Re: [Emerging-Sigs] Unusually small php puts

[Joel Esler <jesler () sourcefire com>]

James,

I ran this in our test systems for a couple weeks, and while it did alert, it didn't alert on anything that wasn't 
benign traffic.

--
Joel Esler
Senior Research Engineer, VRT
OpenSource Community Manager
Sourcefire

On May 16, 2013, at 2:37 PM, Joel Esler <jesler () sourcefire com> wrote:

> I'm going to test it in our test systems James, we'll see how it goes.
>
>
> On May 15, 2013, at 1:08 PM, James Lay <jlay () slave-tothe-box net> wrote:
>
> > Last month (the 19th I think) I attending an all day security conference...it was pretty good.  One of the tell tale 
> > signs of C2 traffic was small php PUT's (according to one presenter), so here's a sig for that:
> >
> > alert tcp $HOME_NET any -> $EXTERNAL_NET $HTTP_PORTS (msg:"POLICY Unusually small php PUT"; 
> > flow:to_server,established; content:"PUT"; http_method; http_uri; urilen:<10; classtype:misc-activity; sid:10000059; 
> > rev:1)
> >
> > Might be useful, might not.  I'm embarrassed that it took me almost a month to get to my notes 8-|
> >
> > James
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> >
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