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| Subject: | Re: [Snort-sigs] rule content |
|---|---|
| Date: | Tue, 19 Jun 2007 12:20:57 +0100 |
On 19/06/07, Jules F. Pagna Disso <jferdinand@uacosendai.net> wrote:
1. When to convert byte? Raw data? Or when to leave it as it is or when to have a mixed binary and text content ?
I would go for the easiest to read. If it's all ascii, go for plain text. If you've got null bytes, backslashes or other stuff, might be easier to keep it all as hex.
For example I have the rules alert tcp any any -> any 80 (content: !"GET";) alert tcp any any -> any 139 (content: "¦5C 00¦P¦00¦P¦00¦E¦00 5cl`;)
I think this would be: 5c 00 50 00 50 00 45 00 5c (P being 0x50 and E being 0x45). Someone please correct me if I'm wrong :) I don't know NetBIOS well enough to say why this is a bad thing. cheers, Jamie -- Jamie Riden, CISSP / jamesr@europe.com / jamie@honeynet.org.uk UK Honeynet Project: http://www.ukhoneynet.org/ ------------------------------------------------------------------------- This SF.net email is sponsored by DB2 Express Download DB2 Express C - the FREE version of DB2 express and take control of your XML. No limits. Just data. Click to get it now. http://sourceforge.net/powerbar/db2/ _______________________________________________ Snort-sigs mailing list Snort-sigs@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/snort-sigs
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