IT Support
Microsoft Teams vishing attacks lead to Chaos ransomware attacks
Threat actors are impersonating IT support staff in Microsoft Teams calls to gain remote access to corporate devices and deploy Chaos ransomware in attacks targeting North American organizations. Sophos tracks the campaign as STAC4749 and says it targeted dozens of organizations between February and June 2026. At least three of these intrusions led to the […]
Fake IT support calls on Microsoft Teams push EtherRAT malware
Threat actors are abusing Microsoft Teams voice calls by impersonating corporate IT support staff to trick employees into installing the EtherRAT malware, giving attackers initial access to corporate networks. The campaign, reported by Palo Alto Networks’ Unit 42, combines phishing emails, Microsoft Teams voice calls, legitimate remote management tools, and a Node.js-based malware loader to […]
FBI warns of in-person data theft attacks from extortion gang
The FBI warned on Tuesday that the Silent Ransom Group (SRG) extortion gang is now targeting U.S.-based law firms in in-person data theft attacks. “As of Spring 2026, SRG actors use a social engineering scheme to pose as an employee from the victim’s IT department. SRG actors either directly call or send phishing emails to […]
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 […]