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

Russ rucombs at cisco.com
Mon May 21 21:30:55 EDT 2018


Snort 3 can detect files using the default conf.  It is easy to 
configure capture, etc. as well.

https://github.com/snort3/snort3.git

On 5/21/18 9:06 PM, Antonio Leding wrote:
> For easy reference: https://www.snort.org/faq/readme-file
>
>> On May 21, 2018, at 6:04 PM, Joel Esler (jesler) <jesler at cisco.com 
>> <mailto:jesler at cisco.com>> wrote:
>>
>> Snort can extract files from the network in real time and write them 
>> out to disk.  Please see the email that Al sent earlier about the 
>> README.file
>>
>> Sent from my iPad
>>
>> On May 21, 2018, at 9:01 PM, Antonio Leding <tech at leding.net 
>> <mailto:tech at leding.net>> wrote:
>>
>>> One point of clarification - I have Snort firing off an alert about 
>>> the file being downloaded and then the packet capture + Wireshark 
>>> for the follow-on file extraction and analysis.
>>>
>>>
>>>
>>>> On May 21, 2018, at 5:50 PM, Antonio Leding <tech at leding.net 
>>>> <mailto:tech at leding.net>> wrote:
>>>>
>>>> Not sure if this helps or is relevant but I have always done this 
>>>> using full packet capture + Wireshark.  If there is a way to do 
>>>> this directly in Snort, I would be curious to hear…
>>>>
>>>>
>>>>> On May 21, 2018, at 5:48 PM, Hào Tài via Snort-sigs 
>>>>> <snort-sigs at lists.snort.org <mailto:snort-sigs at lists.snort.org>> 
>>>>> wrote:
>>>>>
>>>>> 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 
>>>>> <mailto: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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>>>>
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>>>
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>>>
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>>> Snort ruleset, make sure to stay up to date to catch the most <a 
>>> href=" https://snort.org/downloads/#rule-downloads">emerging 
>>> threats</a>!
>
>
>
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>
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