Security News > 2023 > August > Russian hackers target govt orgs in Microsoft Teams phishing attacks
Microsoft says a hacking group tracked as APT29 and linked to Russia's Foreign Intelligence Service targeted dozens of organizations worldwide, including government agencies, in Microsoft Teams phishing attacks.
These new domains were part of the 'onmicrosoft.com' domain, a legitimate Microsoft domain that is automatically used by Microsoft 365 for fallback purposes in case a custom domain is not created.
"In some cases, the actor attempts to add a device to the organization as a managed device via Microsoft Entra ID, likely an attempt to circumvent conditional access policies configured to restrict access to specific resources to managed devices only," Microsoft added.
Last month, Microsoft refused to address a security issue in Microsoft Teams that can let anyone bypass restrictions for incoming files from external tenants using a Python tool named TeamsPhisher, developed by Alex Reid, a U.S. Navy's Red team member.
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