From: Don Parker (dparker@rigelksecurity.com)
Date: Thu Mar 11 2004 - 16:29:31 EST
You should be using all the openly available exploit code out there in addition to some
funky changes to them. You still need a baseline to work with, and the publicly available
stuff provides just that. Not only will this help you verify your IDS, it will also help
you to tweak the signatures as required for your environment. There are quite a few
factors beyond the normal stuff as well to test on.
One of the key areas as well is to make sure that your IDS is properly detecting
shellcode, and not smothering you with an avalanche of false positives. Properly
verifying your IDS or IPS for that matter is not an easy task, nor is it a quick one. If
you want to do it properly you need the requisite skills also. You don't want someone who
does not even understand the exploits he/she is running to test the signatures. There is
far more to this then simply throwing exploits at it.
Cheers!
Don
-------------------------------------------
Don Parker, GCIA
Intrusion Detection Specialist
Rigel Kent Security & Advisory Services Inc
www.rigelksecurity.com
ph :613.249.8340
fax:613.249.8319
--------------------------------------------
On Mar 11, Frederic Charpentier <fcharpentier@xmcopartners.com> wrote:
hi.
Some tools are ok to test an IDS, but this is not the best way to do that.
A tool will generate stupids triggers to wake up your IDS, like old CGIs
attacks et low-level tcp/ip tricks.
The best way is to be understand the patterns you set up in your IDS.
No matters that some stupid guys performs ping-attacks or silly cgis
attacks !!
* Try bufferoverflow/shellcodes patterns, and do simple test like :
copy/paste a shellcode into a telnet session.
* For http intrusion detection, detecting IIS nimda attacks is not
You must understand how an atacker will see you perimeter and then try
"Known yourself and yours vulnerabilities, then you can catch the one
An attacker will always try a lot of techniques and attacks before the
The purpose of an IDS is not to detect the maximum of worms attacks,
Frederic.
Security Tester wrote:
> Has anyone ever used a product called IDS Informer made by Blade
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efficient, try to trigger your IDS with XSS/SQL-Injection techniques is
much more efficient:
sample :
<a href='http://website/script?req=
href='http://website/script?req=''>http://website/script?req='</a> or 1=1
to figure out how they will test and try attacks. Then, it's easy to
setup IDS pattern and to test them with well-knonw exploit.
who want to attack your system."
real intrusion. This "noise" (like XSS, large port scans, SQL,
bufferoverflow/shellcode) is easy to detect.
stupid stuffs or the real attack which break into your systems.
The purpose of an IDS is to detect quickly the intruder when he tries or
when he is already in your systems. Then, you can quickly find him/her
and stop the attack before damages.
> Software? I am currently looking at different methods/products that can
> test the functionality and response of production IDS sensors.
>
> I have used stick and snot in the past, but these get old, and quite
> frankly they really don't test the detection capability of the sensor.
> They are however great tools for spamming the sensors and slipping in
> below the radar.
>
> Do any of you have any suggestions as to what might be a good
> technique/tool to test the responses of the IDS systems, apart from
> performing the attacks yourself. I am really looking for some sort of
> way to replay the attack data on the wire, but not actually target any
> machines.
>
> Any help would be greatly appreciated. Thanks in advance.
>
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Ethical Hacking at the InfoSec Institute. Mention this ad and get $545 off
any course! All of our class sizes are guaranteed to be 10 students or less
to facilitate one-on-one interaction with one of our expert instructors.
Attend a course taught by an expert instructor with years of in-the-field
pen testing experience in our state of the art hacking lab. Master the skills
of an Ethical Hacker to better assess the security of your organization.
Visit us at:
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