{"id":1678,"date":"2021-03-17T18:14:00","date_gmt":"2021-03-17T17:14:00","guid":{"rendered":"https:\/\/www.forensee.cz\/?p=1678"},"modified":"2021-03-17T18:14:00","modified_gmt":"2021-03-17T17:14:00","slug":"podvodne-e-maily-a-jejich-zakladni-znaky","status":"publish","type":"post","link":"https:\/\/www.forensee.cz\/en\/2021\/03\/17\/podvodne-e-maily-a-jejich-zakladni-znaky\/","title":{"rendered":"Podvodn\u00e9 e-maily a jejich z\u00e1kladn\u00ed znaky"},"content":{"rendered":"<p>[et_pb_section fb_built=&#8220;1&#8243; _builder_version=&#8220;3.22&#8243;][et_pb_row _builder_version=&#8220;3.25&#8243; background_size=&#8220;initial&#8220; background_position=&#8220;top_left&#8220; background_repeat=&#8220;repeat&#8220;][et_pb_column type=&#8220;4_4&#8243; _builder_version=&#8220;3.25&#8243; custom_padding=&#8220;|||&#8220; custom_padding__hover=&#8220;|||&#8220;][et_pb_text _builder_version=&#8220;4.9.2&#8243; background_size=&#8220;initial&#8220; background_position=&#8220;top_left&#8220; background_repeat=&#8220;repeat&#8220; text_orientation=&#8220;justified&#8220;]<!-- divi:paragraph --><\/p>\n<p>Podvodn\u00e9 e-maily jsou jednou z\u00a0nejb\u011b\u017en\u011bj\u0161\u00edch forem phishingu a zrovna v\u00a0\u010cesku jsou velmi roz\u0161\u00ed\u0159en\u00e9. Kvalita zpracov\u00e1n\u00ed se st\u00e1le zvy\u0161uje, proto n\u011bkter\u00e9 z\u00a0nich ji\u017e vypadaj\u00ed velmi d\u016fv\u011bryhodn\u011b a jsou tak v\u011bt\u0161\u00ed hrozbou. V\u00a0tomto \u010dl\u00e1nku jsme pro v\u00e1s p\u0159ipravili uk\u00e1zky t\u011bchto e-mail\u016f se znaky, kter\u00e9 umo\u017e\u0148uj\u00ed odhalen\u00ed podvodu.<\/p>\n<p>V\u011bt\u0161ina podvodn\u00fdch e-mail\u016f m\u00e1 za c\u00edl z\u00edskat citliv\u00e1 data adres\u00e1t\u016f, jako nap\u0159\u00edklad hesla a p\u0159ihla\u0161ovac\u00ed jm\u00e9na nebo informace k bankovn\u00edm \u00fa\u010dt\u016fm. Jindy po v\u00e1s mohou po\u017eadovat uhrazen\u00ed ur\u010dit\u00e9 \u010d\u00e1stky pod z\u00e1\u0161titou nap\u0159\u00edklad chyby d\u016fv\u011bryhodn\u00e9 organizace. Toto jsou obecn\u011b strategie phishingu, p\u0159i\u010dem\u017e tyto e-maily jsou jen jednou z jeho mnoha forem. O phishingu jsme psali <a href=\"https:\/\/www.forensee.cz\/en\/2021\/01\/08\/phishing\/\">zde<\/a>. Nyn\u00ed se v\u0161ak poj\u010fme pod\u00edvat na konkr\u00e9tn\u00ed p\u0159\u00edpady podvodn\u00fdch e-mail\u016f \u2013 n\u00ed\u017ee p\u0159ikl\u00e1d\u00e1me dva screenshoty jako p\u0159\u00edklady, jak takov\u00e9 e-maily mohou vypadat:<\/p>\n<p>&nbsp;<\/p>\n<p><!-- \/divi:paragraph -->[\/et_pb_text][et_pb_image src=&#8220;https:\/\/www.forensee.cz\/wp-content\/uploads\/2021\/03\/Snimek-obrazovky-2021-03-15-v-16.45.14.png&#8220; title_text=&#8220;Sn\u00edmek obrazovky 2021-03-15 v 16.45.14&#8243; _builder_version=&#8220;4.9.2&#8243; _module_preset=&#8220;default&#8220;][\/et_pb_image][\/et_pb_column][\/et_pb_row][et_pb_row _builder_version=&#8220;4.9.2&#8243; _module_preset=&#8220;default&#8220;][et_pb_column type=&#8220;4_4&#8243; _builder_version=&#8220;4.9.2&#8243; _module_preset=&#8220;default&#8220;][et_pb_image src=&#8220;https:\/\/www.forensee.cz\/wp-content\/uploads\/2021\/03\/Snimek-obrazovky-2021-03-15-v-16.45.03.png&#8220; title_text=&#8220;Sn\u00edmek obrazovky 2021-03-15 v 16.45.03&#8243; _builder_version=&#8220;4.9.2&#8243; _module_preset=&#8220;default&#8220;][\/et_pb_image][\/et_pb_column][\/et_pb_row][et_pb_row _builder_version=&#8220;4.9.2&#8243; _module_preset=&#8220;default&#8220;][et_pb_column type=&#8220;4_4&#8243; _builder_version=&#8220;4.9.2&#8243; _module_preset=&#8220;default&#8220;][et_pb_text _builder_version=&#8220;4.9.2&#8243; _module_preset=&#8220;default&#8220;]<\/p>\n<p>Na prvn\u00ed pohled vypadaj\u00ed pom\u011brn\u011b d\u016fv\u011bryhodn\u011b, \u017ee? Pr\u00e1v\u011b zd\u00e1nliv\u00e1 d\u016fv\u011bryhodnost je hlavn\u00ed zbran\u00ed takov\u00fdch e-mail\u016f. Tyto e-maily nemaj\u00ed zjevn\u00e9 grafick\u00e9 chyby jako mnoh\u00e9 jin\u00e9 phishingov\u00e9 zpr\u00e1vy maj\u00ed; takov\u00e9 chyby zahrnuj\u00ed \u0161patn\u00e9 odsazen\u00ed, \u0161patn\u00e9 form\u00e1tov\u00e1n\u00ed, rozmazan\u00e9 obr\u00e1zky, chybn\u00e1 loga, r\u016fzn\u00e9 barvy textu neodpov\u00eddaj\u00edc\u00ed firemn\u00edm standard\u016fm apod. Podez\u0159el\u00e9 je ov\u0161em u\u017e to, \u017ee prvn\u00ed e-mail po v\u00e1s vy\u017eaduje p\u0159ihl\u00e1\u0161en\u00ed a druh\u00fd e-mail dokonce platbu. P\u0159ihla\u0161ov\u00e1n\u00ed toti\u017e p\u0159es e-maily v\u00a0drtiv\u00e9 v\u011bt\u0161in\u011b p\u0159\u00edpad\u016f neprob\u00edh\u00e1, obzvl\u00e1\u0161\u0165 ne u firem jako Apple atd. P\u0159es e-mail prob\u00edh\u00e1 pouze potvrzov\u00e1n\u00ed ji\u017e vytvo\u0159en\u00e9ho p\u0159ihl\u00e1\u0161en\u00ed. Stejn\u011b tak platby prob\u00edhaj\u00ed p\u0159es platebn\u00ed br\u00e1ny na str\u00e1nk\u00e1ch e-shop\u016f, na e-mail v\u00e1m p\u0159ijde pouze faktura \u010di potvrzen\u00ed o zaplacen\u00ed. Pokud byste n\u011bkter\u00fd z\u00a0odkaz\u016f v\u00a0jednom \u010di druh\u00e9m p\u0159\u00edpad\u011b rozklikli, vedl by na fale\u0161n\u00e9 str\u00e1nky, kde byste museli zadat citliv\u00e9 \u00fadaje nebo p\u0159\u00edmo poslat pen\u00edze. Jinou mo\u017enost\u00ed je, \u017ee by va\u0161e za\u0159\u00edzen\u00ed bylo skrze str\u00e1nky napadeno malwarem. Je tak\u00e9 \u010dast\u00e9, \u017ee takov\u00e9to e-maily obsahuj\u00ed p\u0159\u00edlohy (nap\u0159\u00edklad obr\u00e1zky, textov\u00e9 soubory apod.). Je nanejv\u00fd\u0161 d\u016fle\u017eit\u00e9 tyto p\u0159\u00edlohy neotv\u00edrat, s\u00a0nejv\u011bt\u0161\u00ed pravd\u011bpodobnost\u00ed obsahuj\u00ed malware.<\/p>\n<p>Dal\u0161\u00edmi ukazateli nepravosti e-mail\u016f je nap\u0159\u00edklad \u0161patn\u00e1 formulace (viz \u010derven\u00e9 \u0161ipky). E-maily jsou toti\u017e p\u0159ekl\u00e1d\u00e1ny z\u00a0jin\u00fdch jazyk\u016f a p\u0159eklady jsou \u010dasto nekvalitn\u00ed, kostrbat\u00e9, zcela \u0161patn\u00e9 nebo \u010d\u00e1sti nejsou p\u0159elo\u017eeny v\u016fbec.<\/p>\n<p>[\/et_pb_text][\/et_pb_column][\/et_pb_row][et_pb_row _builder_version=&#8220;4.9.2&#8243; _module_preset=&#8220;default&#8220;][et_pb_column type=&#8220;4_4&#8243; _builder_version=&#8220;4.9.2&#8243; _module_preset=&#8220;default&#8220;][et_pb_image src=&#8220;https:\/\/www.forensee.cz\/wp-content\/uploads\/2021\/03\/sipky-posta.jpg&#8220; title_text=&#8220;\u0161ipky po\u0161ta&#8220; _builder_version=&#8220;4.9.2&#8243; _module_preset=&#8220;default&#8220;][\/et_pb_image][\/et_pb_column][\/et_pb_row][et_pb_row _builder_version=&#8220;4.9.2&#8243; _module_preset=&#8220;default&#8220;][et_pb_column type=&#8220;4_4&#8243; _builder_version=&#8220;4.9.2&#8243; _module_preset=&#8220;default&#8220;][et_pb_image src=&#8220;https:\/\/www.forensee.cz\/wp-content\/uploads\/2021\/03\/sipky-apple.jpg&#8220; title_text=&#8220;\u0161ipky apple&#8220; _builder_version=&#8220;4.9.2&#8243; _module_preset=&#8220;default&#8220;][\/et_pb_image][\/et_pb_column][\/et_pb_row][et_pb_row _builder_version=&#8220;4.9.2&#8243; _module_preset=&#8220;default&#8220;][et_pb_column type=&#8220;4_4&#8243; _builder_version=&#8220;4.9.2&#8243; _module_preset=&#8220;default&#8220;][et_pb_text _builder_version=&#8220;4.9.2&#8243; _module_preset=&#8220;default&#8220;]<\/p>\n<p>Gramatick\u00fdch, stylistick\u00fdch a pravopisn\u00fdch chyb by se v\u00a0textu dalo naj\u00edt v\u00edce, ov\u0161em v\u00a0e-mailech jsou obsa\u017eeny i jin\u00e9 nep\u0159esnosti (nap\u0159\u00edklad chyb\u00ed + p\u0159ed \u010deskou p\u0159edvolbou +420 u telefonn\u00edho \u010d\u00edsla v\u00a0prvn\u00edm e-mailu \u2013 zv\u00fdrazn\u011bno modrou \u0161ipkou). Je\u0161t\u011b v\u00fdrazn\u011bj\u0161\u00edm ukazatelem jsou v\u0161ak adresy odes\u00edlatel\u016f:<\/p>\n<p>[\/et_pb_text][\/et_pb_column][\/et_pb_row][et_pb_row _builder_version=&#8220;4.9.2&#8243; _module_preset=&#8220;default&#8220;][et_pb_column type=&#8220;4_4&#8243; _builder_version=&#8220;4.9.2&#8243; _module_preset=&#8220;default&#8220;][et_pb_image src=&#8220;https:\/\/www.forensee.cz\/wp-content\/uploads\/2021\/03\/Snimek-obrazovky-2021-03-15-v-16.51.41.png&#8220; title_text=&#8220;Sn\u00edmek obrazovky 2021-03-15 v 16.51.41&#8243; _builder_version=&#8220;4.9.2&#8243; _module_preset=&#8220;default&#8220;][\/et_pb_image][\/et_pb_column][\/et_pb_row][et_pb_row _builder_version=&#8220;4.9.2&#8243; _module_preset=&#8220;default&#8220;][et_pb_column type=&#8220;4_4&#8243; _builder_version=&#8220;4.9.2&#8243; _module_preset=&#8220;default&#8220;][et_pb_image src=&#8220;https:\/\/www.forensee.cz\/wp-content\/uploads\/2021\/03\/Snimek-obrazovky-2021-03-15-v-16.52.00.png&#8220; title_text=&#8220;Sn\u00edmek obrazovky 2021-03-15 v 16.52.00&#8243; _builder_version=&#8220;4.9.2&#8243; _module_preset=&#8220;default&#8220;][\/et_pb_image][\/et_pb_column][\/et_pb_row][et_pb_row _builder_version=&#8220;4.9.2&#8243; _module_preset=&#8220;default&#8220;][et_pb_column type=&#8220;4_4&#8243; _builder_version=&#8220;4.9.2&#8243; _module_preset=&#8220;default&#8220;][et_pb_text _builder_version=&#8220;4.9.2&#8243; _module_preset=&#8220;default&#8220;]<\/p>\n<p>V prvn\u00ed adrese nen\u00ed ani zm\u00ednka o \u010cesk\u00e9 po\u0161t\u011b a je vid\u011bt, \u017ee odes\u00edlatelem tedy bude n\u011bkdo jin\u00fd. Druh\u00e1 adresa je podez\u0159el\u00e1 na prvn\u00ed pohled u\u017e jen svoj\u00ed d\u00e9lkou. Op\u011bt v\u00a0n\u00ed nen\u00ed zm\u00edn\u011bna spole\u010dnost Apple nebo cokoli, co by ji p\u0159ipom\u00ednalo, naopak je sm\u011bsic\u00ed slov a \u010d\u00edslic dohromady, co\u017e rozhodn\u011b nen\u00ed ofici\u00e1ln\u00ed adresa. E-mailov\u00e9 adresy takov\u00fdchto velk\u00fdch spole\u010dnost\u00ed budou z\u0159eteln\u00e9, jasn\u00e9 a bude v\u00a0nich odkaz na danou spole\u010dnost. V\u0161imn\u011bte si v\u0161ak, jak vypad\u00e1 n\u00e1zev odes\u00edlatel\u016f v\u00a0hlavi\u010dce e-mailu (zn\u00e1zorn\u011bno oran\u017eov\u00fdmi \u0161ipkami):<\/p>\n<p>[\/et_pb_text][\/et_pb_column][\/et_pb_row][et_pb_row _builder_version=&#8220;4.9.2&#8243; _module_preset=&#8220;default&#8220;][et_pb_column type=&#8220;4_4&#8243; _builder_version=&#8220;4.9.2&#8243; _module_preset=&#8220;default&#8220;][et_pb_image src=&#8220;https:\/\/www.forensee.cz\/wp-content\/uploads\/2021\/03\/sipka-adresa-1.jpg&#8220; title_text=&#8220;\u0161ipka adresa 1&#8243; _builder_version=&#8220;4.9.2&#8243; _module_preset=&#8220;default&#8220;][\/et_pb_image][\/et_pb_column][\/et_pb_row][et_pb_row _builder_version=&#8220;4.9.2&#8243; _module_preset=&#8220;default&#8220;][et_pb_column type=&#8220;4_4&#8243; _builder_version=&#8220;4.9.2&#8243; _module_preset=&#8220;default&#8220;][et_pb_image src=&#8220;https:\/\/www.forensee.cz\/wp-content\/uploads\/2021\/03\/sipka-adresa-2.jpg&#8220; title_text=&#8220;\u0161ipka adresa 2&#8243; _builder_version=&#8220;4.9.2&#8243; _module_preset=&#8220;default&#8220;][\/et_pb_image][\/et_pb_column][\/et_pb_row][et_pb_row _builder_version=&#8220;4.9.2&#8243; _module_preset=&#8220;default&#8220;][et_pb_column type=&#8220;4_4&#8243; _builder_version=&#8220;4.9.2&#8243; _module_preset=&#8220;default&#8220;][et_pb_text _builder_version=&#8220;4.9.2&#8243; _module_preset=&#8220;default&#8220;]<\/p>\n<p>Jak vid\u00edte, takto na prvn\u00ed pohled se tv\u00e1\u0159\u00ed legitimn\u011b a nen\u00ed poznat, \u017ee adresy jsou ve skute\u010dnosti fale\u0161n\u00e9. Proto je d\u016fle\u017eit\u00e9 je rozkliknout a pod\u00edvat se na jejich cel\u00e9 n\u00e1zvy. Podez\u0159el\u00fd je i fakt, \u017ee e-mailov\u00e1 schr\u00e1nka automaticky zpr\u00e1vy za\u0159adila jako spam. Pokud by byly e-maily prav\u00e9, s\u00a0nejv\u011bt\u0161\u00ed pravd\u011bpodobnost\u00ed by takto vyhodnoceny nebyly a p\u0159i\u0161ly by do doru\u010den\u00e9 po\u0161ty. Je v\u0161ak tak\u00e9 mo\u017en\u00e9, \u017ee algoritmus va\u0161\u00ed e-mailov\u00e9 schr\u00e1nky jako b\u011b\u017enou doru\u010denou po\u0161tu vyhodnot\u00ed n\u011bjak\u00e9 podvodn\u00e9 e-maily, proto je d\u016fle\u017eit\u00e9 se zam\u011b\u0159ovat na detaily a m\u00edt se na pozoru.<\/p>\n<p>Dalo by se \u0159\u00edci, \u017ee phishingov\u00e9 metody se ka\u017ed\u00fdm dnem zdokonaluj\u00ed, a proto ji\u017e mnoho fale\u0161n\u00fdch str\u00e1nek a e-mail\u016f vypad\u00e1 pom\u011brn\u011b d\u016fv\u011bryhodn\u011b. Rozd\u00edly se skr\u00fdvaj\u00ed v mali\u010dkostech, a pr\u00e1v\u011b ty mohou b\u00fdt kl\u00ed\u010dov\u00e9 pro bezpe\u010d\u00ed va\u0161ich dat a pen\u011bz. Na z\u00e1v\u011br jsme tedy pro v\u00e1s sestavili jako shrnut\u00ed n\u011bkolik z\u00e1kladn\u00edch bod\u016f, podle kter\u00fdch je obvykle mo\u017en\u00e9 rozpoznat podvodn\u00e9 e-maily \u2013 zpr\u00e1va je t\u00e9m\u011b\u0159 ur\u010dit\u011b fale\u0161n\u00e1, pokud spl\u0148uje alespo\u0148 jednu z n\u00e1sleduj\u00edc\u00edch podm\u00ednek:<\/p>\n<p>&nbsp;<\/p>\n<ul>\n<li>E-mail po v\u00e1s vy\u017eaduje p\u0159ihl\u00e1\u0161en\u00ed nebo platbu<\/li>\n<li>E-mail obsahuje podez\u0159el\u00e9 p\u0159\u00edlohy \u2013 ty za \u017e\u00e1dnou cenu neotv\u00edrejte!<\/li>\n<li>E-mail p\u0159i\u0161el z\u00a0podez\u0159el\u00e9 adresy \u2013 rozklikn\u011bte si detaily zpr\u00e1vy pro celou adresu<\/li>\n<li>Jazykov\u00e9 chyby: \u0161patn\u00e9 p\u0159eklady, pravopisn\u00e9 chyby, stylistick\u00e9 chyby\u2026<\/li>\n<li>Grafick\u00e9 chyby: \u0161patn\u00e9 form\u00e1tov\u00e1n\u00ed, zarovn\u00e1n\u00ed textu, rozmazan\u00e9 obr\u00e1zky\u2026<\/li>\n<li>Detaily: chyby v\u00a0telefonn\u00edch \u010d\u00edslech, chyby v\u00a0p\u0159edvolb\u00e1ch, chybn\u00e9 odkazy str\u00e1nek (op\u011bt nikdy neklikejte na odkazy!)<\/li>\n<li>E-mail nem\u00e1 z\u00a0podstaty v\u011bci d\u016fvod, aby p\u0159i\u0161el \u2013 tzn. sami jste neiniciovali \u017e\u00e1dnou platbu, p\u0159ihl\u00e1\u0161en\u00ed apod.<\/li>\n<\/ul>\n<p>[\/et_pb_text][\/et_pb_column][\/et_pb_row][\/et_pb_section]<\/p>","protected":false},"excerpt":{"rendered":"<p>Podvodn\u00e9 e-maily jsou jednou z\u00a0nejb\u011b\u017en\u011bj\u0161\u00edch forem phishingu a zrovna v\u00a0\u010cesku jsou velmi roz\u0161\u00ed\u0159en\u00e9. Kvalita zpracov\u00e1n\u00ed se st\u00e1le zvy\u0161uje, proto n\u011bkter\u00e9 z\u00a0nich ji\u017e vypadaj\u00ed velmi d\u016fv\u011bryhodn\u011b a jsou tak v\u011bt\u0161\u00ed hrozbou. V\u00a0tomto \u010dl\u00e1nku jsme pro v\u00e1s p\u0159ipravili uk\u00e1zky t\u011bchto e-mail\u016f se znaky, kter\u00e9 umo\u017e\u0148uj\u00ed odhalen\u00ed podvodu. V\u011bt\u0161ina podvodn\u00fdch e-mail\u016f m\u00e1 za c\u00edl z\u00edskat citliv\u00e1 data adres\u00e1t\u016f, [&hellip;]<\/p>","protected":false},"author":1,"featured_media":1679,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_et_pb_use_builder":"on","_et_pb_old_content":"","_et_gb_content_width":"","footnotes":""},"categories":[5,3],"tags":[],"class_list":["post-1678","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-kyberneticka-bezpecnost","category-blog"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v20.9 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Podvodn\u00e9 e-maily a jejich z\u00e1kladn\u00ed znaky - forensee<\/title>\n<meta name=\"description\" content=\"Podvodn\u00e9 e-maily jsou jednou z nejb\u011b\u017en\u011bj\u0161\u00edch forem phishingu. 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