Windows Remote Desktop Protocol Detection Scanner

Windows Remote Desktop Protocol (RDP) is a proprietary protocol developed by Microsoft, which provides a user with a graphical interface to connect to another computer over a network connection. Users employ RDP clients for this purpose, while the other computer must run RDP server software. Commonly used for remote administration and management, it facilitates various operations across different Windows operating systems. Organizations and IT professionals often employ it to perform tasks on remote computers without needing physical presence. The protocol is utilized across diverse industries, making it essential in fields that require secure and efficient remote connectivity.

This scanner detects the presence of the Remote Desktop Protocol on networked systems. Detecting RDP usage is crucial as it can hint towards potential areas needing tighter security configurations, especially against unauthorized remote access. The scanner identifies multiple Windows versions through specific hexadecimal responses that match RDP's presence on those systems. By pinpointing the active use of RDP, the tool aids in understanding network exposure, assisting IT personnel in evaluating the associated risks. Regular detection ensures that systems using RDP are scrutinized for vulnerabilities and security postures are evaluated.

The detection is performed by sending predefined hexadecimal data packets to a target’s RDP port, typically 3389. Based on the response, specific patterns associated with various Windows operating systems are matched, confirming the presence of RDP. The words within the response, encoded in hex, allow identification of the OS version. Matchers in the scanner recognize responses that verify RDP's availability and the Windows version, such as win2003, win2008, or win10. This detection method is non-intrusive and efficiently recognizes active RDP instances on networks without establishing a full connection.

If RDP is left exposed or improperly secured, it may allow unauthorized access to systems, leading to data breaches, malware injection, or complete control over affected machines. Malicious actors can exploit weak RDP configurations to perform lateral movement within a network, elevate privileges, or simply disrupt operations. Thus, regularly scanning for and addressing RDP utilization helps mitigate such security risks. Security teams should focus on hardening RDP implementations and ensure it is enabled only when necessary.