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


Risk Level 3: Moderate

November 19, 2005
February 13, 2007 12:46:35 PM
Also Known As:
CME-681, WORM_SOBER.AG [Trend Micro], W32/Sober-{X, Z} [Sophos], Win32.Sober.W [Computer Associ, Sober.Y [F-Secure], W32/Sober@MM!M681 [McAfee], W32/Sober.AA@mm [Norman], Win32/Sober.Z@mm [Microsoft]
Systems Affected:

W32.Sober.X@mm is a mass-mailing worm that uses its own SMTP engine to spread and lowers security settings. It sends itself as an email attachment to addresses gathered from the compromised computer. The email may be in either English or German.

Note: Symantec products that support the Worm Blocking functionality automatically detect this threat as it attempts to spread.

Antivirus Protection Dates

  • Initial Rapid Release version November 19, 2005
  • Latest Rapid Release version August 8, 2016 revision 023
  • Initial Daily Certified version November 19, 2005
  • Latest Daily Certified version August 9, 2016 revision 001
  • Initial Weekly Certified release date November 22, 2005
Click here for a more detailed description of Rapid Release and Daily Certified virus definitions.
Writeup By: Takayoshi Nakayama

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