How can I remove the Java/ByteVerify virus?


how should I remove the Java/ByteVerify virus ? My AVG Anti -Virus System will not remove it.


This question was answered on October 30, 2004. Much of the information contained herein may have changed since posting.


Malicious applets have been discovered in the Java Plug-in cache directory Anti-virus programs have detected such malicious applets in the following directory:

C:\Documents and Setting\\Application Data\Sun\Java\Deployment\cache\javapi\v1.0\jar

These malicious applets are designed to exploit vulnerabilities in Microsoft VM (Microsoft Security Bulletin MS03-011).

If you are using the Sun JVM as your default virtual machine, these malicious applets cannot cause any harm to your computer.


When the browser runs an applet, the Sun JVM stores all the downloaded files into its cache directory for better peroformance We have received reports of the following malicious applets in the Java Plug-in cache directory:



Java.JJBlack worm

Java.shinwow trojan

However, in this instance, storing these applets in the cache directory can not cause any harm to your computer because they are designed to exploit a vulnerability in the Microsoft VM, not the Sun JVM.


If you find one of these malicious applets on your computer, please use an anti-virus program to delete the applet, or you can clean the cache directory manually.

Here are the instructions on how to manually remove these malicious applets from the Java Plug-in cache directory:

From the Start button, click Settings > Control Panel In the Control Panel, open the Java Plug-in Control Panel.

Select the Cache Tab

Click the Clear button inside the Cache Tab, which will clear your Java Plug-in cache directory.


Norton/Symantec has posted information about the Trojan.ByteVerify virus on their Web site Symantec Virus help - Trojan.ByteVerify

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Posted by Henry of Katharine Gibbs School - New York on October 30, 2004