Azure VM • RDP Exposure • Attack Surface
The RDP Port Was Open… And Everyone Could See It
A practical Azure security briefing showing how quickly exposed RDP becomes visible to scanning systems, brute-force attempts and password spray activity across the internet.
This type of exposure is a common issue in security operations visibility, where external attack activity is often detected but not always acted on quickly.
Briefing summary
The VM looked normal at first glance, but a public IP and open RDP port meant it was already being probed from around the world.
Public IP assigned
RDP open on 3389
Global scanning activity
What happened
Internet visibility changes the risk immediately.
The setupA Windows Server VM in Azure was hosting a business application and had a public IP assigned for remote administration.
The exposure
Logs showed thousands of connection attempts from IP addresses around the world, including brute-force activity, password spraying and vulnerability probing.
This is exactly the type of activity surfaced through security operations and log monitoring platforms like Microsoft Sentinel.
Lesson learned
If RDP is open to the world, it will be found. Secure administrative access needs to be engineered, not assumed.
Strong identity and access controls are critical to prevent brute-force access from turning into a real compromise.
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