[Bro] Duqu script

[Zied Turki]

Hello,

Thank you for your help, I prefer your version. 


Many thanks,

BR,
Zied

Subject: Re: [Bro] Duqu script
From: daniel.guerra69 at gmail.com
Date: Sat, 28 Nov 2015 23:14:30 +0100
CC: zied.turki at outlook.com; bro at bro.org
To: jan.grashofer at cern.ch

Or you could use this
from line 77if ( c$id$orig_h in duqus && c$http?$resp_mime_types ){            local mime_num:count;            for (mime_num in c$http$resp_mime_types) {              if ( duqus[c$id$orig_h] == JPEG_REQUEST &&                 c$http$status_code == 200 &&                 /image\/jpeg/ in c$http$resp_mime_types[mime_num] )                {                duqus[c$id$orig_h] = JPEG_REPLY;                NOTICE([$note=Potential_Duqu_Infection,                        $msg=fmt("Initial Duqu JPEG exchange"),                        $conn=c]);                }              else                  delete duqus[c$id$orig_h]; # Purge unnecessary state early.             }}On 27 Nov 2015, at 13:10, Jan Grashofer <jan.grashofer at cern.ch> wrote:Hi Zied, while mime_types was a string, resp_mime_types is a vector of strings. If I am not mistaken it contains all matching mime types ordered by probability. Unfortunately I am not able to find proof for this in the documentation. However, to fix your issue you could loop through the vector or just use the first element resp_mime_types[0]. Best regards,Jan From: bro-bounces at bro.org [bro-bounces at bro.org] on behalf of Zied Turki [zied.turki at outlook.com]
Sent: Friday, November 27, 2015 11:54
To: bro at bro.org
Subject: [Bro] Duqu script

Dear all,

I tried to test the bro script to log the Duqu attack published through Github.  The broctl check failed and here below the output :

"error in /usr/local/bro/share/bro/policy/bro-scripts/duqu.bro, line 81: no such field in record (HTTP::c$http$mime_types)"

I've understood that $mime_type has changed in the new bro version and I've tried to change it in the script with "resp_mime_types" . Here below the new output :

error in /usr/local/bro/share/bro/base/protocols/http/./entities.bro, line 27 and /usr/local/bro/share/bro/policy/bro-scripts/duqu.bro, line 81: pattern requires string index (vector of string and /^?(image\/jpeg)$?/)

I am new to bro scripts. Please, I need your help to understand how to manage this kind of errors. Anyone could help please ? 

Please find below the link to the original script :
https://github.com/mavam/brospects/blob/master/bro/duqu.bro


Many thanks,

BR,
Zied 






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