[Snort-sigs] Sype Excersise

waldo kitty wkitty42 at ...3507...
Thu May 16 20:33:11 EDT 2013


On 5/16/2013 18:27, James Lay wrote:
> So this is more of an exercise...:
>
> alert tcp $EXTERNAL_NET any ->  $HOME_NET $HTTP_PORTS (msg:"POLICY
> Leaked link via Skype pingback"; flow:to_server,established;
> content:"HEAD"; http_method; content:"User-Agent|3A| -"; http_header;
> content:"Referer|3A| -"; http_header;
> reference:url,http://seclists.org/fulldisclosure/2013/May/78;
> classtype:bad-unknown; sid:10000061; rev:1)
>
>   From the FD post:
> They have referrer and user agent set to a dash "-".
>
> Not that I'll actually run this, but just thoughts on if there would be
> a better way to write this up.  Thanks all.

a lot of anonymizing "services" use dashes for those two fields, too... 
"services" like norton's proxy filtering stuff and others of similar nature... 
at least, they used to... i don't see them in my http logs so much any more, 
though... not like i used to see them...

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