Once Bropia infects a system, it resides in the memory and continues spreading through MSN Messenger. Bropia is a member of the Rbot family of worms affecting the Windows platform, which installs a back door on the system and gives an attacker a way of accessing and controlling the infected system remotely. That would allow unauthorized remote access to the infected computer via specific IRC channels while running in the background as a service process.
But there is more: the new Bropia is loaded with a Bot virus component that opens the 1294 port. It is believes that attack orders can be received on this port.