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Trend Micro detecta Malware ‘GODLESS’ que afeta dispositivos Android


Fonte: http://blog.trendmicro.com.br


A Trend Micro divulgou recentemente a existência de um malware denominado Godless (detectado como ANDROIDOS_GODLESS.HRX) que pode comprometer praticamente qualquer dispositivo Android 5.1 (Lollipop) ou versão anterior.

A ameaça conta ainda com vários exploit kits, o que torna os dispositivos ainda mais vulneráveis. Segundo a Trend Micro, no momento, a estimativa é de que quase 90% dos aparelhos Android estão sendo executados com versões afetadas.

Com base nos dados coletados pelo Trend Micro Mobile App Reputation Service, aplicativos maliciosos relacionados à esta ameaça podem ser encontrados em lojas como o Google Play, e já afetaram mais de 850.000 aparelhos em todo o mundo.

O Godless é derivado de um exploit kit e utiliza um software para fazer root – ou seja, tornar – se um administrador do sistema e ter acesso às partes do Android que antes ficavam inacessíveis para um usuário comum –, chamado android-rooting-tools. Este framework tem em seu arsenal vários exploits que podem ser usados para erradicar dispositivos com sistema Android.

As duas vulnerabilidades mais avançadas usadas pelo exploit kit são o CVE-2015-3636 (utilizada pelo exploit PingPongRoot) e o CVE-2014-3153 (utilizada pelo exploit Towelroot).  Os exploits restantes estão obsoletos e são relativamente desconhecidos, até mesmo na comunidade de segurança.

Segundo análise da Trend Micro, o malware pode receber instruções remotas sobre qual aplicativo baixar e instalar silenciosamente em dispositivos móveis. Esta variante do Godless busca remotamente uma payload – código malicioso que o malware faz o download -, e instala um backdoor com acesso raiz para o download de aplicativos nos dispositivos afetados.

Dispositivos móveis afetados globalmente

godless

A figura acima mostra a distribuição global dos dispositivos afetados

Melhores Práticas

O enraizamento de um dispositivo móvel pode gerar vários benefícios em termos de desempenho. No entanto, quando um malware aplica tal método, o dono do aparelho pode ter seus dados seriamente prejudicados.

A Trend Micro listou abaixo algumas dicas para evitar o ciberataque por meio de malwares em dispositivos móveis:

  • Sempre analisar as informações e classificações relacionadas aos aplicativos;
  • Aplicativos com pouca ou nenhuma informação de fundo podem ser fontes de versões maliciosas;
  • É recomendado sempre que possível fazer o download de aplicativos por meio de fontes confiáveis como Google Play ou Amazon;
  • Usuários devem ter um aplicativo de segurança móvel seguro.

A Trend Micro informou ao Google sobre os aplicativos mencionados e foram tomadas as medidas adequadas.

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