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Network Security Snort-Signatures
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Re: [Snort-sigs] rule to detect three strings?

Subject: Re: [Snort-sigs] rule to detect three strings?
Date: Thu, 05 May 2005 17:03:11 -0400
Rich Adamson wrote:

Can someone help me write a rule that would detect when three
strings occur within the same tcp packet/stream?

Strings: "John" "Doe" "12345"
in any order within the same tcp packet. (Since presumably this is a
data record, each string is expected to be in close proximity to the
others.)

Just use three content statements in the same snort rule, in the order
specified. You can use distance and within keywords to restrict where in
the packet it searches, relative to the last match.

http://www.snort.org/docs/snort_htmanuals/htmanual_233/node21.html#SECTION00457000000000000000



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