Cybersecurity articles tagged #Microsoft Teams on RuntimeRebel.https://runtimerebel.comhttps://runtimerebel.com/blog/microsoft-teams-abuse-the-gentlemen-ransomware-and-phaas-trendshttps://runtimerebel.com/blog/microsoft-teams-abuse-the-gentlemen-ransomware-and-phaas-trendsAnalysis of social engineering campaigns via Microsoft Teams, The Gentlemen ransomware operations, and emerging phishing-as-a-service kits.Fri, 04 Sep 2026 02:00:26 GMTMicrosoft TeamsRansomwarePhishingCredential TheftRMMhttps://runtimerebel.com/blog/spring-ring-voice-phishing-targets-microsoft-teams-usershttps://runtimerebel.com/blog/spring-ring-voice-phishing-targets-microsoft-teams-usersSpring Ring is an ongoing vishing campaign leveraging external Microsoft Teams accounts to impersonate IT support for payload delivery and NTLM relay attacks.Tue, 01 Sep 2026 02:47:23 GMTMicrosoft TeamsVishingSocial EngineeringNTLM RelaySpring Ringhttps://runtimerebel.com/blog/synkloader-malware-steals-credentials-in-microsoft-teams-phishinghttps://runtimerebel.com/blog/synkloader-malware-steals-credentials-in-microsoft-teams-phishingNew SynkLoader malware distributed via Microsoft Teams phishing campaigns uses a fake lock screen to steal Windows credentials, enabling corporate network access.Sat, 22 Aug 2026 00:40:08 GMTMalwarePhishingMicrosoft TeamsCredential TheftRansomwarehttps://runtimerebel.com/blog/etherrat-malware-via-microsoft-teams-it-support-impersonationhttps://runtimerebel.com/blog/etherrat-malware-via-microsoft-teams-it-support-impersonationThreat actors leverage fake IT support calls on Microsoft Teams to deploy EtherRAT malware, gaining initial access to corporate networks.Mon, 06 Jul 2026 21:39:59 GMTEtherRATMicrosoft TeamsSocial EngineeringImpersonationInitial AccessMalwarehttps://runtimerebel.com/blog/microsoft-teams-new-controls-for-ai-bot-meeting-accesshttps://runtimerebel.com/blog/microsoft-teams-new-controls-for-ai-bot-meeting-accessMicrosoft Teams introduces new admin policies requiring organizer approval for external AI bots, enhancing control over automated participants in sensitive meetings.Thu, 02 Jul 2026 07:37:17 GMTMicrosoft TeamsAI BotsMeeting SecurityAccess ControlCloud Securityhttps://runtimerebel.com/blog/microsoft-teams-enhances-meeting-security-with-new-bot-protection-policyhttps://runtimerebel.com/blog/microsoft-teams-enhances-meeting-security-with-new-bot-protection-policyMicrosoft introduces a new admin policy for Teams meetings, preventing unapproved third-party bots from joining, mitigating meeting bombing incidents.Tue, 30 Jun 2026 12:50:08 GMTMicrosoft TeamsBot ProtectionMeeting SecurityAdmin PolicyCloud Securityhttps://runtimerebel.com/blog/kongtuke-exploits-microsoft-teams-for-rapid-corporate-breacheshttps://runtimerebel.com/blog/kongtuke-exploits-microsoft-teams-for-rapid-corporate-breachesInitial access broker KongTuke leverages Microsoft Teams to deploy DarkGate malware, achieving network persistence in under five minutes via social engineering.Thu, 14 May 2026 12:45:59 GMTKongTukeMicrosoft TeamsDarkGateInitial AccessStorm 0324https://runtimerebel.com/blog/muddywater-exploits-microsoft-teams-via-chaos-ransomware-decoyhttps://runtimerebel.com/blog/muddywater-exploits-microsoft-teams-via-chaos-ransomware-decoyIranian APT MuddyWater utilizes Microsoft Teams social engineering and Chaos ransomware decoys to mask state-sponsored espionage operations.Wed, 06 May 2026 16:40:16 GMTMuddyWaterChaos RansomwareMicrosoft TeamsSocial EngineeringMOIShttps://runtimerebel.com/blog/muddywater-exploits-microsoft-teams-for-false-flag-ransomwarehttps://runtimerebel.com/blog/muddywater-exploits-microsoft-teams-for-false-flag-ransomwareIranian APT MuddyWater is leveraging Microsoft Teams social engineering to deploy false flag ransomware, obscuring state-sponsored espionage activities.Wed, 06 May 2026 16:38:58 GMTMuddyWaterMicrosoft TeamsRansomwareAPTSocial Engineeringhttps://runtimerebel.com/blog/microsoft-teams-free-backend-change-disrupts-chat-and-callinghttps://runtimerebel.com/blog/microsoft-teams-free-backend-change-disrupts-chat-and-callingMicrosoft confirms a backend configuration change has broken core functionality for Microsoft Teams Free users, impacting global business communication.Wed, 29 Apr 2026 08:53:02 GMTMicrosoft TeamsSaaS OutageCloud AvailabilityMicrosoft 365Business Continuityhttps://runtimerebel.com/blog/unc6692-leverages-teams-aws-s3-for-malware-cloud-abusehttps://runtimerebel.com/blog/unc6692-leverages-teams-aws-s3-for-malware-cloud-abuseNewly discovered threat actor UNC6692 combines social engineering via Microsoft Teams with custom 'Snow' malware and AWS S3 cloud abuse in multi-pronged attacks.Mon, 27 Apr 2026 20:30:32 GMTUNC6692Microsoft TeamsAWS S3SNOW MalwareSocial EngineeringCloud AbuseThreat Actorhttps://runtimerebel.com/blog/unc6692-targets-microsoft-teams-to-deploy-snow-malwarehttps://runtimerebel.com/blog/unc6692-targets-microsoft-teams-to-deploy-snow-malwareUNC6692 is leveraging Microsoft Teams and social engineering to deliver the modular Snow malware suite, facilitating long-term persistence and data theft.Sat, 25 Apr 2026 16:17:06 GMTUNC6692Microsoft TeamsSNOW MalwareSocial EngineeringBackdoorPersistencehttps://runtimerebel.com/blog/unc6692-social-engineering-deploying-the-snow-custom-malware-suitehttps://runtimerebel.com/blog/unc6692-social-engineering-deploying-the-snow-custom-malware-suiteUNC6692 leverages Microsoft Teams and S3-hosted payloads to deploy the SNOW modular malware ecosystem, targeting enterprise Windows environments.Fri, 24 Apr 2026 08:51:05 GMTUNC6692SNOWBELTSNOWGLAZESNOWBASINMicrosoft TeamsSocial Engineeringhttps://runtimerebel.com/blog/unc6692-impersonates-it-helpdesk-to-deploy-snow-malware-via-teamshttps://runtimerebel.com/blog/unc6692-impersonates-it-helpdesk-to-deploy-snow-malware-via-teamsUNC6692 threat actors are impersonating IT helpdesk staff via Microsoft Teams to deliver custom SNOW malware, highlighting risks in SaaS messaging apps.Thu, 23 Apr 2026 20:25:10 GMTUNC6692Microsoft TeamsSNOW MalwareSocial Engineeringhttps://runtimerebel.com/blog/microsoft-teams-efficiency-mode-optimizing-resource-usage-for-pcshttps://runtimerebel.com/blog/microsoft-teams-efficiency-mode-optimizing-resource-usage-for-pcsMicrosoft introduces Efficiency Mode for Teams to reduce CPU and memory consumption on resource-constrained devices, improving overall system responsiveness.Wed, 22 Apr 2026 12:31:39 GMTMicrosoft TeamsWindows 11Performance OptimizationEndpoint Securityhttps://runtimerebel.com/blog/microsoft-teams-abused-in-helpdesk-impersonation-attacks-ttps-mitigationshttps://runtimerebel.com/blog/microsoft-teams-abused-in-helpdesk-impersonation-attacks-ttps-mitigationsMicrosoft warns of helpdesk impersonation attacks via Teams external collaboration.Mon, 20 Apr 2026 16:32:32 GMTMicrosoft TeamsImpersonationSocial EngineeringHelpdeskPhishingIdentity AccessMicrosoft 365External Collaborationhttps://runtimerebel.com/blog/edge-update-breaks-microsoft-teams-right-click-paste-functionalityhttps://runtimerebel.com/blog/edge-update-breaks-microsoft-teams-right-click-paste-functionalityA recent Microsoft Edge browser update has disabled the right-click paste feature in the Microsoft Teams desktop client, impacting global user productivity.Sat, 18 Apr 2026 16:15:55 GMTMicrosoft TeamsMicrosoft EdgeClipboard BugWebview2Productivity Losshttps://runtimerebel.com/blog/kb5085516-emergency-update-fix-for-microsoft-account-sign-in-failureshttps://runtimerebel.com/blog/kb5085516-emergency-update-fix-for-microsoft-account-sign-in-failuresMicrosoft releases emergency KB5085516 update to resolve widespread authentication failures affecting OneDrive, Teams, and other cloud-integrated services.Mon, 23 Mar 2026 08:25:36 GMTKB5085516Microsoft AccountAuthentication ErrorWindows UpdateIdentity ManagementMicrosoft Teamshttps://runtimerebel.com/blog/kb5079473-update-breaks-microsoft-account-sign-ins-on-windows-11https://runtimerebel.com/blog/kb5079473-update-breaks-microsoft-account-sign-ins-on-windows-11Microsoft confirms the KB5079473 March update for Windows 11 disrupts sign-ins for Teams and OneDrive. Technical analysis and remediation for affected systems.Fri, 20 Mar 2026 08:18:16 GMTKB5079473Windows 11Microsoft TeamsAuthenticationOneDrivehttps://runtimerebel.com/blog/microsoft-teams-phishing-deploys-a0backdoor-via-quick-assisthttps://runtimerebel.com/blog/microsoft-teams-phishing-deploys-a0backdoor-via-quick-assistAttackers are targeting healthcare and finance employees with Microsoft Teams phishing to deploy A0Backdoor using the native Windows Quick Assist tool.Tue, 10 Mar 2026 00:31:34 GMTMicrosoft TeamsA0BackdoorQuick AssistSocial EngineeringHealthcareFinancial Serviceshttps://runtimerebel.com/blog/microsoft-teams-third-party-bot-tagging-enhances-meeting-securityhttps://runtimerebel.com/blog/microsoft-teams-third-party-bot-tagging-enhances-meeting-securityMicrosoft Teams updates meeting lobbies to identify third-party bots, helping administrators prevent unauthorized data collection and social engineering.Mon, 09 Mar 2026 20:12:50 GMTMicrosoft TeamsMeeting SecurityThird Party BotsSocial EngineeringData Privacy