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Threat Advisory: McAfee AVERT Raises Risk Assessment to Medium on New W32/Bagle.ag@MM Virus

  • 19 July, 2004 17:30

<p>McAfee AVERT Reports New Bagle Virus In-the-Wild</p>
<p>SYDNEY, July 19, 2004 —McAfee, Inc. the leading provider of intrusion prevention solutions, today announced that McAfee AVERT (Anti-virus and Vulnerability Emergency Response Team), the world-class research division of McAfee, raised the risk assessment to Medium on the recently discovered W32/Bagle.ag@MM, also known as Bagle.ag. This new variant is a mass-mailing worm that comes in the form of a password-protected .ZIP file, with the password included in the message body as plain text or within an image.</p>
<p>To date, McAfee AVERT has received close to 150 reports of the virus in a relatively short period of time, being stopped or infecting users from the field—with most of the reports arriving from the Asia, the United Kingdom, and the United States. The majority of samples received by McAfee AVERT have been from users versus the virus, which is similar to other Bagle reports.</p>
<p>Threat Overview</p>
<p>Bagle.ag is a mass mailing threat that contains its own SMTP engine to construct outgoing messages. It harvests addresses from local files and then uses the harvested addresses in the ‘From’ field to send itself. This produces a message with a spoofed From address. The attachment can be a password-protected zip file, with the password included in the message body. It contains a remote access component (notification is sent to hacker) and uses mutex names from variants of W32/Netsky to prevent those W32/Netsky variants running on infected machines. Users should be very weary and should most likely delete any email containing the following:</p>
<p>From: (address is spoofed)</p>
<p>Subject:</p>
<p>• Password: %s</p>
<p>• Pass - %s</p>
<p>• Key - %s</p>
<p>• Re:</p>
<p>• Re:</p>
<p>• foto3</p>
<p>• fotogalary</p>
<p>• fotoinfo</p>
<p>• Lovely animals</p>
<p>• Animals</p>
<p>• Predators</p>
<p>• The snake</p>
<p>• Screen</p>
<p>Body Text:</p>
<p>• (blank)</p>
<p>Threat Pathology</p>
<p>After being executed, Bagle.ag copies itself into the Windows System directory (C:\WINNT\SYSTEM32\sys_xp.exe). The worm also creates sys_xp.exeopen and sys_xp.exeopenopen in this directory to perform its functions. The following Registry key is added to hook system startup:</p>
<p>• HKEY_CURRENT_USER\Software\Microsoft\Windows\
CurrentVersion\Run "key " = "C:\WINNT\SYSTEM32\sys_xp.exe"</p>
<p>Bagle.ag also copies itself to folders that have the phrase shar in the name, such as common peer-to-peer applications; KaZaa, Bearshare, Limewire, etc. The worm then emails itself to addresses found on the infected host as a password protected .ZIP file with the password included in the message body.</p>
<p>System Protection and Cure</p>
<p>More information on Bagle.ag and cure for this worm can be found online at the McAfee AVERT site located at http://vil.nai.com/vil/content/v_126795.htm. McAfee AVERT is advising its customers to update to the 4378 DATs to stay protected from all the current Bagle threats.</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 and McAfee Entercept organisations, two research arms that were acquired through the IntruVert Networks and Entercept Security. 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>With headquarters in Santa Clara, Calif., McAfee, Inc. (NYSE: MFE) creates best-of-breed computer security solutions that prevent intrusions on networks and protect computer systems from the next generation of blended attacks and threats. McAfee’s customers span large enterprises, governments, small and medium sized businesses, and consumers. For more information, McAfee, Inc. can be reached on the Internet at http://www.mcafee.com/.</p>
<p># # #</p>
<p>NOTE: McAfee and AVERT are either registered trademarks or trademarks of McAfee, Inc. and/or its affiliates in the United States and/or other countries. All other registered and unregistered trademarks herein are the sole property of their respective owners. *2004 McAfee, Inc. All Rights Reserved</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>
<p>E-mail: natalie.connor@text100.com.au</p>

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