We're gradually updating threat actor names in our reports to align with the new weather-themed taxonomy. Learn about Microsoft threat actor names
Exploit:HTML/Fiexp.B
Aliases: No associated aliases
Summary
Windows Defender detects and removes this threat.
HTML/Fiexp is a family of HTML pages containing JavaScript components belonging to an exploit kit called Fiesta. Similar to other exploit kits like Blacole, it first checks your browser, version, and installed plugins. It does this to determine what exploit to use on your PC. It can exploit vulnerabilities in Java, Adobe Flash Player, Adobe Acrobat Reader, Microsoft Silverlight, and Internet Explorer.
This threat might get into your PC if you visit a hacked or malicious website.
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.
You can also visit the Microsoft virus and malware community or our advanced troubleshooting page for more help.
If you’re using Windows XP, see our Windows XP end of support page.
Update Java, Adobe Acrobat and Reader, and Adobe Flash Player
Make sure you install all available updates. You can read more about these vulnerabilities and download software updates from these links:
- CVE-2013-2463
- CVE-2013-1493
- CVE-2012-0507
- Java Download
- CVE-2013-0634
- Adobe Flash Player advisory
- CVE-2011-2104
- Adobe Acrobat and Reader advisory
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:
