Troj/Small-EX

Aliases	Trojan-Dropper.Win32.Small.ahg
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	February 2006 (4.02)
Protection available since	8 December 2005 03:18:45 (GMT)
Detected by	All Sophos products

Troj/Small-EX is a backdoor Trojan which can be used as a proxy and is capable of downloading and executing arbitrary files.

When run Troj/Small-EX creates the file <System>\child.dll and child.dll is detected by Sophos as Troj/Small-EX.

When run Troj/Small-EX sets the following registry entries:

HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\SharedTaskScheduler
(3F143C3A-1457-6CCA-03A7-7AA23B61E40F)
OLE Automation Module

HKCU\Software\Classes\CLSID\(3F143C3A-1457-6CCA-03A7-7AA23B61E40F)\InProcServer32
(default)
<System>\child.dll

Troj/Small-EX allows remote access on port 1234.

Get reports about the latest virus and spyware threats delivered to your computer