{"id":167268,"date":"2026-04-03T11:12:02","date_gmt":"2026-04-03T09:12:03","guid":{"rendered":"https:\/\/prohoster.info\/blog\/novosti-interneta\/neoficzialnyj-telegram-klient-nekogram-otpravlyal-nomera-telefonov-botu-razrabotchika"},"modified":"2026-04-03T11:12:02","modified_gmt":"2026-04-03T09:12:03","slug":"neoficzialnyj-telegram-klient-nekogram-otpravlyal-nomera-telefonov-botu-razrabotchika","status":"publish","type":"post","link":"https:\/\/prohoster.info\/pt\/blog\/news\/neoficzialnyj-telegram-klient-nekogram-otpravlyal-nomera-telefonov-botu-razrabotchika","title":{"rendered":"O cliente Telegram n\u00e3o oficial Nekogram enviou n\u00fameros de telefone para o bot do desenvolvedor.","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"

Foi identificado um c\u00f3digo ofuscado no cliente n\u00e3o oficial do Telegram, Nekogram, que envia de forma oculta ao bot «@nekonotificationbot» os n\u00fameros de telefone dos usu\u00e1rios que acessam o aplicativo, vinculados ao identificador do usu\u00e1rio. A modifica\u00e7\u00e3o para coletar n\u00fameros de telefone est\u00e1 presente apenas nos pacotes APK prontos, distribu\u00eddos via Google Play, GitHub e no canal Telegram do projeto. No c\u00f3digo fonte no GitHub e no pacote APK do cat\u00e1logo F-Droid, a altera\u00e7\u00e3o para coleta de telefones est\u00e1 ausente. <\/p>\n

A backdoor estava presente no arquivo Extra.java. Supostamente, o envio ocorreu a partir da vers\u00e3o 11.2.3 do Nekogram, inicialmente apenas para usu\u00e1rios com n\u00fameros chineses, e depois para todos. O programa tamb\u00e9m utilizava bots osint «@tgdb_search_bot» e «@usinfobot» para identificar usu\u00e1rios por seus IDs, mas os n\u00fameros de telefone n\u00e3o eram enviados a eles. \"O <\/p>\n

Pesquisadores prepararam um hook em Java e um bot que permitem que qualquer usu\u00e1rio verifique o envio dos n\u00fameros de telefone pela sua inst\u00e2ncia do aplicativo. \"O <\/p>\n

Na opini\u00e3o dos pesquisadores que identificaram o problema, os autores do programa poderiam usar as informa\u00e7\u00f5es obtidas para formar um banco de dados para venda futura a criadores de bots OSINT. A inten\u00e7\u00e3o de ocultar tal atividade \u00e9 evidenciada pela ofusca\u00e7\u00e3o das altera\u00e7\u00f5es e pelo uso de consultas inline para enviar dados. Ap\u00f3s a divulga\u00e7\u00e3o do problema no sistema de rastreamento de erros do projeto, o autor do Nekogram reconheceu o envio dos n\u00fameros de telefone ao seu bot, sem explicar as raz\u00f5es dessa atividade, mas mencionando que os n\u00fameros enviados n\u00e3o eram salvos nem transmitidos a terceiros. <\/p>\n

Al\u00e9m disso, pode-se observar a descoberta de uma vulnerabilidade no aplicativo oficial do Telegram. O projeto Zero Day Initiative (ZDI), que oferece recompensas financeiras por relat\u00f3rios de vulnerabilidades n\u00e3o corrigidas, publicou dados preliminares sobre a vulnerabilidade ZDI-CAN-30207 no Telegram, classificando-a com um n\u00edvel cr\u00edtico de risco (9.8 em 10) e indicando que \u00e9 uma amea\u00e7a remota, n\u00e3o requerendo a\u00e7\u00e3o do usu\u00e1rio. Os detalhes devem ser revelados no dia 24 de julho, dando tempo aos desenvolvedores do Telegram para corrigir o problema para os usu\u00e1rios. <\/p>\n

Houve informa\u00e7\u00f5es de que a vulnerabilidade se manifesta ao abrir adesivos animados especialmente formatados no Telegram e pode resultar na execu\u00e7\u00e3o de c\u00f3digo por um invasor sem qualquer a\u00e7\u00e3o por parte do usu\u00e1rio. Aparentemente, a vulnerabilidade \u00e9 causada por um erro no c\u00f3digo da biblioteca rlottie, que \u00e9 respons\u00e1vel pela visualiza\u00e7\u00e3o. <\/p>\n

Representantes do Telegram afirmaram que n\u00e3o consideram o problema identificado uma vulnerabilidade perigosa, pois todos os adesivos carregados s\u00e3o pr\u00e9-verificados para servidores<\/a> o Telegram e essa verifica\u00e7\u00e3o impediria a exibi\u00e7\u00e3o de adesivos maliciosos aos usu\u00e1rios. Ap\u00f3s a declara\u00e7\u00e3o do Telegram, o n\u00edvel de gravidade da vulnerabilidade foi reduzido de 9.8 para 7.0.
\n
Fonte: opennet.ru<\/a> <\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"

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