Published Feb 20, 2013 | Updated Sep 15, 2017


Severe |Detected with Windows Defender Antivirus

Aliases: Java/Exploit.Agent.NIF trojan (ESET) Troj/JavaDl-SA (Sophos) JV/Blacole-FET!29A92C3EEDD7 (McAfee) Exploit-FET!CVE2013-0431 (McAfee) Troj/JavaDl-UG (Sophos) Trojan.Maljava (Symantec) JV/Blacole-FET!29A92C3EEDD7 (McAfee) Exploit-FET!CVE2013-0431 (McAfee) Exploit.CVE2013-0422.13 (Dr.Web) Exploit-FET!Exploit-JAR (McAfee) Mal/JavaJar-B (Sophos) JV/Blacole-FHA!949BD2B7DE14 (McAfee) Troj/JavaDl-FC (Sophos) JAVA_EXPLOYT.BU (Trend Micro) RDN/Generic Exploit!1mz (McAfee) Troj/JavaDl-UL (Sophos) Exploit.Java.458 (Dr.Web) JV/Blacole-FHA!D0BA98FA1FE3 (McAfee) Exploit.Java.461 (Dr.Web) JV/Blacole-FHA!23C205BE86D0 (McAfee) Java/Exploit.Agent.NLX trojan (ESET) JAVA_EXPLOIT.WT (Trend Micro)


Windows Defender  detects and removes this threat.

This threat uses a Java vulnerability to download and run files on your PC, including other malware.

It runs when you visit a hacked or malicious website and you have a vulnerable version of Java.

The following versions of Java are vulnerable:

  • Java Development Kit, Java Runtime Environment 7 Update 11 and earlier

To check if you're running a vulnerable version of Java:

  1. Go to the control panel (Select Start then Control Panel)
  2. Select Programs. If Java is installed you will see it in the list of installed programs. Click it to open the Java Control Panel.
  3. On the General tab, click About to see which version of Java you have installed.

You might get an alert about this threat even if you're not using a vulnerable version of Java. This is because we detect when a website tries to use the vulnerability, even if it isn't successful.

Run antivirus or antimalware software

Use the following free Microsoft software to detect and remove this threat:

You should also run a full scan. A full scan might find hidden malware.

You can also visit the Microsoft virus and malware community for more help.

Update Java

Make sure you install all available Java updates. You can read more about this vulnerability and download software updates from these links:

You should remove older versions of Java, as keeping old and unsupported versions of Java on your PC is a serious security risk:

If you continue to get alerted about this threat, deleting your temporary Java files can help:

It's also important to keep your other software up to date:

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