I think I may be infected with something, possibly a botnet client. Recently I've noticed steady stream of outbound traffic (aprox 300 - 500Kbps) originating from my PC. Each time the destination IP is different and not one I recognise.
I consider myself an intermediate user. I've scanned with AVG anti virus and nothing comes up. Also scanned with Spybot S&D & Malwarebytes - again both clean.
The last "attack" was earlier today, and I ran these programs during the attack but it didn't find anything. I've also got RUBotted from Trend installed but that failed to pick anything up.
The stream of outgoing traffic usually happens in the afternoon on a Monday or Friday (from what I've seen) which makes me think it's possibly a botnet client but so far, I can't find any trace of it!
Here is part of a Wireshark capture taken from today's attack - https://dl.dropbox.com/u/69515152/Capture.pcapng
In order to break the connection I either have to reboot the router or shut down the connection to my PC for several minutes.
OS is Windows 7 x64.
Please help - it's driving me insane not knowing what's causing it.
Edited by soreilly, 01 March 2013 - 04:26 PM.