Antivirus 2009 infected the userinit.exe

[nicolai]

I got this nasty virus from installing a fake video codec.... I've managed to remove most of the virus using MBAM. However, it wont remove the infection of the userinit.exe, it keeps on popping up everytime I run MBAM even though I removed it the previous time.

I've tried to search for all userinits and it seems there are two more of those. When I upload them to a online scanner, all four show up as infected!

When I enter XP after the log-on screen I have to use Task Manager to manually start explorer, otherwise Windows won't load. And everytime I connect to the internet, the virus starts downloading more malware and redirect homepages. I've also tried F-secure but it's not able to find anything.

I would have reinstalled XP long time ago if I hadn't had a number of programs installed, which I am not able to reinstall easily. Is there anyway I can repair the userinit.exe-files? Please help me someone!

Malwarebytes' Anti-Malware 1.33

Database version: 1654

Windows 5.1.2600 Service Pack 3

2/2/2009 11:07:04 AM

mbam-log-2009-02-02 (11-07-04).txt

Scan type: Quick Scan

Objects scanned: 80120

Time elapsed: 10 minute(s), 38 second(s)

Memory Processes Infected: 0

Memory Modules Infected: 0

Registry Keys Infected: 0

Registry Values Infected: 0

Registry Data Items Infected: 2

Folders Infected: 0

Files Infected: 0

Memory Processes Infected:

(No malicious items detected)

Memory Modules Infected:

(No malicious items detected)

Registry Keys Infected:

(No malicious items detected)

Registry Values Infected:

(No malicious items detected)

Registry Data Items Infected:

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon\Userinit (Trojan.Agent) -> Data: c:\windows\system32\userinit.exe -> Quarantined and deleted successfully.

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon\Userinit (Trojan.Agent) -> Data: system32\userinit.exe -> Quarantined and deleted successfully.

Folders Infected:

(No malicious items detected)

Files Infected:

(No malicious items detected)

[Tigger93]

Hello and Welcome to Malwarebytes.org

If you're having Malware related issues with your computer that you're unable to resolve.

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[dwatson.exodus]

I had a similar problem a couple of days ago...but this PC's userinit.exe was totally missing. I copied it from another XP machine and that worked fine. I did have to use a boot CD to allow me to access the file system without Windows, since Windows wouldn't start.

There's more detail available on www.yourexodus.com by clicking on Free Help.

Hope it helps!

Dan