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Help in analyzing a junk email solicited

Posted on 2011-04-24
Medium Priority
Last Modified: 2012-06-27
Hello everybody and Happy Easter.

I need to ask for help. A customer of mine (and many people he knows as well as myself) are getting spam, the "typical" junk with just a link in the email. Always his email address is shown as the sender address.

I have tested his machine (XP SP3); MS Security Essentials, MalwareBytes and SuperAntiSpyware say the machine is clean. My machine (W7 SP1) is clean by the same tests as well and naturally we have never clicked on any of the links. We both use the Mozilla Thunderbird email client version 3.1.9.

I am not a networking guy beyond the basics and can not decipher what IP address (and email account?) the mails are originating from.

So I add the source of the mail in text format following this post hoping for help.

Thank you in advance. Eike
From - Sun Apr 24 17:33:24 2011
X-Account-Key: account1
X-Mozilla-Status: 0011
X-Mozilla-Status2: 00000000
X-Apparently-To: ejheinze@att.net via; Sun, 24 Apr 2011 15:27:07 -0700
Received-SPF: none (mta1010.sbc.mail.sp1.yahoo.com: domain of larry.koltz@yahoo.com does not designate permitted sender hosts)
X-YMailISG: RdRa0BYcZAqbZj3HW9bLq4Km65VL2O9BWxaNuJ_lIzOODqo2
X-Originating-IP: []
Authentication-Results: mta1010.sbc.mail.sp1.yahoo.com  from=yahoo.com; domainkeys=pass (ok);  from=yahoo.com; dkim=pass (ok)
Received: from  (EHLO sccwmxc04.att.net) (
  by mta1010.sbc.mail.sp1.yahoo.com with SMTP; Sun, 24 Apr 2011 15:27:07 -0700
Received: from web36804.mail.mud.yahoo.com ([])
          by att.net (sccwmxc04) with SMTP
          id <20110424222706s0400io4a9e>; Sun, 24 Apr 2011 22:27:06 +0000
X-Originating-IP: []
Received: (qmail 56903 invoked by uid 60001); 24 Apr 2011 22:27:06 -0000
DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=yahoo.com; s=s1024; t=1303684026; bh=kttlTHIdys+9glH7u/CJvEoeaz4sdgMOQ7JdchLHNn4=; h=Message-ID:X-YMail-OSG:Received:X-Mailer:Date:From:Subject:To:MIME-Version:Content-Type; b=5qrRbIa6DnuzEtGxESfeMoJDArJjmXPIj9sH1OoI4cxySd4CnsfBLOLnFzzRU2Qzn045rysa4tvGGH2VSL7Hc1wMkJ4x5GHtRA+TQLwO8KjFfSl/OZrfTEQi/ZXePRSt+6mnhsKywciaQ5gZLCCd15h3zTxt8rXoPYKDbtBtS5E=
DomainKey-Signature:a=rsa-sha1; q=dns; c=nofws;
  s=s1024; d=yahoo.com;
Message-ID: <313269.28423.qm@web36804.mail.mud.yahoo.com>
X-YMail-OSG: L5nbghUVM1kiRBeQmswrxy5WDB66KCSXSzrsBLZvYwsNePr
Received: from [] by web36804.mail.mud.yahoo.com via HTTP; Sun, 24 Apr 2011 15:27:06 PDT
X-Mailer: YahooMailWebService/
Date: Sun, 24 Apr 2011 15:27:06 -0700 (PDT)
From: Larry Koltz <larry.koltz@yahoo.com>
Subject: Re:4
To: dean@outdoornews.com, dirtybob47@gmail.com, editor@lakelandtimes.com,
  ejheinze@att.net, erica.lake@imail.org, jjflickenger@hotmail.com,
MIME-Version: 1.0
Content-Type: text/plain; charset=us-ascii

http://lamaisonenchantee.fr/cool01.11.php?SID=326       --- Do NOT click this link!

Question by:eikelein
LVL 99

Expert Comment

by:John Hurst
ID: 35457441
It is an exceedingly common spam trick to forge the from so as to be from the sender. I see this all the time in my spam quarantine.

So long as your mail server is not a open relay, and so long as your email clients have not been compromised with malware, then really all you can do is check your spam filtering rules and try to exclude spam based on its characteristics (more of an art than a science). ... Thinkpads_User

Author Comment

ID: 35457476
Thank you thinkpads_user.
I am sorry but I knew all this; I am just trying to help a customer to maybe stop what he perceives almost as a personal assault.
But again, thanks.
LVL 99

Assisted Solution

by:John Hurst
John Hurst earned 400 total points
ID: 35457480
By the way, you can use Smart Whois or like tool to trace IP addresses. is Yahoo! is a more likely candidate. It is registered to Kuentos Communications, Inc. in Guam.

.. Thinkpads_User
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LVL 99

Expert Comment

by:John Hurst
ID: 35457490
My email is by now very well filtered and I see very little spam. Accordingly, I do not trace much spam any more. However, a decent approach (and one you can use here I think) is to look at the IP farthest down. In many cases, this is where the spam is coming from. ... Thinkpads_User
LVL 84

Assisted Solution

by:Dave Baldwin
Dave Baldwin earned 600 total points
ID: 35457543
It looks to me like someone has guessed his Yahoo password and now has access to his account and they are sending spam out as though it were him.  Has his password been changed yet?

Author Comment

ID: 35457555
@thinkpads_user: Thanks for the comment with the translated IP addresses; that certainly may become helpful. And the tip with the IP furthest down, THAT is the kind of tips I was hoping for.

@DaveBaldwin: THANK YOU Dave.  I am biting my hinders that I didn't think of that... You are a contender for at least some of the points.
LVL 65

Accepted Solution

btan earned 1000 total points
ID: 35481354
typically the source for the email comes from the "Received: from" and in this case it is which is another ISP ( Kuentos Communication in Guam.


Doesn't look so likely that your customer may have any dealing in that area (i supposed). Having said that, spam would forged "Received:" lines, intended to throw you off the trail. But the last one is normally the source.

Some sharing
- The "X-Apparently-To:" header line was added by 'mta1010.sbc.mail.sp1.yahoo.com' to identify the SMTP "RCPT TO:" email address.
- The "X-YahooFilteredBulk:" header line was added by Yahoo! SpamGuard to tag this email as matching specific tests for spam.
- The "X-Originating-IP:" immediately below was added by 'mta1010.sbc.mail.sp1.yahoo.com' to identify the source IP address.

But to make it simple, just paste the header chunk into this link and it will tell you more in organised fashion
@ http://www.iptrackeronline.com/header.php

Author Closing Comment

ID: 35481859
Wow breadtan! Thank you! That was the kind of info I was looking for.

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