W32.Huayu

Risk Level 1: Very Low

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Discovered:: October 24, 2004
Updated:: February 13, 2007 12:29:00 PM
Also Known As:: Bloodhound.Exploit.8
Type:: Worm
Systems Affected:: Windows 2000, Windows XP

W32.Huayu is a worm that spreads by exploiting the Microsoft Windows LSASS Buffer Overrun Vulnerability, described in Microsoft Security Bulletin MS04-011. It only spreads to IP addresses between 211.159.93.0 and 211.159.93.255. This worm opens a backdoor on infected computers.

Note: Virus definitions dated prior to October 24, 2004 detect this threat as Bloodhound.Exploit.8.

Antivirus Protection Dates

Initial Rapid Release version October 24, 2004
Latest Rapid Release version September 28, 2010 revision 054
Initial Daily Certified version October 24, 2004
Latest Daily Certified version September 28, 2010 revision 036
Initial Weekly Certified release date October 27, 2004

Click for a more detailed description of Rapid Release and Daily Certified virus definitions.

Threat Assessment

Wild

Wild Level: Low
Number of Infections: 0 - 49
Number of Sites: 0 - 2
Geographical Distribution: Low
Threat Containment: Easy
Removal: Moderate

Damage

Damage Level: Medium

Distribution

Distribution Level: Medium

Writeup By: Heather Shannon

Technical Details

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Internet Security Threat Report, Volume 16