IDS mailing list archives
Re: Using Snort to find creditcard data?
From: Thrynn <thrynn404 () gmail com>
Date: Mon, 1 Oct 2007 10:48:36 -0400
To answer your question: yes, you could write a rule using a regular expression. However, I would suspect it would result in a high false positive rate due to the formatting (hyphens, space, etc). Also, a string of numbers does not make a credit card. So to do it right, you would have to write a plugin that takes the numbers and determines if they are a credit card or not. The luhn algorithm is very simple. On 26 Sep 2007 19:35:42 -0000, jerikl75 () gmail com <jerikl75 () gmail com> wrote:
Would it be possible to write a Snort rule that triggers on possible creditcard numbers and how would it look like? PCI standars says that all creditcard data should be encrypted, It woild be nice to verify that no card data shows up where it shouldn't... ------------------------------------------------------------------------ Test Your IDS Is your IDS deployed correctly? Find out quickly and easily by testing it with real-world attacks from CORE IMPACT. Go to http://www.coresecurity.com/index.php5?module=Form&action=impact&campaign=intro_sfw to learn more. ------------------------------------------------------------------------
------------------------------------------------------------------------ Test Your IDS Is your IDS deployed correctly? Find out quickly and easily by testing it with real-world attacks from CORE IMPACT. Go to http://www.coresecurity.com/index.php5?module=Form&action=impact&campaign=intro_sfw to learn more. ------------------------------------------------------------------------
Current thread:
- Re: Using Snort to find creditcard data? Mike Lococo (Oct 01)
- <Possible follow-ups>
- Re: Using Snort to find creditcard data? Stefano Zanero (Oct 01)
- Re: Using Snort to find creditcard data? Martin Roesch (Oct 02)
- Re: Using Snort to find creditcard data? Ron Gula (Oct 01)
- Re: Using Snort to find creditcard data? Jason (Oct 01)
- RE: Using Snort to find creditcard data? Srinivasa Addepalli (Oct 01)
- Re: Using Snort to find creditcard data? Thrynn (Oct 01)
- Re: Using Snort to find creditcard data? Jason Ross (Oct 01)
- RE: Using Snort to find creditcard data? Ofer Shezaf (Oct 02)
- RE: Using Snort to find creditcard data? Craig Chamberlain (Oct 16)
- Re: Using Snort to find creditcard data? Siim Põder (Oct 18)
- Message not available
- Re: Using Snort to find creditcard data? Siim Põder (Oct 19)
- RE: Using Snort to find creditcard data? Craig Chamberlain (Oct 19)
- RE: Using Snort to find creditcard data? Craig Chamberlain (Oct 16)