{"id":6862,"date":"2021-03-22T10:05:59","date_gmt":"2021-03-22T10:05:59","guid":{"rendered":"https:\/\/198.27.90.141\/?p=6862"},"modified":"2026-09-29T18:36:41","modified_gmt":"2026-09-29T18:36:41","slug":"o-que-e-spoofing-de-e-mail","status":"publish","type":"post","link":"https:\/\/gatefy.com\/pt-br\/blog\/o-que-e-spoofing-de-e-mail\/","title":{"rendered":"O que \u00e9 spoofing de e-mail e por que ele \u00e9 uma amea\u00e7a para o seu neg\u00f3cio"},"content":{"rendered":"<p>O spoofing de e-mail \u00e9 uma t\u00e9cnica usada por cibercriminosos para aplicar golpes e amea\u00e7ar a seguran\u00e7a do seu e-mail. O spoofing de e-mail acontece quando um fraudador cria falsos endere\u00e7os de remetente para enganar as suas v\u00edtimas. \u00c9 uma t\u00e1tica amplamente usada em campanhas de\u00a0<a href=\"https:\/\/gatefy.com\/pt-br\/blog\/o-que-e-phishing\/\" target=\"_blank\" rel=\"noopener\">phishing<\/a>,\u00a0<a href=\"https:\/\/gatefy.com\/pt-br\/blog\/o-que-e-spear-phishing\/\" target=\"_blank\" rel=\"noopener\">spear phishing<\/a>\u00a0e <a href=\"https:\/\/gatefy.com\/pt-br\/blog\/como-o-spam-prejudica-sua-empresa\/\" target=\"_blank\" rel=\"noopener\">spam<\/a>.<\/p>\n<p>O spoofing de e-mail \u00e9 poss\u00edvel porque o envio de mensagens \u00e9 baseado no protocolo SMTP, que n\u00e3o possui mecanismos avan\u00e7ados de autentica\u00e7\u00e3o. \u00c9 por isso que os criminosos podem se identificar como pertencentes ao dom\u00ednio de outra pessoa.<\/p>\n<p>Em outras palavras, eles podem usar o dom\u00ednio da sua empresa para aplicar golpes e voc\u00ea nem saber\u00e1 disso.<\/p>\n<h2>Como o e-mail spoofing funciona<\/h2>\n<p>O spoofing \u00e9 usado para v\u00e1rios fins. Imagine que algu\u00e9m esteja usando o dom\u00ednio falso de um banco, exigindo que voc\u00ea atualize as informa\u00e7\u00f5es da sua conta. Caso contr\u00e1rio, voc\u00ea poder\u00e1 perder o acesso a ela. Mas, para fazer isso, primeiro voc\u00ea precisa fornecer o seu login e a sua senha.<\/p>\n<p>Outro exemplo: voc\u00ea recebe um e-mail de uma oferta especial imperd\u00edvel da sua loja de roupas favorita. Ent\u00e3o, voc\u00ea clica no banner da promo\u00e7\u00e3o, acessa o site, que \u00e9 uma vers\u00e3o falsa, e faz uma compra falsa usando o seu cart\u00e3o de cr\u00e9dito. Sim, eles agora t\u00eam as suas informa\u00e7\u00f5es de cart\u00e3o de cr\u00e9dito.<\/p>\n<p>Tamb\u00e9m \u00e9 poss\u00edvel que o cibercriminoso envie um link ou anexo malicioso com o objetivo de infectar o seu dispositivo com um v\u00edrus, trojan ou\u00a0<a href=\"https:\/\/gatefy.com\/pt-br\/blog\/o-que-e-malware\/\" target=\"_blank\" rel=\"noopener\">malware<\/a>. Depois o hacker pode acessar e controlar a sua m\u00e1quina.<\/p>\n<p>Em fraudes mais elaboradas, o invasor vai personificar algu\u00e9m que voc\u00ea conhece, como o seu chefe ou uma empresa com a qual voc\u00ea faz neg\u00f3cios regularmente, para solicitar uma transfer\u00eancia eletr\u00f4nica ou o pagamento de fatura. Este \u00e9 um golpe de spear phishing.<\/p>\n<h2>Solu\u00e7\u00f5es: SPF, DKIM e DMARC<\/h2>\n<p>Existem ferramentas para minimizar os riscos de falsifica\u00e7\u00e3o de e-mails e aprimorar a seguran\u00e7a da sua rede. Os protocolos de autentica\u00e7\u00e3o\u00a0<a href=\"https:\/\/gatefy.com\/pt-br\/blog\/o-que-e-spf-sender-policy-framework\/\" target=\"_blank\" rel=\"noopener\">SPF (Sender Policy Framework)<\/a>,\u00a0<a href=\"https:\/\/gatefy.com\/pt-br\/blog\/o-que-e-dkim-domainkeys-identified-mail\/\" target=\"_blank\" rel=\"noopener\">DKIM (Domain Keys Identified Mail)<\/a>\u00a0e\u00a0<a href=\"https:\/\/gatefy.com\/pt-br\/blog\/o-que-e-dmarc\/\" target=\"_blank\" rel=\"noopener\">DMARC (Domain-based Message Authentication, Reporting &amp; Conformance)<\/a>\u00a0trabalham justamente para aumentar a prote\u00e7\u00e3o de sua rede de e-mail.<\/p>\n<p>Basicamente, o SPF, o DKMI e o DMARC funcionam para impedir que outros servidores enviem e-mails usando o seu dom\u00ednio. Idealmente, para prote\u00e7\u00e3o m\u00e1xima, a sua empresa deveria utilizar os tr\u00eas protocolos em conjunto.<\/p>\n<h2>Secure Email Gateway (SEG)<\/h2>\n<p>Um bom software de\u00a0<a href=\"https:\/\/gatefy.com\/pt-br\/blog\/o-que-e-um-secure-email-gateway-seg\/\" target=\"_blank\" rel=\"noopener\">Secure Email Gateway<\/a>\u00a0vai ajud\u00e1-lo na configura\u00e7\u00e3o desses tipos de protocolos. Al\u00e9m disso, um SEG possui outras ferramentas para manter a sua empresa protegida e o seu e-mail seguro, como, por exemplo, antispam, antiv\u00edrus e sandbox.<\/p>\n<h2>Como se prevenir de falsifica\u00e7\u00e3o de e-mail<\/h2>\n<p>O FBI recomenda algumas medidas de seguran\u00e7a para evitar a falsifica\u00e7\u00e3o e aumentar a prote\u00e7\u00e3o do seu e-mail, como:<\/p>\n<p>\u2022 Suspeite de e-mails que exigem informa\u00e7\u00f5es confidenciais.<br \/>\u2022 Evite preencher formul\u00e1rios em mensagens de e-mail.<br \/>\u2022 Verifique\u00a0<a href=\"https:\/\/gatefy.com\/pt-br\/blog\/o-que-e-url-maliciosa\/\" target=\"_blank\" rel=\"noopener\">URLs<\/a>\u00a0e anexos antes de clicar neles.<br \/>\u2022 Se voc\u00ea precisa\u00a0atualizar uma conta, fa\u00e7a o login diretamente no site da empresa.<br \/>\u2022 Em caso de d\u00favida, verifique a veracidade da mensagem por outros meios, como, por exemplo, via telefone ou atrav\u00e9s do suporte oficial ao cliente da empresa. Se a mensagem for aparentemente de algu\u00e9m que voc\u00ea conhece, entre em contato para confirmar a veracidade criando um novo e-mail e enviando-o para um endere\u00e7o que voc\u00ea sabe ser leg\u00edtimo. N\u00e3o clique em &#8220;Responder&#8221;.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>O spoofing de e-mail \u00e9 uma t\u00e9cnica usada por cibercriminosos para aplicar golpes e amea\u00e7ar a seguran\u00e7a do seu e-mail. O spoofing de e-mail acontece quando um fraudador cria falsos endere\u00e7os de remetente para enganar as suas v\u00edtimas. \u00c9 uma t\u00e1tica amplamente usada em campanhas de\u00a0phishing,\u00a0spear phishing\u00a0e spam. O spoofing de e-mail \u00e9 poss\u00edvel porque [&hellip;]<\/p>\n","protected":false},"author":4,"featured_media":6863,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[2,37],"tags":[],"class_list":["post-6862","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-blog","category-educacao"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.6 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Spoofing de e-mail: o que \u00e9 e por que \u00e9 uma amea\u00e7a cibern\u00e9tica - Gatefy<\/title>\n<meta name=\"description\" content=\"A falsifica\u00e7\u00e3o de e-mail \u00e9 uma t\u00e9cnica usada por cibercriminosos para aplicar golpes e amea\u00e7ar a prote\u00e7\u00e3o do seu e-mail. 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