Over the period of about a month, all our VPN laptops seem to be getting infected with what must be a rootkit of unknown origin. McAfee, SpyBot and SpySweeper can't seem to find any bugs, but our IDS has been alerting me to these symptoms: ICMP Ping, L3 Retriever Ping, NETBIOS SMB IPC$ share access. At first the suspect computer will start generating ICMP pings, then L3retriever pings and finally it will try to SMB to our fileserver. It's like a virus is spreading from laptop to laptop. I asked some CISSP guys and they suspected a rootkit of unknown origin.
Attached is a HijackThis log from one of the laptops.
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