Intel Active Management Technology (AMT)
Intel® Active Management Technology (Intel® AMT) is a feature of Intel® Core™ processors with Intel® vPro™ technology1,2 and workstation platforms based on select Intel® Xeon® processors. Intel® AMT uses integrated platform capabilities and popular third-party management and security applications, to allow IT or managed service providers to better discover, repair, and help protect their networked computing assets. Intel® AMT also saves time with remote maintenance and wireless manageability for your mobile workforce, and secure drive wiping to simplify PC lifecycle transitions.
See also the Wikipedia article.
AMT default login: Boot and press control-P. Login as admin/admin
AMT Forensics: Retrieve Intel AMT's Audit Log from a Linux machine without knowing the admin user's password. https://github.com/google/amt-forensics
AMT status checker for Linux: https://github.com/mjg59/mei-amt-check