Rising Threat: Hackers Exploit Microsoft Graph for Command-and-Control Operations


Recently, there has been a trend among nation-state espionage groups they are tapping into native Microsoft services for their command-and-control (C2) operations. Surprisingly, different groups, unrelated to each other, have reached the same conclusion that It is smarter to leverage Microsoft’s services instead of creating and managing their own infrastructure. This approach not only saves them money and hassle but also lets their malicious activities blend in more seamlessly with regular network traffic. In this regard, the Microsoft graph plays a major role. 
Microsoft Graph is like a toolbox for developers, offering an interface to connect to various data like emails, calendars, and files stored in Microsoft’s cloud services. While it is harmless in its intended use, it has also become a tool for hackers to set up their command-and-control (C2) infrastructure using these same cloud services. Recently, Symantec found a new type of malware called “BirdyClient” being used against an organization in Ukraine. This malware sneaks into the Graph API to upload and download files through OneDrive. However, we are still waiting to hear from Microsoft about this.   

O’Brien emphasizes that organisations must be vigilant regarding unauthorized cloud account usage. Many individuals access personal accounts, like OneDrive, from work networks, which poses a risk as it makes it harder to detect malicious activities. To mitigate this risk, organizatio

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