Downloader.Inor.B

Downloader.Inor.B is a variant of Trojan.Downloader.Inor. This Trojan spreads as a .hta file. When this file is executed, it creates the %Windir%\System32\Usb_d2.exe file, and then executes it.

When Usb_d2.exe file is executed, it tries to download a file from a Web site.

Downloader.Inor.B may be received by email as an attachment, or a link to a Web site, which contains a CGI script that drops the Trojan.

Note: Detections prior to May 31st, 2006 may detect this threat as Trojan.Download.Inor.B.

Protection

• Initial Rapid Release version January 23, 2004
• Latest Rapid Release version June 22, 2009 revision 066
• Initial Daily Certified version January 23, 2004
• Latest Daily Certified version June 19, 2009 revision 051
• Initial Weekly Certified release date January 28, 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: Low

Distribution

• Distribution Level: Low