Tom Haines on 23 Feb 2012 15:42:48 -0800


[Date Prev] [Date Next] [Thread Prev] [Thread Next] [Date Index] [Thread Index]

[PLUG] Hacked server - recovery

You definitely want to run something like rkhunter to see what happened. My policy has always been to wipe the box and rebuild completely from backups. It's not worth risking that rkhunter missed something. 

On Thursday, February 23, 2012, Eric at Lucii.org wrote:
-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1

I'm trying to recover an Ubuntu-based web server that was hacked.
It was/is running a 2.x version of OpenRealty that contains more
vulnerabilities than I could imagine.

The hacker used it to send spam (no surprise.)  I was in a hurry
so to stop it I just did apt-get remove postfix.  That worked in
the same way that decapitation cures a headache.

Now that I *believe* I've cleaned up the malicious code and I'd
like to re-install and turn on postfix again.  Before I do, is
there a way to either throttle the email output (our expected
output is a couple of emails a day from the contact form) OR fire
off an alarm if there are more than <arbitrary low number> emails
being sent in a single hour?  Perhaps there is yet another
alternative that I've not thought of?  (So far, I've thought of:
not re-installing Postfix, replacing the web site code, and moving
to Tibet.)  I don't have authorization to replace this code yet
and my wife won't move to Tibet so that's out too... for now.

Eric
- --
#  Eric Lucas
#
#                "Oh, I have slipped the surly bond of earth
#                 And danced the skies on laughter-silvered wings...
#                                        -- John Gillespie Magee Jr
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1.4.10 (GNU/Linux)
Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org/

iEYEARECAAYFAk9GzaMACgkQ2sGpvXQrZ/4jfQCeM5AbcAGoRObvPD7skRdMMA1+
ABAAnRP+aYzGoHEzvlQRQgA0lxmtAhB0
=8Pcn
-----END PGP SIGNATURE-----
___________________________________________________________________________
Philadelphia Linux Users Group         --        http://www.phillylinux.org
Announcements - http://lists.phillylinux.org/mailman/listinfo/plug-announce
General Discussion  --   http://lists.phillylinux.org/mailman/listinfo/plug
___________________________________________________________________________
Philadelphia Linux Users Group         --        http://www.phillylinux.org
Announcements - http://lists.phillylinux.org/mailman/listinfo/plug-announce
General Discussion  --   http://lists.phillylinux.org/mailman/listinfo/plug