Microsoft Teams
Microsoft blames macOS update for undismissible Teams location prompts
Microsoft has confirmed user reports that the Teams team collaboration app is displaying non-dismissible location prompts on some macOS systems. According to affected Teams users, these non-dismissible prompts have been appearing on Mac devices running macOS versions 14 (Sonoma), 15 (Sequoia), and 26 (Tahoe) over the past week, asking for permission to use their location “for things […]
KongTuke hackers now use Microsoft Teams for corporate breaches
Initial access broker KongTuke has moved to Microsoft Teams for social engineering attacks, taking as little as five minutes to gain persistent access to corporate networks. The threat actor tricks users into pasting a PowerShell command that ultimately delivers the ModeloRAT, which has been previously seen in ClickFix attacks [1, 2]. Initial access brokers (IAB) like […]
Microsoft says backend change broke Teams Free chat and calls
Microsoft is working to resolve a known issue that prevents some Microsoft Teams Free users from chatting and calling others. Teams Free (also known as Teams for personal use) is a subscription-free version designed for individuals, families, and small community groups, which provides video conferencing, instant messaging, and collaborative file-sharing tools on mobile and desktop […]
Threat actor uses Microsoft Teams to deploy new “Snow” malware
A threat group tracked as UNC6692 uses social engineering to deploy a new, custom malware suite named “Snow,” which includes a browser extension, a tunneler, and a backdoor. Their goal is to steal sensitive data after deep network compromise through credential theft and domain takeover. According to Google’s Mandiant researchers, the attacker uses “email bombing” tactics to […]
Microsoft Teams to get efficiency mode on PCs with limited resources
Microsoft is preparing to roll out a new Efficiency Mode for Microsoft Teams for systems with limited CPU and memory resources to improve app responsiveness. As the company explained in a Tuesday message center update (MC1287373), this new performance-optimized experience will be enabled by default on eligible devices and will also improve meeting quality by […]
Microsoft: Teams increasingly abused in helpdesk impersonation attacks
Microsoft is warning of threat actors increasingly abusing external Microsoft Teams collaboration and relying on legitimate tools for access and lateral movement on enterprise networks. The hackers impersonate IT or helpdesk staff to contact employees through cross-tenant chats and trick them into providing remote access for data theft purposes. Microsoft has observed multiple intrusions with […]
Microsoft pulls service update causing Teams launch failures
Microsoft has reverted a recent service update that was preventing some customers from launching the Microsoft Teams desktop client. Affected users are getting stuck on the loading screen and seeing the “We’re having trouble loading your message. Try refreshing.” error message. On Friday morning, after acknowledging the incident (tracked under TM1283300), Microsoft said the launch failures […]
Microsoft Teams right-click paste broken by Edge update bug
Microsoft is warning that a recent Microsoft Edge browser update introduced a bug that breaks right-click paste in chats in the Microsoft Teams desktop client. In an advisory published on April 14, Microsoft says users are reporting that they are unable to paste URLs, text, or images into Teams chats when using right-click context menus, with the […]
Microsoft fixes Outlook Classic crashes caused by Teams Meeting add-in
Microsoft has resolved a known issue that rendered the classic Outlook email client unusable for users who enabled the Microsoft Teams Meeting Add-in. The bug was first reported on March 12, when affected Microsoft 365 customers began experiencing Outlook crashes and prompts to start it in safe mode. Microsoft acknowledged the issue nearly a week later in […]
New KB5085516 emergency update fixes Microsoft account sign-in
Microsoft has released an emergency update to address a major issue that breaks sign-ins with Microsoft accounts across multiple Microsoft apps, including Teams and OneDrive. This issue appears after installing the KB5079473 cumulative update that Microsoft released as part of this month’s Patch Tuesday, and it warns users that the affected devices are not connected to the […]