TrojanDownloader:Java/OpenConnection.L is a  Java applet that attempts to download and execute files from a malicious web site. It often works in conjunction with Java/Classloader and Java/Bytverify that exploit a vulnerability in the ByteCode verifier component of the Microsoft VM, as described and fixed in MS03-011.

Java/Byteverify is a malicious Java applet that exploits a vulnerability in certain unpatched versions of Microsoft virtual machine (Microsoft VM). Details on the vulnerability can be found in Microsoft Security Bulletin MS03-011 at http://www.microsoft.com/technet/security/Bulletin/MS03-011.mspx

Trojan:Java/Classloader is a malicious Java applet that exploits a vulnerability in certain unpatched versions of Microsoft virtual machine (Microsoft VM). Details on the vulnerability can be found in Microsoft Security Bulletin MS03-011 at http://www.microsoft.com/technet/security/Bulletin/MS03-011.mspx

TrojanDownloader:Java/OpenConnection.M is a  Java applet that attempts to download and execute files from a malicious web site. It often works in conjunction with Java/Classloader and Java/Bytverify that exploit a vulnerability in the ByteCode verifier component of the Microsoft VM, as described and fixed in MS03-011.

TrojanDownloader:Java/OpenConnection.P is a  Java applet that attempts to download and execute files from a malicious web site. It often works in conjunction with Java/Classloader and Java/Bytverify that exploit a vulnerability in the ByteCode verifier component of the Microsoft VM, as described and fixed in MS03-011.

TrojanDownloader:Java/OpenConnection.Q is a  Java applet that attempts to download and execute files from a malicious web site. It often works in conjunction with Java/Classloader and Java/Bytverify that exploit a vulnerability in the ByteCode verifier component of the Microsoft VM, as described and fixed in MS03-011.

Exploit:Java/ByteVerify is a detection of malicious code that attempts to exploit a vulnerability in the Microsoft Virtual Machine (VM). This flaw enables attackers to execute arbitrary code on a user's machine such as writing, downloading and executing additional malware. This vulnerability is addressed by update MS03-011, released in 2003.

Exploit:Java/ByteVerify.C is a detection of malicious code that attempts to exploit a vulnerability in the Microsoft Virtual Machine (VM) in order to download and execute arbitrary files on a user's machine. This vulnerability is addressed by update MS03-011, released in 2003.

Exploit:HTML/IFrame_Exploit.E is a detection of code that exploits a vulnerability to automatically execute e-mail attachments without user intervention. Exploit:HTML/IFrame_Exploit.E is typically associated with mass-mailing worms and other malware that is distributed via spam.

Trojan:Java/Classloader.D is a malicious Java applet that can infect Microsoft Windows computers that are not patched with Microsoft Security Update MS03-011. An attacker can insert the Java applet into HTML code and host the code on a Web server or send the code in e-mail. When a user opens the malicious Web page or e-mail, the vulnerability allows the applet to bypass a security check on the computer. The applet can then run malicious code on the computer and open a backdoor to receive commands from attackers.