New SPAM DOS

Owen DeLong owen at delong.com
Fri Jan 8 14:52:17 CST 2010


Unfortunately, I only have the spamcop report sent to me, I don't have the original message.
What spamcop sends does not include Content-Type headers or the additional parts of
the message, only the plain text portion.

Unfortunately, it's turnning things like SPAMCOP into a DOS attack against the sites
they are hoping to protect when they start treating the initial "advertised" URL as
being the "spam advertised site".

Owen

On Jan 8, 2010, at 11:39 AM, sthaug at nethelp.no wrote:

>> I host scvrs.org on one of my servers, and, it does not have any outlook or owa
>> services.  For some reason, someone decided to try and send this message
>> out to various internet recipients:
> ...
>> Anyone seen this before?  Any good techniques for combatting it?
> 
> If you look more closely at the messages I believe you'll find that
> they are multipart/alternative, and that the second part gives a
> slightly modified version of the owa URL. For instance, for my own
> nethelp.no domain the first part of message says
> 
> http://nethelp.no/owa/...
> 
> but the second part specifies URLs like
> 
> http://nethelp.no.ujjikx.co.im/owa/...
> http://nethelp.no.ujjiks.net.im/owa/...
> http://nethelp.no.ikuu8w.com/owa/...
> http://nethelp.no.ikuu8e.net/owa/...
> 
> This is a very old trick, seen lots of times in connection with
> phishing sites, for instance.
> 
> Steinar Haug, Nethelp consulting, sthaug at nethelp.no





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