{"id":657,"date":"2022-03-09T15:12:24","date_gmt":"2022-03-09T14:12:24","guid":{"rendered":"http:\/\/cs21nextnet.cz\/ransomware-hrozbou-i-v-roce-2020-ale-ano-stale-je-tomu-tak\/"},"modified":"2022-03-09T15:12:24","modified_gmt":"2022-03-09T14:12:24","slug":"ransomware-hrozbou-i-v-roce-2020-ale-ano-stale-je-tomu-tak","status":"publish","type":"post","link":"https:\/\/cs21nextnet.cz\/en\/ransomware-hrozbou-i-v-roce-2020-ale-ano-stale-je-tomu-tak\/","title":{"rendered":"Ransomware hrozbou i v roce 2020? Ale ano, st\u00e1le je tomu tak."},"content":{"rendered":"

Ransomware m\u00e1 vlastn\u011b jednoduchou \u017eivotn\u00ed ideu a \u00fa\u010del: z\u00edskat z v\u00e1s pen\u00edze. Na rozd\u00edl od ostatn\u00edch virov\u00fdch hrozeb vol\u00ed rozd\u00edln\u00fd p\u0159\u00edstup. Ransomware uzamkne va\u0161e data a pak v\u00e1s vyzve k zaplacen\u00ed \u010d\u00e1stky. Bez zaplacen\u00ed v\u00fdkupn\u00e9ho se m\u016f\u017eete s daty rozlou\u010dit, tvrd\u00ed Ransomware.<\/p>\n

Jak to ale ve skute\u010dnosti je s obranou a prevenc\u00ed? Jak virus operuje a jak se dostane do va\u0161e po\u010d\u00edta\u010de?<\/p>\n<\/div>

Ransomware? To u\u017e je minulost, nebo ne?!<\/h2><\/div>

V\u00a0\u00favodu tro\u0161ku teorie: Ransomware pat\u0159\u00ed do rodiny\u00a0tzv. malware<\/strong>\u00a0(Malicious = \u0160kodliv\u00fd + Software), nebo-li \u0161kodliv\u00fdch softwar\u016f. Ransomware vznikl ze slov Software a\u00a0Ransom<\/strong>\u00a0, \u010dili v\u00fdkupn\u00e9. A tak m\u016f\u017eeme pom\u011brn\u011b jednodu\u0161e odhadnout jeho \u017eivotn\u00ed \u00fa\u010del. Program se po infiltraci do va\u0161eho za\u0159\u00edzen\u00ed pokus\u00ed vyhledat d\u016fle\u017eit\u00e1, \u010di syst\u00e9mov\u00e1 data a n\u00e1sledn\u011b je\u00a0za\u0161ifruje<\/strong>. Za odem\u010den\u00ed dat po\u017eaduj\u00ed tv\u016frci programu pak ur\u010ditou \u010d\u00e1stku a vyhro\u017euj\u00ed, \u017ee pokud nezaplat\u00edte, p\u0159ijdete o sv\u00e1 data. Nav\u017edy.<\/p>\n

Tento fenom\u00e9n poch\u00e1z\u00ed z\u00a0Ruska. Po\u010d\u00e1tkem roku 2012 se objevil i na na\u0161em \u00fazem\u00ed a v\u00a0\u010dervnu 2012 informovala o glob\u00e1ln\u00ed hrozb\u011b Ransomwar\u016f i spole\u010dnost\u00a0McAfee<\/strong>. N\u00e1sleduj\u00edc\u00edho roku se po\u010det nasb\u00edran\u00fdch unik\u00e1tn\u00edch vzork\u016f Ransomware zdvojn\u00e1sobil a n\u00e1sledovala vlna \u00fatok\u016f. \u00a0\u010ce\u0161t\u00ed u\u017eivatel\u00e9 si mohou je\u0161t\u011b vybavit vlnu vir\u016f\u00a0\u201ePolicie \u010cesk\u00e9 Republiky.\u201c<\/strong>\u00a0Ten zablokoval p\u0159\u00edstup k\u00a0syst\u00e9mu a u\u017eivatel vid\u011bl pouze varov\u00e1n\u00ed s\u00a0pou\u017eitou grafickou identitou P\u010cR. Upozorn\u011bn\u00ed (v za\u010d\u00e1tc\u00edch velice l\u00e1manou \u010de\u0161tinou) sd\u011blilo napaden\u00e9mu, \u017ee poru\u0161il \u010dasto n\u011bkter\u00fd z\u00a0kyberz\u00e1kon\u016f a mus\u00ed zaplatit virtu\u00e1ln\u00ed m\u011bnou pokutu. O Ransomware bylo tehdy hodn\u011b sly\u0161et a mezi napaden\u00e9 mohl pat\u0159it kdokoliv.<\/p>\n

V\u00a0posledn\u00edch letech se tv\u016frci \u0161kodliv\u00e9ho softwaru pou\u010dili a za\u010dali c\u00edlit na pr\u00e1vn\u00ed subjekty. A hlavn\u011b potichu. Trend se zm\u011bnil. Snad proto, \u017ee u\u017eivatel\u00e9 velice rychle p\u0159i\u0161li na to, \u017ee bu\u010f zas tak o sv\u00e1 data nestoj\u00ed, nebo si po\u010dkali, a\u017e se objev\u00ed bezpe\u010dnostn\u00ed z\u00e1plata na dan\u00fd \u00fatok. U pr\u00e1vn\u00edch subjekt\u016f je situace pom\u011brn\u011b rozd\u00edln\u00e1. V\u00a0prvn\u00ed \u0159ad\u011b nem\u016f\u017ee spole\u010dnost \u010dekat, nem\u00e1-li p\u0159\u00edstup k\u00a0firemn\u00edm dat\u016fm. Tak\u00e9 je nutn\u00e9 \u0159e\u0161it cel\u00fd probl\u00e9m co mo\u017en\u00e1 nejrychleji a diskr\u00e9tn\u011b.<\/p>\n

Tato kombinace faktor\u016f p\u0159im\u011bla tv\u016frce malwar\u016f zam\u011b\u0159it se na\u00a0spole\u010dnosti.<\/strong><\/p>\n<\/div>

Jak se br\u00e1nit?<\/h2><\/div>

Z\u00e1sadn\u00edm probl\u00e9mem a \u00farodnou p\u016fdou pro kybernetick\u00e9 \u00fatoky je \u010dasto\u00a0nedostate\u010dn\u00e9 zabezpe\u010den\u00ed<\/strong>. Kdy\u017e si do men\u0161\u00ed firmy po\u0159\u00edd\u00edme n\u011bjakou tu ochranu, spol\u00e9h\u00e1me na ni a nad\u00e1le ne\u0159e\u0161\u00edme dal\u0161\u00ed zabezpe\u010den\u00ed. Je ale d\u016fle\u017eit\u00e9 si uv\u011bdomit, \u017ee nap\u0159\u00edklad antivirus je prvn\u00ed ochranou lini\u00ed po\u010d\u00edta\u010d\u016f. Antiviry odraz\u00ed b\u011b\u017en\u00e9 \u00fatoky, ale existuje mnoho dal\u0161\u00edch zp\u016fsob\u016f, jak se m\u016f\u017ee malware dostat do po\u010d\u00edta\u010de. Lidsk\u00fd faktor je jedn\u00edm z\u00a0nich a nane\u0161t\u011bst\u00ed ten nej\u010dast\u011bj\u0161\u00ed.<\/p>\n

Ve sv\u00e9 podstat\u011b nelze spol\u00e9hat jen na z\u00e1kladn\u00ed opat\u0159en\u00ed. Nemluv\u011b o tom, \u017ee mnoho men\u0161\u00edch spole\u010dnost\u00ed nem\u00e1 \u0159\u00e1dn\u011b nastaven\u00e9 zabezpe\u010den\u00ed i kdy\u017e n\u011bjak\u00fd ten obrann\u00fd program pou\u017e\u00edvaj\u00ed.<\/p>\n

S\u00a0ohledem na pravd\u011bpodobnost a zku\u0161enosti z\u00a0praxe nen\u00ed ot\u00e1zkou jestli, ale kdy malware za\u00fato\u010d\u00ed i na v\u00e1s.<\/p>\n

Prvotn\u00edm instinktem ochrany proti Ransomware by m\u011bla b\u00fdt\u00a0z\u00e1loha<\/strong>. Ale pozor, \u0159\u00e1dn\u00e1 z\u00e1loha. Ransomware p\u0159i \u00fatoku hled\u00e1 ve\u0161ker\u00e9 dostupn\u00e9 disky a ty pak \u0161ifruje. Pokud m\u00e1te z\u00e1lohu neust\u00e1le fyzicky p\u0159ipojenou k\u00a0po\u010d\u00edta\u010di, jako byste \u017e\u00e1dnou nem\u011bli. Ta mus\u00ed b\u00fdt v\u017edy fyzicky odd\u011blen\u00e1 od z\u00e1lohovan\u00e9ho syst\u00e9mu. Ide\u00e1ln\u00edm \u0159e\u0161en\u00edm jsou s\u00ed\u0165ov\u00e1 \u00falo\u017ei\u0161t\u011b\u00a0NAS<\/strong>, \u010di nap\u0159\u00edklad\u00a0cloudov\u00e1 ulo\u017ei\u0161t\u011b<\/strong>.<\/p>\n

P\u0159i obran\u011b proti Ransomware a celkov\u011b p\u0159i jak\u00e9mukoliv \u0161kodliv\u00e9mu softwaru doporu\u010dujeme dodr\u017eovat alespo\u0148\u00a0p\u00e1r n\u00e1vyk\u016f pro IT hygienu:<\/strong><\/p>\n

    \n
  1. Naka\u017een\u00ed<\/strong>\u00a0\u2013 Virus se mus\u00ed do va\u0161eho po\u010d\u00edta\u010de n\u011bjak dostat. Nej\u010dast\u011bji putuj\u00ed p\u0159es emaily, flashky, \u010di po kliknut\u00ed na odkaz. Nepou\u017e\u00edvejte nezn\u00e1m\u00e1 datov\u00e1 za\u0159\u00edzen\u00ed a nikdy neotv\u00edrejte nezn\u00e1m\u00e9 p\u0159\u00edlohy, \u010di odkazy.<\/li>\n
  2. Riziko<\/strong>\u00a0\u2013 My jsme nejv\u011bt\u0161\u00ed riziko pro po\u010d\u00edta\u010de. P\u0159eci jen viry nep\u00ed\u0161ou po\u010d\u00edta\u010de ale lid\u00e9. Tak to i plat\u00ed u rizika lidsk\u00e9ho faktoru v\u00a0p\u0159\u00edpad\u011b napaden\u00ed. Pomoc\u00ed phishingu nen\u00ed slo\u017eit\u00e9 p\u0159esv\u011bd\u010dit nepou\u010den\u00e9 u\u017eivatele, aby provedl \u00fakon. A\u0165 u\u017e kliknut\u00ed na zmi\u0148ovan\u00fd odkaz, \u010di aby p\u0159eposlal p\u0159\u00edlohu. Nechte sv\u00e9 zam\u011bstnance informovat a pro\u0161kolit v\u00a0z\u00e1kladech kyberbezpe\u010dnosti.<\/li>\n
  3. Aktualizace<\/strong>\u00a0\u2013 Bezpe\u010dnostn\u00ed incidenty vznikaj\u00ed pr\u016fnikem \u00fato\u010dn\u00edka skrze vyu\u017eit\u00ed n\u011bjak\u00e9 skulinky, \u010dasto zp\u016fsoben\u00e9 chybovost\u00ed n\u011bkter\u00fdch program\u016f, \u010di syst\u00e9m\u016f. Aktualizace p\u0159in\u00e1\u0161\u00ed nejen nov\u00e9 funkce, ale i bezpe\u010dnostn\u00ed z\u00e1platy. Od vyd\u00e1n\u00ed prvn\u00ed verze do prvn\u00ed bezpe\u010dnost\u00ed aktualizace Windows se v\u017edy v\u00a0pr\u016fm\u011bru objev\u00ed a\u017e 10\u00a0000 nov\u00fdch potencion\u00e1ln\u00edch hrozeb na internetu. Bezpe\u010dnostn\u00ed z\u00e1platy v\u00a0podob\u011b aktualizac\u00ed d\u016frazn\u011b doporu\u010dujeme u jak\u00e9hokoliv programu.<\/li>\n
  4. Ochrana<\/strong>\u00a0\u2013 Antiviry, \u010di jak\u00e9koliv bezpe\u010dnost\u00ed software jsou mocn\u00e9 do t\u00e9 m\u00edry, jak\u00e9 jim d\u00e1te schopnosti. Nespr\u00e1vn\u011b nastaven\u00fd antivirus je, jako by tam \u017e\u00e1dn\u00fd nebyl. Nespol\u00e9hejte na antiviry, kter\u00e9 jsou zdarma \u0161i\u0159iteln\u00e9 na internetu a nastaven\u00ed zabezpe\u010den\u00ed prob\u011bhne automaticky na pozad\u00ed. Na takov\u00fdch programech se \u00fato\u010dn\u00edci \u010dasto u\u010d\u00ed, jak pronikat do syst\u00e9mu.<\/li>\n
  5. Z\u00e1loha<\/strong>\u00a0\u2013 Ano, z\u00e1loha! Pasivn\u00ed ochrana v\u00a0podob\u011b z\u00e1lohy je vlastn\u011b jedin\u00fd 100% zp\u016fsob, jak p\u0159\u00edpadn\u00fd \u00fatok Ransomware p\u0159e\u017e\u00edt. Pokud sel\u017ee v\u0161echno ostatn\u00ed, chcete m\u00edt sv\u00e1 data mimo napaden\u00fd syst\u00e9m. Jednodu\u0161e obnov\u00edte z\u00e1lohy.<\/li>\n
  6. Z\u00e1loha II<\/strong>\u00a0\u2013 Dvakr\u00e1t m\u011b\u0159, jednou \u0159e\u017e. K\u00a0z\u00e1loh\u00e1m se vrac\u00edme hned ve dvou bodech po sob\u011b. Ano, je opravdu d\u016fle\u017eit\u00e1. Z\u00e1lohu chra\u0148te, kopie um\u00edst\u011bte mimo aktivn\u00ed s\u00ed\u0165, aby \u00fato\u010dn\u00edci neza\u0161ifrovali v\u0161e i v\u010detn\u011b z\u00e1lohy.<\/li>\n
  7. Karant\u00e9na \u2013\u00a0<\/strong>Sandboxing je bezpe\u010dn\u00e9 prost\u0159ed\u00ed, ve kter\u00e9m m\u016f\u017eete nezn\u00e1m\u00e1 data bezpe\u010dn\u011b prozkoumat bez rizika roz\u0161\u00ed\u0159en\u00ed n\u00e1kazy.<\/li>\n
  8. Pozornost \u2013\u00a0<\/strong>C\u00edlen\u00e9 reklamy nap\u0159\u00edklad soci\u00e1ln\u00edch s\u00edt\u00ed, kter\u00e9 nemaj\u00ed obchodn\u00ed charakter doporu\u010dujeme p\u0159\u00edmo blokovat. V\u011bnujte pozornost nejr\u016fzn\u011bj\u0161\u00edm sd\u011blen\u00edm, zda-li se opravdu jedn\u00e1 o relevantn\u00ed a vy\u017e\u00e1dan\u00fd obsah.<\/li>\n
  9. Segmentace \u2013\u00a0<\/strong>S t\u00edmto souvis\u00ed jak body\u00a0Karant\u00e9na,<\/strong>\u00a0tak i\u00a0Z\u00e1lohov\u00e1n\u00ed<\/strong>. Firemn\u00ed s\u00ed\u0165 je vhodn\u00e9 segmentovat do bezpe\u010dnostn\u00edch z\u00f3n, aby se zabr\u00e1nilo \u0161\u00ed\u0159en\u00ed malwar\u016f.<\/li>\n
  10. Anal\u00fdza \u2013\u00a0<\/strong>Pokud ji\u017e k \u00fatoku do\u0161lo, je pot\u0159eba v\u017edy nal\u00e9zt p\u016fvod n\u00e1kazy, identifikovat druh virov\u00e9 hrozby a n\u00e1sledn\u011b se ji zbavit. Anal\u00fdza pom\u016f\u017ee se nejen p\u0159ipravit na dal\u0161\u00ed mo\u017en\u00e9 \u00fatoky, ale tak\u00e9 pom\u016f\u017ee identifikovat kter\u00e9 oblasti a data<\/li>\n<\/ol>\n<\/div><\/div><\/div><\/div><\/div>\n","protected":false},"excerpt":{"rendered":"","protected":false},"author":4,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[8],"tags":[],"class_list":["post-657","post","type-post","status-publish","format-standard","hentry","category-uncategorized"],"yoast_head":"\nRansomware hrozbou i v roce 2020? 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