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| Subject: | Re: [Snort-sigs] For Instance: Hostile FTP Sigs |
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| Date: | Mon, 31 Dec 2007 10:18:08 -0500 |
On Dec 31, 2007, at 2007/12/31 10:04 AM, Matt Jonkman wrote:
#by Matt Jonkman # Just stats codes, no welcome, etc. Very unique # something like: #220 #USER a #331 #PASS a #230 #TYPE I #200 #PORT 10,2,32,214,4,9 #200 #RETR msnnmaneger.exe #150 #226 #QUIT #221
alert tcp any 1024: -> $HOME_NET 1024: (msg:"BLEEDING-EDGE ATTACK_RESPONSE Off-Port FTP Without Banners - 220"; flow:established,to_server; dsize:6; content:"220 |0d 0a|"; offset:0; depth:6; flowbits:noalert; flowbits:set,ET.strippedftp220; sid: 2007714; rev:1;)
<strip a bunch of FTP state rules> Why write 9 extra rules when a tag on this 1 rule will accomplish the same thing and provide even more "useful" data. -brian ------------------------------------------------------------------------- This SF.net email is sponsored by: Microsoft Defy all challenges. Microsoft(R) Visual Studio 2005. http://clk.atdmt.com/MRT/go/vse0120000070mrt/direct/01/ _______________________________________________ Snort-sigs mailing list Snort-sigs@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/snort-sigs
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