{"id":5188,"date":"2023-03-02T12:51:40","date_gmt":"2023-03-02T11:51:40","guid":{"rendered":"https:\/\/bezpecnevofirme.eset.com\/sk\/?p=5188"},"modified":"2023-03-02T12:53:09","modified_gmt":"2023-03-02T11:53:09","slug":"bootkit-blacklotus-utoci-na-rozhranie-uefi-postihuje-aj-aktualizovane-operacne-systemy-este-pred-ich-spustenim","status":"publish","type":"post","link":"https:\/\/bezpecnevofirme.eset.com\/sk\/cybernews\/bootkit-blacklotus-utoci-na-rozhranie-uefi-postihuje-aj-aktualizovane-operacne-systemy-este-pred-ich-spustenim\/","title":{"rendered":"Bootkit BlackLotus \u00fato\u010d\u00ed na rozhranie UEFI, postihuje aj aktualizovan\u00e9 opera\u010dn\u00e9 syst\u00e9my e\u0161te pred ich spusten\u00edm"},"content":{"rendered":"\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"536\" src=\"https:\/\/bezpecnevofirme.eset.com\/sk\/wp-content\/uploads\/sites\/2\/2023\/03\/lotus-1200x628_notext-1024x536.jpg\" alt=\"BlackLotus nahladovy obrazok\" class=\"wp-image-5189\" srcset=\"https:\/\/bezpecnevofirme.eset.com\/sk\/wp-content\/uploads\/sites\/2\/2023\/03\/lotus-1200x628_notext-1024x536.jpg 1024w, https:\/\/bezpecnevofirme.eset.com\/sk\/wp-content\/uploads\/sites\/2\/2023\/03\/lotus-1200x628_notext-300x157.jpg 300w, https:\/\/bezpecnevofirme.eset.com\/sk\/wp-content\/uploads\/sites\/2\/2023\/03\/lotus-1200x628_notext-768x402.jpg 768w, https:\/\/bezpecnevofirme.eset.com\/sk\/wp-content\/uploads\/sites\/2\/2023\/03\/lotus-1200x628_notext-370x194.jpg 370w, https:\/\/bezpecnevofirme.eset.com\/sk\/wp-content\/uploads\/sites\/2\/2023\/03\/lotus-1200x628_notext-760x398.jpg 760w, https:\/\/bezpecnevofirme.eset.com\/sk\/wp-content\/uploads\/sites\/2\/2023\/03\/lotus-1200x628_notext.jpg 1200w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n\n\n\n<div style=\"height:30px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<p class=\"wp-block-paragraph\">V\u00fdskumn\u00edci spolo\u010dnosti ESET zverejnili ako v\u00f4bec prv\u00ed na svete <a href=\"https:\/\/www.eset.com\/sk\/o-nas\/press-centrum\/eset-tlacove-spravy\/malver-blacklotus-zamerany-na-uefi-sa-da-ziskat-na-hackerskych-forach-a-postihuje-aj-plne-aktualizov\/\" target=\"_blank\" rel=\"noreferrer noopener\"><strong>anal\u00fdzu prv\u00e9ho UEFI bootkitu<\/strong><\/a> zaznamenan\u00e9ho v\u00a0re\u00e1lnych podmienkach. Zistili, \u017ee ide o malv\u00e9r BlackLotus, ktor\u00fd je dostupn\u00fd na hackersk\u00fdch f\u00f3rach a ktor\u00fd dok\u00e1\u017ee ob\u00eds\u0165 bezpe\u010dnostn\u00e9 mechanizmy platformy Windows. Zariadenia postihuje e\u0161te pred \u0161tartom opera\u010dn\u00e9ho syst\u00e9mu. <\/p>\n\n\n\n<h3 class=\"wp-block-heading\">BlackLotus je dostupn\u00fd na hackersk\u00fdch f\u00f3rach za 5 000 $<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Telemetria spolo\u010dnosti ESET zaznamenala koncom roka 2022 podozriv\u00fd HTTP downloader. Po hlb\u0161ej anal\u00fdze v\u00fdskumn\u00edci zistili, \u017ee ide s vysokou mierou istoty o s\u00fa\u010das\u0165 bootkitu BlackLotus. Vzorky n\u00e1jden\u00e9ho k\u00f3du ich doviedli k odhaleniu \u010fa\u013e\u0161\u00edch \u0161iestich in\u0161tala\u010dn\u00fdch s\u00faborov BlackLotus. <\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><em>\u201eTo n\u00e1m umo\u017enilo presk\u00fama\u0165 cel\u00fd re\u0165azec krokov ved\u00facich k&nbsp;jeho spusteniu a&nbsp;uvedomili sme si, \u017ee nem\u00e1me do\u010dinenia s oby\u010dajn\u00fdm malv\u00e9rom,\u201c<\/em> uv\u00e1dza Martin Smol\u00e1r, v\u00fdskumn\u00edk spolo\u010dnosti ESET, ktor\u00fd viedol anal\u00fdzu bootkitu. &nbsp;<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">UEFI bootkit BlackLotus sa pred\u00e1va na hackersk\u00fdch f\u00f3rach minim\u00e1lne od okt\u00f3bra 2022 za 5&nbsp;000 dol\u00e1rov. V temn\u00fdch z\u00e1kutiach internetu je tento malv\u00e9r aj propagovan\u00fd. ESET dok\u00e1zal, \u017ee reklamy na tento bootkit nie s\u00fa iba podvod, ale odkazuj\u00fa na skuto\u010dn\u00fa a nebezpe\u010dn\u00fa hrozbu. <\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><em>\u201eNa z\u00e1klade mal\u00e9ho po\u010dtu vzoriek bootkitu BlackLotus, ktor\u00e9 sme z\u00edskali \u010di u\u017e z&nbsp;na\u0161ej telemetrie alebo z verejn\u00fdch zdrojov, sa nazd\u00e1vame, \u017ee ho e\u0161te neza\u010dalo vyu\u017e\u00edva\u0165 ve\u013ea \u00fato\u010dn\u00edkov. Ob\u00e1vame sa v\u0161ak, \u017ee sa to m\u00f4\u017ee r\u00fdchlo zmeni\u0165, akon\u00e1hle sa bootkit dostane do r\u00fak zlo\u010dineck\u00fdch skup\u00edn. Bootkit sa toti\u017e \u013eahko in\u0161taluje a&nbsp;tak\u00e9to skupiny dok\u00e1\u017eu \u0161\u00edri\u0165 malv\u00e9r pomocou svojich botnetov<\/em>,&#8221; vysvet\u013euje Martin Smol\u00e1r. <\/p>\n\n\n\n<p class=\"has-bg-color-color has-text-hover-background-color has-text-color has-background wp-block-paragraph\"><strong>\u010co to je UEFI? <\/strong><br><br>Po\u010d\u00edta\u010dov\u00fd k\u00f3d, ktor\u00fd sa sp\u00fa\u0161\u0165a hne\u010f po zapnut\u00ed po\u010d\u00edta\u010da a m\u00e1 najvy\u0161\u0161iu moc nad&nbsp;jeho opera\u010dn\u00fdm syst\u00e9mom (a t\u00fdm p\u00e1dom nad cel\u00fdm zariaden\u00edm), sa vol\u00e1 firmv\u00e9r. UEFI predstavuje s\u00fabor pravidiel pre spr\u00e1vanie firmv\u00e9ru a ide o n\u00e1hradu star\u0161ieho BIOS-u. UEFI sl\u00fa\u017ei ako rozhranie medzi firmv\u00e9rom a opera\u010dn\u00fdm syst\u00e9mom a je akt\u00edvne e\u0161te pred jeho spusten\u00edm. <\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Bootkit je nebezpe\u010dn\u00fd aj napriek z\u00e1plat\u00e1m<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Bootkit BlackLotus dok\u00e1\u017ee ob\u00eds\u0165 aj mechanizmus UEFI Secure Boot, ktor\u00fd kontroluje bezpe\u010dnos\u0165 k\u00f3du sp\u00fa\u0161\u0165an\u00e9ho firmv\u00e9rom v skorom \u0161t\u00e1diu bootovania (sp\u00fa\u0161\u0165ania opera\u010dn\u00e9ho syst\u00e9mu). Dok\u00e1\u017ee tak zotrva\u0165 v zariaden\u00ed a operova\u0165 v \u0148om e\u0161te pred spusten\u00edm opera\u010dn\u00e9ho syst\u00e9mu. Zneu\u017e\u00edva na to viac ako rok star\u00fa zranite\u013enos\u0165 (CVE-2022-21894), pri\u010dom ide o prv\u00e9 verejne zaznamenanie tejto zranite\u013enosti v re\u00e1lnom prostred\u00ed.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Aj napriek tomu, \u017ee t\u00e1to zranite\u013enos\u0165 bola zapl\u00e1tan\u00e1 v&nbsp;r\u00e1mci Microsoft aktualiz\u00e1cie e\u0161te v&nbsp;janu\u00e1ri 2022, jej zneu\u017eitie je aj na\u010falej mo\u017en\u00e9 a to aj na plne aktualizovan\u00fdch opera\u010dn\u00fdch syst\u00e9moch Windows 11. S\u00favisiace moduly s\u00fa toti\u017e st\u00e1le po\u010d\u00edta\u010dom pova\u017eovan\u00e9 za d\u00f4veryhodn\u00e9. Ich podpisy zatia\u013e neboli pridan\u00e9 do zoznamu zneplatnen\u00fdch podpisov, zn\u00e1meho ako UEFI revocation list. BlackLotus tak opera\u010dn\u00e9mu syst\u00e9mu dod\u00e1 legit\u00edmne, no zranite\u013en\u00e9 komponenty, ktor\u00e9 n\u00e1sledne s\u00e1m zneu\u017eije.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">BlackLotus dok\u00e1\u017ee vypn\u00fa\u0165 bezpe\u010dnostn\u00e9 mechanizmy<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">V\u010faka umiestneniu v UEFI dok\u00e1\u017ee bootkit vypn\u00fa\u0165 bezpe\u010dnostn\u00e9 mechanizmy opera\u010dn\u00e9ho syst\u00e9mu ako BitLocker, HVCI a&nbsp;Windows Defender a z\u00edska\u0165 pln\u00fa kontrolu nad \u0161tartom opera\u010dn\u00e9ho syst\u00e9mu. T\u00e1to schopnos\u0165 umo\u017e\u0148uje UEFI bootkitom operova\u0165 ve\u013emi nen\u00e1padne a&nbsp;z\u00e1rove\u0148 s&nbsp;ve\u013ek\u00fdmi pr\u00e1vomocami.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Akon\u00e1hle je BlackLotus nain\u0161talovan\u00fd, jeho hlavn\u00fdm cie\u013eom je nasadi\u0165 ovl\u00e1da\u010d do jadra opera\u010dn\u00e9ho syst\u00e9mu (ktor\u00fd okrem in\u00e9ho chr\u00e1ni bootkit pred odstr\u00e1nen\u00edm) a&nbsp;HTTP downloader zodpovedn\u00fd za komunik\u00e1ciu s&nbsp;riadiacim serverom, ktor\u00fd&nbsp;dok\u00e1\u017ee spusti\u0165 \u010fal\u0161\u00ed \u0161kodliv\u00fd obsah.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Zauj\u00edmavos\u0165ou je, \u017ee niektor\u00e9 in\u0161tala\u010dn\u00e9 s\u00fabory BlackLotus, ktor\u00e9 analyzoval ESET, nepokra\u010duj\u00fa v&nbsp;in\u0161tal\u00e1cii, ak skompromitovan\u00e9 zariadenie pou\u017e\u00edva jazykov\u00e9 nastavenia typick\u00e9 pre Arm\u00e9nsko, Bielorusko, Kazachstan, Moldavsko, Rusko alebo Ukrajinu.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Ako chr\u00e1ni\u0165 UEFI?<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\"><a href=\"https:\/\/bezpecnevofirme.eset.com\/sk\/eset-riesenia-pre-firmy\/\" target=\"_blank\" rel=\"noreferrer noopener\"><strong>Produkty spolo\u010dnosti ESET<\/strong><\/a> maj\u00fa bezpe\u010dnostn\u00fa vrstvu ur\u010den\u00fa na detekciu \u0161kodliv\u00fdch doplnkov vo firmv\u00e9ri po\u010d\u00edta\u010da, ktor\u00e1 sa vol\u00e1 <a href=\"https:\/\/www.eset.com\/sk\/uefi\/#eset-help\" target=\"_blank\" rel=\"noreferrer noopener\"><strong>Kontrola UEFI<\/strong><\/a>. Tento n\u00e1stroj spr\u00edstup\u0148uje firmv\u00e9r k skenovaniu. N\u00e1sledne je k\u00f3d firmv\u00e9ru preskenovan\u00fd antimalv\u00e9rov\u00fdmi detek\u010dn\u00fdmi technol\u00f3giami. ESET z\u00e1kazn\u00edci si m\u00f4\u017eu firmv\u00e9r skenova\u0165 pravidelne, alebo jednorazovo. <\/p>\n\n\n\n<p class=\"wp-block-paragraph\">V\u00e4\u010d\u0161ina detekci\u00ed je ozna\u010den\u00e1 ako Potenci\u00e1lne nebezpe\u010dn\u00e1 aplik\u00e1cia \u2013 teda k\u00f3d, ktor\u00fd m\u00e1 \u0161irok\u00fa moc nad syst\u00e9mom a m\u00f4\u017ee by\u0165 preto zneu\u017eit\u00fd. Ten ist\u00fd k\u00f3d m\u00f4\u017ee by\u0165 \u00faplne legit\u00edmny ak pou\u017e\u00edvate\u013e alebo administr\u00e1tor vedia o jeho pr\u00edtomnosti. M\u00f4\u017ee by\u0165 v\u0161ak aj \u0161kodliv\u00fd, ak bol nain\u0161talovan\u00fd bez ich vedomia alebo s\u00fahlasu.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Viac technick\u00fdch inform\u00e1ci\u00ed o bootkite BlackLotus n\u00e1jdete v anglickom jazyku na str\u00e1nke <a href=\"https:\/\/www.welivesecurity.com\/2023\/03\/01\/blacklotus-uefi-bootkit-myth-confirmed\/\" target=\"_blank\" rel=\"noreferrer noopener\"><strong>WeLiveSecurity<\/strong><\/a>. <\/p>\n","protected":false},"excerpt":{"rendered":"<p>ESET zverejnil ako prv\u00fd na svete anal\u00fdzu prv\u00e9ho UEFI bootkitu zaznamenan\u00e9ho v\u00a0re\u00e1lnych podmienkach. Ide o malv\u00e9r BlackLotus, ktor\u00fd dok\u00e1\u017ee ob\u00eds\u0165 bezpe\u010dnostn\u00e9 mechanizmy platformy Windows. <\/p>\n","protected":false},"author":8,"featured_media":5190,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_coblocks_attr":"","_coblocks_dimensions":"","_coblocks_responsive_height":"","_coblocks_accordion_ie_support":"","footnotes":""},"categories":[102],"tags":[],"class_list":["post-5188","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-cybernews"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.8 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>BlackLotus \u00fato\u010d\u00ed na UEFI, p\u00e1cha \u0161kody pred spusten\u00edm OS | ESET<\/title>\n<meta name=\"description\" content=\"ESET zverejnil ako prv\u00fd na svete anal\u00fdzu prv\u00e9ho UEFI bootkitu zaznamenan\u00e9ho v\u00a0re\u00e1lnych podmienkach. 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