Sophos

Troj/Boxed-H

Category
Type
What to do
Prevalence low high

Summary

 
Affected operating systems Windows
Included in our products from February 2005 (3.90)
Protection available since 10 January 2005 13:30:37 (GMT)
Detected by All Sophos products

Action

Please follow the instructions for removing Trojans.

Windows NT/2000/XP/2003

In Windows NT/2000/XP/2003 you will also need to edit the following registry entry. The removal of this entry is optional in Windows 95/98/Me. Please read the warning about editing the registry.

At the taskbar, click Start|Run. Type 'Regedit' and press Return. The registry editor opens.

Before you edit the registry, you should make a backup. On the 'Registry' menu, click 'Export Registry File'. In the 'Export range' panel, click 'All', then save your registry as Backup.

Locate the HKEY_LOCAL_MACHINE entry:

HKLM\Software\Microsoft\Windows\CurrentVersion\Run\
.norton

and remove any reference to any file you deleted.

Close the registry editor.

More Information

Troj/Boxed-H is a DoS flooder Trojan.

Troj/Boxed-H copies itself with the filename RCHOST.EXE to either the system subfolder of the Windows folder or to the folder Application Data\Microsoft\Internet Explorer. Troj/Boxed-H then sets an entry in the registry at the following location so as to run itself on system startup:

HKLM\Software\Microsoft\Windows\CurrentVersion\Run\
.norton

If Troj/Boxed-H finds an entry already at this location in the registry it attempts to copy itself to the file it finds there.

Troj/Boxed-H runs continuously in the background sending packets to addresses as part of a DoS attack.

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