Re: wildcards in rules?

[Matt Kettler <mkettler () evi-inc com>]

At 02:07 PM 5/26/2004, Sheahan, Paul wrote:
> I'm looking to use Snort to find a string of numbers that begin with a 
> known group of numbers, but end with unknown numbers.
>
> Example:
>
> I want Snort to alert if it sees a number like 8976**** in a packet where 
> **** can be any numbers. Can this be done with Snort? I couldn't find much 
> on wildcards but did read in a few places that Snort has limited wildcard 
> support.

Using pcre, yes.

The regex would look like:
        8976\d{4}

\d means "any numeric digit" and {4} means "repeat 4 times" in regex notation. 



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