Re: New Rootkit?

[Alvin Wong <alvin.wong () b2b com my>]

Yep,

It's the SucKIT alrite but another variant, i've been hit b4 and i
managed to find out using a command to look for setuid files and managed
to find where the directories where.
You should be able to toggle sk and get another shell that enables you
to find the password sniffer too. Look for telltale signs of ftping out
to another ip.
Probably someone produced a modified version of it, which is why
chkrootkit cannot detect it.

Regards,
Alvin

On Thu, 2003-10-16 at 23:45, Eoghan Casey wrote:
> This sounds like SucKIT (http://hysteria.sk/sd/f/suckit/) or a variant.  
> This has been in general use since last year. It injects itself  
> directly into kernel memory rather than using kernel loadable modules.
>
> See the README (http://hysteria.sk/sd/f/suckit/readme):
>
> Q: How I can make suckit to run automatically each reboot of machine ?
>    A: The generic way (as the install script does) is to
>       rename /sbin/init to /sbin/init<hidesuffix>, and place sk binary
>       instead of /sbin/init, so suckit will get resident imediatelly
>       after boot. However, when it will get resident, all of such changes
>       will be stealthed ;) If you can't fiddle with /sbin/init, you
>       still can place binary to somewhere into  
> /etc/rc.d/rc3.d/S##<hidesuffix>
>       or such.
>
> Eoghan Casey
>
> On Thursday, October 16, 2003, at 03:38  AM, Jonas Frey (Probe  
> Networks) wrote:
>
> > Hello,
> >
> > we've just had a customer machine blasing some 50mbit into our lines
> > with pretty high pps counts. After a short analysis we found out the
> > init  got replaced/backdoored and the original init was moved to
> > /sbin/telinit. However the filesize on both files was the same. This is
> > probably due to a lkm the rootkit uses to hide its existence.
> > Chkrootkit did NOT find this rootkit. However it pointed us the right
> > way saying the system had hidden processes running.
> > After replacing init with a good version and updating the kernel we
> > rebooted the box and found the hacked init as well as other programs of
> > the rootkit beeing located in /etc/.MG/ (this directory was hidden
> > before). Apparently this is a rootkit with a ddosnet touch.
> > I've put up the files for further analysis at:
> > http://81.2.144.1/rootkit/
> >
> >
> > --  
> > Mit freundlichen Grüßen / With kind regards,
> > Jonas Frey
> >
> >
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Learn how Solsoft can help you:
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- Make firewall, VPN, and NAT rules interoperable across heterogeneous
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