00e1vratu k ne\u0161ifrovan\u00e9 pr\u00e1ci na v\u00fdstupn\u00edch uzlech bylo zablokov\u00e1no s\u00ed\u0165ov\u00e9 porty, pou\u017e\u00edvan\u00e9 k organizaci \u0161ifrovan\u00e9ho kan\u00e1lu komunikace s po\u0161tovn\u00edmi servery<\/a>. Ne\u0161ifrovan\u00fd provoz byl analyzov\u00e1n za b\u011bhu.<\/p>\n

Pro shroma\u017e\u010fov\u00e1n\u00ed hesel k SSH bylo uspo\u0159\u00e1d\u00e1no p\u0159esm\u011brov\u00e1n\u00ed SSH dotaz\u016f na jeden z 12 server\u016f \u00fato\u010dn\u00edk\u016f. Tyto servery p\u0159ij\u00edmaly spojen\u00ed po SSH a v\u00fdstupn\u00ed dotaz na heslo jm\u00e9nem serveru<\/a>, ke kter\u00e9mu se p\u0159ipojovalo. Vzhledem k tomu, \u017ee hostitelsk\u00e9 kl\u00ed\u010de se neshodovaly, ssh na stran\u011b klienta vydalo varov\u00e1n\u00ed o p\u0159ipojen\u00ed k nezn\u00e1m\u00e9mu serveru<\/a>. <\/p>\n

Pokud u\u017eivatel toto varov\u00e1n\u00ed ignoroval a zadal heslo pro p\u0159ipojen\u00ed, pak malware server<\/a> p\u0159es sebe p\u0159en\u00e1\u0161el p\u0159ipojen\u00ed k legitimn\u00edmu c\u00edlov\u00e9mu SSH serveru, uchov\u00e1val zadan\u00e9 heslo ob\u011bt\u00ed a odchyt\u00e1val informace o akc\u00edch v SSH seanci. Sou\u010dasn\u011b bylo nav\u00e1z\u00e1no p\u0159ipojen\u00ed k c\u00edlov\u00e9mu serveru se zachycen\u00fdm heslem a nainstalov\u00e1no na n\u011bj malware Ebury. Z\u00edsk\u00e1n\u00edm kontroly nad Linuxov\u00fdmi servery, kter\u00e9 nebyly v\u00fdstupn\u00edmi uzly Tor, \u00fato\u010dn\u00edci m\u011bnili nastaven\u00ed v souboru torrc a p\u0159etv\u00e1\u0159eli je na nov\u00e9 \u0161kodliv\u00e9 v\u00fdstupn\u00ed uzly Tor.<\/p>\n

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

K ur\u010den\u00ed v\u0161ech \u0161kodliv\u00fdch v\u00fdstupn\u00edch uzl\u016f pou\u017eil badatel n\u00e1stroj exitmap k proch\u00e1zen\u00ed v\u0161ech v\u00fdstupn\u00edch uzl\u016f, z\u0159izov\u00e1n\u00ed SSH p\u0159ipojen\u00ed p\u0159es ka\u017ed\u00fd z nich a kontrole skute\u010dnosti p\u0159esm\u011brov\u00e1n\u00ed \u017e\u00e1dosti. Jak\u00fdm zp\u016fsobem \u00fato\u010dn\u00edci z\u00edskali p\u0159\u00edstup k zachycen\u00fdm Tor uzl\u016fm, zat\u00edm nen\u00ed jasn\u00e9, mimo jin\u00e9 se vyjad\u0159uj\u00ed
\n p\u0159edpoklady o kompromitaci provozovatel\u016f hostingu.
\n
Zdroj: 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\udd47 P\u0159ibli\u017en\u011b 10 % v\u00fdstupn\u00edch uzl\u016f Tor se pod\u00edlelo na \u00fatoku na odposlech SSH p\u0159ipojen\u00ed | ProHoster","description":"Byly zve\u0159ejn\u011bny detaily incidentu, b\u011bhem kter\u00e9ho se \u00fato\u010dn\u00edk\u016fm poda\u0159ilo z\u00edskat kontrolu nad 333 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