RDP stands for Remote Desktop Protocol and is the protocol for
Windows Remote Desktop and Terminal Server. It is sometimes used for remote
user access to servers, but very commonly used for remote administrator access.
RDP "remotes" the Windows UI, allowing a remote user with an RDP
client to log into Windows and use it as if local.
A brute force RDP attack would scan IP ranges and TCP port
ranges (the default being 3389) for RDP servers, which could be either client
or server systems. Once an attacker finds an RDP server, he would attempt to
log on, particularly as Administrator. The IDS in Kaspersky products will now
detect this type of attack as Bruteforce.Generic.RDP. Read more.