We're gradually updating threat actor names in our reports to align with the new weather-themed taxonomy. Learn about Microsoft threat actor names
VirTool:JS/DonxRef.A
Aliases: No associated aliases
Summary
VirTool:JS/DonxRef.A is a generic detection for obfuscated JavaScript often found distributed through compromised websites. It contains malicious code designed to exploit vulnerabilities in Java and Adobe Flash Player. If your computer has vulnerable versions of these programs, VirTool:JS/DonxRef.A may download and run other malware.
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:
- Microsoft Security Essentials or, for Windows 8, Windows Defender
- Microsoft Safety Scanner
Update vulnerable Java applications
This threat exploits a known vulnerability in Java. After removing this threat, make sure that you install the updates available from the vendor. You can read more about this vulnerability in Java, as well as where to download the software update from the following link:
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.
Update vulnerable applications
This threat exploits known vulnerabilities in Adobe Flash Player. After removing this threat, make sure that you install the updates available from the vendor. You can read more about these vulnerabilities in Flash, as well as where to download the software update, from the following links:
