Re: Zombie detection rules

[Luke Ager <luke.ager () me com>]

I'll second this. It would be easier to use network devices as log sources such as Netflow and connection logs to 
determine patterns. 
Clearly good egress filtering is a priority and then base lining of permitted ports. 

If you have specific hosts in mind and the scope is small you could consider an endpoint agent also which includes 
network monitoring. LogRyhthms end point agent will support this. 

Failing that, arbour who are known for DDOS protection offer a product which uses snort but also integrates with their 
ddos threat intel. They have some techniques to detect zombies but it's based on their intelligence. 



Sent from my iPhone

> On 16 Feb 2017, at 09:00, Alberto Colosi <alcol () hotmail com> wrote:
>
> Hi another approach ............. are not firewalls ?
>
>
> I can't believe all is open , zombie is a wide kind of possible activity and is not so easy as can be imagined.
>
>
> firewalls and uncommon authorized port usage for example during the night but not only .............. . All other 
> kind of traffic will be dropped by firewalls and this kind of log is important too.
>
>
> a SIEM can perform this kind of check in automatic if not you'll have to create some scripts to inspect log files.
>
>
>
> Alberto Colosi
>
> IT Security & NetWork
>
>
>
>
>  
> From: Paul Li <paul () scybersecurity com>
> Sent: Thursday, February 16, 2017 5:32 AM
> To: snort-users () lists sourceforge net
> Subject: [Snort-users] Zombie detection rules
>  
> Is there any snort rule for zombies detection: to detect if the devices snort is monitoring are used as zombies. Or 
> some rules that can detect large outgress traffic from a monitored device would also work.
>
> Thanks,
> Paul
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