APT (Advanced Persistent Threat)
Highly specialised, long-running attack campaign typically run by state-backed actors against strategic targets.
APT (Advanced Persistent Threat) describes highly specialised, long-running attack campaigns usually run by state-backed actors (e.g. "Fancy Bear" or "Lazarus Group"). Targets are typically governments, critical infrastructure, or large enterprises.
APT actors use undisclosed exploit kits, custom malware, and months of reconnaissance. Private users are rarely direct targets.
Why this matters in 2026
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How to protect yourself
A current operating system, an up-to-date antivirus suite, strong unique passwords (use a password manager) and two-factor authentication on all important accounts already cover the vast majority of real-world risk. Detailed guides: see our How-To section.