There are no common symptoms associated with this threat. Alert notifications from installed antivirus software may be the only symptoms.
Exploit:JS/Mult.DU is a trojan that runs various exploit codes depending on the version of Java installed in the affected computer. It may also send certain information to a remote attacker.
What to do now
To detect and remove this threat and other malicious software that may be installed on your computer, run a full-system scan with an appropriate, up-to-date, security solution. The following Microsoft products detect and remove this threat:
This threat exploits known vulnerabilities in Java. After removing this threat, make sure that you install the updates available from the vendor. You can read more about vulnerabilities in Java, as well as where to download the software update from the following links:
It may be necessary to remove older versions of Java that are still present. Keeping old and unsupported versions of Java on your system presents a serious security risk. To read more about why you should remove older versions of Java, see the following information.