Sophisticated Campaign Targets Microsoft Teams Users With Oyster Malware

Cybersecurity researchers have uncovered a cyberattack method that illustrates the growing sophistication of modern malvertising campaigns. This new wave of attacks sees threat actors leverage SEO poisoning techniques and search engine advertisements to lure unsuspecting users into downloading fake Microsoft Teams installers. These deceptive downloads ultimately infect Windows systems with the Oyster backdoor, providing attackers with a foothold inside corporate environments.