[Snort-sigs] Can Snort detect a download file from internet?

Tai Ly haotai1803 at gmail.com
Tue May 22 06:16:50 EDT 2018


 Thank you for your help.

I read this file and do some step as below:

- Add some line in the end of snort.conf

> # File Inspect Configuration
>
> preprocessor file_inspect: type_id, signature, \
>   capture_queue_size 5000, \
>   capture_disk /home/file_capture/tmp/
>
>
>

> # File magic reference
> include file_magic.conf


- and I try with 2 rules:

> 1. alert (msg: "JPEG file"; gid:146; sid:70;)
> 2. alert tcp any any -> any any (msg: "JPEG file"; file_type:JPEG;
> sid:1000001)


- I use this command to run snort:

> sudo snort -A console -q -u snort -g snort -c /etc/snort/snort.conf -i
> wlan0


But when I download JPEG file from internet , there is no alert.
Do I missing somethings?


On Tue, May 22, 2018 at 6:45 PM, Tai Ly <haotai1803 at gmail.com> wrote:

> Thank you for your help.
>
> I read this file and do some step as below:
>
> - Add some line in the end of snort.conf
>
>> # File Inspect Configuration
>>
>> preprocessor file_inspect: type_id, signature, \
>>   capture_queue_size 5000, \
>>   capture_disk /home/file_capture/tmp/
>>
>>
>>
>
>> # File magic reference
>> include file_magic.conf
>
>
> - and I try with 2 rules:
>
>> 1. alert (msg: "JPEG file"; gid:146; sid:70;)
>> 2. alert tcp any any -> any any (msg: "JPEG file"; file_type:JPEG;
>> sid:1000001)
>
>
> - I use this command to run snort:
>
>> sudo snort -A console -q -u snort -g snort -c /etc/snort/snort.conf -i
>> wlan0
>
>
> But when I download JPEG file from internet , there is no alert.
> Do I missing somethings?
>
> On Tue, May 22, 2018 at 9:51 AM, Al Lewis (allewi) <allewi at cisco.com>
> wrote:
>
>> Yes. See the README.file in the docs directory.
>>
>>
>>
>>
>>
>> *Albert Lewis*
>>
>> ENGINEER.SOFTWARE ENGINEERING
>>
>> Cisco Systems Inc.
>>
>> Email: allewi at cisco.com
>>
>>
>>
>> *From: *Snort-sigs <snort-sigs-bounces at lists.snort.org> on behalf of Hào
>> Tài via Snort-sigs <snort-sigs at lists.snort.org>
>> *Reply-To: *Hào Tài <haotai1803 at gmail.com>
>> *Date: *Monday, May 21, 2018 at 8:50 PM
>> *To: *"snort-sigs at lists.snort.org" <snort-sigs at lists.snort.org>
>> *Subject: *Re: [Snort-sigs] Can Snort detect a download file from
>> internet?
>>
>>
>>
>> Can everyone help me to confirm this point: " Can the Snort detect a
>> file from the internet" ?
>>
>> If yes , how do we config the Snort the get the content file?
>>
>>
>>
>>
>>
>> On Sun, May 20, 2018 at 3:23 PM, Hào Tài <haotai1803 at gmail.com> wrote:
>>
>> Hello everyone,
>>
>>
>>
>> I am a newbie about Snort. I try to write the snort rule to catch a
>> download JPG file from internet. Here is my rule:
>>
>>
>>
>> >> alert tcp any any <> $HOME_NET any (msg:"JPEG"; content:"|FF D8 FF
>> E0|"; sid:1000001)
>>
>>
>>
>> But it does not work. Do I missing somethings or do I need to config
>> somethings for Snort?
>>
>> Can everybody help me to find out the problem? Thank you.
>>
>>
>>
>> Regards,
>>
>> Tai Ly
>>
>>
>>
>
>
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