Re: fun with posiden rootkit

[Alvin Oga <alvin.sec () Mail Linux-Consulting com>]

hi olaf

ifconfig could have just been replaced  with a text file 
tooo ... that when you reboot... the machine wont get online
since ifconfig is not there to setup the network ??

or more likely, as you say, they shot themself in the foot

other anti-virus sw running on linux
        http://www.Linux-Sec.net/Mail/#AntiVirus

c ya
alvin

- sometimes checking failed script-kiddies can be entertaining if time
  permits to look around for any funny stuff


On Mon, 25 Mar 2002, Olaf Schreck wrote:

> Hi,
>
> Today I cleaned up a freshly rooted (old and unmaintained) RedHat box.  
> Found a "posiden rootkit" with the usual stuff inside (modified ps, top, 
> find, netstat, ifconfig, syslogd, sshd; plus linsniffer, z2, wted, ..)
> Rootkit config files were named /dev/ptyp, /dev/ptyr etc.  Nothing fancy..
>
> Now the fun part: Imagine my surprise finding /sbin/ifconfig being a 
> text file that said:
>
> "This file was infected with a virus.
> The file was quarantined by Norton AntiVirus.
> Fri Oct 26 15:53:10 2001"
>
> Sure enough, this ifconfig "binary" was already included in the rootkit 
> tar file.  As we have never heard of Norton AntiVirus for Linux, we tend 
> to believe that poor kiddie downloaded the rootkit to his Windows box, 
> where his own Antivirus software shot himself in the foot.
>
> Stupid, eh?
>
>
> ciao,
> chakl
> -- 
> I don't know why more people don't use tcpdump to debug these sorts of
> situations...does it need to be called something else? ipdebug?
>                                       -- Darren Reed
>
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