Azure Outlook C2 – Unveiling Remote Control Of Windows Devices Via Outlook Mailbox

Azure Outlook Command And Control that uses Microsoft Graph API for C2 communications And data exfiltration.

The intriguing world of ‘Azure Outlook C2,’ a cutting-edge cybersecurity development that leverages the power of the Microsoft Graph API for command and control (C2) communications and data exfiltration.

In this article, we delve into the capabilities and implications of this novel approach, created by cybersecurity experts Bobby Cooke and Paul Ungur.

Discover how attackers can remotely control compromised Windows devices from within an Outlook mailbox, and gain insights into the latest threats, defense strategies, and the evolution of this C2 technique.

CTI Threat Update (02/13/22)

Elastic Security Labs has discovered active intrusions in the wild using SIESTAGRAPH. SIESTAGRAPH interacts with Microsoft’s GraphAPI for command and control using Outlook and OneDrive.

Check out their awesome malware analysis blogs on Azure Outlook C2 communications below.

Update (09/27/21)

• Azure Outlook C2 now has a cross-platform Graphical User Interface (GUI)!
  • Big shoutout to Paul Ungur (@C5pider) for teaching me how to create a C2 GUI with QT!

Controlling A Computer Via Outlook Mailbox With The C2 GUI

Controlling A Computer Via Outlook Mailbox

• The update supports original Outlook Mailbox control.

If you have any information about similar projects, CTI info about this TTP being used in the wild by APT/ransomware-groups, defense advice, recommendations for Red Teamers interested in Azure C2 threat emulation, or any other information that would be a good add to this blog/readme, please contact me or submit a Pull Request. Thank you!

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