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Svchost.exe Changed. How Can I Replace It With Original Svchost.exe?


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#1 Sreeram

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Posted 30 January 2008 - 05:43 AM

Hi,

After a virus (Trojan) infection, I've found my svchost.exe in winnt\system32 folder has been changed. I tried to copy svchost.exe from another pc but it says, access denied. How can I replace it with real svchost.exe? I tried it in safe mode but still the same problem.

Rgs,

Sreeram
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#2 quietman7

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Posted 30 January 2008 - 09:44 AM

How do you know it was changed? Determining whether a file is malware or a legitimate process sometimes depends on the location (path) it is running from. One of the ways that malware tries to hide is to give itself the same name as a critical system file. However, it then places itself in a different location on your computer.
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#3 Sreeram

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Posted 31 January 2008 - 06:14 AM

How do you know it was changed? Determining whether a file is malware or a legitimate process sometimes depends on the location (path) it is running from. One of the ways that malware tries to hide is to give itself the same name as a critical system file. However, it then places itself in a different location on your computer.



Hi,

svchost.exe showing \winnt\system32 folder a modified date of 2 days before. I've been posted a similar case in Hijacktis log... Since I don't have any comments from users, I've to try to replace svchost.exe. But size of svchost.exe remains the same.

Rgs,

Sreeram :thumbsup:
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#4 quietman7

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Posted 31 January 2008 - 10:04 AM

Svchost.exe is a generic host process name for a group of services that are run from dynamic-link libraries (DLLs). It is not unusual for multiple instances of Svchost.exe running at the same time. To investigate these processes, see How to determine what services are running under a Svchost.exe process.
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#5 quietman7

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Posted 31 January 2008 - 11:28 AM

Sorry but my network went down and I was not able to finish my reply.

Your hijackthis log is posted here.

After posting a log you should NOT make further changes to your computer (install/uninstall programs, use special fix tools, delete files, edit the registry, etc) unless advised by a HJT Team member, nor should you continue to ask for help elsewhere. Doing so can result in system changes which may not show it the log you already posted. Further, any modifications you make on your own may cause confusion for the member assisting you and could complicate the malware removal process which would extend the time it takes to clean your computer.

From this point on the HJT Team should be the only members that you take advice from, until they have verified your log as clean.

If after 5 days you still have received no response, then post a link to your HJT log in the thread titled "Haven't Had A Reply In Five Days?".

To avoid confusion, I am closing this topic until you are cleared by the HJT Team. If you still need assistance after your log has been reviewed and you have been cleared, please PM me or another moderator and we will re-open this topic.

Thanks for your cooperation and good luck with your log.
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