[Bro] A little more confusion with Intel

[Michael Shirk]

Maybe tab formatting in the intel.dat file?

I think you will get Reporter errors, so the first IOC works, but the
second one does not because it cannot be parsed.

--
Michael Shirk
Daemon Security, Inc.
https://www.daemon-security.com

On Jan 18, 2018 12:24, "James Lay" <jlay at slave-tothe-box.net> wrote:

> In this particular test I haven't set it for either run.  Thanks Michael.
>
> James
>
> On 2018-01-18 10:16, Michael Shirk wrote:
>
> What do you have your local_nets set to?
>
> --
> Michael Shirk
> Daemon Security, Inc.
> https://www.daemon-security.com
>
> On Jan 18, 2018 11:55, "James Lay" <jlay at slave-tothe-box.net> wrote:
>
>> So I'm testing something completely unrelated to this issue, but I've run
>> into something interesting.  First off following this works:
>>
>> https://www.bro.org/current/solutions/intel/index.html
>>
>> my test intel-1.bro:
>> @load frameworks/intel/seen
>>
>> redef Intel::read_files += {
>> fmt("%s/intel-1.dat", @DIR)
>> };
>>
>> my intel-1.dat file (whitespace=tab):
>> #fields indicator indicator_type meta.source
>> fetchback.com Intel::DOMAIN my_special_source
>> yahoo.com Intel::DOMAIN testdomain
>>
>> I've carved out the dns request for fetchback.com from the exercise
>> packet capture, which I'm including.  Testing line below works just fine:
>>
>> bro -C -r exercise-traffic-fetch-dns.pcap intel-1.bro
>>
>> I see lot's of good stuff:
>> conn.log
>> 1258565309.806483 CmeOAzpOmlw26nOEi 192.168.1.103 53856 192.168.1.1 53
>> udp dns 0.200354 31 99 SF - - 0 Dd 1 59 1 127 (empty)
>>
>> dns.log
>> 1258565309.806483       CVifWt1zc5YSG0Vhc9      192.168.1.103   53856
>>  192.168.1.1     53      udp     4438    0.200354        fetchback.com
>>  1       C_INTERNET      1       A       0       NOERROR F       F      TT
>>      0       69.71.52.52     1800.000000 F
>>
>> intel.log
>> 1258565309.806483 CmeOAzpOmlw26nOEi 192.168.1.103 53856 192.168.1.1 53
>> fetchback.com Intel::DOMAIN DNS::IN_REQUEST bro Intel::DOMAIN
>> my_special_source - - -
>>
>>
>> however running against the included yahoodns.pcap here's what I get:
>> conn.log
>> 1516289219.143906 CFXRMB4RJIFYSdw72a 192.168.1.2 62196 192.168.1.1 53 udp
>> dns 0.003246 31 124 SF - - 0 Dd 1 59 1 152 (empty)
>>
>> dns.log
>> 1516289219.143906 CFXRMB4RJIFYSdw72a 192.168.1.2 62196 192.168.1.1 53 udp
>> 3285 0.003246 www.yahoo.com 1 C_INTERNET 1 A 0 NOERROR F F TT 0
>> atsv2-fp.wg1.b.yahoo.com,98.138.252.38,98.138.252.39,98.139.180.180,206.190.39.43
>> 1320.000000,39.000000,39.000000,39.000000,39.000000 F
>>
>> and no intel.log.  What's different here?  Would love to know what I'm
>> missing..thank you.
>>
>> James
>>
>> _______________________________________________
>> Bro mailing list
>> bro at bro-ids.org
>> http://mailman.ICSI.Berkeley.EDU/mailman/listinfo/bro
>
>
>
>
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