_:nd54469e943284e9598817eebddc7665axb3
<http://schema.org/description>
"An advanced persistent threat (APT) is a prolonged and targeted cyber attack in which an intruder gains access to a network and remains undetected for an extended period of time."
<https://www.techtarget.com/searchsecurity/definition/advanced-persistent-threat-APT>