W32.Randex.D

W32.Randex.D is a network-aware worm that will copy itself to the following paths on computers with weak administrator passwords:

• \Admin$\system32\msmsgri32.exe
• \c$\winnt\system32\msmsgri32.exe

The worm will also drop a Backdoor Trojan detected as Backdoor.Roxy, which will listen on the following TCP ports:

• 3330
• 3331
• 3332
• 3361

NOTE:

• The virus definitions dated prior to July 31, 2003 detect the dropped file as Backdoor.Trojan.
• The detection for W32.Randex.D was updated in virus definitions dated August 6, 2003 to account for the discovery of a minor variant. This file exhibited the same characteristics as previous samples.

Protection

• Initial Rapid Release version June 28, 2003
• Latest Rapid Release version January 15, 2009 revision 049
• Initial Daily Certified version June 28, 2003
• Latest Daily Certified version January 20, 2009 revision 048
• Initial Weekly Certified release date June 28, 2003

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

Threat Assessment

Wild

• Wild Level: Low
• 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: Medium