{"id":6199,"date":"2026-08-05T05:27:57","date_gmt":"2026-08-05T05:27:57","guid":{"rendered":"https:\/\/windowsreport.com\/pt\/greatness-phishing-service-imita-ringcentral-para-roubar-contas-microsoft-365\/"},"modified":"2026-08-05T05:27:57","modified_gmt":"2026-08-05T05:27:57","slug":"greatness-phishing-service-imita-ringcentral-para-roubar-contas-microsoft-365","status":"publish","type":"post","link":"https:\/\/windowsreport.com\/pt\/greatness-phishing-service-imita-ringcentral-para-roubar-contas-microsoft-365\/","title":{"rendered":"Greatness Phishing Service imita RingCentral para roubar contas Microsoft 365"},"content":{"rendered":"\n

O servi\u00e7o de phishing Greatness agora finge ser a RingCentral para roubar contas do Microsoft 365 por meio de ataques do tipo advers\u00e1rio no meio e de c\u00f3digo de dispositivo.<\/p>\n\n\n\n

Inicialmente, o Greatness funcionava como um servi\u00e7o de phishing tradicional de roubo de credenciais. Desde ent\u00e3o, evoluiu para uma plataforma mais ampla que pode capturar tokens de autentica\u00e7\u00e3o e contornar algumas formas de autentica\u00e7\u00e3o multifator.<\/p>\n\n\n\n

As campanhas t\u00eam como alvo principal utilizadores nos Estados Unidos, Canad\u00e1, Reino Unido, Austr\u00e1lia e \u00c1frica do Sul. A plataforma tamb\u00e9m se expandiu para al\u00e9m do Microsoft 365, passando a suportar ataques contra contas do iCloud, Yahoo e Google Workspace.<\/p>\n\n\n\n

Invasores fingem ser notifica\u00e7\u00f5es da RingCentral<\/h2>\n\n\n\n

Pesquisadores do ZeroBEC<\/a> observaram operadores do Greatness a explorar o estatuto de confian\u00e7a da RingCentral para contornar prote\u00e7\u00f5es de seguran\u00e7a de e-mail.<\/p>\n\n\n\n

Os invasores falsificaram o endere\u00e7o service@ringcentral[.]com e enviaram e-mails maliciosos para clientes leg\u00edtimos da RingCentral. As mensagens apareciam como notifica\u00e7\u00f5es de correio de voz ou alertas de revis\u00e3o de desempenho de funcion\u00e1rios.<\/p>\n\n\n\n

Cada e-mail inclu\u00eda um aviso falso a alegar que o remetente tinha recebido aprova\u00e7\u00e3o atrav\u00e9s da lista de remetentes seguros da organiza\u00e7\u00e3o. Esta mensagem fazia os e-mails parecerem mais confi\u00e1veis e incentivava os destinat\u00e1rios a clicar num bot\u00e3o incorporado.<\/p>\n\n\n\n

De acordo com o ZeroBEC, o Microsoft Exchange atribuiu \u00e0s mensagens um N\u00edvel de Confian\u00e7a de Spam de -1. Essa classifica\u00e7\u00e3o permitiu que os e-mails evitassem a filtragem normal de spam.<\/p>\n\n\n\n

Greatness rouba tokens de autentica\u00e7\u00e3o do Microsoft 365<\/h3>\n\n\n\n

Clicar no bot\u00e3o malicioso redirecionava as v\u00edtimas para a infraestrutura controlada pelos operadores do Greatness.<\/p>\n\n\n\n

Algumas v\u00edtimas chegavam a uma p\u00e1gina de phishing do tipo advers\u00e1rio no meio da Microsoft. A p\u00e1gina capturava tokens de autentica\u00e7\u00e3o depois de o utilizador concluir um pedido de MFA.<\/p>\n\n\n\n

Outras v\u00edtimas entravam num processo de phishing de c\u00f3digo de dispositivo, que as persuadia a autorizar uma sess\u00e3o controlada pelo invasor atrav\u00e9s do sistema de autentica\u00e7\u00e3o leg\u00edtimo da Microsoft.<\/p>\n\n\n\n

Depois de obter acesso, os invasores reutilizavam tokens roubados do Microsoft 365 atrav\u00e9s de servidores privados virtuais e servi\u00e7os de VPN comerciais. Isto permitia-lhes entrar nas contas comprometidas sem precisarem de outro in\u00edcio de sess\u00e3o padr\u00e3o.<\/p>\n\n\n\n

Invasores vasculham e-mails, conversas do Teams e ficheiros na nuvem<\/h3>\n\n\n\n

Os invasores vasculhavam caixas de correio do Outlook e conversas do Microsoft Teams ap\u00f3s comprometerem uma conta.<\/p>\n\n\n\n

Tamb\u00e9m acediam a sites do SharePoint, ficheiros do OneDrive, contactos, calend\u00e1rios e aplica\u00e7\u00f5es registadas. Grande parte das informa\u00e7\u00f5es era recolhida atrav\u00e9s do Microsoft Graph.<\/p>\n\n\n\n

Em alguns casos, o acesso n\u00e3o autorizado permaneceu ativo por mais de duas semanas, dando tempo para que os invasores procurassem informa\u00e7\u00f5es comerciais confidenciais e identificassem alvos adicionais.<\/p>\n\n\n\n

Pesquisadores examinam poss\u00edvel liga\u00e7\u00e3o a viola\u00e7\u00e3o da RingCentral<\/h3>\n\n\n\n

A RingCentral confirmou recentemente uma viola\u00e7\u00e3o de dados separada, reivindicada pelo grupo de amea\u00e7as ShinyHunters. A empresa informou que o incidente afetou informa\u00e7\u00f5es pertencentes a um n\u00famero limitado de clientes e que estava a contact\u00e1-los diretamente.<\/p>\n\n\n\n

O ZeroBEC acredita que os utilizadores do Greatness possam ter obtido uma lista de clientes v\u00e1lidos da RingCentral a partir dessa viola\u00e7\u00e3o. No entanto, os pesquisadores n\u00e3o conseguiram confirmar uma liga\u00e7\u00e3o direta entre os incidentes.<\/p>\n\n\n\n

As organiza\u00e7\u00f5es devem rever as listas de permiss\u00f5es de e-mail<\/h3>\n\n\n\n

As equipas de seguran\u00e7a devem rever as listas de remetentes seguros e as listas de permiss\u00f5es de e-mail em busca de exce\u00e7\u00f5es excessivamente amplas. As organiza\u00e7\u00f5es devem substituir exclus\u00f5es gen\u00e9ricas de dom\u00ednio por regras que tamb\u00e9m exijam autentica\u00e7\u00e3o SPF, DKIM e DMARC v\u00e1lida.<\/p>\n\n\n\n

Os administradores tamb\u00e9m devem investigar in\u00edcios de sess\u00e3o incomuns do Microsoft 365 aprovados por MFA provenientes de fornecedores de alojamento, servidores privados virtuais ou endere\u00e7os de VPN comerciais.<\/p>\n\n\n\n

Quando os administradores suspeitam de um comprometimento, devem revogar imediatamente o acesso ativo e os tokens de atualiza\u00e7\u00e3o. Devem igualmente rever permiss\u00f5es OAuth, atividade do Microsoft Graph, aplica\u00e7\u00f5es registadas e o acesso em todos os servi\u00e7os do Microsoft 365.<\/p>\n\n\n\n

Noutras not\u00edcias de seguran\u00e7a, a Microsoft descobriu uma campanha global de malware em Wi-Fi de hot\u00e9is<\/a> e limitou a validade das chaves de API do NuGet para 30 dias<\/a>.<\/p>\n\n\n\n

O malware tamb\u00e9m descobriu novas t\u00e9cnicas que podem roubar chaves de acesso do Google<\/a>, levantando preocupa\u00e7\u00f5es adicionais sobre a seguran\u00e7a dos sistemas de autentica\u00e7\u00e3o sem palavra-passe.<\/p>\n\n\n\n

Via BleepingComputer<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"

O servi\u00e7o de phishing Greatness agora finge ser a RingCentral para roubar contas do Microsoft 365 por meio de ataques do tipo advers\u00e1rio no meio e de c\u00f3digo de dispositivo. Inicialmente, o Greatness funcionava como um servi\u00e7o de phishing tradicional de roubo de credenciais. Desde ent\u00e3o, evoluiu para uma plataforma mais ampla que pode capturar […]<\/p>\n","protected":false},"author":49,"featured_media":6200,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"_enabled_clarity":"","footnotes":""},"categories":[55],"tags":[],"work":[],"class_list":["post-6199","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-tutoriais"],"acf":[],"yoast_head":"\nGreatness Phishing Service imita RingCentral para roubar contas Microsoft 365 - WindowsReport PT (Portuguese)<\/title>\n<meta name=\"description\" content=\"Atacantes do grupo Greatness falsificam alertas do RingCentral para roubar tokens do Microsoft 365 atrav\u00e9s de ataques AiTM e de phishing por c\u00f3digo de dispositivo\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/windowsreport.com\/pt\/greatness-phishing-service-imita-ringcentral-para-roubar-contas-microsoft-365\/\" \/>\n<meta property=\"og:locale\" content=\"pt_PT\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Greatness Phishing Service imita RingCentral para roubar contas Microsoft 365\" \/>\n<meta property=\"og:description\" content=\"Atacantes do grupo Greatness falsificam alertas do RingCentral para roubar tokens do Microsoft 365 atrav\u00e9s de ataques AiTM e de phishing por c\u00f3digo de dispositivo\" \/>\n<meta property=\"og:url\" content=\"https:\/\/windowsreport.com\/pt\/greatness-phishing-service-imita-ringcentral-para-roubar-contas-microsoft-365\/\" \/>\n<meta property=\"og:site_name\" content=\"WindowsReport PT (Portuguese)\" \/>\n<meta property=\"article:published_time\" content=\"2026-08-05T05:27:57+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/windowsreport.com\/pt\/wp-content\/uploads\/sites\/2\/2026\/08\/tycoon2fa-microsoft-365.jpg\" \/>\n\t<meta property=\"og:image:width\" content=\"1280\" \/>\n\t<meta property=\"og:image:height\" content=\"801\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/jpeg\" \/>\n<meta name=\"author\" content=\"Milan Stanojevic\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:creator\" content=\"@MilanStanojev17\" \/>\n<meta name=\"twitter:label1\" content=\"Escrito por\" \/>\n\t<meta name=\"twitter:data1\" content=\"Milan Stanojevic\" \/>\n\t<meta name=\"twitter:label2\" content=\"Tempo estimado de leitura\" \/>\n\t<meta name=\"twitter:data2\" content=\"4 minutos\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\\\/\\\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\\\/\\\/windowsreport.com\\\/pt\\\/greatness-phishing-service-imita-ringcentral-para-roubar-contas-microsoft-365\\\/#article\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/windowsreport.com\\\/pt\\\/greatness-phishing-service-imita-ringcentral-para-roubar-contas-microsoft-365\\\/\"},\"author\":{\"name\":\"Milan Stanojevic\",\"@id\":\"https:\\\/\\\/windowsreport.com\\\/pt\\\/#\\\/schema\\\/person\\\/e3910b02e4592db47a0eb303765a3a25\"},\"headline\":\"Greatness Phishing Service imita RingCentral para roubar contas Microsoft 365\",\"datePublished\":\"2026-08-05T05:27:57+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\\\/\\\/windowsreport.com\\\/pt\\\/greatness-phishing-service-imita-ringcentral-para-roubar-contas-microsoft-365\\\/\"},\"wordCount\":789,\"commentCount\":0,\"publisher\":{\"@id\":\"https:\\\/\\\/windowsreport.com\\\/pt\\\/#organization\"},\"image\":{\"@id\":\"https:\\\/\\\/windowsreport.com\\\/pt\\\/greatness-phishing-service-imita-ringcentral-para-roubar-contas-microsoft-365\\\/#primaryimage\"},\"thumbnailUrl\":\"https:\\\/\\\/windowsreport.com\\\/pt\\\/wp-content\\\/uploads\\\/sites\\\/2\\\/2026\\\/08\\\/tycoon2fa-microsoft-365.jpg\",\"articleSection\":[\"Tutoriais\"],\"inLanguage\":\"pt-PT\",\"potentialAction\":[{\"@type\":\"CommentAction\",\"name\":\"Comment\",\"target\":[\"https:\\\/\\\/windowsreport.com\\\/pt\\\/greatness-phishing-service-imita-ringcentral-para-roubar-contas-microsoft-365\\\/#respond\"]}],\"copyrightYear\":\"2026\",\"copyrightHolder\":{\"@id\":\"https:\\\/\\\/windowsreport.com\\\/#organization\"}},{\"@type\":\"WebPage\",\"@id\":\"https:\\\/\\\/windowsreport.com\\\/pt\\\/greatness-phishing-service-imita-ringcentral-para-roubar-contas-microsoft-365\\\/\",\"url\":\"https:\\\/\\\/windowsreport.com\\\/pt\\\/greatness-phishing-service-imita-ringcentral-para-roubar-contas-microsoft-365\\\/\",\"name\":\"Greatness Phishing Service imita RingCentral para roubar contas Microsoft 365 - 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