We're gradually updating threat actor names in our reports to align with the new weather-themed taxonomy. Learn about Microsoft threat actor names
JS/Neclu
Aliases: Nuclear (other)
Summary
Windows Defender detects and removes this threat.
This website checks to see if your PC is running a vulnerable version of Java or Adobe Reader. You might be redirected to this website when you visit a hacked or malicious webpage.
If your PC has vulnerable software installed, this threat can download other malware, including:
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.
The following free Microsoft software detects and removes this threat:
- Microsoft Defender Antivirus for Windows 10 and Windows 8.1, or Microsoft Security Essentials for Windows 7 and Windows Vista
- Microsoft Safety Scanner
Even if we've already detected and removed this particular threat, running a full scan might find other malware that is hiding on your PC.
Update Java
Make sure you install all available Java updates.
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:
Get more help
You can also see our advanced troubleshooting page for more help.
If you’re using Windows XP, see our Windows XP end of support page.
