W32.Netsky.O@mm

Risk Level 2: Low

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Discovered:: March 17, 2004
Updated:: February 13, 2007 12:19:12 PM
Also Known As:: W32/Netsky.o@MM [McAfee], WORM_NETSKY.O [Trend]
Type:: Worm
Systems Affected:: Windows 2000, Windows 95, Windows 98, Windows Me, Windows NT, Windows Server 2003, Windows XP

W32.Netsky.O@mm is a mass-mailing worm that uses its own SMTP engine to send itself to the email addresses it finds when scanning the hard drives and mapped drives. The "sender" of the email is spoofed, and its subject line and message body of the email vary.

The attachment is one of the following:

readme.pif
document.pif
data.pif
details.pif
msg.pif
message.pif

This threat is compressed with UPX.

Note:

Symantec Consumer products that support Worm Blocking functionality automatically detect this threat as it attempts to spread.
The worm executable has a static MD5 hash value of 0x9D7006E30FDF15E9C8E03E62534B3A3E

Antivirus Protection Dates

Initial Rapid Release version March 17, 2004
Latest Rapid Release version September 28, 2010 revision 054
Initial Daily Certified version March 17, 2004
Latest Daily Certified version September 28, 2010 revision 036
Initial Weekly Certified release date March 17, 2004

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: Moderate

Damage

Damage Level: Low

Distribution

Distribution Level: High

Writeup By: Yana Liu

Technical Details

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Internet Security Threat Report, Volume 16