inundator v0.5 Released – IDS/IPS/WAF Evasion & Flooding Tool


What is inundator?

inundator is a multi-threaded, queue-driven, IDS evasion tool. Its purpose is to anonymously flood intrusion detection systems (specifically Snort) with traffic designed to trigger false positives via a SOCKS proxy in order to obfuscate a real attack.

When would I use inundator?

inundator would be used whenever you feel there is a significant chance the attack you’re about to perform may be detected by the target’s intrusion detection system. You would launch inundator prior to starting the attack, and continue running it well after you have finished the attack. The hope is that if your attack is detected by the IDS, the alert will be buried among several thousand false positives, thus minimizing the chance of an IDS analyst detecting the real attack.

Tell me more

inundator is a modern twist on an old concept — it’s an IDS/IPS/WAF evasion tool, used to anonymously flood intrusion detection systems with false positives in order to obfuscate a real
attack. inundator leverages the vagueness and poor quality of Snort’s rules files to generate completely harmless packets / HTTP requests that contain just enough keywords to trigger a false positive. We thought this was an original idea, but it looks like Snot, fwsnort’s snortspoof, and possibly others beat us to the punch. However, these tools were developed around the turn of the century, are quite dated and well-forgotten, and overall quite inferior to inundator.

inundator is full featured, multi-threaded, queue-based, supports multiple targets, and requires the use of a SOCKS proxy for anonymization. Via Tor, inundator is capable of generating around 1000 false positives per minute. Via a high-bandwidth SOCKS proxy, you might be able to generate ten times that amount.

The general idea is one would launch inundator prior to starting an attack, allow it to run during the attack, and continue to run it a while longer after you’ve accomplished the attack. The goal, of course, is to generate an overwhelming number of false positives so that your real attack is essentially buried within the other alerts, minimizing the chance of your attack being detected. It
could also be used to ruin an IDS analyst’s day, or keep an organization’s infosec department busy for a while. I suppose it could also be used to test the effectiveness of an IDS, but no, not
really.

Requirements/Compatibility

inundator is implemented in Perl (version >= 5.10 is recommended due to ithreads bugs in previous versions), and has been tested on Debian Lenny, Debian Squeeze, Ubuntu Jaunty, BackTrack4, and Mac OS X against Snort v2.8.5.2. It is presumed to work on all POSIX operating systems. Hell, it might even work on Windows.

You can download inundator v0.5 here:

inundator_0.5.tar.gz

Or read more here.

Posted in: Hacking Tools, Networking Hacking


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