Troj/Tiotua-C

Aliases	Win32/Autoit.C worm
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	March 2007 (4.15)
Protection available since	14 January 2007 15:31:44 (GMT)
Detected by	All Sophos products

Troj/Tiotua-C is a Trojan for the Windows platform.

Troj/Tiotua-C includes functionality to access the internet and communicate with a remote server via HTTP.

When first run Troj/Tiotua-C copies itself to:

<Windows>\SVICHHOST.exe
<System>\SVICHHOST.exe

and creates the file <System>\setting.ini.

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

HKCU\Software\Microsoft\Windows\CurrentVersion\Run
Yahoo Messengger
<System>\SVICHHOST.exe

The following registry entry is changed to run SVICHHOST.exe on startup:

HKLM\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon
Shell
Explorer.exe SVICHHOST.exe

The following registry entries are set, disabling system software:

HKCU\Software\Microsoft\Windows\CurrentVersion\Policies\System
DisableTaskMgr
1

HKCU\Software\Microsoft\Windows\CurrentVersion\Policies\System
DisableRegistryTools
1

The following registry entry is set:

HKCU\Software\Microsoft\Windows\CurrentVersion\Policies\Explorer
NofolderOptions
1

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