Sophos

Troj/Dloader-AP

Category
Type
What to do
Prevalence low high

Summary

 
Included in our products from January 2006 (4.01)
Protection available since 28 July 2004 08:35:24 (GMT)
Last updated 17 November 2005 13:24:08 (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\Winhost = win.exe.

and delete it if it exists.

Close the registry editor.

More Information

Troj/Dloader-AP downloads and executes the file sys1st.exe which is detected by Sophos Anti-Virus as Troj/Dloader-AR.

The Trojan copies itself to the Windows folder with the filename win.exe and creates the following registry entry so that the Trojan is run when Windows starts up:

HKLM\Software\Microsoft\Windows\CurrentVersion\Run\Winhost = win.exe.

A file may be created in the root folder with the filename mc.com. This file can be safely deleted.

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