Virus probleem

Als je de 1e zinnen wat beter zou formuleren, met punten en komma’s, is het iets makkelijker te lezen.

Kan norton het bestand opsporen en verwijderen/in quarantine plaatsen of niet?

Hey ik weet niet of je er wat aan hebt maar wie weet, tis om te helpen:

technical details

When Trojan.ByteVerify is executed, it performs the following actions:

1. Escapes the sandbox restrictions, using Blackbox.class, by doing the following:

1. Declares a new PermissionDataSet with setFullyTrusted set to TRUE.

2. Creates a trusted PermissionSet.

3. Sets permission to PermissionSet by creating its own URLClassLoader class, derived from the VerifierBug.class.

2. Loads Beyond.class using the URLClassLoader from Blackbox.class.

3. Gains unrestricted rights on the local machine by invoking the .assertPermission method of the PolicyEngine class in Beyond.class.

4. Opens the Web page, http://www.clavus.net/lst.backs, and parses the text that this site displays.

For example, SP|http://www.ewebsearch.net/sp.htm means that the Internet Explorer Start Page will be set up to http://www.ewebsearch.net/sp.htm

5. Several pornographic links are added into the favorites.

6. May attempt to retrieve dialer programs and install them on the infected computer. The dialer programs may attempt to connect the infected computer to pornographic Web sites.

Notes:

* Trojan.ByteVerify will typically arrive as a component of other malicious content. An attacker could use the compiled Java class file to execute other code. The file will likely exist as VerifierBug.Class. For example, an attacker could create a .html file that uses the Trojan, and then create a script file that will perform other actions, such as setting the Internet Explorer Start Page.

* Notification of infection does not always indicate that a machine has been infected; it only indicates that a program included the viral class file. This does not mean that it used the malicious functionality.

recommendations

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 instructions

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

1. Disable System Restore (Windows Me/XP).

2. Update the virus definitions.

3. Restart the computer in Safe mode or VGA mode.

4. Run a full system scan and delete all the files detected as Trojan.ByteVerify.

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”

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. Restarting 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. Scanning for and deleting the infected files

1. 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.”

2. Run a full system scan.

3. If any files are detected as infected with Trojan.ByteVerify, click Delete.