Problema con Virus

[AlienArmy]

Ho come anti-virus l'Avast 4.1; da un po' di tempo a questa parte, almeno 4/5 volte al giorno, mi appare la finestra "virus rilevato" con i seguenti dati:

Name: Win32:Rbot-Z [Trj]
Filename: C:\WINDOWS\system32\msnmsgr.exe

Ogni volta sembra non abbia problemi a cancellarlo, ma ogni volta, dopo non molto tempo, riappare la finestra. Nella cartella system32 non trovo tale file e quindi non so proprio come risolvere il problema.
In ogni caso non crea problemi visibili (almeno per ora) al sistema.

Grazie per eventuale risposte.

Ciao

[netquik]

ormai con i nomi dei virus non si capisce più molto

(ma perchè non si mettono d'accordo?!?!)



ti consiglio prima di tutto di aiutarti con un antivirus online

tipo trendmicro

e vedi un po se trova qualcosa

[ring]

Il virus che ti ha trovato non è altro che il W32.Spybot.worm.
Per saperne di più (anche e soprattutto sulla rimozione) visita la pagina W32.Spybot.worm (http://securityresponse.symantec.com/avcenter/venc/data/w32.spybot.worm.html).
Sophos (un famoso antivirus) classifica lo spybot.worm come alias del virus che hai trovato tu; quindi, vai tranquillo.

Fammi sapere

Ciao

[netquik]

http://forum.amdplanet.it/viewtopic.php?t=5963


da un altro thread recente


è un nuovo virus

[AlienArmy]

ma in quel thread lì fa editare un processo che nel mio pc è messanger e nel suo no, quindi nn funziona.
Mentre invece ho guardato sulla pagina symantec corrispondente, ma non c'è scritto come debellarlo.

[ring]

Mi spiace contraddirti, ma c'è scritto come debellarlo; solo che è un po' incasinato.
Ti riporto il testo

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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.
Restart the computer in Safe mode or VGA mode.
Run a full system scan, and delete all files that are detected as W32.Spybot.Worm.
Delete the value that was added to the registry.
Delete any zero-byte files in the Startup folder.

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

1. 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"

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. To update the virus definitions
Symantec Security Response fully tests all 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. To restart the computer in Safe mode or VGA mode
Shut down the computer and turn off the power. Wait for at least 30 seconds, and then restart the computer in Safe mode or VGA mode.
For Windows 95, 98, Me, 2000, or XP users, restart the computer in Safe mode. For instructions, read the document, "How to start the computer in Safe Mode."
For Windows NT 4 users, restart the computer in VGA mode.


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.Spybot.Worm, write down the file names, and then click Delete.

5. To delete 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 any values that refer to the file name that was detected as infected with W32.Spybot.Worm.


Navigate to the following key:

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\
RunOnce


In the right pane, delete any values that reference the file name in step d.


Navigate to the following key:

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\
RunServices


In the right pane, delete any values that reference the file name in step d.


Navigate to the following key:

HKEY_CURRENT_USER\SOFTWARE\Microsoft\Windows\CurrentVersion\Run


In the right pane, delete any values that reference the file name in step d.


Exit the Registry Editor.

6. To delete the zero-byte files from the Startup folder
Follow the instructions for your version of Windows:

Note: There may be legitimate files on your system that start with "tftp." Delete only the zero-byte files from the Startup folder.

To delete zero-byte files in Windows 95/98/Me/NT/2000
On the Windows taskbar, click Start > Find (or Search) > Files or Folders.
Make sure that "Look in" is set to (C:) and that "Include subfolders" is checked.
In the "Named" or "Search for..." box, type, or copy and paste, the following file name:

tftp*.*

Click Find Now or Search Now.
Delete the files that are zero-bytes in size and contained within any folder whose name ends with "Startup."

To delete zero-byte files in Windows XP
On the Windows taskbar, click Start > Search.
Click "All files and folders."
In the "All or part of the file name" box, type, or copy and paste, the following file name:

tftp*.*

Verify that "Look in" is set to "Local Hard Drives" or to (C:).
Click "More advanced options."
Check "Search system folders."
Check "Search subfolders."
Click Search.
Delete the files that are zero-bytes in size and contained within any folder whose name ends with "Startup."

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Se hai bisogno, fammi sapere.

Ciao

[AlienArmy]

grazie per avermi contraddetto ;) ora guardo tutto e provo.

[netquik]

leggi anche qui
http://www.trendmicro.com/vinfo/virusencyclo/default5.asp?VName=WORM_RBOT.QA