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Re: Rule to detect search engines
From: Borja Luaces <borja.luaces () gmail com>
Date: Tue, 2 Jul 2013 08:50:00 +0200

Thanks for your time.

Will try with the flowbit.


On Mon, Jul 1, 2013 at 4:32 PM, waldo kitty <wkitty42 () windstream net> wrote:

On 7/1/2013 07:20, Borja Luaces wrote:
Hello all,

I am updating some rules to detect phishing sites against our customer
and I was
wondering if someone has created a rule set to "disable" search engine
impacts.

I was firstly thinking about adding to each rule some pcre, one for each
mayor
search engine (google, bing, yahoo,...) but I think this is nonsense.

actually, in your case, that is the way to go...

As second option I though about creating a white list but I have no
access to
create it, I am only allowed to create rules.

Any other idea?

in your phishing rules, set a flowbit... then in your rules to detect if
it is a
search engine, unset that flowbit... at the end, one rule to check the
flowbit... if it is still set, then fire the phishing alert otherwise it
is a
search engine and the phishing alert is not fired...

--
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-- 
Borja Luaces Altares
Junior malware analyst (MCSE Security,C|EH & CSSA)
Information Systems Security Officer
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