{"id":104340,"date":"2022-06-10T09:36:51","date_gmt":"2022-06-10T07:36:52","guid":{"rendered":"https:\/\/prohoster.info\/blog\/novosti-interneta\/simbiote-vredonosnoe-po-dlya-linux-ispolzuyushhee-ebpf-i-ld_preload-dlya-skrytiya"},"modified":"2022-06-10T09:36:51","modified_gmt":"2022-06-10T07:36:52","slug":"simbiote-vredonosnoe-po-dlya-linux-ispolzuyushhee-ebpf-i-ld_preload-dlya-skrytiya","status":"publish","type":"post","link":"https:\/\/prohoster.info\/pl\/blog\/news\/simbiote-vredonosnoe-po-dlya-linux-ispolzuyushhee-ebpf-i-ld_preload-dlya-skrytiya","title":{"rendered":"Simbiote \u2014 z\u0142o\u015bliwe oprogramowanie dla systemu Linux wykorzystuj\u0105ce eBPF i LD_PRELOAD do ukrywania","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"

Badacze z firm Intezer i BlackBerry odkryli z\u0142o\u015bliwe oprogramowanie o nazwie kodowej Simbiote, stosowane do wprowadzania backdoor\u00f3w i rootkit\u00f3w na skompromitowane serwery dzia\u0142aj\u0105ce na systemie Linux. Z\u0142o\u015bliwe oprogramowanie zosta\u0142o zidentyfikowane w systemach instytucji finansowych w kilku krajach Ameryki \u0141aci\u0144skiej. Aby zainstalowa\u0107 Simbiote w systemie, atakuj\u0105cy musi uzyska\u0107 dost\u0119p do konta root, co mo\u017ce by\u0107 osi\u0105gni\u0119te na przyk\u0142ad w wyniku eksploatacji niepoprawionych luk w zabezpieczeniach lub wycieku danych logowania. Simbiote pozwala na utrzymanie obecno\u015bci w systemie po w\u0142amaniu, aby przeprowadza\u0107 dalsze ataki, ukrywa\u0107 aktywno\u015b\u0107 innych z\u0142o\u015bliwych aplikacji oraz organizowa\u0107 przechwytywanie poufnych danych. <\/p>\n

Cech\u0105 charakterystyczn\u0105 Simbiote jest rozprzestrzenianie si\u0119 w formie dzielonej biblioteki, kt\u00f3ra jest \u0142adowana podczas uruchamiania wszystkich proces\u00f3w za pomoc\u0105 mechanizmu LD_PRELOAD, a tak\u017ce podmienia niekt\u00f3re wywo\u0142ania standardowej biblioteki. Operatory podmienionych wywo\u0142a\u0144 ukrywaj\u0105 zwi\u0105zane z backdoorem aktywno\u015bci, na przyk\u0142ad pomijaj\u0105 poszczeg\u00f3lne elementy na li\u015bcie proces\u00f3w, blokuj\u0105 dost\u0119p do okre\u015blonych plik\u00f3w w \/proc, ukrywaj\u0105 pliki w katalogach, pomijaj\u0105 z\u0142o\u015bliw\u0105 dzielon\u0105 bibliotek\u0119 w wyj\u015bciu ldd (co osi\u0105gane jest poprzez przechwycenie funkcji execve i analiz\u0119 wywo\u0142a\u0144 z zmienn\u0105 \u015brodowiskow\u0105 LD_TRACE_LOADED_OBJECTS), oraz nie pokazuj\u0105 zwi\u0105zanych z z\u0142o\u015bliw\u0105 aktywno\u015bci\u0105 gniazd sieciowych. <\/p>\n

Aby chroni\u0107 si\u0119 przed inspekcj\u0105 ruchu, przeprowadzane jest nadpisywanie funkcji biblioteki libpcap, filtrowanie odczyt\u00f3w z \/proc\/net\/tcp oraz \u0142adowanie do j\u0105dra program\u00f3w eBPF, kt\u00f3re zapobiegaj\u0105 pracy analizator\u00f3w ruchu i odrzucaj\u0105 nieautoryzowane zapytania do w\u0142asnych procesor\u00f3w sieciowych. Program eBPF uruchamiany jest jako jeden z pierwszych procesor\u00f3w i dzia\u0142a na najni\u017cszym poziomie stosu sieciowego, co pozwala ukry\u0107 aktywno\u015b\u0107 sieciow\u0105 backdoora tak\u017ce przed analizatorami uruchomionymi p\u00f3\u017aniej. <\/p>\n

Simbiote umo\u017cliwia r\u00f3wnie\u017c obej\u015bcie niekt\u00f3rych analizator\u00f3w aktywno\u015bci w systemie plik\u00f3w, poniewa\u017c kradzie\u017c poufnych danych mo\u017ce odbywa\u0107 si\u0119 nie na poziomie otwierania plik\u00f3w, a poprzez przechwytywanie operacji odczytu z tych plik\u00f3w w legitymowanych aplikacjach (na przyk\u0142ad, podmiana funkcji bibliotecznych pozwala na przechwytywanie wprowadzonego przez u\u017cytkownika has\u0142a lub danych z pliku z kluczem dost\u0119pu). W celu zorganizowania zdalnego dost\u0119pu Simbiote przechwytuje niekt\u00f3re wywo\u0142ania PAM (Pluggable Authentication Module), co pozwala na pod\u0142\u0105czenie si\u0119 do systemu przez SSH z okre\u015blonymi agresywnymi danymi logowania. Przewidziana jest r\u00f3wnie\u017c ukryta mo\u017cliwo\u015b\u0107 podniesienia swoich uprawnie\u0144 do u\u017cytkownika root poprzez ustawienie zmiennej \u015brodowiskowej HTTP_SETTHIS.

\"Simbiote<\/center>
\n
\u0179r\u00f3d\u0142o: opennet.ru<\/a> <\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"

\u0418\u0441\u0441\u043b\u0435\u0434\u043e\u0432\u0430\u0442\u0435\u043b\u0438 \u0438\u0437 \u043a\u043e\u043c\u043f\u0430\u043d\u0438\u0439 Intezer \u0438 BlackBerry \u043e\u0431\u043d\u0430\u0440\u0443\u0436\u0438\u043b\u0438 \u0432\u0440\u0435\u0434\u043e\u043d\u043e\u0441\u043d\u043e\u0435 \u041f\u041e, \u043f\u043e\u043b\u0443\u0447\u0438\u0432\u0448\u0435\u0435 \u043a\u043e\u0434\u043e\u0432\u043e\u0435 \u0438\u043c\u044f Simbiote \u0438 \u0438\u0441\u043f\u043e\u043b\u044c\u0437\u0443\u0435\u043c\u043e\u0435 \u0434\u043b\u044f \u0432\u043d\u0435\u0434\u0440\u0435\u043d\u0438\u044f \u0431\u044d\u043a\u0434\u043e\u0440\u043e\u0432 \u0438 rootkit-\u043e\u0432 \u043d\u0430 \u0441\u043a\u043e\u043c\u043f\u0440\u043e\u043c\u0435\u0442\u0438\u0440\u043e\u0432\u0430\u043d\u043d\u044b\u0435 \u0441\u0435\u0440\u0432\u0435\u0440\u044b, \u0440\u0430\u0431\u043e\u0442\u0430\u044e\u0449\u0438\u0445 \u043f\u043e\u0434 \u0443\u043f\u0440\u0430\u0432\u043b\u0435\u043d\u0438\u0435\u043c Linux. \u0412\u0440\u0435\u0434\u043e\u043d\u043e\u0441\u043d\u043e\u0435 \u041f\u041e \u0431\u044b\u043b\u043e \u0432\u044b\u044f\u0432\u043b\u0435\u043d\u043e \u043d\u0430 \u0441\u0438\u0441\u0442\u0435\u043c\u0430\u0445 \u0444\u0438\u043d\u0430\u043d\u0441\u043e\u0432\u044b\u0445 \u0443\u0447\u0440\u0435\u0436\u0434\u0435\u043d\u0438\u0439 \u0440\u044f\u0434\u0430 \u0441\u0442\u0440\u0430\u043d \u041b\u0430\u0442\u0438\u043d\u0441\u043a\u043e\u0439 \u0410\u043c\u0435\u0440\u0438\u043a\u0438. \u0414\u043b\u044f \u0443\u0441\u0442\u0430\u043d\u043e\u0432\u043a\u0438 Simbiote \u0432 \u0441\u0438\u0441\u0442\u0435\u043c\u0443 \u0430\u0442\u0430\u043a\u0443\u044e\u0449\u0438\u0439 \u0434\u043e\u043b\u0436\u0435\u043d \u0438\u043c\u0435\u0442\u044c root-\u0434\u043e\u0441\u0442\u0443\u043f, \u043a\u043e\u0442\u043e\u0440\u044b\u0439 \u043c\u043e\u0436\u0435\u0442 \u0431\u044b\u0442\u044c \u043f\u043e\u043b\u0443\u0447\u0435\u043d, \u043d\u0430\u043f\u0440\u0438\u043c\u0435\u0440, \u0432 \u0440\u0435\u0437\u0443\u043b\u044c\u0442\u0430\u0442\u0435 […]<\/p>\n","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"author":1,"featured_media":104341,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[702],"tags":[],"class_list":["post-104340","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\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\udd47Simbiote \u2014 z\u0142o\u015bliwe oprogramowanie dla systemu Linux, wykorzystuj\u0105ce eBPF i LD_PRELOAD do ukrywania | ProHoster","description":"Badacze z firm Intezer i BlackBerry odkryli z\u0142o\u015bliwe oprogramowanie o kodowej nazwie Simbiote, wykorzystywane do wprowadzania tylnego wej\u015bcia i rootkit\u00f3w na skompromitowane serwery dzia\u0142aj\u0105ce na systemie.","canonical_url":"https:\/\/prohoster.info\/pl\/blog\/news\/simbiote-vredonosnoe-po-dlya-linux-ispolzuyushhee-ebpf-i-ld_preload-dlya-skrytiya","robots":"max-image-preview:large","keywords":"","webmasterTools":{"miscellaneous":""},"schema":null,"og:locale":"pl_PL","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\udd47Simbiote \u2014 \u0432\u0440\u0435\u0434\u043e\u043d\u043e\u0441\u043d\u043e\u0435 \u041f\u041e \u0434\u043b\u044f Linux, \u0438\u0441\u043f\u043e\u043b\u044c\u0437\u0443\u044e\u0449\u0435\u0435 eBPF \u0438 LD_PRELOAD \u0434\u043b\u044f \u0441\u043a\u0440\u044b\u0442\u0438\u044f | ProHoster","og:description":"\u0418\u0441\u0441\u043b\u0435\u0434\u043e\u0432\u0430\u0442\u0435\u043b\u0438 \u0438\u0437 \u043a\u043e\u043c\u043f\u0430\u043d\u0438\u0439 Intezer \u0438 BlackBerry \u043e\u0431\u043d\u0430\u0440\u0443\u0436\u0438\u043b\u0438 \u0432\u0440\u0435\u0434\u043e\u043d\u043e\u0441\u043d\u043e\u0435 \u041f\u041e, \u043f\u043e\u043b\u0443\u0447\u0438\u0432\u0448\u0435\u0435 \u043a\u043e\u0434\u043e\u0432\u043e\u0435 \u0438\u043c\u044f Simbiote \u0438 \u0438\u0441\u043f\u043e\u043b\u044c\u0437\u0443\u0435\u043c\u043e\u0435 \u0434\u043b\u044f \u0432\u043d\u0435\u0434\u0440\u0435\u043d\u0438\u044f \u0431\u044d\u043a\u0434\u043e\u0440\u043e\u0432 \u0438 rootkit-\u043e\u0432 \u043d\u0430 \u0441\u043a\u043e\u043c\u043f\u0440\u043e\u043c\u0435\u0442\u0438\u0440\u043e\u0432\u0430\u043d\u043d\u044b\u0435 \u0441\u0435\u0440\u0432\u0435\u0440\u044b, \u0440\u0430\u0431\u043e\u0442\u0430\u044e\u0449\u0438\u0445 \u043f\u043e\u0434 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