W32.Sober.F@mm

As of April 11, 2004, due to a decrease in submission rate, Symantec Security Response has downgraded this threat from a Category 3 to a Category 2 rating.

W32.Sober.F@mm is a variant of W32.Sober.E@mm, which spreads itself as an email attachment.

The Subject: and Body: of the email vary and are written in German or English.

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Notes:

• Symantec Consumer products that support the Worm Blocking functionality automatically detect this threat as it attempts to spread.
• The worm does not have a static MD5 hash value.

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W32.Sober.F@mm is written in Microsoft Visual Basic and is packed with UPX.

Protection

• Initial Rapid Release version April 4, 2004
• Latest Rapid Release version November 13, 2007 revision 038
• Initial Daily Certified version April 4, 2004
• Latest Daily Certified version January 15, 2008 revision 016
• Initial Weekly Certified release date April 4, 2004

Click here for a more detailed description of Rapid Release and Daily Certified virus definitions.

Threat Assessment

Wild

• Wild Level: Medium
• Number of Infections: 50 - 999
• Number of Sites: More than 10
• Geographical Distribution: Low
• Threat Containment: Easy
• Removal: Moderate

Damage

• Damage Level: Medium

Distribution

• Distribution Level: High