Discovered: April 20, 2004
Updated: February 13, 2007 12:55:57 PM
Also Known As: W32/Netsky.y@MM [McAfee], WORM_NETSKY.Y [Trend Micro], Win32.Netsky.Y [Computer Assoc, W32/Netsky-X [Sophos], I-Worm.NetSky.z [Kaspersky]
Type: Worm
Systems Affected: Windows 2000, Windows 95, Windows 98, Windows Me, Windows NT, Windows Server 2003, Windows XP
W32.Netsky.Y@mm is a variant of
W32.Netsky.X@mm that scans for the email addresses on all non-CD-ROM drives on an infected computer. Then, the worm uses its own SMTP engine to send itself to the email addresses that it finds.
The format of the email is:
Subject: Delivery failure notice (ID-<random number>)
Attachment: www.<random domain name>.<random username>.session-<random number>.com
This threat is compressed with PE-Pack.
Note:
- Symantec Consumer products that support Worm Blocking functionality automatically detect this threat as it attempts to spread.
- The worm has the MD5 hash value 0xbd9d6e41791e0703baf7ec8e61ee631e.
- Virus Definitions version 60420ah (extended version 4/20/2004 rev. 34) and greater are requred to detect this threat.
Protection
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Initial Rapid Release version April 20, 2004
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Latest Rapid Release version August 20, 2008 revision 017
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Initial Daily Certified version April 20, 2004
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Latest Daily Certified version January 20, 2009 revision 048
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Initial Weekly Certified release date April 20, 2004
Click for a more detailed description of Rapid Release and Daily Certified virus definitions.
Threat Assessment
Wild
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Wild Level: Medium
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Number of Infections: More than 1000
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Number of Sites: More than 10
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Geographical Distribution: Low
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Threat Containment: Easy
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Removal: Moderate
Damage
Distribution
Writeup By: Heather Shannon