{"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\/et\/blog\/novosti-interneta\/simbiote-vredonosnoe-po-dlya-linux-ispolzuyushhee-ebpf-i-ld_preload-dlya-skrytiya","title":{"rendered":"Simbiote — pahavara Linuxile, mis kasutab eBPF-i ja LD_PRELOAD-i peidetud","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"

Intezer ja BlackBerry teadlased on avastanud pahavara, mille koodinimeks on Simbiote, mis kasutatakse tagaukse ja rootkitide paigaldamiseks Linuxi voitavate serveritesse, millel on kompromiteeritud turvalisus. Pahavara tuvastati mitmete L\u00f5una-Ameerika riikide finantsasutustes. Simbiote installimiseks s\u00fcsteemi peab r\u00fcndaja omama root-juurdep\u00e4\u00e4su, mille v\u00f5ib saada n\u00e4iteks lappimata haavatavuste \u00e4rakasutamise v\u00f5i kontolekke t\u00f5ttu. Simbiote v\u00f5imaldab murdnud isikul s\u00fcsteemis oma kohalolek kindlustada, et edasiste r\u00fcnnakute jaoks varjatud tegevusi teostada ning teiste pahavara rakenduste tegevust varjata ning konfidentsiaalsete andmete \u00fclekandeid korraldada. <\/p>\n

Simbiote'i erip\u00e4ra on jagatud teeki kujul, mis laaditakse sisse k\u00f5igi protsesside k\u00e4ivitamisel LD_PRELOAD mehhanismi abil, asendades m\u00f5ned standardse teegi kutsed. Asendatud kutsete k\u00e4itlejad peidavad tagauksega seotud tegevuse, n\u00e4iteks j\u00e4tavad protsesside loendist v\u00e4lja teatud elemendid, blokeerivad juurdep\u00e4\u00e4su teatud failidele \/proc kaustas, peidavad faile kataloogides, j\u00e4tavad pahatahtliku jagatud teegi ldd v\u00e4ljundist v\u00e4lja (teostatakse execve funktsiooni pealtkuulamine ja k\u00f5nede anal\u00fc\u00fcsimine LD_TRACE_LOADED_OBJECTS keskkonnamuutujaga), mitte ei n\u00e4ita pahatahtliku tegevusega seotud v\u00f5rgu sokkleid. <\/p>\n

Traffic inspection is prevented by overriding functions of the libpcap library, filtering read access to \/proc\/net\/tcp, and loading eBPF programs into the kernel, which hinder traffic analyzers and discard external requests to the system's network handlers. The eBPF program is executed among the first handlers and operates at the lowest level of the network stack, effectively concealing the network activity of the backdoor, even from analyzers that start later. <\/p>\n

Simbiote v\u00f5imaldab samuti m\u00f6\u00f6da minna m\u00f5ningatest failis\u00fcsteemi tegevuse anal\u00fcsaatoritest, kuna konfidentsiaalsete andmete vargused v\u00f5ivad toimuda mitte failide avamise tasandil, vaid nende failide lugemise operatsioonide pealtkuulamise kaudu seaduslikus rakenduses (n\u00e4iteks teegifunktsioonide asendamine v\u00f5imaldab pealt kuulata kasutaja parooli sisestamist v\u00f5i failist laaditud andmeid koos p\u00e4\u00e4sukoodiga). Kaug-\u00fchenduse korraldamiseks p\u00fc\u00fcab Simbiote kinni m\u00f5ned PAM-k\u00f5ned (Pluggable Authentication Module), mis v\u00f5imaldab luua \u00fchenduse s\u00fcsteemiga SSH kaudu teatavate r\u00fcnnakutega kasutajan\u00e4idikutega. Samuti on ette n\u00e4htud salajane v\u00f5imalus oma privileegide t\u00f5stmiseks root-kasutajaks, m\u00e4\u00e4rates keskkonna muutujaks HTTP_SETTHIS.

\"Simbiote<\/center>
\n
Allikas: 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-novosti-interneta"],"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 Linuxile suunatud pahavara, mis kasutab eBPF ja LD_PRELOAD tehnoloogiaid varjamiseks | ProHoster","description":"Intezer ja BlackBerry ettev\u00f5tete teadlased avastasid pahavara, mille koodinimi on Simbiote. Seda kasutatakse tagaukste ja rootkit-ide paigaldamiseks Linuxi operatsioonis\u00fcsteemi all t\u00f6\u00f6tavatesse kompromiteeritud serveritesse. Pahavara tuvastati mitmete L\u00f5una-Ameerika riikide finantsasutustes. Simbiote s\u00fcsteemi installimiseks peab r\u00fcndaja omama root-juurdep\u00e4\u00e4su, mille saab n\u00e4iteks.","canonical_url":"https:\/\/prohoster.info\/et\/blog\/novosti-interneta\/simbiote-vredonosnoe-po-dlya-linux-ispolzuyushhee-ebpf-i-ld_preload-dlya-skrytiya","robots":"max-image-preview:large","keywords":"","webmasterTools":{"miscellaneous":""},"schema":null,"og:locale":"et_EE","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 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