Port 9088

[Todd Meister <todd () LMI NET>]

A couple threads on this list have mentioned port 9088 as either the default
port for an exploit (rpc.statd), or just a generally preferred port for
rootshells.

I know that many of the residential DSL customers on my network use Linux, and
many of them have default installs that have never been updated, so I did some
portscanning (nmap -sT -p 9088 <network>/<mask>).  I found more hosts than I'd
expected reporting something like:

Interesting ports on hax0red.whoopsie.com (10.0.0.3):
Port    State       Protocol  Service
9088    filtered    tcp       unknown

All of them are filtered.

I see two possibilities -- the cracker in question is using ipchains or
something similar to secure the rootshell against other barbarian hordlings, or
perhaps there is some service that actually runs at 9088.

So my question is, is there some software or other that listens on this port,
or is there a pretty good chance that every IP reporting an open port 9088 has
been compromised?  Is there a way of testing, even though nmap reports the port
as filtered?

Thanks for any help,

Todd