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Re: [cobalt-security] I've been hacked -- now what do I do?



> Keep in mind that if one trojan is on the system, there's nothing
> stopping the cracker from putting on another.  In my opinion, the
> machine is pretty much untrustable at this point, and requires a
> re-install, or going through a database of known file
> fingerprints/sizes and comparing them to every file on the system.

Indeed.  However, theres two problems here:

a) loadable kernel modules are very hard to detect.  They might be
redirecting and masking file fingerprints.

b) He says he doesn't have tripwire installed, so probably doesn't have a
record of the fingerprints.

The only way to be really sure is a reinstall.  However, upgrading the
kernel and reinstalling all the RPMs (and thus everything like /bin/ls,
netstat, find etc etc) should provide an indication as to the status of
the system.