[dba-Tech] New trouble - zip virus?

Hi All,

Now I've got something suspicious like a virus attachment but my NAV doesn't
recognize it as a virus - here is its e-mail header:

>From service at smsconsulting.spb.ru  Sat Jun  4 01:20:42 2005
Received: from smsconsulting.spb.ru ([67.151.53.66])
  by batman.mns.ru with esmtp; Sat, 04 Jun 2005 01:20:39 +0400
  id 000149A4.42A0C9A7.000044CA
From: service at smsconsulting.spb.ru
To: shamil at smsconsulting.spb.ru
Subject: *WARNING* Your Email Account Will Be Closed
Date: Fri, 3 Jun 2005 14:17:50 -0700
MIME-Version: 1.0
Content-Type: multipart/mixed;
 boundary="----=_NextPart_000_0009_D44961E9.957809EC"
X-Priority: 3
X-MSMail-Priority: Normal
X-Spam-Status: Yes, hits=8.3 tagged_above=3.0 required=8.0 tests=BAYES_80,
 MISSING_MIMEOLE, NO_REAL_NAME, PRIORITY_NO_NAME, UPPERCASE_25_50
X-Spam-Level: ********
X-Spam-Flag: YES

WHOIS search didn't give any information on IP address: 67.151.53.66
I used this search Web site: http://www.ripe.net/whois

Could you please advise what's the best way to track the source of this
suspicious message?

Thank you,
Shamil