ncrack

Built by the creators of Nmap, Ncrack is a high-speed network authentication cracking tool. The ncrack tool is one of the few tools that is able to brute-force the Windows RDP protocol reliably and quickly: # ncrack -vv --user offsec -P password-file.txt rdp://10.11.1.35 RDP user with password list ncrack -vv --user offsec -P passwords rdp://10.10.10.10 RDP and SMB), increasing the number of threads may not be possible due to protocol restrictions, making the password guessing process relatively slow. On top of this, protocol authentication negotiations of a protocol such as RDP are more time consuming than, say, HTTP, which slows down the attacks on these protocols even more. However, while brute-forcing the RDP protocol may be a slower process than HTTP, a successful attack on RDP would often provide a bigger reward.