W32.Mydoom.J@mm

W32.Mydoom.J@mm is an encrypted, mass-mailing worm that arrives as an attachment with either a .pif, .scr, .exe, .cmd, .bat, or .zip extension. The worm also contains keylogging capabilities.

Unlike previous Mydoom variants, W32.Mydoom.J@mm does not appear to act as a backdoor, and it is similar in functionality to W32.Mydoom.A@mm.

This threat is written in C++ and is packed with UPX.

Protection

• Initial Rapid Release version April 20, 2004
• Latest Rapid Release version January 30, 2010 revision 018
• Initial Daily Certified version April 20, 2004
• Latest Daily Certified version January 30, 2010 revision 021
• Initial Weekly Certified release date April 20, 2004

Click here 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: Medium

Distribution

• Distribution Level: High