full-disclosure - Re: sshd logins without a source

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Message-ID: <4E7C4CE9.8030207@asp64.com>
Date: Fri, 23 Sep 2011 11:10:01 +0200
From: Guillaume Friloux <guillaume.friloux@...64.com>
To: full-disclosure@...ts.grok.org.uk
Subject: Re: sshd logins without a source

Hello,
http://packetstormsecurity.org/UNIX/penetration/log-wipers/indexdate.html


On 23/09/2011 05:45, BH wrote:
> Hi,
>
> I am taking a look at a few different servers that have been rooted at
> around the same time. At the time of the compromise I can see in each
> servers sshd logs an entry like the following:
>
> Sep 22 12:57:14 test-vm sshd[25002]: pam_unix(sshd:session): session
> opened for user root by (uid=0)
> Sep 22 12:57:32 test-vm sshd[25002]: pam_unix(sshd:session): session
> closed for user root
>
> Each of the servers has the same sort of entry in the log that match
> with the time that extra processes were being executed. Having a look at
> all other available logs (that were logged remotely) I can't see
> anything else that relates to the same event. To me it seems odd that
> there is no IP address corresponding with the login, I can't seem to
> reproduce that on my test servers. I also can't see the authentication
> method used as that isn't logged. Has anyone seen this before and know
> how this is done?
>
> Thanks
>
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_______________________________________________
Full-Disclosure - We believe in it.
Charter: http://lists.grok.org.uk/full-disclosure-charter.html
Hosted and sponsored by Secunia - http://secunia.com/