RE: Microsoft DCOM RPC Worm Alert

["David" <dwad24 () excite com>]

Hey Robert,

This is a wild stab in the dark, so someone correct me if I err...

my guess would be that the slashes "\" have characters after them. (which may be because of email formatting or 
something, so disregard if that's the case)  A slash in Unix land tells a shell that a command continues on to the next 
line, and in order for that to work, you cannot have anything after thos slashes except a carriage return.  I am 
guessing that snort rules may be modeled after that concept. :) (I hope)

try putting everything after slashes on  a new line.  e.g.  your rule below would look like this:

alert tcp $EXTERNAL_NET any -> $HOME_NET 135 \
(msg:"DCE RPC Interface Buffer Overflow Exploit"; \
content:"|00 5C 00 5C|"; \
content:!"|5C|"; within:32;\
flow:to_server,established; \
reference:bugtraq,8205; rev: 1;)


hope that works out!

Dave

> What did I do wrong with this rule? Snort refuses to run it.
>
> Error found at line 1543:
> alert tcp $EXTERNAL_NET any -> $HOME_NET 135 \ (msg:"DCE RPC >Interface
> Buffer Overflow Exploit"; \ content:"|00 5C 00 5C|"; \ >content:!"|5C|";
> within:32; \ flow:to_server,established; \ reference:bugtraq,8205; >rev: 1;) 

-----Original Message-----
From: IntegPatchMgr [mailto:IntegPatchMgr () infosys com] 
Sent: Tuesday, August 12, 2003 7:18 AM
To: snort-users () lists sourceforge net
Subject: [Snort-users] Microsoft DCOM RPC Worm Alert

Hi,

You can find snort sign for Microsoft DCOM RPC Worm at 

https://tms.symantec.com/members/AnalystReports/030811-Alert-DCOMworm.pd
f

Regards
Shivabasu



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