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hi everytime i start up my computer this is in my task manager avserve2.exe and it takes up cpu usage i did a avg scan and nothing came up i even tried too delete it but it still starts up?

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Its a worm. Here is how to get rid of it manually


Reboot the system into Safe Mode (hit the F8 key as soon as the Starting Windows text is displayed, choose Safe Mode.


Delete the file AVSERVE.EXE from your WINDOWS directory (typically c:\windows or c:\winnt)

Edit the registry


Delete the "avserve" value from




Reboot the system into Default Mode

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I would go here and do a test!




And do you use any spyware programs? Like adawre or spysweeper?

Edit: Andif your using XP you have to turn off system resotre! The virus or worms will hide in there! To turn it off right click on my computer....click properties....then click on the system restore taB! Then check the box that says turn system resotre off! The after you get rid of everything just uncheck the box !

Edited by merlin_
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thanks guys for the help i did a test with trend and i had about 13 virus and the new one on my computer that was doing lsass.exe but i had avg on my computer why didint it find all of them?

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That would be why it came back. So I guess the answer to that would be a big YES. Give one of these two a try,






Then go and do the virus scan again after you have installed the firewall.


gordesky1 Posted on May 2 2004, 03:29 AM


thanks guys for the help i did a test with trend and i had about 13 virus and the new one on my computer that was doing lsass.exe but i had avg on my computer why didint it find all of them?  

Depending on which viruses and how long you have had it (and with no firewall running, probably from the first time you took the computer online), a lot of them have the capabiltiy to disable virus scanners.

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Did you turn system restore off? You have to or the viruses will keep coming back! In the virus checker did you click auto clean?


Donwload this and use it! Finds stuff adaware and spybot doesnt!






then download this and use it!! It could still be in your trakcs>



then use this program and post your results here! they'll get your computer virus free!





Edited by merlin_
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Yup you have W32.Sasser worm:

Go Here and save that file to your desktop or something then run it. And then go into safe mode and re-run it. Then reboot your computer no matter what if it found stuff or if it didnt either time around. Do some online scans,ad-aware/spyware scans.. and you should be fixed up :) .. also search your computer for aserve, and aserve2 and delete anything that comes up. Delete the key as well. Only if the scan did not delete it by itself.


Heres some technical info. But run the removal tool immediately. It should do ALL the work for you but just in case after you run it check for leftovers.


When W32.Sasser.Worm runs, it does the following:


Attempts to create a mutex called Jobaka3l and exits if the attempt fails. This ensures that no more than one instance of the worm can run on the computer at any time.


Copies itself as %Windir%\avserve.exe.




Note: %Windir% is a variable. The worm locates the Windows installation folder (by default, this is C:\Windows or C:\Winnt) and copies itself to that location.




Adds the value:




to the registry key:




so that the worm runs when you start Windows.



Uses the AbortSystemShutdown API to hinder attempts to shut down or restart the computer.



Starts an FTP server on TCP port 5554. This server is used to spread the worm to other hosts.



Attempts to connect to randomly-generated IP addresses on TCP port 445. If a connection is made to a computer, the worm sends shellcode to that computer which may cause it to run a remote shell on TCP port 9996. The worm then uses the shell to cause the computer to connect back to the FTP server on port 5554 and retrieve a copy of the worm. This copy will have a name consisting of 4 or 5 digits followed by _up.exe (eg 74354_up.exe).


The IP addresses generated by the worm are distributed as follows:

50% are completely random

25% have the same first octet as the IP address of the infected host

25% have the same first and second octet as the IP address of the infected host.


The worm starts 128 threads that scan randomly-chosen IP addresses. This demands a lot of CPU time and as a result an infected computer may be so slow as to be barely useable.





Symantec Security Response encourages all users and administrators to adhere to the following basic security "best practices":


Turn off and remove unneeded services. By default, many operating systems install auxiliary services that are not critical, such as an FTP server, telnet, and a Web server. These services are avenues of attack. If they are removed, blended threats have less avenues of attack and you have fewer services to maintain through patch updates.

If a blended threat exploits one or more network services, disable, or block access to, those services until a patch is applied.

Always keep your patch levels up-to-date, especially on computers that host public services and are accessible through the firewall, such as HTTP, FTP, mail, and DNS services.

Enforce a password policy. Complex passwords make it difficult to crack password files on compromised computers. This helps to prevent or limit damage when a computer is compromised.

Configure your email server to block or remove email that contains file attachments that are commonly used to spread viruses, such as .vbs, .bat, .exe, .pif and .scr files.

Isolate infected computers quickly to prevent further compromising your organization. Perform a forensic analysis and restore the computers using trusted media.

Train employees not to open attachments unless they are expecting them. Also, do not execute software that is downloaded from the Internet unless it has been scanned for viruses. Simply visiting a compromised Web site can cause infection if certain browser vulnerabilities are not patched.



Removal using the W32.Sasser Removal Tool

Symantec Security Response has developed a removal tool to clean the infections of W32.Sasser.Worm. This is the easiest way to remove this threat and should be tried first.


Manual Removal

The following instructions pertain to all current and recent Symantec antivirus products, including the Symantec AntiVirus and Norton AntiVirus product lines.



End the malicious process.

Disable System Restore (Windows Me/XP).

Update the virus definitions.

Run a full system scan and delete all the files detected as W32.Sasser.Worm.

Reverse the change made to the registry.


For details on each of these steps, read the following instructions.


1. To end the malicious process

To end the malicious process:

Press Ctrl+Alt+Delete once.

Click Task Manager.

Click the Processes tab.

Double-click the Image Name column header to alphabetically sort the processes.

Scroll through the list and look for the following processes:


any process with a name consisting of 4 or 5 digits followed by _up.exe (eg 74354_up.exe).

If you find any such process, click it, and then click End Process.

Exit the Task Manager.


2. To disable System Restore (Windows Me/XP)

If you are running Windows Me or Windows XP, we recommend that you temporarily turn off System Restore. Windows Me/XP uses this feature, which is enabled by default, to restore the files on your computer in case they become damaged. If a virus, worm, or Trojan infects a computer, System Restore may back up the virus, worm, or Trojan on the computer.


Windows prevents outside programs, including antivirus programs, from modifying System Restore. Therefore, antivirus programs or tools cannot remove threats in the System Restore folder. As a result, System Restore has the potential of restoring an infected file on your computer, even after you have cleaned the infected files from all the other locations.


Also, a virus scan may detect a threat in the System Restore folder even though you have removed the threat.


For instructions on how to turn off System Restore, read your Windows documentation, or one of the following articles:

"How to disable or enable Windows Me System Restore"

"How to turn off or turn on Windows XP System Restore"



Note: When you are completely finished with the removal procedure and are satisfied that the threat has been removed, re-enable System Restore by following the instructions in the aforementioned documents.



For additional information, and an alternative to disabling Windows Me System Restore, see the Microsoft Knowledge Base article, "Antivirus Tools Cannot Clean Infected Files in the _Restore Folder," Article ID: Q263455.


3. To update the virus definitions

Symantec Security Response fully tests all the virus definitions for quality assurance before they are posted to our servers. There are two ways to obtain the most recent virus definitions:


Running LiveUpdate, which is the easiest way to obtain virus definitions: These virus definitions are posted to the LiveUpdate servers once each week (usually on Wednesdays), unless there is a major virus outbreak. To determine whether definitions for this threat are available by LiveUpdate, refer to the Virus Definitions (LiveUpdate).

Downloading the definitions using the Intelligent Updater: The Intelligent Updater virus definitions are posted on U.S. business days (Monday through Friday). You should download the definitions from the Symantec Security Response Web site and manually install them. To determine whether definitions for this threat are available by the Intelligent Updater, refer to the Virus Definitions (Intelligent Updater).


The Intelligent Updater virus definitions are available: Read "How to update virus definition files using the Intelligent Updater" for detailed instructions.


4. To scan for and delete the infected files

Start your Symantec antivirus program and make sure that it is configured to scan all the files.

For Norton AntiVirus consumer products: Read the document, "How to configure Norton AntiVirus to scan all files."

For Symantec AntiVirus Enterprise products: Read the document, "How to verify that a Symantec Corporate antivirus product is set to scan all files."

Run a full system scan.

If any files are detected as infected with W32.Sasser.Worm, click Delete.


5. To reverse the change made to the registry




WARNING: Symantec strongly recommends that you back up the registry before making any changes to it. Incorrect changes to the registry can result in permanent data loss or corrupted files. Modify the specified keys only. Read the document, "How to make a backup of the Windows registry," for instructions.



Click Start, and then click Run. (The Run dialog box appears.)

Type regedit


Then click OK. (The Registry Editor opens.)



Navigate to the key:





In the right pane, delete the value:





Exit the Registry Editor.

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yep i aways have restore off and i ran the test and it didint find anything and than i check my self and i didint find anything and my firewall still pops up and keep showing ntoskrnl.exe and the firewall blocks it does that meen i dont have it?

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