Bonjour,
 
Depuis peu je trouve que fréquament à l'apparition du bureau le système "charge" pendant une durée que je trouve anormalement longue.
 
Au démarrage, en lançant le gestionnaire des tâches je me suis rendu compte que l'utilisation du fichier d'échange augmente progressivement jusqu'à plus de 1 Go sur une durée de 3 à 4 minutes puis chute d'un coup à un peu plus de 100 Mo.
 

 
Pour info j'ai 512 Mo de Ram.
 
Est-ce que cela est normal ? Connaissez vous un virus qui pourrait en être la cause ?
 
Merci pour toute réponse éventuelle.

up ?

Tu peux lire mon sujet :
 
http://forum.pcastuces.com/sujet.asp?SUJET_ID=8269
 
copier le contenu du Bloc-notes et coller ici le résultat de l'analyse de HijackThis.

Pour ceux qui ont ce pb il s'agit peut-etre comme c'était mon cas de W32.HLLW.Theug. Allez faire un tour sur cette page http://www.symantec.com/avcenter/v [...] theug.html ou lisez ce qui est écrit ci dessous.
 
"
 
W32.HLLW.Theug is a worm that spreads using common file-sharing applications, such as KaZaA, Limewire, and Morpheus. The worm disguises itself using different file names, such as:  
 
[eBook]TheHacker.Zipped.exe  
PornStarPics.jpg.pif  
Girlfriend.pif  
StacyVale.pif  
Quake3Arena_KeyGens_Archive.exe  
[eBook]SexAndTheCity_Zipped.exe  
Warcraft3_KeyGens_Archive.exe  
[eBook]WebSiteDesign_Zipped.exe  
Antivirus 2  
WinZip 8.1 KeyGen.exe  
Personal Firewall Pro.exe  
WindowsXP SP2 Installer.exe  
Window Blinds Key Gen.Serial.exe  
Nero Burning Rom 5.5 KeyGen.exe  
Eminem - 8 Mile Screensaver.scr  
Adobe Photoshop 6 KeyGen.exe  
Stacy Valentine Blowjob Scene (rare).avi.pif  
Jenna Pool Blowjob Scene (rare).avi.pif
 
 
   
   
Type:  Worm  
Infection Length:  36,421 bytes  
   
   
   
Systems Affected:  Windows 2000, Windows 98, Windows Me, Windows NT, Windows Server 2003, Windows XP  
Systems Not Affected:  DOS, Linux, Macintosh, OS/2, UNIX, Windows 3.x  
   
   
   
 
 
 
Virus Definitions (Intelligent Updater) *
 October 27, 2003  
 
 
Virus Definitions (LiveUpdate?) **
 October 29, 2003  
 
 
*
 Intelligent Updater definitions are released daily, but require manual download and installation.
Click here to download manually.
 
**
 LiveUpdate virus definitions are usually released every Wednesday.
Click here for instructions on using LiveUpdate.
 
 
 
 
 
 
 
Wild:  
 
Number of infections: 0 - 49  
Number of sites: 0 - 2  
Geographical distribution: Low  
Threat containment: Easy  
Removal: Moderate  
 Threat Metrics
 
         
Wild:
Low
 Damage:
Low
 Distribution:
Medium
 
 
 
Distribution  
 
Shared drives: Copies itself to the KaZaA, LimeWire, and Morpheus shared folders.  
 
 
When W32.HLLW.Theug is executed, it performs the following actions:
 
 
Copies itself as:  
%Windir%\Systask32l.exe  
%System%\ln32k.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.
-- %System% is a variable. The worm locates the System folder and copies itself to that location. By default, this is C:\Windows\System (Windows 95/98/Me), C:\Winnt\System32 (Windows NT/2000), or C:\Windows\System32 (Windows XP).
 
--------------------------------------------------------------------------------
 
 
Creates the file, %Sysdir%\ln32k.dll.
 
 
Copies itself to "%program files%," "%program files%\Morpheus\My Shared Folder," "%program files%\LimeWire\Shared," and the KaZaA download folder as one of the following file names:
 
[eBook]TheHacker.Zipped.exe  
PornStarPics.jpg.pif  
Girlfriend.pif  
StacyVale.pif  
Quake3Arena_KeyGens_Archive.exe  
[eBook]SexAndTheCity_Zipped.exe  
Warcraft3_KeyGens_Archive.exe  
[eBook]WebSiteDesign_Zipped.exe  
Antivirus 2  
WinZip 8.1 KeyGen.exe  
Personal Firewall Pro.exe  
WindowsXP SP2 Installer.exe  
Window Blinds Key Gen.Serial.exe  
Nero Burning Rom 5.5 KeyGen.exe  
Eminem - 8 Mile Screensaver.scr  
Adobe Photoshop 6 KeyGen.exe  
Stacy Valentine Blowjob Scene (rare).avi.pif  
Jenna Pool Blowjob Scene (rare).avi.pif
 
 
Adds the value:
 
"SysService32l"="%windir%\systask32l.exe"
 
to the registry keys:
 
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run
HKEY_CURRENT_USER\SOFTWARE\Microsoft\Windows\CurrentVersion\RunOnce
HKEY_CURRENT_USER\SOFTWARE\Microsoft\Windows\CurrentVersion\Runonce
 
so that the worm runs when you start Windows.
 
 
Writes the local time to the file, %Sysdir%\ln32k.dll.
 
 
 
 
 
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.  
 
 
The following instructions pertain to all current and recent Symantec antivirus products, including the Symantec AntiVirus and Norton AntiVirus product lines.
 
 
Disable System Restore (Windows Me/XP).  
Update the virus definitions.  
Run a full system scan and delete all the files detected as W32.HLLW.Theug.  
Delete the value that was added to the registry.
 
For specific details on each of these steps, read the following instructions.
 
1. Disabling 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.
 
2. Updating 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.
 
3. Scanning for and deleting 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.HLLW.Theug, click Delete.
 
4. Deleting the value from 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:
 
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run
 
 
In the right pane, delete the value:
 
"SysServicel"="%windir%\systask32l.exe"
 
 
Navigate to the key:
 
HKEY_CURRENT_USER\SOFTWARE\Microsoft\Windows\CurrentVersion\RunOnce
 
 
In the right pane, delete the value:
 
"SysServicel"="%windir%\systask32l.exe"
 
 
Navigate to the key:
 
HKEY_CURRENT_USER\SOFTWARE\Microsoft\Windows\CurrentVersion\Runonce
 
 
In the right pane, delete the value:
 
"SysServicel"="%windir%\systask32l.exe"
 
 
Exit the Registry Editor.
 
 
 
 
 
Write-up by: Douglas Knowles  
 
 
 
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