Snort mailing list archives

Re: Override alert msg for reputation preprocessor?


From: Duane Howard <duane.security () gmail com>
Date: Thu, 17 Jul 2014 14:31:27 -0700

Thanks Hui,

So I'm reading the answer as, "no, there's no way to override this value
without modifying the source and recompiling."

./d


On Thu, Jul 17, 2014 at 12:28 PM, Hui cao <huica () cisco com> wrote:

 Hi Duane,

This is done intentionally. If it's a preprocessor or decoder rule, the
message we want to use is the one that was in snort, not what is in the
message of the rule, which will be generic if the rule was not
autogenerated and potentially wrong if it was.

Best,
Hui.


On 07/17/2014 01:24 PM, Duane Howard wrote:

 Hey all, I've enabled alerting for blacklisted events using the
reputation preprocessor, but alerts continue to use the message defined in:
spp_reputation.h

 Instead of anything found in gen-msg.map or preproc.rules.

 Is there a way to override the message that's sent when writing fast or
unified2 alerts? We do some custom processing and I'd like to be able to
modify this a bit for our specific use case.

 examples:
spp_reputation.h:
#define REPUTATION_EVENT_BLACKLIST_STR     "(spp_reputation) packets
blacklisted"

 gen-msg.map:
136 || 1 || reputation: Packet is blacklisted

 preproc.rules:
alert ( msg: "REPUTATION_EVENT_BLACKLIST"; sid: 1; gid: 136; rev: 1;
metadata: rule-type preproc ; tag:session,60,seconds;
classtype:bad-unknown; )

 Actual alert resulting:
07/14-02:51:30.229493  [**] [136:1:1] (spp_reputation) packets blacklisted
[**] [Classification: Potentially Bad Traffic] [Priority: 2] {TCP}
XXX.XXX.XXX.XXX:XXXX -> XXX.XXX.XXX.XXX:XXX

 I'd like to change "(spp_reputation) packets blacklisted" without
needing to recompile, etc.

 Thanks,
Duane


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