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Threat actors are using legitimate Microsoft feature to compromise M365 accounts


Threat actors are exploiting Microsoft Device Code Authentication to trick targets into granting them access to their M365 accounts.

“It appears that these Russian threat actors have made a concerted effort to launch several campaigns against organizations with a goal of simultaneously abusing this method before the targets catch on and implement countermeasures.” The attackers usually impersonate US, Ukrainian, and EU government officials or researchers at prominent institutions, and reach out to the targets via social media or messaging apps such as Signal. Microsoft has also spotted them sending additional phishing messages containing links for Device Code Authentication from the compormised account to other users in the target organization.

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