{"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\/pt\/blog\/news\/google-predstavil-blokirovshhik-podstanovki-vvoda-cherez-vredonosnye-usb-ustrojstva","title":{"rendered":"O Google apresentou um bloqueador de inser\u00e7\u00e3o de input atrav\u00e9s de dispositivos USB maliciosos","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"

A empresa Google publicou<\/a><\/noindex> uma ferramenta ukip<\/a><\/noindex>, permitindo rastrear e bloquear ataques<\/a><\/noindex>, realizados com o uso de dispositivos USB maliciosos que simulam um teclado USB para a inser\u00e7\u00e3o oculta de toques de tecla falsos (por exemplo, durante um ataque, pode ser simulada<\/a><\/noindex> uma sequ\u00eancia de toques que leva \u00e0 abertura de um terminal e \u00e0 execu\u00e7\u00e3o de comandos arbitr\u00e1rios). O c\u00f3digo \u00e9 escrito na linguagem Python e \u00e9 distribu\u00eddo<\/a><\/noindex> est\u00e3o sob a licen\u00e7a Apache 2.0. <\/p>\n

O utilit\u00e1rio \u00e9 executado na forma de um servi\u00e7o systemd e pode operar nos modos de monitoramento e preven\u00e7\u00e3o de ataques. No modo de monitoramento, s\u00e3o identificados poss\u00edveis ataques e registradas as atividades relacionadas a tentativas de uso indevido de dispositivos USB para substitui\u00e7\u00e3o de entrada. No modo de prote\u00e7\u00e3o, ao identificar um dispositivo potencialmente malicioso, ele \u00e9 desconectado do sistema no n\u00edvel do driver. <\/p>\n

Atividade maliciosa \u00e9 identificada com base na an\u00e1lise heur\u00edstica do tipo de entrada e dos intervalos entre as teclas pressionadas \u2014 o ataque geralmente ocorre na presen\u00e7a do usu\u00e1rio e, para permanecer despercebido, as entradas simuladas s\u00e3o enviadas com intervalos m\u00ednimos at\u00edpicos em compara\u00e7\u00e3o com a digita\u00e7\u00e3o normal. Para alterar a l\u00f3gica de identifica\u00e7\u00e3o de ataques, foram propostas duas configura\u00e7\u00f5es: KEYSTROKE_WINDOW e ABNORMAL_TYPING (a primeira determina o n\u00famero de pressionamentos para an\u00e1lise e a segunda, o intervalo de limiar entre as teclas).<\/p>\n

Um ataque pode ser realizado por meio de um dispositivo que n\u00e3o levanta suspeitas e que tem um firmware modificado, por exemplo, uma simula\u00e7\u00e3o de teclado pode ser feita em um pen drive USB<\/a><\/noindex>, hub USB<\/a><\/noindex>, webcam<\/a><\/noindex> ou smartphone<\/a><\/noindex> (no Kali NetHunter<\/a><\/noindex> uma ferramenta especial para substitui\u00e7\u00e3o de entrada a partir de um smartphone conectado a uma porta USB sob a plataforma Android). Para dificultar os ataques via USB, al\u00e9m do ukip, tamb\u00e9m \u00e9 poss\u00edvel usar o pacote USBGuard<\/a><\/noindex>, que permite a conex\u00e3o de dispositivos apenas a partir de uma lista branca ou bloqueia a possibilidade de conectar dispositivos USB externos durante o bloqueio da tela e n\u00e3o permite o uso desses dispositivos ap\u00f3s o retorno do usu\u00e1rio.<\/p>\n

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

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

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