nxc-vnc: add page (#14380)

pages/common/nxc-vnc.md

@@ -0,0 +1,16 @@
+# nxc vnc
+
+> Pentest and exploit VNC servers.
+> More information: <https://www.netexec.wiki/>.
+
+- Search for valid credentials by trying out every combination in the specified lists of [u]sernames and [p]asswords:
+
+`nxc vnc {{192.168.178.2}} -u {{path/to/usernames.txt}} -p {{path/to/passwords.txt}}`
+
+- Avoid rate limiting through VNC-sleep:
+
+`nxc vnc {{192.168.178.2}} -u {{{path/to/usernames.txt}}} -p {{path/to/passwords.txt}} --vnc-sleep {{10}}`
+
+- Take a screenshot on the remote system after waiting the specified amount of time:
+
+`nxc vnc {{192.168.178.2}} -u {{{username}}} -p {{password}} --screenshot --screentime {{10}}`