Re: TOR Browser detection policy rule

[R S <rene.shuster () bcsemail org>]

Tor is on several 9000 range ports. 9001,9040 etc. but it's not using all
300 ports. There will be lots of traffic attributed to Tor although it
isn't. Very misleading and will cause trouble down the road with wrong
accusations. Will shed bad light on network admins.

Also suggest to change date to international ISO format YYYY-MM-DD.

Thanks. Best Regards.


On Tue, Dec 12, 2017 at 12:55 PM, Alberto Colosi via Snort-sigs <
snort-sigs () lists snort org> wrote:

> Hi , I understand TOR is a big problem, as me inside IBM as IBM NetWork
> and Security Admin and Architect
>
> Know that u can block TOR activities if trought a proy or direct with IP
> filtering.
>
>
> TOR list tor nodes to IN and OUT and MAIL and so on.
>
>
> You can firewall all TOR IN - IP Addresses as I done
>
>
> It is so quick and easy.
>
>
> Is not better to lock instead to detect and even complain with who used it?
>
>
>
>
>
>
> ------------------------------
> *From:* Snort-sigs <snort-sigs-bounces () lists snort org> on behalf of
> William Siradas <bill () lantrax com>
> *Sent:* Tuesday, December 12, 2017 6:46 PM
> *To:* snort-sigs () lists snort org
>
> *Subject:* Re: [Snort-sigs] TOR Browser detection policy rule
>
>
> unsubscribe
>
>
>
> *From:* Snort-sigs [mailto:snort-sigs-bounces () lists snort org] *On Behalf
> Of *Tyler Montier
> *Sent:* Monday, December 11, 2017 10:00 AM
> *To:* R S <rene.shuster () bcsemail org>
> *Cc:* snort-sigs <snort-sigs () lists snort org>; Lenny Hansson <
> lenny () netcowboy dk>
> *Subject:* Re: [Snort-sigs] TOR Browser detection policy rule
>
>
>
> Lenny,
>
>
>
> Thanks for your submission. We will review the rule for addition into the
> community ruleset, and get back to you when its finished.
>
>
>
> You said you tested the rule already, do you have any pcaps that you could
> send our way while we test the rule?
>
>
>
> Thanks,
>
>
>
> Tyler Montier
>
> Cisco Talos
>
>
>
> On Mon, Dec 11, 2017 at 9:34 AM, R S <rene.shuster () bcsemail org> wrote:
>
> 9000,9001,9040 etc. but not 300 ports. There will be lots of traffic
> attributed to Tor although it isn't.
>
> Suggest to change to date to international ISO format YYYY-MM-DD
>
>
>
> On Sun, Dec 10, 2017 at 6:17 PM, Lenny Hansson <lenny () netcowboy dk> wrote:
>
> To all SNORT users:
>
> TOR Browser detection rule. Feel free to use.
>
> I have tested the rule on 100GB data set no false positives so far. If
> you find any false positives please let me know.
>
> alert tcp $EXTERNAL_NET [9000:9300] -> $HOME_NET 1024: (msg:"NF - POLICY
> - TOR browser starting up - TOR SSL NAT Check Detected - Typical TOR DNS
> name"; flow:from_server,established;
> pcre:"/www\.[a-z0-9]{12,21}\.(com|net)/i";
> reference:url,networkforensic.dk; metadata:10122017;
> classtype:policy-violation; sid:5021501; rev:3;)
>
> It detects every time the TOR Browser is started.
>
> Best Regards
> Lenny Hansson
> ***********************************
> E-mail: security () netcowboy dk
> Key-ID: D282 E960 7B91 5A04 68DA AB33 4070 9EB8 9137 9877
> ***********************************
>
>
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>
> --
>
> Tech III * AppControl * Endpoint Protection * Server Maintenance
> Buncombe County Schools Technology Department Network Group
> ComicSans Awareness Campaign <http://comicsanscriminal.com>
>
>
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-- 
Tech III * AppControl * Endpoint Protection * Server Maintenance
Buncombe County Schools Technology Department Network Group
ComicSans Awareness Campaign <http://comicsanscriminal.com>

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href=" https://snort.org/downloads/#rule-downloads";>emerging threats</a>!