1. Symantec/
  2. Security Response/
  3. W32.Sober@mm


Risk Level 2: Low

October 24, 2003
February 13, 2007 12:12:34 PM
Also Known As:
W32/Sober@MM [McAfee], I-Worm.Sober [Kaspersky], W32/Sober-A [Sophos], WORM_SOBER.A [Trend]. Sober [F, W32/Sober.A@mm [Frisk], W32/Sober.A [Norman], Win32/Sober.A [Eset], Win32.Sober.A [Computer Associ
Systems Affected:

W32.Sober@mm is a mass-mailing worm that uses its own SMTP engine to spread itself. The subject of the email varies, and it will be in either English or German.

The name of the email attachment varies, and it will have a .bat, .com, .exe, .pif, or .scr file extension.

This threat is written in the Microsoft Visual Basic programming language and is compressed with UPX.

When W32.Sober@mm is first run, it may display the fake error message "File not complete!"

Note: Virus definitions dated October 24, 2003, revision 20 and greater, will detect this threat.

Symantec Security Response has developed a removal tool to clean the infections of W32.Sober@mm.

Antivirus Protection Dates

  • Initial Rapid Release version October 24, 2003
  • Latest Rapid Release version August 8, 2016 revision 023
  • Initial Daily Certified version October 24, 2003
  • Latest Daily Certified version August 9, 2016 revision 001
  • Initial Weekly Certified release date October 24, 2003
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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