{"id":73923,"date":"2020-03-12T20:42:15","date_gmt":"2020-03-12T17:42:15","guid":{"rendered":"https:\/\/prohoster.info\/blog\/novosti-interneta\/google-predstavil-blokirovshhik-podstanovki-vvoda-cherez-vredonosnye-usb-ustrojstva"},"modified":"2020-03-12T20:42:15","modified_gmt":"2020-03-12T17:42:15","slug":"google-predstavil-blokirovshhik-podstanovki-vvoda-cherez-vredonosnye-usb-ustrojstva","status":"publish","type":"post","link":"https:\/\/prohoster.info\/da\/blog\/news\/google-predstavil-blokirovshhik-podstanovki-vvoda-cherez-vredonosnye-usb-ustrojstva","title":{"rendered":"Google har pr\u00e6senteret en blokering af inputsubstitution gennem skadelige USB-enheder","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"

Google offentliggjorde<\/a><\/noindex> v\u00e6rkt\u00f8jet ukip<\/a><\/noindex>, der muligg\u00f8r overv\u00e5gning og blokering angreb<\/a><\/noindex>, udf\u00f8rt ved hj\u00e6lp af ondsindede USB-enheder, der simulerer et USB-tastatur for skjult indtastning af falske tastetryk (f.eks. kan der i l\u00f8bet af et angreb v\u00e6re simuleret<\/a><\/noindex> en sekvens af tastetryk, der f\u00f8rer til \u00e5bningen af et terminalvindue og udf\u00f8relsen af vilk\u00e5rlige kommandoer). Koden er skrevet i Python og distribueres<\/a><\/noindex> er under Apache 2.0-licensen. <\/p>\n

v\u00e6rkt\u00f8jet k\u00f8rer som en systemd-tjeneste og kan fungere i tilstandsmonitorering og angrebsforebyggelse. I overv\u00e5gningsmode registreres mulige angreb og logges aktivitet relateret til fors\u00f8g p\u00e5 at bruge USB-enheder forkert til indtastning. I beskyttelsesmode, n\u00e5r et potentielt skadeligt enhed opdages, frakobles det fra systemet p\u00e5 driverniveau. <\/p>\n

Skadelig aktivitet identificeres baseret p\u00e5 heuristisk analyse af arten af input og forsinkelsen mellem tastetryk \u2014 angrebet udf\u00f8res normalt i n\u00e6rv\u00e6r af brugeren, og for at det skal forblive uset, sendes de simulerede tastetryk med us\u00e6dvanlige minimale forsinkelser, der ikke svarer til normal tastaturindgang. To indstillinger er foresl\u00e5et til at \u00e6ndre logikken for angrebsidentifikation: KEYSTROKE_WINDOW (den f\u00f8rste bestemmer antallet af tastetryk til analyse) og ABNORMAL_TYPING (den anden s\u00e6tter t\u00e6rskelintervallet mellem tastetryk).<\/p>\n

Et angreb kan udf\u00f8res ved hj\u00e6lp af en uskyldig enhed med modificeret firmware, f.eks. kan et tastatur simuleres i USB-drev<\/a><\/noindex>, USB-hub<\/a><\/noindex>, webkamera<\/a><\/noindex> eller smartphone<\/a><\/noindex> (i Kali NetHunter<\/a><\/noindex> der tilbydes et specialv\u00e6rkt\u00f8j til indtastningssubstitution med en smartphone tilsluttet USB-porten, der k\u00f8rer p\u00e5 Android-platformen). For at komplicere angreb via USB kan man udover ukip ogs\u00e5 anvende pakken USBGuard<\/a><\/noindex>, der tillader tilslutning af enheder kun fra hvidlisten eller blokerer muligheden for at tilslutte fremmede USB-enheder under l\u00e5sesk\u00e6rmen og forhindrer brug af s\u00e5danne enheder efter at brugeren er vendt tilbage.<\/p>\n

<\/a><\/noindex><\/p>\n

Kilde: opennet.ru<\/a><\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"

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