Exploit kit - Definition from the Hotspot Shield Glossary

An Exploit Kit is a malicious piece of software that is run on web servers with the expressed purpose of finding vulnerabilities in software on client machines and then exploiting these vulnerabilities by injecting harmful code onto the client’s machine.

Exploit Kits are different from standard hacking tools and methods as they often feature an easy to use interface, and offer features like statistics on attack successes, and easy to control settings. These type of exploits are becoming more and more advanced and are really potent as they require little cToding knowledge or even computer proficiency - Literally anyone with a basic knowledge of computing and the internet would be able to use one. Notable examples of exploit kits include Blackhole, Crimepack, RIG and MPack.