# 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. --- # Agent Instructions: Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on the current page URL with the `ask` query parameter: ``` GET https://www.hackbook.io/privilege-escalation/passwords/ncrack.md?ask= ``` The question should be specific, self-contained, and written in natural language. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.