{"id":53591,"date":"2019-12-05T00:00:00","date_gmt":"2019-12-04T21:00:00","guid":{"rendered":"https:\/\/prohoster.info\/blog\/blog_prohoster\/kak-zloumyshlenniki-mogut-chitat-vashu-perepisku-v-telegram-i-kak-im-v-etom-pomeshat"},"modified":"2020-02-18T14:01:31","modified_gmt":"2020-02-18T11:01:31","slug":"kak-zloumyshlenniki-mogut-chitat-vashu-perepisku-v-telegram-i-kak-im-v-etom-pomeshat","status":"publish","type":"post","link":"https:\/\/prohoster.info\/hu\/blog\/news\/kak-zloumyshlenniki-mogut-chitat-vashu-perepisku-v-telegram-i-kak-im-v-etom-pomeshat","title":{"rendered":"Hogyan olvass\u00e1k az illet\u00e9ktelenek a Telegram \u00fczeneteidet. \u00c9s hogyan akad\u00e1lyozd meg ezt","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"

\"Hogyan<\/p>\n

2019 v\u00e9g\u00e9n a Group-IB kiberb\u0171n\u00f6z\u00e9si nyomoz\u00f3 r\u00e9szleg\u00e9hez t\u00f6bb orosz v\u00e1llalkoz\u00f3 fordult, akik a Telegram \u00fczenetk\u00fcld\u0151ben l\u00e9v\u0151 levelez\u00e9s\u00fckh\u00f6z val\u00f3 jogosulatlan hozz\u00e1f\u00e9r\u00e9s probl\u00e9m\u00e1j\u00e1val szembes\u00fcltek. Az incidenesek iOS \u00e9s Android eszk\u00f6z\u00f6k\u00f6n t\u00f6rt\u00e9ntek, f\u00fcggetlen\u00fcl att\u00f3l, hogy a s\u00e9rtett melyik szolg\u00e1ltat\u00f3 \u00fcgyfele volt.<\/p>\n

A t\u00e1mad\u00e1s \u00fagy kezd\u0151d\u00f6tt, hogy a felhaszn\u00e1l\u00f3nak egy \u00fczenet \u00e9rkezett a Telegram szolg\u00e1ltat\u00f3csatorn\u00e1j\u00e1t\u00f3l (ez az \u00fczenetk\u00fcld\u0151 hivatalos csatorn\u00e1ja, melyet k\u00e9k pipa igazol), amelyben olyan meger\u0151s\u00edt\u0151 k\u00f3d szerepelt, amit a felhaszn\u00e1l\u00f3 nem k\u00e9rt. Ezt k\u00f6vet\u0151en a s\u00e9rtett okostelefonj\u00e1ra SMS \u00e9rkezett aktiv\u00e1l\u00f3 k\u00f3ddal \u2014 \u00e9s szinte azonnal \u00e9rkezett egy \u00e9rtes\u00edt\u00e9s a Telegram szolg\u00e1ltat\u00f3csatorn\u00e1ra, hogy a fi\u00f3kba bel\u00e9ptek egy \u00faj eszk\u00f6zr\u0151l.<\/a><\/noindex><\/p>\n

\"Hogyan <\/p>\n

A Group-IB \u00e1ltal ismert \u00f6sszes esetben a b\u0171n\u00f6z\u0151k mobilinternet seg\u00edts\u00e9g\u00e9vel l\u00e9ptek be a m\u00e1sok fi\u00f3kj\u00e1ba (val\u00f3sz\u00edn\u0171leg egyszer haszn\u00e1latos SIM-k\u00e1rty\u00e1kat haszn\u00e1ltak), \u00e9s a t\u00e1mad\u00f3k IP-c\u00edme t\u00f6bbnyire Szamar\u00e1ban volt. <\/p>\n

Rendel\u00e9sre k\u00e9sz\u00fclt hozz\u00e1f\u00e9r\u00e9s <\/h3>\n

\nA Group-IB Sz\u00e1m\u00edt\u00f3g\u00e9pes B\u0171n\u00fcgyi Nyomoz\u00f3 Laborat\u00f3rium\u00e1nak vizsg\u00e1lata, amelyhez a s\u00e9rtettek elektronikus eszk\u00f6zeit \u00e1tadt\u00e1k, arra jutott, hogy a technika nem volt fert\u0151zve k\u00e9mprogrammal vagy banki tr\u00f3jai v\u00edrussal, a fi\u00f3kok nem voltak felt\u00f6rve, SIM-k\u00e1rtya cser\u00e9l\u00e9s\u00e9re nem ker\u00fclt sor. Minden esetben a b\u0171n\u00f6z\u0151k SMS-k\u00f3dokat haszn\u00e1ltak a s\u00e9rtett \u00fczenetk\u00fcld\u0151h\u00f6z val\u00f3 hozz\u00e1f\u00e9r\u00e9shez, amelyeket egy \u00faj eszk\u00f6zr\u0151l val\u00f3 bel\u00e9p\u00e9skor kaptak. <\/p>\n

Ez a folyamat a k\u00f6vetkez\u0151k\u00e9ppen zajlik: amikor az \u00fczenetk\u00fcld\u0151t egy \u00faj eszk\u00f6z\u00f6n aktiv\u00e1lj\u00e1k, a Telegram k\u00f3dot k\u00fcld minden felhaszn\u00e1l\u00f3i eszk\u00f6zre a szolg\u00e1ltat\u00f3csatorn\u00e1n kereszt\u00fcl, majd (k\u00e9r\u00e9sre) SMS-t k\u00fcldenek a telefonra. Ezt tudva a b\u0171n\u00f6z\u0151k maguk kezdem\u00e9nyezik az SMS aktiv\u00e1l\u00f3 k\u00f3d k\u00fcld\u00e9s\u00e9nek k\u00e9r\u00e9s\u00e9t az \u00fczenetk\u00fcld\u0151t\u0151l, elfogj\u00e1k ezt az SMS-t, \u00e9s a kapott k\u00f3dot sikeres azonos\u00edt\u00e1sra haszn\u00e1lj\u00e1k az \u00fczenetk\u00fcld\u0151ben. <\/p>\n

\u00cdgy a t\u00e1mad\u00f3k illeg\u00e1lis hozz\u00e1f\u00e9r\u00e9st nyernek el az \u00f6sszes aktu\u00e1lis chathez, kiv\u00e9ve a titkosakat, valamint a chat t\u00f6rt\u00e9net\u00e9hez, bele\u00e9rtve a f\u00e1jlokat \u00e9s f\u00e9nyk\u00e9peket is, amelyeket ezekben \u00e1tk\u00fcldtek. Ezt \u00e9szlelve a Telegram leg\u00e1lis felhaszn\u00e1l\u00f3ja k\u00e9nyszer\u00edtheti a t\u00e1mad\u00f3 munkamenet\u00e9nek lez\u00e1r\u00e1s\u00e1t. A megval\u00f3s\u00edtott v\u00e9delmi mechanizmusnak k\u00f6sz\u00f6nhet\u0151en a t\u00e1mad\u00f3 nem tudja megsz\u00fcntetni a val\u00f3di felhaszn\u00e1l\u00f3 kor\u00e1bbi munkameneteit 24 \u00f3r\u00e1n bel\u00fcl. Ez\u00e9rt fontos id\u0151ben \u00e9szlelni a k\u00fcls\u0151 munkamenetet \u00e9s lez\u00e1rni azt, hogy ne vesz\u00edts\u00fck el a hozz\u00e1f\u00e9r\u00e9st a fi\u00f3khoz. A Group-IB szak\u00e9rt\u0151i \u00e9rtes\u00edt\u00e9st k\u00fcldtek a Telegram csapat\u00e1nak a helyzet kutat\u00e1s\u00e1r\u00f3l.<\/p>\n

Az incidensek vizsg\u00e1lata folyamatban van, \u00e9s jelenleg pontosan nem \u00e1llap\u00edthat\u00f3 meg, hogy milyen jelleg\u0171 rendszert alkalmaztak az SMS-faktor megker\u00fcl\u00e9s\u00e9re. Id\u0151nk\u00e9nt a kutat\u00f3k p\u00e9ld\u00e1kat hoztak fel SMS-ek lehallgat\u00e1s\u00e1ra az SS7 vagy Diameter protokollok t\u00e1mad\u00e1s\u00e1val, amelyeket mobilh\u00e1l\u00f3zatokban haszn\u00e1lnak. Elm\u00e9letileg az ilyen t\u00e1mad\u00e1sok illeg\u00e1lis speci\u00e1lis technikai eszk\u00f6z\u00f6k vagy insider inform\u00e1ci\u00f3k felhaszn\u00e1l\u00e1s\u00e1val val\u00f3s\u00edthat\u00f3k meg a mobilszolg\u00e1ltat\u00f3kn\u00e1l. K\u00fcl\u00f6n\u00f6sen a Darkweb hacker f\u00f3rumain friss hirdet\u00e9sek tal\u00e1lhat\u00f3ak k\u00fcl\u00f6nb\u00f6z\u0151 messengerek, bele\u00e9rtve a Telegram felt\u00f6r\u00e9s\u00e9re vonatkoz\u00f3 aj\u00e1nlatokkal. <\/p>\n

\"Hogyan<\/p>\n

\u201eA szak\u00e9rt\u0151k k\u00fcl\u00f6nb\u00f6z\u0151 orsz\u00e1gokban, k\u00f6zt\u00fck Oroszorsz\u00e1gban t\u00f6bbsz\u00f6r is kijelentett\u00e9k, hogy a k\u00f6z\u00f6ss\u00e9gi h\u00e1l\u00f3zatok, a mobilbanking \u00e9s a messengerek felt\u00f6rhet\u0151k az SS7 protokollban l\u00e9v\u0151 sebezhet\u0151s\u00e9gek r\u00e9v\u00e9n, de ezek egyedi esetek voltak c\u00e9lzott t\u00e1mad\u00e1sok vagy k\u00eds\u00e9rleti kutat\u00e1sok, - komment\u00e1lta Szergej Lupanin, a Group-IB kiberb\u0171n\u00f6z\u00e9si nyomozati r\u00e9szleg\u00e9nek vezet\u0151je, - Az \u00faj incidensek sorozat\u00e1ban, amely m\u00e1r t\u00f6bb mint 10, egy\u00e9rtelm\u0171en megfigyelhet\u0151 a t\u00e1mad\u00f3k sz\u00e1nd\u00e9ka, hogy ezt a bev\u00e9teli m\u00f3dot sorozatgy\u00e1rt\u00e1sba \u00e1ll\u00edts\u00e1k. Annak \u00e9rdek\u00e9ben, hogy ez ne t\u00f6rt\u00e9njen meg, n\u00f6velni kell a digit\u00e1lis higi\u00e9nia saj\u00e1t szintj\u00e9t: legal\u00e1bb haszn\u00e1lni kell a k\u00e9tfaktoros hiteles\u00edt\u00e9st mindenhol, ahol csak lehets\u00e9ges, \u00e9s a SMS-hez k\u00f6telez\u0151 m\u00e1sodik faktort kell hozz\u00e1adni, amely funkcion\u00e1lisan be van \u00e9p\u00edtve a Telegram alkalmaz\u00e1s\u00e1ba is.\u201d<\/p>\n

Hogyan v\u00e9dj\u00fck meg magunkat?<\/h3>\n

\n 1. A Telegram m\u00e1r megval\u00f3s\u00edtotta az \u00f6sszes sz\u00fcks\u00e9ges kiberbiztons\u00e1gi opci\u00f3t, amelyek null\u00e1ra cs\u00f6kkentik a t\u00e1mad\u00f3k er\u0151fesz\u00edt\u00e9seit.
\n 2. iOS \u00e9s Android eszk\u00f6z\u00f6k\u00f6n a Telegramhoz l\u00e9pjen a Telegram be\u00e1ll\u00edt\u00e1saiba, v\u00e1lassza a \"Mag\u00e1n\u00e9let\" f\u00fclet, \u00e9s \u00e1ll\u00edtsa be a \"Felh\u0151 jelsz\u00f3t \u2013 K\u00e9tl\u00e9pcs\u0151s hiteles\u00edt\u00e9st\" vagy a \"Two step verification\"-t. Az opci\u00f3 aktiv\u00e1l\u00e1s\u00e1nak r\u00e9szletes le\u00edr\u00e1sa megtal\u00e1lhat\u00f3 a messenger hivatalos honlapj\u00e1n: telegram.org\/blog\/sessions-and-2-step-verification<\/a><\/noindex> (https:\/\/telegram.org\/blog\/sessions-and-2-step-verification)<\/p>\n

\"Hogyan<\/p>\n

3. Fontos, hogy ne adjon meg e-mail c\u00edmet ennek a jelsz\u00f3nak a vissza\u00e1ll\u00edt\u00e1s\u00e1ra, mivel a jelsz\u00f3 vissza\u00e1ll\u00edt\u00e1sa \u00e1ltal\u00e1ban SMS-en kereszt\u00fcl t\u00f6rt\u00e9nik. Hasonl\u00f3 m\u00f3don n\u00f6velheti a fi\u00f3k biztons\u00e1g\u00e1t a WhatsApp-on is.<\/p>\n

\r\n \"Vide\u00f3\r\n
<\/div>\r\n <\/div><\/center>
\n
Forr\u00e1s: habr.com<\/a><\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"

\u0412 \u043a\u043e\u043d\u0446\u0435 2019 \u0433\u043e\u0434\u0430 \u0432 \u043e\u0442\u0434\u0435\u043b \u0440\u0430\u0441\u0441\u043b\u0435\u0434\u043e\u0432\u0430\u043d\u0438\u0439 \u043a\u0438\u0431\u0435\u0440\u043f\u0440\u0435\u0441\u0442\u0443\u043f\u043b\u0435\u043d\u0438\u0439 Group-IB \u043e\u0431\u0440\u0430\u0442\u0438\u043b\u0438\u0441\u044c \u043d\u0435\u0441\u043a\u043e\u043b\u044c\u043a\u043e \u0440\u043e\u0441\u0441\u0438\u0439\u0441\u043a\u0438\u0445 \u043f\u0440\u0435\u0434\u043f\u0440\u0438\u043d\u0438\u043c\u0430\u0442\u0435\u043b\u0435\u0439, \u043a\u043e\u0442\u043e\u0440\u044b\u0435 \u0441\u0442\u043e\u043b\u043a\u043d\u0443\u043b\u0438\u0441\u044c \u0441 \u043f\u0440\u043e\u0431\u043b\u0435\u043c\u043e\u0439 \u043d\u0435\u0441\u0430\u043d\u043a\u0446\u0438\u043e\u043d\u0438\u0440\u043e\u0432\u0430\u043d\u043d\u043e\u0433\u043e \u0434\u043e\u0441\u0442\u0443\u043f\u0430 \u043d\u0435\u0438\u0437\u0432\u0435\u0441\u0442\u043d\u044b\u0445 \u043a \u0438\u0445 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