/etc/services on a few machines I've checked, port 9898 is associated with a service called MonkeyCom:
monkeycom 9898/udp # MonkeyCom monkeycom 9898/tcp # MonkeyCom
The first reference I found in a google search for MonkeyCom says it's part of the Sasser virus. That seems like a misinterpretation to me -- it's more likely that Sasser is using 9898 but that there's some older service called MonkeyCom which originally got the assignment.
Who can tell me what MonkeyCom is?