1. Symantec/
  2. Security Response/
  3. W32.Netsky.M@mm


Risk Level 2: Low

March 10, 2004
February 13, 2007 12:18:53 PM
Also Known As:
I-Worm.NetSky.m [Kaspersky], W32/Netsky.m@MM [McAfee], WORM_NETSKY.M [Trend], W32/Netsky-M [Sophos], Win32.Netsky.M [Computer Assoc
Systems Affected:

W32.Netsky.M@mm is a mass-mailing worm that uses its own SMTP engine to send itself to the email addresses it finds when scanning hard drives and mapped drives.

The "sender" of the email is spoofed, and its subject, message body, and attachment vary. The attachment has a .pif extension.

This threat is compressed with UPX.

  • Symantec Consumer products that support the Worm Blocking functionality automatically detect this threat as it attempts to spread.
  • The worm has an MD5 hash value of 0xC32DB5E91758E38CD8A46ACC85109CF2.

Antivirus Protection Dates

  • Initial Rapid Release version March 11, 2004
  • Latest Rapid Release version January 25, 2018 revision 023
  • Initial Daily Certified version March 11, 2004
  • Latest Daily Certified version January 26, 2018 revision 009
  • Initial Weekly Certified release date March 13, 2004
Click here for a more detailed description of Rapid Release and Daily Certified virus definitions.
Writeup By: Yana Liu

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