[Snort-users] PulledPork / Modifysid.conf Issues

Turnbough, Bradley E. bturnbough at ...15650...
Thu Sep 19 11:29:55 EDT 2013


Gents,

Snort ---2.9.3.1
Pulled Pork ---0.6.1
Barnyard2 ---2.1.9
Sonrby ---2.5.3

Rule BEFORE Pulled Pork modifysid processing:
------------------------------------------------------------
alert udp $HOME_NET any -> $HOME_NET 53 (msg:"INDICATOR-COMPROMISE Suspicious .cn dns query"; flow:to_server; content:"|01 00 00 01 00 00 00 00 00 00|"; depth:10; offset:2; content:"|02|cn|00|"; distance:0; pcre:"/[\x05-\x20][bcdfghjklmnpqrstvwxyz]{5,32}[^\x00]*?\x02cn\x00/i"; metadata:policy security-ips drop, service dns; classtype:trojan-activity; sid:15167; rev:11;)

Rule after Pulled Pork modifysid processing:
------------------------------------------------------------
alert udp $HOME_NET any -> $HOME_NET 53 (msg:"INDICATOR-COMPROMISE Suspicious .cn dns query"; flow:to_server; content:"|01 00 00 01 00 00 00 00 00 00|"; depth:10; offset:2; content:"|02|cn|00|"; distance:0; pcre:"/[\x05-\x20][bcdfghjklmnpqrstvwxyz]{5,32}[^\x00]*?\x02cn\x00/i"; metadata:policy security-ips drop, service dns; classtype:misc-activity; sid:15167; rev:11;)

Modifysid.conf:
------------------------------------------------------------
15167 "classtype:trojan-activity" "classtype:misc-activity";
19020 "classtype:trojan-activity" "classtype:misc-activity";
15168 "classtype:trojan-activity" "classtype:misc-activity";

Classification.conf:
------------------------------------------------------------
config classification: misc-activity,Misc activity,3


What I'm trying to achieve:
------------------------------------------------------------
I want to reclassify the rule from a HIGH priority (1) to a LOW priority (3).  It appears that pulled pork is doing its job, as I see the classification change in the rules file, but the event isn't being inserted by barnyard2 into the snorby database with a LOW priority as per the rule classification.  This is the very first time I've done this so I'm a bit confused as to why this is occurring.

I've restarted both snort and also barnyard2, but no change in outcome.


Ideas?

Thanks,

Brad
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