Researchers find new type of ‘fileless’ malware

Researchers have discovered an extremely rare and possibly unique form of “fileless” malware that executes entirely in memory without the need to save any files to the hard drive of a victim’s PC.

The latest discovery was made by Kaspersky Lab, which received reports of a malware attack hitting a common Java vulnerability (CVE-2011-3544) on Russian websites, but without appearing to drop any files in order to instigate a conventional Trojan attack

via Researchers find new type of ‘fileless’ malware.