Re: Webshell SIGs

[Joel Esler <jesler () sourcefire com>]

Can you capture a pcap of the traffic and send it to me?  I can take a look.  Might be a lot easier than going back and 
forth a dozen times.

--
Joel Esler
Senior Research Engineer, VRT
OpenSource Community Manager
Sourcefire

On May 29, 2013, at 8:06 AM, Peter Bates <peter.bates () ucl ac uk> wrote:

> Signed PGP part
> Hello all (second try with spaces inserted)
>
> There are a variety of different SIGs to spot Webshells
> - - primarily PHP.
>
> One example is 22932 - "INDICATOR-COMPROMISE c99 shell.php command request - phpinfo"
>
> I've put up a copy of C99 and made requests towards it
> (primarily the rule above just hits on "act=php info")
> but get nothing - but I do get consistent hits on
> SID 1882 - id check returned userid.
>
> URL logging (on the same box as Snort) shows the traffic:
>
> 2013-05-29 11:19:47     1.2.3.4  5.6.7.8   >       GET     www.x.x   /99.php?act=php info    
> ELinks/0.12~pre5-2+squeeze1 (textmode; Debian; Linux 3.2.0-0.bpo.4-amd64 x86_64; 80x24-2)       http://www.x.x/99.php 
>    HTTP/1.1
>
> HOME_NET is correctly configured, EXTERNAL_NET is 'any'.
>
> Snort is 2.9.3.1 (yes I need to upgrade)
>
> Is there something obvious at fault?
> I'm wondering if there's a whole bunch of incoming web evil I'm missing.
>
> - -- 
> Peter Bates
> Senior Information Security Officer   Phone: +44(0)2076792049
> Information Services Division       Internal Ext: 32049
> University College London
> London WC1E 6BT
>
>
>
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