Fake Microsoft Teams Installers Push Oyster Malware via Malvertising

Fake Microsoft Teams installers push Oyster malware via malvertising

Hackers have been spotted using SEO poisoning and search engine advertisements to promote fake Microsoft Teams installers that infect Windows devices with the Oyster backdoor, providing initial access to corporate networks.

Hackers use Weaponized Microsoft Teams Installer to Compromise Systems With Oyster Malware

A sophisticated malvertising campaign is using fake Microsoft Teams installers to compromise corporate systems, leveraging poisoned search engine results and abused code-signing certificates to deliver the Oyster backdoor malware. The attack was neutralized by Microsoft Defender’s Attack Surface Reduction (ASR) rules, which blocked the malware from establishing contact with its command-and-control server. The multi-stage attack […] The post Hack…

Hackers use Weaponized Microsoft Teams Installer to Compromise Systems With Oyster Malware - Cybernoz - Cybersecurity News

A sophisticated malvertising campaign is using fake Microsoft Teams installers to compromise corporate systems, leveraging poisoned search engine results and abused code-signing certificates to deliver the Oyster backdoor malware. The attack was neutralized by Microsoft Defender’s Attack Surface Reduction (ASR) rules, which blocked the malware from establishing contact with its command-and-control server. The multi-stage attack highlights an inc…