Microsoft Teams Under Siege: How Hackers Are Breaching UK Computers

Microsoft Teams has become an unexpected battleground in the fight against cybercrime. Russian hackers are now leveraging this popular collaboration tool to deceive UK employees into granting remote access. Sophos’ research reveals alarming trends, including the impersonation of IT support workers and the use of email bombing to create chaos. This blog examines how cybercriminal groups like STAC5143 and STAC5777 operate, their connection to ransomware attacks, and why Teams’ default settings are leaving organizations vulnerable. Learn about proactive steps to safeguard your company, from restricting external communications to disabling unused remote access tools.