Troj/Theef-N

Aliases	Backdoor.Win32.Theef.109 W32/Theef.C@bd BackDoor-QW trojan BKDR_DELF.AV Win32/Delf.DY trojan
Category	Viruses and Spyware
Type	Trojan
What to do	If you've received an alert for a virus or spyware, then follow the instructions for removing the threat.
Prevalence	low high

Summary


Affected operating systems	Windows
Characteristics	Installs itself in the registry
Included in our products from	April 2006 (4.04)
Protection available since	16 February 2006 20:56:31 (GMT)
Detected by	All Sophos products

Troj/Theef-N is a backdoor Trojan which allows a remote intruder to gain access and control over the computer.

When first run Troj/Theef-N copies itself to <Windows>\halmon.exe and creates the following files:

\[RandomName].bat
<Windows>\winhnd64.drv

The files [RandomName].bat and winhnd64.drv are clean and can be deleted.

The following registry entry is created to run halmon.exe on startup:

HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Run
Hardware Mon
<Windows>\halmon.exe

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