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Thought I Removed Virus, Though Physical Memory Still High


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#1 Aaron Dubois

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Posted 13 March 2010 - 05:27 PM

Windows Vista Home Premium
Processor: Duo 2.33 GHz
RAM: 2 GB
32-bit

Greetings! About a week or 2 ago a virus infected my computer. It hijacked any search engines on my internet browsers' (IE 7 and FF) redirecting any searches to a 3rd party search website. I went through several virus and malware checkers and was able to restore my browsers. They currently work, and I assumed the virus was removed.

However, I have noticed since my Physical Memory is still running high, and has caused notable slowdown in applications where memory problems hadn't existed before. When the virus hit, physical memory was sitting at approx 1.5-1.75 GB, crushing my cpu. After running various antivar software, I was able to reduce the usage to approx. 1 GB with no other apps running. Still high, but improved.

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Other than the High phys memory, I've not noticed any other problems.

I've run AVG, Avira, and Avast! -- I currently only have Avast! installed on my machine
I've run Ad-Aware, Malware Bytes, and Spyware Terminator
I've tried to go through all my startup processes and so far haven't found anything that raised huge red flags.

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I'm hoping someone can help me start looking in a new direction. I consider myself average with my computer skills. I've done most of the easier steps, but definitely need some help with the next steps. Thanks for any help with this!

Aaron

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#2 quietman7

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Posted 15 March 2010 - 12:12 PM

Determining whether a file is malware or a legitimate process usually 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 like svchost.exe. However, it then places itself in a different location (folder) than where the legitimate file resides and runs from there. Another techinique is for the process to alter the registry and add itself as a Startup program or service so that it can run automatically each time the computer is booted. Keep in mind that a legitmate file can also be infected by some types of malware such as Virut which is a dangerous polymorphic file infector. A file's properties may give a clue to identifying it. Right-click on the file, choose Properties and examine the General and Version tabs.

Tools to investigate running processes and gather additional information to identify them and resolve problems:These tools will provide information about each process, CPU usage, file description and its path location.

Anytime you come across a suspicious file or one that you do not recognize, search the name using Google <- click here for an example.

Or search the following databases:If you cannot find any information, the file has a legitimate name but is not located where it is supposed to be, or you want a second opinion, submit it to Jotti's virusscan or VirusTotal. In the "File to upload & scan" box, browse to the location of the suspicious file and submit (upload) it for scanning/analysis.
-- Post back with the results of the file analysis.
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