Re: Different formats in rules files

[Joel Esler <jesler () sourcefire com>]

Those are decoder/preprocessor rules.  Snort does not ship with a default
ruleset, you can find Snort's rulesets at www.snort.org/snort-rules




On Wed, Jul 17, 2013 at 2:54 PM, mulhern <mulhern () gmail com> wrote:

> From decoder.rules (first line):
>
> alert ( msg:"DECODE_NOT_IPV4_DGRAM"; sid:1; gid:116; rev:1;
> metadata:rule-ty    pe decode; classtype:protocol-command-decode;)
>
> From sensitive-data.rules (first line):
>
> alert tcp $HOME_NET any -> $EXTERNAL_NET [80,20,25,143,110]
> (msg:"SENSITIVE-    DATA U.S. Phone Numbers"; metadata:service http,
> service smtp, service ftp-d    ata, service imap, service pop3;
> sd_pattern:20,(\d{3}) ?\d{3}-\d{4}; classty    pe:sdf; sid:6; gid:138;
> rev:1;)
>
> Both are in current Snort distribution: 2.9.4.6.
>
> - mulhern
>
>
> On Wed, Jul 17, 2013 at 12:27 PM, Joel Esler <jesler () sourcefire com>wrote:
>
> > Please post the full rules.
> >
> >
> > On Wed, Jul 17, 2013 at 12:22 PM, mulhern <mulhern () gmail com> wrote:
> >
> > > Hi!
> > >
> > > The current Snort distribution includes only three .rules files, but two
> > > of them have a strange format that I don't see in the manual, as:
> > >
> > > alert { msg:                            ...and so forth
> > >
> > > as opposed to:
> > >
> > > alert tcp any any ->                ...and so forth
> > >
> > > What's going on there?
> > >
> > > Thanks!
> > >
> > > - mulhern
> > >
> > >
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> >
> >
> > --
> > Joel Esler
> > Senior Research Engineer, VRT
> > OpenSource Community Manager
> > Sourcefire


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

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