Cache cramming

What is cache cramming?
Cache cramming is the process by which a computer executes a malicious file that would otherwise be restricted. It runs a small program in the browser cache that enables hackers / crackers to locally detect open ports and / or access target computers.

Cache cramming works when an applet or Java code is downloaded to a user's computer while visiting an infected website. This Java code, which disguises itself as an applet and usually as a port scanner, runs in the background and begins to look for and scan for open ports. The information about such vulnerable ports is sent back to the hacker / cracker, who then uses the information to gain access to the victim's computer.

Typically, cache cramming primarily affects computers using the Internet Explorer (IE) browser.