Re: [Snort-sigs] [Emerging-Sigs] TROJ_NAIKON.A sig

[James Lay <jlay () slave-tothe-box net>]

On 2013-04-26 13:48, Will Metcalf wrote:
> This wont work on snort unless 443 is configured as an http port in
> your http_inspect config, which it generally is not. No biggie though
> we can drop http_header for snort....
>
> Regards,
>
> Will
>
> On Fri, Apr 26, 2013 at 2:35 PM, James Lay <jlay () slave-tothe-box net
> [5]> wrote:
>
> > And another (slow day)
> >
> > alert tcp $HOME_NET any -> $EXTERNAL_NET 443
> > (msg:"INDICATOR-COMPROMISED TROJ_NAIKON.A User-Agent";
> > flow:to_server,established; content:"User-Agent|3A|
> > NOKIAN95|2f|WEB"; http_header; fast_pattern:only; metadata:policy
> > balanced-ips drop, policy security-ips drop, service http;
>
> reference:url,http://blog.trendmicro.com/trendlabs-security-intelligence/targeted-attack-campaign-hides-behind-ssl-communication/
> > [1]; classtype:trojan-activity; sid:10000050; rev:1;)
> >
> > Im thinking file_data isnt needed as were just looking at headers?
> >
> > James

Ah that TOTALLY makes sense...I missed that...meh..it's Friday :D

James

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