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


Risk Level 2: Low

March 17, 2004
February 13, 2007 12:19:12 PM
Also Known As:
W32/Netsky.o@MM [McAfee], WORM_NETSKY.O [Trend]
Systems Affected:

W32.Netsky.O@mm is a mass-mailing worm that uses its own SMTP engine to send itself to the email addresses it finds when scanning the hard drives and mapped drives. The "sender" of the email is spoofed, and its subject line and message body of the email vary.

The attachment is one of the following:
    • readme.pif
    • document.pif
    • data.pif
    • details.pif
    • msg.pif
    • message.pif

This threat is compressed with UPX.

  • Symantec Consumer products that support Worm Blocking functionality automatically detect this threat as it attempts to spread.
  • The worm executable has a static MD5 hash value of 0x9D7006E30FDF15E9C8E03E62534B3A3E

Antivirus Protection Dates

  • Initial Rapid Release version March 17, 2004
  • Latest Rapid Release version September 12, 2017 revision 020
  • Initial Daily Certified version March 17, 2004
  • Latest Daily Certified version September 13, 2017 revision 002
  • Initial Weekly Certified release date March 17, 2004
Click here for a more detailed description of Rapid Release and Daily Certified virus definitions.
Writeup By: Yana Liu

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STAR Antimalware Protection Technologies
2016 Internet Security Threat Report, Volume 21
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