Microsoft security software detects and removes this family of threats.

This is a family of JavaScript components belonging to an exploit kit called Fiesta. Similar to other exploit kits, such as Blacole, it first checks your browser, version, and installed plugins. It does this to determine which exploit to use on your PC.

Malware in this family can exploit vulnerabilities in Java, Adobe Flash Player, Adobe Acrobat Reader, Microsoft Silverlight, and Internet Explorer.

They can run on your PC when you visit a hacked or malicious website.

Find out ways that malware can get on your PC.  

Windows Defender detects and removes this threat.

This is the detection for the landing page of the exploit kit Fiesta.

Windows Defender detects and removes this threat.

This threat can infect your PC if it is running vulnerable software, including:

• Adobe Flash Player version 10 update 3 and earlier, and version 11 update 5 and earlier.
• Silverlight version 5 and earlier.

If your PC has vulnerable software this threat can download other malware, including Win32/Miuref.

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

Windows Defender detects and removes this threat.

This threat can infect your PC if it is running vulnerable software, including:

• Adobe Flash Player version 10 update 3 and earlier, and version 11 update 5 and earlier.
• Silverlight version 5 and earlier.

If your PC has vulnerable software this threat can download other malware, including Win32/Miuref.

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

Find out ways that malware can get on your PC.  

Windows Defender detects and removes this threat.

The threat is a webpage that tries to exploit vulnerabilities in software on your PC. It can then try to download other malware.

It tries to exploit vulnerabilities in the following software:

• Java
• Adobe Flash Player
• Adobe Acrobat Reader
• Microsoft Silverlight
• Internet Explorer.

Members of the Fiexp family belong to the exploit kit called Fiesta.

See the family description for HTML/Fiexp and our page on exploits for more information.

This threat might get into your PC if you visit a hacked or malicious website.

Find out ways that malware can get on your PC.