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Threat Advisory: McAfee AVERT Raises Risk Assessment to Medium on New W32/ Virus

  • 17 February, 2005 14:21

<p>McAfee AVERT Raises Risk Assessment Based on Prevalence</p>
<p>SYDNEY, Feb. 17 -- McAfee, Inc., the pioneer and worldwide leader of intrusion prevention solutions, today announced that McAfee AVERT (Anti-virus and Vulnerability Emergency Response Team), the world-class research division of McAfee, Inc., raised the risk assessment to Medium on the recently discovered W32/ worm, also known as The attachment, which downloads the BackDoor-CEB.f Trojan, contains a peer to peer propagation routine and may be an EXE file. To date, McAfee AVERT has received more than 50 reports of the virus being stopped or infecting users from the field. Most of these reports have arrived from the United States, though AVERT has also received reports from Australia and the United Kingdom.</p>
<p>Threat Overview</p>
<p>This variant of Mydoom is similar to previous variants and bears the following characteristics:</p>
<p>-- mass-mailing worm constructing messages using its own SMTP engine</p>
<p>-- harvests email addresses from the victim machine</p>
<p>-- spoofs the From: address</p>
<p>-- contains a peer to peer propagation routine</p>
<p>-- downloads the BackDoor-CEB.f trojan</p>
<p>Users should be very wary and should most likely delete any email containing the following:</p>
<p>From: (spoofed From: header)</p>
<p>Do not assume that the sender address is an indication that the sender is infected. Additionally you may receive alert messages from a mail server that you are infected, which may not be the case.</p>
<p>The From: address may be spoofed with a harvested email address.</p>
<p>Additionally, it may be constructed so as to appear as a bounce, using the following addresses:</p>
<p>-- mailer-daemon@(target_domain)</p>
<p>-- noreply@(target_domain)</p>
<p>-- postmaster@(target_domain)</p>
<p>Subject: The following subjects are used:</p>
<p>-- delivered</p>
<p>-- hello</p>
<p>-- hi</p>
<p>-- error</p>
<p>-- status</p>
<p>-- test</p>
<p>-- report</p>
<p>-- delivery failed</p>
<p>-- Message could not be delivered</p>
<p>-- Mail System Error - Returned Mail</p>
<p>-- Delivery reports about your e-mail</p>
<p>-- Returned mail: see transcript for details</p>
<p>-- Returned mail: Data format error</p>
<p>Message Body: The virus constructs messages from pools of strings it carries in its body.</p>
<p>Threat Pathology</p>
<p>After being executed, copies itself into the Windows System directory, the worm installs itself as JAVA.EXE in the Windows directory.</p>
<p>For example:</p>
<p>It also drops the file SERVICES.EXE into this directory:</p>
<p>The following Registry keys are added to hook system startup:</p>
<p>-- HKEY_LOCAL_MACHINE\Software\Microsoft\Windows\CurrentVersion\Run</p>
<p>"JavaVM" = %WinDir%\JAVA.EXE</p>
<p>-- HKEY_LOCAL_MACHINE\Software\Microsoft\Windows\CurrentVersion\Run</p>
<p>"Services" = %WinDir%\SERVICES.EXE</p>
<p>The following Registry keys are also added:</p>
<p>-- HKEY_CURRENT_USER\Software\Microsoft\Daemon</p>
<p>-- HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Daemon</p>
<p> will show Windows Explorer listening on TCP Port 1034, the port the web server runs on.</p>
<p>System Protection and Cure</p>
<p>More information on and cure for this worm can be found online at the McAfee AVERT site located at . McAfee AVERT is advising its customers to update to the 4429 DATs to stay protected from this variant of the threat.</p>
<p>McAfee AVERT Labs is one of the top-ranked anti-virus and vulnerability research organisations in the world, employing researchers in thirteen countries on five continents. McAfee AVERT combines world-class malicious code and anti-virus research with intrusion prevention and vulnerability research expertise from the McAfee IntruShield, McAfee Entercept and McAfee Foundstone Professional Services organisations. McAfee AVERT protects customers by providing cures that are developed through the combined efforts of McAfee AVERT researchers and McAfee AVERT AutoImmune technology, which applies advanced heuristics, generic detection, and ActiveDAT technology to generate cures for previously undiscovered viruses.</p>
<p>About McAfee, Inc.</p>
<p>McAfee, Inc., headquartered in Santa Clara, Calif., creates best-of-breed intrusion prevention and risk management solutions. McAfee's market-leading security products and services help large, medium and small businesses, government agencies, and consumers prevent intrusions on networks and protect computer systems from critical threats. Additionally, through the Foundstone Professional Services division, leading security consultants provide security expertise and best practices for organisations. For more information, McAfee, Inc. can be reached on the Internet at .</p>
<p>NOTE: McAfee, AVERT, IntruShield, Entercept and Foundstone are either registered trademarks or trademarks of McAfee, Inc. and/or its affiliates in the United States and/or other countries. The colour Red in connection with security is distinctive of McAfee brand products. All other registered and unregistered trademarks herein are the sole property of their respective owners.</p>
<p>For further information please contact:</p>
<p>Natalie Connor</p>
<p>Tel: +61 (0)2 9956 5733</p>
<p>Mobile: +61 (0)417 259 054</p>

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