Security researchers have created a rootkit that can bury itself in an obscure part of the CPU, hiding it from current antivirus products. It will be demonstrated publicly at the Black Hat security conference in Las Vegas this summer.

Called a System Management Mode (SMM) rootkit, the software runs in a protected part of a computer's memory that can be locked and rendered invisible to the operating system, but which can give attackers a picture of what's happening in a computer's memory.

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