Re: need help with openssh attack
md5sum`s of sshd files seems to be same comparing to non infected
system. I do not have any /etc/xinet.d .sshd_config are defaults
ones.I will try to run find / -mtime -5 but i guess nothing
interesting will come.
Any another ideas? I still can provide ssh access.
On Thu, Dec 29, 2011 at 8:42 PM, Todd Wheeler <todd@wedu.com> wrote:
> I'm wondering based on this if there is anything in /etc/xinetd.d or if
> there is anything in /etc/ssh/sshd_config that would point you in the right
> direction. Sounds like something is spawning based on a connection to port
> 22. (if OpenSSH itself wasn't exploited)
>
> Times like this: I've found that it helps to use the 'find' command and
> print a list of files modified within the last 'x' days. ('find / -mtime -5'
> will show last 5 days, obviously change the '5' for shorter windows) That
> may indicate anything that has been replaced system-wise and also point you
> in the right direction. I also find that if a system has been exploited,
> most automated scripts will chattr the files to make them slightly more
> difficult for someone that doesn't understand that - there may be a way to
> search for these directly, but I can't remember off hand. It's just another
> signature of automated rootkits, though.
>
> Good luck!
>
> On Dec 29, 2011, at 11:32 AM, Taz wrote:
>
> Some of them yes, some of them no. Almost every server has the only
> nginx installed without PHP or Perl backend with the simple location /
> that just serves static files.perl script was launched from ssh. I am
> sure. How could you describe then such environ file of the perl PID?
> Where it is clearly mentioned that command was launched throgh ssh on
> SSH port from a concrete IP that does not belong to me . -j DROP rule
> on 22 port prevented that script to appear again but i`s not a
> solution.
>
>
>
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