Sober Issue

Hi there!
Well, I thought for my first post I would ask some of you more knowledgable folk for some assistance. :)

Anyway, the Sober worm is pounding our mail servers insanely. Luckily 99.9% of the mail is being stopped, which is awesome! The issue resides with that last 0.1%.

One of our users has [email protected] as an alias, for various reasons. For some reason, he continually gets rejected and bounced emails, all relating to the Sober.X worm. Observe:

Code:

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-----Original Message-----
From: Mail Error Handler [mailto:[email protected]]
Sent: Saturday, December 17, 2005 3:13 AM
To: info
Subject: Undeliverable Mail Returned to Sender

*** This message was automatically generated by the MailMax Error Responder ***

Sorry, your message from <[email protected]> to <[email protected]> could not be delivered. The specific error is:

  552 5.7.0 Illegal Attachment i38si6000307wxd


This is permanent error, and the message will not be retried any further.

=== The Original Message Follows ===

Received: from [151.199.126.160] by ibuyhouses.com [192.168.1.100] with SmartMax MailMax for [email protected]; Sat, 17 Dec 2005 04:12:19 -0500
Return-Path: <[email protected]>
X-SmartMax-AuthUser:
From: [email protected]
To: [email protected]
Date: Sat, 17 Dec 2005 08:53:18 GMT
Subject: Registration Confirmation
Importance: Normal
X-Priority: 3 (Normal)
Message-ID: <[email protected]>
MIME-Version: 1.0
Content-Type: multipart/mixed; boundary="=b80bafc1c.3a3348f3b"
Content-Transfer-Encoding: 7bit



--=b80bafc1c.3a3348f3b

Account and Password Information are attached!
--=b80bafc1c.3a3348f3b
Content-Type: application/octet-stream; name=reg_pass.zip
Content-Transfer-Encoding: base64
Content-Disposition: attachment; filename="reg_pass.zip"

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AAMAAAAEAAAA//8AALgAAAAAAAAAQAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA
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qYkAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAABQRQAATAEDAOVIXUMAAAAAAAAAAOAADwELAQYAANAA
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AAAAAAIAAAAAABAAABAAAAAAEAAAEAAAAAAAABAAAAAAAAAAAAAAAEAiAwCcAAAAACADAEACAAAA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=== End Original Message ===

*** This message was automatically generated by the MailMax Error Responder ***

---

Now, "reg_pass.zip" is a Sober payload, that much I know. But from what I have read about Sober, it will forge the senders address. This is all well and good, but the forged address (if I am reading this correctly) is one of our legitimate addresses! I had set up some rules on the users email client to automatically trash these messages, but it appears some are continually getting through. Apparently he got 30 of these just this morning. Anyway, I've done a full scan of every box on our network, and none of them are infected. I probably didn't need to do this, because if someone was infected, we'd be seeing tons of these messages on everyone's computer. ;)

So I guess my question is, what can I do to stop this? I have no idea how this worm somewhere got one of our legitimate email addresses; it seems to me that the ibuyhouses.com guy has the [email protected] address stored in their client, and that he is infected? Am I right in assuming this? What the heck can I do? :(

There is not one whit of anything you can do about your legitimate address being forged in messages sent from infected machines. The problem is akin to a person in Malaysia telling people he knows you personally and that you vouche for his product...assuming you DO live in the USA as your profile suggests, and you've never been to Malaysia, met this person, or had any interaction with him.

You simply have to influence or control over that part of this problem.

As for the incoming bounce replies...do you have a bridgehead type server, scanning all incoming messages? Are they getting by that server? If so, you need to look at the configuration and block/drop rules on that server. If not...well, all I can suggest is you look into one.

Or you could look into a service provider to do it for your. Postino is a big player in this field. So is VeriSign. I'm sure there are many companies that would be happy to receive your email, and filter it before it hits your network...for a fee.

Quote:

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I have no idea how this worm somewhere got one of our legitimate email addresses; it seems to me that the ibuyhouses.com guy has the [email protected] address stored in their client, and that he is infected? Am I right in assuming this?

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actually it's more likely that both address were stored on a computer that became infected. virusses tend not to use the addresses of computers they infect in order to keep them infected. they take stored email addys and use one in the sender field and send to the rest

See, I wouldn't think so. The headers look like someone that uses the ibuyhouses.com mail server attempted to send an email to that gmail account. Which to me says that both my user's address and the gmail address are stored on the aforementioned computer.

god what i would give to be sober... read my mood

sorry to say but something like this wont do it heh find somthing stronger ;)

Quote:

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sorry to say but something like this wont do it heh find somthing stronger

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I have no idea what you are talking about.

Quote:

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Originally posted here by hexadecimal
god what i would give to be sober... read my mood

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thats what i was talking about...it was a joke calm down son