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


Risk Level 2: Low

January 30, 2005
February 13, 2007 12:32:45 PM
Also Known As:
Win32.Sober.J [Computer Associ, Sober.J [F-Secure], Email-Worm.Win32.Sober.j [Kasp, W32/Sober.k@MM [McAfee], W32/Sober-K [Sophos], WORM_SOBER.J [Trend Micro]
Systems Affected:

W32.Sober.J@mm is a mass-mailing worm that uses its own SMTP engine to send itself to email addresses it gathers from the compromised computer.

The subject of the email varies and is in either English or German. The email sender address is spoofed. The name of the email attachment varies, and it has a .bat, .com, .pif, .scr, or .zip file extension. The attachment may also have a double extension.

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

Antivirus Protection Dates

  • Initial Rapid Release version January 31, 2005
  • Latest Rapid Release version September 28, 2010 revision 054
  • Initial Daily Certified version January 31, 2005
  • Latest Daily Certified version September 28, 2010 revision 036
  • Initial Weekly Certified release date January 31, 2005
Click here for a more detailed description of Rapid Release and Daily Certified virus definitions.
Writeup By: Takayoshi Nakayama

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