fechar
fechar
Sua Rede do Amanhã
Sua Rede do Amanhã
Planeje seu caminho rumo a uma rede mais rápida, segura e resiliente projetada para os aplicativos e usuários aos quais você oferece suporte.
          Experimente a Netskope
          Coloque a mão na massa com a plataforma Netskope
          Esta é a sua chance de experimentar a plataforma de nuvem única do Netskope One em primeira mão. Inscreva-se em laboratórios práticos e individualizados, junte-se a nós para demonstrações mensais de produtos ao vivo, faça um test drive gratuito do Netskope Private Access ou participe de workshops ao vivo conduzidos por instrutores.
            Líder em SSE. Agora é líder em SASE de fornecedor único.
            Líder em SSE. Agora é líder em SASE de fornecedor único.
            A Netskope estreia como líder no Quadrante Mágico™ do Gartner® para Single-Vendor SASE
              Protegendo a IA generativa para leigos
              Protegendo a IA generativa para leigos
              Saiba como sua organização pode equilibrar o potencial inovador da IA generativa com práticas robustas de segurança de dados.
                E-book moderno sobre prevenção de perda de dados (DLP) para leigos
                Prevenção Contra Perda de Dados (DLP) Moderna para Leigos
                Obtenha dicas e truques para fazer a transição para um DLP fornecido na nuvem.
                  Livro SD-WAN moderno para SASE Dummies
                  SD-WAN moderno para leigos em SASE
                  Pare de brincar com sua arquitetura de rede
                    Compreendendo onde estão os riscos
                    O Advanced Analytics transforma a maneira como as equipes de operações de segurança aplicam insights orientados por dados para implementar políticas melhores. Com o Advanced Analytics, o senhor pode identificar tendências, concentrar-se em áreas de preocupação e usar os dados para tomar medidas.
                        Os 6 casos de uso mais atraentes para substituição completa de VPN herdada
                        Os 6 casos de uso mais atraentes para substituição completa de VPN herdada
                        O Netskope One Private Access é a única solução que permite que o senhor aposente sua VPN definitivamente.
                          A Colgate-Palmolive protege sua “propriedade intelectual "” com proteção de dados inteligente e adaptável
                          A Colgate-Palmolive protege sua “propriedade intelectual "” com proteção de dados inteligente e adaptável
                            Netskope GovCloud
                            Netskope obtém alta autorização do FedRAMP
                            Escolha o Netskope GovCloud para acelerar a transformação de sua agência.
                              Vamos fazer grandes coisas juntos
                              A estratégia de comercialização da Netskope, focada em Parcerias, permite que nossos Parceiros maximizem seu crescimento e lucratividade enquanto transformam a segurança corporativa.
                                Netskope solutions
                                Netskope Cloud Exchange
                                O Netskope Cloud Exchange (CE) oferece aos clientes ferramentas de integração poderosas para alavancar os investimentos em toda a postura de segurança.
                                  Suporte Técnico Netskope
                                  Suporte Técnico Netskope
                                  Nossos engenheiros de suporte qualificados estão localizados em todo o mundo e têm diversas experiências em segurança de nuvem, rede, virtualização, fornecimento de conteúdo e desenvolvimento de software, garantindo assistência técnica de qualidade e em tempo hábil.
                                    Vídeo da Netskope
                                    Treinamento Netskope
                                    Os treinamentos da Netskope vão ajudar você a ser um especialista em segurança na nuvem. Conte conosco para ajudá-lo a proteger a sua jornada de transformação digital e aproveitar ao máximo as suas aplicações na nuvem, na web e privadas.

                                      Amazon-themed PDF Phishing, Abusing LinkedIn and Twitter, Targets Microsoft Live Outlook Users

                                      Oct 26 2023

                                      Summary

                                      In August 2023, Netskope Threat Labs highlighted an increase in downloads of PDF phishing attachments in Microsoft Live Outlook, caused by a series of phishing campaigns targeting users of the email service. We took a closer look and found that these campaigns are mostly Amazon-themed scams with a few Apple and IRS-themed phishing attempts sprinkled throughout. Just like in our previously reported phishing blog posts, attackers are abusing free services in these campaigns. In this campaign, they abuse conversion trackers and redirectors to evade detection. Additionally these campaigns specifically targeted personal Microsoft Live Outlook accounts in North America, Southern Europe, and Asia. Let’s take a closer look at the details of these campaigns:

                                      Amazon-themed phishing campaign

                                      Netskope Threat Labs recently analyzed the cause of an increase in malware downloads from Microsoft Live Outlook and found that a major contributor was a variety of Amazon-themed phishing PDF attachments. The sender purports to be a member of the Amazon support team notifying recipients that their account has been suspended due to incorrect billing information. In order to supposedly rectify the situation, the users need to update their billing information by clicking the hyperlink. The attacker is abusing different redirectors with URL shorteners to hide the actual malicious URL and evade detection.

                                      Some of the phishing links used in these campaigns lead to a compromised website that mimics PayPal’s page, where they ask users to fill up personal information and credit card details.

                                      In some of the other scam campaigns we analyzed, even though the PDF attachment is requesting their targets to re-enter their Amazon billing information, some of the links redirect to other sites unrelated to Amazon, like login pages for Ionos and Netflix.

                                      A small subset of phishing PDF attachments we analyzed purport to be from Apple and used similar social engineering tactics and the same redirector domains and URL shorteners. Another phishing campaign uses an IRS-themed scam, claiming that the recipient has a tax refund that can be collected when they click the link. These campaigns also used social media redirectors, like Linkedin Smart Links and Twitter, as well as free ecommerce marketing email services to evade detection. Let’s dig a bit deeper into how attackers used these redirectors:

                                      LinkedIn Smart Links and Twitter used as redirectors

                                      The attackers on these phishing campaigns are abusing social media platforms LinkedIn and Twitter as redirectors to the phishing websites. Attackers abuse LinkedIn Smart Links, which is a feature to package and share files and websites to prospects and customers. However they were abused to redirect targets to phishing websites. Using both LinkedIn Smart Links and Twitter as redirectors can help bypass email scanners and can also provide insights about the users who click on the malicious links, which might be useful to them in their future phishing campaigns.

                                      QR Code Generator Used As a URL Shortener

                                      Another redirector service these phishing campaigns use is QR Code Generator PRO. This is a free online tool that allows users to generate QR codes to open different resources. For these campaigns, attackers only abuse the URL shortening feature, not the QR code itself. To shorten a URL using this tool, you have to create a website QR code type and input the malicious website as the resource. Once the QR code is created, instead of sharing the code, you can instead share the generated shortened URL.

                                      Abusing free ecommerce marketing email services

                                      These phishing campaigns abused e-commerce platforms’ click tracking domains to serve the redirectors that lead to the phishing sites. From the samples collected by Netskope Threat Labs, Klavio and Privy were the most commonly abused platforms. Both platforms provide free trial usage, which makes it lucrative to attackers, who often take advantage of free services. We suspect that attackers also leverage the visibility these platforms provide, using the insights to improve targeting.

                                      Conclusions

                                      These PDF phishing campaigns are targeting personal Microsoft Live Outlook accounts and are using the common social engineering technique of creating an urgent call to action. They abuse legitimate redirector domains and URL shorteners like Twitter, LinkedIn, and QR Code Generator PRO to evade detection. Phishing attacks like this can be avoided by never entering sensitive information (like passwords or banking details) after clicking on a link. Instead, you should always browse directly to the sites in question. For example, if you believe there is a billing issue with your Amazon account, login directly to amazon.com to verify.  Netskope Threat Labs will continue to track and respond to this set of phishing campaigns.

                                      Recommendations

                                      Netskope Threat Labs recommends that organizations review their security policies to ensure that they are adequately protected against these and similar phishing pages and scams:

                                      • Inspect all HTTP and HTTPS traffic, including all web and cloud traffic, to prevent users from visiting malicious websites. Netskope customers can configure their Netskope NG-SWG with a URL filtering policy to block known phishing and scam sites, and a threat protection policy to inspect all web content to identify unknown phishing and scam sites using a combination of signatures, threat intelligence, and machine learning.
                                      • Use Remote Browser Isolation (RBI) technology to provide additional protection when there is a need to visit websites that fall in categories that can present higher risk, like Newly Observed and Newly Registered Domains.

                                      IOCs

                                      All the URLs  related to these campaigns can be found in our GitHub repository.

                                      author image
                                      Jan Michael Alcantara
                                      Jan Michael Alcantara is an experienced incident responder with a background on forensics, threat hunting, and incident analysis.
                                      Jan Michael Alcantara is an experienced incident responder with a background on forensics, threat hunting, and incident analysis.

                                      Mantenha-se informado!

                                      Assine para receber as últimas novidades do Blog da Netskope