W32.Sahay.C@mm

Risk Level 1: Very Low

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Discovered:: March 31, 2003
Updated:: February 13, 2007 11:45:04 AM
Type:: Worm
Systems Affected:: Windows 2000, Windows 95, Windows 98, Windows Me, Windows NT, Windows XP

W32.Sahay.C@mm is a mass-mailing worm that uses Microsoft Outlook to spread itself to all the contacts in the Outlook Address Book. The email has the following characteristics:

Subject: Fw: Sit back and be surprised.
Attachment: MathMagic.scr

The worm attempts to prepend itself to all the .exe files that it finds in the \Windows folder and in the C:\Program Files\Mirc\Download folder.

Due to bugs in the worm's code, this threat may crash the computer or corrupt files in these folders. Then, the worm will restart the computer.

Antivirus Protection Dates

Initial Rapid Release version April 1, 2003
Latest Rapid Release version September 28, 2010 revision 054
Initial Daily Certified version April 1, 2003
Latest Daily Certified version September 28, 2010 revision 036
Initial Weekly Certified release date April 2, 2003

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

Threat Assessment

Wild

Wild Level: Low
Number of Infections: 0 - 49
Number of Sites: 0 - 2
Geographical Distribution: Low
Threat Containment: Easy
Removal: Easy

Damage

Damage Level: Low

Distribution

Distribution Level: High

Writeup By: Yana Liu

Technical Details

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Internet Security Threat Report, Volume 16