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Network Security Snort-Signatures
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[Snort-sigs] Need sig to alert on webmail file attachments

Subject: [Snort-sigs] Need sig to alert on webmail file attachments
Date: Tue, 14 Sep 2004 00:05:57 -0500
Looking to make a sig to catch inbound webmail attachments from specific hosts, such as .EXE, .SCR, .BAT, .ZIP etc. coming from mail.yahoo.com.

I tried:

alert tcp any 216.109.127.60 -> $HOME_NET any (msg:"Inbound Yahoo Mail file attachment"; pcre:"/(.EXE|.SCR|.BAT|.DLL|.ZIP)/i"; classtype:Test; sid:20000_ _; rev:1;)

and I get some weird results, none of which are file attachments.

Thanks,

Jeff



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