{"id":5924,"date":"2025-11-09T00:00:00","date_gmt":"2025-11-08T22:00:00","guid":{"rendered":"https:\/\/elmeistrai.lt\/?p=5924"},"modified":"2025-10-07T14:54:48","modified_gmt":"2025-10-07T11:54:48","slug":"antivirusines-programos-gresmiu-aptikimas","status":"publish","type":"post","link":"https:\/\/elmeistrai.lt\/ru\/antivirusines-programos-gresmiu-aptikimas\/","title":{"rendered":"Antivirusin\u0117s programos gr\u0117smi\u0173 aptikimas"},"content":{"rendered":"

Kaip antivirusin\u0117 programa \u017eino, kad ka\u017ekas negerai?<\/h2>\n\n\n\n

Turb\u016bt kiekvienas esame susid\u016br\u0119 su ta akimirka, kai antivirusin\u0117 programa staiga pradeda r\u0117kti raudonu langu, kad aptiko gr\u0117sm\u0119. Bet kaip ji i\u0161 ties\u0173 supranta, kad tas failas yra pavojingas? Ar ji turi ka\u017ekoki\u0105 \u0161e\u0161t\u0105j\u012f jutim\u0105? Tikrov\u0117 yra daug \u012fdomesn\u0117 nei gal\u0117tume pagalvoti.<\/p>\n\n\n\n

Antivirusin\u0117s programos veikia kaip skaitmeniniai detektyvai, kurie nuolat ie\u0161ko \u012ftartin\u0173 p\u0117dsak\u0173 j\u016bs\u0173 kompiuteryje. Jos naudoja ne vien\u0105, o kelias skirtingas metodus, kad sugaut\u0173 kenk\u0117ji\u0161kas programas. Kai kurie metodai primena policijos darb\u0105 su nusikalt\u0117li\u0173 nuotrauk\u0173 baze, kiti \u2013 elgesio analiz\u0119, kai stebima, kaip \u012ftariamas asmuo elgiasi vie\u0161oje vietoje.<\/p>\n\n\n\n

Para\u0161\u0173 baz\u0117 \u2013 seniausia ir patikimiausia technika<\/h2>\n\n\n\n

Pirmasis ir seniausias b\u016bdas aptikti virusus \u2013 tai para\u0161\u0173 (signature) metodas. \u012esivaizduokite, kad kiekvienas virusas turi savo unikal\u0173 pir\u0161t\u0173 atspaud\u0105. Kai antivirusin\u0117s programos k\u016br\u0117jai aptinka nauj\u0105 virus\u0105, jie i\u0161analizuoja jo kod\u0105 ir i\u0161skiria unikali\u0105 sek\u0105 \u2013 tarsi genetin\u012f kod\u0105. \u0160is „pir\u0161t\u0173 atspaudas” i\u0161saugomas did\u017eiuliame duomen\u0173 baz\u0117je.<\/p>\n\n\n\n

Kai antivirusin\u0117 programa skenuoja j\u016bs\u0173 kompiuter\u012f, ji lygina kiekvien\u0105 fail\u0105 su \u0161ia duomen\u0173 baze. Jei randa sutapim\u0105 \u2013 bingo, virusas aptiktas! B\u016btent tod\u0117l antivirusin\u0117s programos nuolat pra\u0161o atsinaujinti \u2013 jos gauna naujausias para\u0161\u0173 bazes su \u0161vie\u017eiausiais virus\u0173 „pir\u0161t\u0173 atspaudais”.<\/p>\n\n\n\n

Problema su \u0161iuo metodu yra akivaizdi: jis veikia tik su jau \u017einomais virusais. Jei ka\u017ekas sukuria visi\u0161kai nauj\u0105 kenk\u0117ji\u0161k\u0105 program\u0105, para\u0161\u0173 baz\u0117je jos dar nebus. Tai kaip bandyti sugauti nusikalt\u0117l\u012f, kurio nuotraukos dar n\u0117ra policijos archyve. B\u016btent tod\u0117l antivirusin\u0117s programos negali pasikliauti vien \u0161iuo metodu.<\/p>\n\n\n\n

Euristin\u0117 analiz\u0117 \u2013 kai reikia sp\u0117ti<\/h2>\n\n\n\n

Kadangi para\u0161\u0173 metodas neveikia su naujais virusais, buvo sukurta euristin\u0117 analiz\u0117. \u0160is metodas veikia pana\u0161iai kaip patyr\u0119 detektyvai, kurie gali atpa\u017einti \u012ftartin\u0105 elges\u012f net nepa\u017e\u012fstant konkretaus nusikalt\u0117lio.<\/p>\n\n\n\n

Euristin\u0117 analiz\u0117 ie\u0161ko \u012ftartin\u0173 kodo fragment\u0173 ar strukt\u016br\u0173, kurios b\u016bdingos kenk\u0117ji\u0161kosioms programoms. Pavyzd\u017eiui, jei programa bando save nukopijuoti \u012f kitus failus, \u0161ifruoja savo kod\u0105 arba bando i\u0161jungti antivirusin\u0119 program\u0105 \u2013 tai ai\u0161k\u016bs \u012ftarimo \u017eenklai. Net jei konkretus virusas n\u0117ra \u017einomas, tokios savyb\u0117s i\u0161kelia raudonas v\u0117liav\u0117les.<\/p>\n\n\n\n

Antivirusin\u0117 programa gali net „paleisti” \u012ftartin\u0105 fail\u0105 specialioje izoliuotoje aplinkoje (sandbox) ir steb\u0117ti, k\u0105 jis daro. Jei tas failas pradeda keistai elgtis \u2013 bando keisti sisteminius failus, jungtis prie interneto be prie\u017easties ar kopijuoti save \u2013 programa supranta, kad ka\u017ekas negerai. Tai kaip leisti \u012ftariamam nusikalt\u0117liui veikti stebimoje aplinkoje, kad pamatytum, k\u0105 jis i\u0161 ties\u0173 ketina daryti.<\/p>\n\n\n\n

Elgesio steb\u0117jimas realiuoju laiku<\/h2>\n\n\n\n

Modernios antivirusin\u0117s programos nebesitenka tik fail\u0173 skenavimo \u2013 jos nuolat stebi, kas vyksta j\u016bs\u0173 kompiuteryje. Tai vadinama elgesio analize arba HIPS (Host Intrusion Prevention System).<\/p>\n\n\n\n

\u012esivaizduokite, kad j\u016bs\u0173 kompiuteryje \u012fdiegtas saugos darbuotojas, kuris stebi visas programas ir j\u0173 veiksmus. Jei ka\u017ekuri programa staiga pradeda daryti ka\u017ek\u0105 ne\u012fprasto \u2013 pavyzd\u017eiui, Word dokumentas bando modifikuoti sisteminius registrus ar atsisi\u0173sti fail\u0105 i\u0161 interneto \u2013 antivirusin\u0117 programa i\u0161kart \u012fsiki\u0161a.<\/p>\n\n\n\n

\u0160is metodas ypa\u010d efektyvus prie\u0161 naujus, dar ne\u017einomus virusus ir prie\u0161 taip vadinamus „zero-day” i\u0161puolius. Net jei kenk\u0117ji\u0161ka programa visi\u0161kai nauja ir jos n\u0117ra jokioje duomen\u0173 baz\u0117je, keistas elgesys vis tiek bus pasteb\u0117tas. Problema tik ta, kad kartais ir normalios programos gali elgtis nestandarti\u0161kai, tod\u0117l antivirusin\u0117s programos kartais kelia klaidingus pavojaus signalus.<\/p>\n\n\n\n

Debes\u0173 technologijos ir bendruomenin\u0117 \u017evalgyba<\/h2>\n\n\n\n

Vienas did\u017eiausi\u0173 prover\u017ei\u0173 antivirusin\u0117je apsaugoje \u2013 debes\u0173 technologij\u0173 panaudojimas. Vietoj to, kad visa analiz\u0117 vykt\u0173 j\u016bs\u0173 kompiuteryje, daug sunkaus darbo dabar atliekama galingose serveri\u0173 fermose.<\/p>\n\n\n\n

Kai antivirusin\u0117 programa randa \u012ftartin\u0105 fail\u0105, ji gali akimirksniu i\u0161si\u0173sti jo informacij\u0105 \u012f debes\u012f, kur galingi kompiuteriai atlieka gili\u0105 analiz\u0119. Dar svarbiau \u2013 jei vienas vartotojas ka\u017ekur pasaulyje susiduria su nauju virusu, \u0161i informacija per kelias sekundes pasiekia visus kitus tos pa\u010dios antivirusin\u0117s programos vartotojus.<\/p>\n\n\n\n

Tai veikia kaip pasaulin\u0117 ankstyvojo \u012fsp\u0117jimo sistema. Jei Australijoje ka\u017ekas atsisiunt\u0117 nauj\u0105 virus\u0105, vartotojai Lietuvoje jau bus apsaugoti, nors virusas dar net nepasiek\u0117 m\u016bs\u0173 \u0161alies. Tokia bendruomenin\u0117 \u017evalgyba drasti\u0161kai pagreitina reakcij\u0105 \u012f naujas gr\u0117smes.<\/p>\n\n\n\n

Ma\u0161ininis mokymasis ir dirbtinis intelektas<\/h2>\n\n\n\n

Naujausia antivirusini\u0173 program\u0173 karta naudoja ma\u0161inin\u012f mokym\u0105si ir dirbtin\u012f intelekt\u0105. Skamba kaip mokslin\u0117 fantastika, bet i\u0161 ties\u0173 tai jau realyb\u0117.<\/p>\n\n\n\n

Antivirusin\u0117s programos „treniruojamos” analizuojant milijonus fail\u0173 \u2013 tiek kenk\u0117ji\u0161k\u0173, tiek saugi\u0173. Dirbtinis intelektas i\u0161moksta atpa\u017einti subtilias charakteristikas, kurios atskiria virusus nuo normali\u0173 program\u0173. Kartais \u0161ie po\u017eymiai yra tokie subtilius, kad \u017emogus j\u0173 net nepasteb\u0117t\u0173, bet ma\u0161ininis mokymasis juos sugauna.<\/p>\n\n\n\n

Pavyzd\u017eiui, AI gali pasteb\u0117ti, kad kenk\u0117ji\u0161kos programos da\u017enai naudoja tam tikrus kodo \u0161ablonus, konkre\u010dias funkcij\u0173 kombinacijas ar specifin\u0119 fail\u0173 strukt\u016br\u0105. Su kiekviena nauja gr\u0117sme sistema mokosi ir tampa protingesn\u0117. Tai kaip tur\u0117ti detektyv\u0105, kuris su kiekvienu i\u0161spr\u0119stu nusikaltimu tampa vis geresnis savo darbe.<\/p>\n\n\n\n

Kod\u0117l antivirusin\u0117s programos kartais klysta?<\/h2>\n\n\n\n

Niekas n\u0117ra tobulas, ir antivirusin\u0117s programos taip pat daro klaid\u0173. Kartais jos prane\u0161a apie gr\u0117sm\u0119, kai jos i\u0161 tikr\u0173j\u0173 n\u0117ra \u2013 tai vadinami klaidingais pozityviais rezultatais (false positives).<\/p>\n\n\n\n

Da\u017eniausiai tai nutinka d\u0117l per jautrios euristin\u0117s analiz\u0117s. Programa mato ka\u017ek\u0105, kas atrodo \u012ftartina, ir nusprend\u017eia \u017eaisti saugiai. Pavyzd\u017eiui, jei legalus \u012frankis naudoja pana\u0161ias technikas kaip virusai (pvz., modifikuoja sisteminius failus), antivirusin\u0117 programa gali j\u012f klaidingai identifikuoti kaip gr\u0117sm\u0119.<\/p>\n\n\n\n

Kita problema \u2013 naujos, ma\u017eai \u017einomos programos. Jei failas n\u0117ra pla\u010diai paplit\u0119s ir antivirusin\u0117 programa jo n\u0117ra ma\u010diusi anks\u010diau, ji gali b\u016bti atsargi ir pa\u017eym\u0117ti j\u012f kaip potencialiai pavojing\u0105. Tod\u0117l populiarios programos i\u0161 \u017einom\u0173 \u0161altini\u0173 retai sukelia problem\u0173, o ka\u017ekoks naujas, egzoti\u0161kas \u012frankis gali b\u016bti u\u017eblokuotas.<\/p>\n\n\n\n

Praktiniai patarimai efektyviai apsaugai<\/h2>\n\n\n\n

Suprat\u0119, kaip veikia antivirusin\u0117s programos, galime jas naudoti efektyviau. Pirma ir svarbiausia \u2013 leiskite antivirusinei programai reguliariai atsinaujinti. Be naujausi\u0173 para\u0161\u0173 bazi\u0173 ir programin\u0117s \u012frangos versij\u0173, j\u016bs\u0173 apsauga bus kaip 2010 met\u0173 \u017eem\u0117lapis \u2013 techni\u0161kai vis dar veikiantis, bet ne itin naudingas.<\/p>\n\n\n\n

Jei antivirusin\u0117 programa prane\u0161a apie gr\u0117sm\u0119, nepulkite i\u0161 karto paspausti „ignoruoti”. Perskaitykite, k\u0105 ji aptiko ir kod\u0117l tai laikoma pavojinga. Jei tai failas, kur\u012f k\u0105 tik atsisiunt\u0117te i\u0161 abejotino \u0161altinio, grei\u010diausiai programa teisi. Jei tai programa, kuri\u0105 naudojate met\u0173 metus, gali b\u016bti klaidingas pavojaus signalas.<\/p>\n\n\n\n

Naudokite piln\u0105 sistemos skenavim\u0105 bent kart\u0105 per savait\u0119. Greitas skenavimas patikrina tik da\u017eniausiai u\u017ekr\u0117stas vietas, o pilnas skenavimas per\u017ei\u016bri visus failus. Taip, tai u\u017etrunka ilgiau, bet gali aptikti gerai pasl\u0117ptus virusus.<\/p>\n\n\n\n

Nei\u0161junkite realiojo laiko apsaugos, net jei ji kartais l\u0117tina kompiuter\u012f. B\u016btent \u0161i funkcija apsaugo jus nuo gr\u0117smi\u0173 tuo momentu, kai jos bando \u012fsiskverbti. Geriau tur\u0117ti \u0161iek tiek l\u0117tesn\u012f, bet saug\u0173 kompiuter\u012f, nei greit\u0105, bet u\u017ekr\u0117st\u0105.<\/p>\n\n\n\n

Ateitis jau \u010dia, bet kovos nesibaigs<\/h2>\n\n\n\n

Antivirusini\u0173 program\u0173 technologijos nuolat tobul\u0117ja, bet kartu tobul\u0117ja ir virusai. Tai am\u017eina ginklavimosi lenktyn\u0117s tarp kibernetini\u0173 nusikalt\u0117li\u0173 ir saugumo specialist\u0173. Kiekvienas naujas apsaugos mechanizmas sukelia naujus b\u016bdus j\u012f apeiti.<\/p>\n\n\n\n

Dirbtinis intelektas ir ma\u0161ininis mokymasis suteikia did\u017eiul\u0119 vilt\u012f, bet ir kenk\u0117j\u0173 k\u016br\u0117jai pradeda naudoti tas pa\u010dias technologijas. Jau dabar matome virusus, kurie gali prisitaikyti prie aplinkos, i\u0161mokti i\u0161vengti aptikimo ir net atpa\u017einti, kada jie veikia virtualioje aplinkoje (sandbox), kad gal\u0117t\u0173 elgtis „normaliai” ir i\u0161vengti analiz\u0117s.<\/p>\n\n\n\n

Gera \u017einia ta, kad antivirusin\u0117s programos tampa vis protingesn\u0117s ir greitesn\u0117s. Debes\u0173 technologijos leid\u017eia reaguoti \u012f naujas gr\u0117smes per minutes, o ne dienas. Bendruomenin\u0117 \u017evalgyba rei\u0161kia, kad milijonai kompiuteri\u0173 veikia kaip ankstyvojo \u012fsp\u0117jimo sistema visam pasauliui.<\/p>\n\n\n\n

Bet svarbiausia apsaugos grandis vis dar esate j\u016bs. Geriausia antivirusin\u0117 programa pasaulyje negali apsaugoti nuo vartotojo, kuris ty\u010dia i\u0161jungia visas apsaugas ir \u012fdiegia kenk\u0117ji\u0161k\u0105 program\u0105. Sveiko proto naudojimas \u2013 neatidarin\u0117ti \u012ftartin\u0173 pried\u0173, nesilankyti abejotinose svetain\u0117se, nespaudin\u0117ti kiekvieno „atsisi\u0173sti dabar” mygtuko \u2013 vis dar yra efektyviausias b\u016bdas i\u0161likti saugiems. Antivirusin\u0117 programa yra j\u016bs\u0173 partneris \u0161ioje kovoje, bet ne stebuklingas skydas, kuris apsaugo nuo vis\u0173 kvailys\u010di\u0173.<\/p>","protected":false},"excerpt":{"rendered":"

Kaip antivirusin\u0117 programa \u017eino, kad ka\u017ekas negerai? Turb\u016bt kiekvienas esame susid\u016br\u0119 su ta akimirka, kai antivirusin\u0117 programa staiga pradeda r\u0117kti…<\/p>","protected":false},"author":1,"featured_media":6008,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_uag_custom_page_level_css":"","footnotes":""},"categories":[15,17,16,7],"tags":[],"class_list":["post-5924","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-kompiuteriu-remontas-kaune","category-kompiuteriu-remontas-klaipedoje","category-kompiuteriu-remontas-vilniuje","category-kompiuteriu-remontas-kompiuteriai-naujienos-patarimai","wpcat-15-id","wpcat-17-id","wpcat-16-id","wpcat-7-id"],"yoast_head":"\nAntivirusin\u0117s programos gr\u0117smi\u0173 aptikimas<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/elmeistrai.lt\/ru\/antivirusines-programos-gresmiu-aptikimas\/\" \/>\n<meta property=\"og:locale\" content=\"ru_RU\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Antivirusin\u0117s programos gr\u0117smi\u0173 aptikimas\" \/>\n<meta property=\"og:description\" content=\"Kaip antivirusin\u0117 programa \u017eino, kad ka\u017ekas negerai? 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