Rule Category

OS-WINDOWS -- Snort has detected traffic targeting vulnerabilities in a Windows-based operating system. This does not include browser traffic or other software on the OS, but attacks against the OS itself. (such as?)

Alert Message

OS-WINDOWS Microsoft Windows Terminal server RDP over non-standard port attempt

Rule Explanation

This event is generated when an attempt to bypass RDP and get lateral access to other devices, has been detected Impact: High Details: An attacker can get access to several devices using a compromised Windows computer that is located behind a Firewall that allows RDP access (configured previously by the Firewall administrator) to that computer. The attacker can force the victim computer to forward RDP requests to other internal computers or servers in an attempt to move laterally inside the victim network Ease of Attack: Medium. It will require already access to a compromised computer inside the target network

What To Look For

Known Usage

No public information

False Positives

No known false positives


Cisco Talos Intelligence Group

MITRE ATT&CK Framework



For reference, see the MITRE ATT&CK vulnerability types here:

Additional Links

CVE Additional Information