Please Help - Infected by svcsys.exe and Avast doesn't detect it!

[GeorgeFP]

I have been infected by svcsys.exe. It installed after I double clicked on my flash-disk and now I don't have access to my registry, task manager doesn't work and both my C-drive and DVD-drive disappeared out of My Computer. Worst of all Avast doesn't detect it, not even on boot-time scan with Archives turned on...any advice.

[Lisandro]

Can you use System Restore to return back to a previous system condition?
Before, if you can, send the file to virus (at) avast (dot) com for analysis.

[polonus]

Hi GeaorgeFP,



   
Troj/Fatoos-C
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

    * Summary
    * Action
    * More Information
    * 

 
Affected operating systems    Windows
Included in our products from    October 2004 (3.86)
Protection available since    26 August 2004 09:21:07 (GMT)
Detected by    
Action

    * Summary
    * Action
    * More Information
    * 

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 entries for each user who ran the virus. 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.

Each user has a registry area named HKEY_USERS\[code number indicating user]\. For each user locate the entries:

HKCU\Software\Microsoft\Windows\CurrentVersion\Run\MSSYSTEM
HKCU\Software\Microsoft\Windows\CurrentVersion\Run\MSSVC
HKCU\Software\FastWebTools

and delete them if they exist.

Close the registry editor.
More Information

    * Summary
    * Action
    * More Information
    * 

Troj/Fatoos-C is a downloader Trojan. The Trojan copies itself to the Windows system folder as svcsys.exe and downloads files to svcsp1.exe in the Windows system folder and C:\msdvx.exe.

In order to ensure that the Trojan and the downloaded files are run when Windows start Troj/Fatoos-C adds the following registry entries:

HKCU\Software\Microsoft\Windows\CurrentVersion\Run\MSSYSTEM
HKCU\Software\Microsoft\Windows\CurrentVersion\Run\MSSVC

Troj/Fatoos-C also adds registry entries under:

HKCU\Software\FastWebTools


polonus