/usr/local/share/snort/web-client.rules:alert tcp $HOME_NET any ->
$EXTERNAL_NET $HTTP_PORTS (msg:"WEB-CLIENT Microsoft emf metafile access";
flow:from_client,established; uricontent:".emf"; reference:bugtraq,10120;
reference:bugtraq,9707; reference:cve,2003-0906; classtype:attempted-user;
sid:2435; rev:4;)
Payload:
length = 326
000 : 47 45 54 20 2F 69 2E 70 2E 65 6D 66 65 6D 61 6C GET /i.p.emfemal
010 : 65 2E 67 69 66 20 48 54 54 50 2F 31 2E 31 0D 0A e.gif HTTP/1.1..
020 : 41 63 63 65 70 74 3A 20 2A 2F 2A 0D 0A 52 65 66 Accept: */*..Ref
030 : 65 72 65 72 3A 20 68 74 74 70 3A 2F 2F 62 79 31 erer: http://by1
040 : 30 31 66 64 2E 62 61 79 31 30 31 2E 68 6F 74 6D 01fd.bay101.hotm
050 : 61 69 6C 2E 6D 73 6E 2E 63 6F 6D 2F 63 67 69 2D ail.msn.com/cgi-
060 : 62 69 6E 2F 64 61 73 70 2F 45 4E 2F 72 74 65 5F bin/dasp/EN/rte_
070 : 5F 5F 31 30 30 30 30 30 30 33 2E 61 73 70 0D 0A __10000003.asp..
080 : 41 63 63 65 70 74 2D 4C 61 6E 67 75 61 67 65 3A Accept-Language:
090 : 20 65 6E 2D 75 73 0D 0A 41 63 63 65 70 74 2D 45 en-us..Accept-E
0a0 : 6E 63 6F 64 69 6E 67 3A 20 67 7A 69 70 2C 20 64 ncoding: gzip, d
0b0 : 65 66 6C 61 74 65 0D 0A 55 73 65 72 2D 41 67 65 eflate..User-Age
0c0 : 6E 74 3A 20 4D 6F 7A 69 6C 6C 61 2F 34 2E 30 20 nt: Mozilla/4.0
0d0 : 28 63 6F 6D 70 61 74 69 62 6C 65 3B 20 4D 53 49 (compatible; MSI
0e0 : 45 20 36 2E 30 3B 20 57 69 6E 64 6F 77 73 20 4E E 6.0; Windows N
0f0 : 54 20 35 2E 31 3B 20 53 56 31 3B 20 2E 4E 45 54 T 5.1; SV1; .NET
100 : 20 43 4C 52 20 31 2E 31 2E 34 33 32 32 29 0D 0A CLR 1.1.4322)..
110 : 48 6F 73 74 3A 20 67 72 61 70 68 69 63 73 2E 68 Host: graphics.h
120 : 6F 74 6D 61 69 6C 2E 63 6F 6D 0D 0A 43 6F 6E 6E otmail.com..Conn
130 : 65 63 74 69 6F 6E 3A 20 4B 65 65 70 2D 41 6C 69 ection: Keep-Ali
140 : 76 65 0D 0A 0D 0A ve....
Maybe content:".emf%20";?
Paul Schmehl (pauls@utdallas.edu)
Adjunct Information Security Officer
The University of Texas at Dallas
AVIEN Founding Member
http://www.utdallas.edu
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